CN116603207A - Method for detoxication and improvement of iron powder activity by utilizing waste incineration fly ash - Google Patents
Method for detoxication and improvement of iron powder activity by utilizing waste incineration fly ash Download PDFInfo
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- CN116603207A CN116603207A CN202310582017.1A CN202310582017A CN116603207A CN 116603207 A CN116603207 A CN 116603207A CN 202310582017 A CN202310582017 A CN 202310582017A CN 116603207 A CN116603207 A CN 116603207A
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- incineration fly
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 256
- 239000010881 fly ash Substances 0.000 title claims abstract description 150
- 238000004056 waste incineration Methods 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000000694 effects Effects 0.000 title claims abstract description 32
- 230000006872 improvement Effects 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 120
- 239000004927 clay Substances 0.000 claims abstract description 75
- 239000010802 sludge Substances 0.000 claims abstract description 72
- 238000001354 calcination Methods 0.000 claims abstract description 43
- 238000001179 sorption measurement Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 13
- 231100000419 toxicity Toxicity 0.000 claims description 31
- 230000001988 toxicity Effects 0.000 claims description 31
- 238000002386 leaching Methods 0.000 claims description 22
- 239000000460 chlorine Substances 0.000 claims description 17
- 229910052801 chlorine Inorganic materials 0.000 claims description 17
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 238000007885 magnetic separation Methods 0.000 claims description 4
- 229910001060 Gray iron Inorganic materials 0.000 claims description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims 1
- 238000001784 detoxification Methods 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 22
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 17
- 230000002829 reductive effect Effects 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- 239000010813 municipal solid waste Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 229910001504 inorganic chloride Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000000197 pyrolysis Methods 0.000 description 5
- 230000033558 biomineral tissue development Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000003440 toxic substance Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000006184 cosolvent Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000000411 inducer Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 231100000167 toxic agent Toxicity 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000010718 Oxidation Activity Effects 0.000 description 2
- 238000004523 catalytic cracking Methods 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000006298 dechlorination reaction Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000001391 atomic fluorescence spectroscopy Methods 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/40—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by heating to effect chemical change, e.g. pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
- B01J20/0229—Compounds of Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/305—Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for detoxifying and improving iron powder activity by utilizing waste incineration fly ash, and belongs to the technical field of harmless disposal of dangerous wastes. The method comprises the following steps: uniformly mixing the waste incineration fly ash, clay powder and iron powder to obtain gray sticky iron powder; adding water into the gray clay iron powder and uniformly mixing to obtain gray clay iron powder mud; adding oil sludge into the gray clay iron powder sludge, uniformly mixing, and granulating to obtain a putty iron powder ceramsite raw material; drying the putty and iron powder ceramsite raw material to obtain dried iron powder; calcining the dried iron powder to obtain calcined iron powder; grinding and sorting the calcined iron powder to obtain active iron powder and waste incineration fly ash detoxication powder. The preparation process is simple, and the high Wen Xietong is used for treating the oil sludge, the waste incineration fly ash and the iron powder, so that the high-efficiency detoxification of the waste incineration fly ash and the synchronous improvement of the iron powder adsorption activity are realized.
Description
Technical Field
The invention belongs to the technical field of harmless disposal of hazardous waste, and particularly relates to a method for detoxifying and improving iron powder activity by utilizing waste incineration fly ash.
Background
The incineration can realize the rapid treatment of the garbage, realize the reduction of the garbage, and simultaneously can utilize the incineration heat to generate power and utilize waste heat. However, a large amount of flue gas is generated in the garbage incineration process, and the garbage incineration fly ash is captured from the cloth bag capturing module after the incineration flue gas is treated. The yield of the waste incineration fly ash is generally 3% -5% of the waste incineration, and the waste incineration fly ash generated by the existing 678 waste incineration power plants in the whole country is approximately 1200 ten thousand tons each year. The waste incineration fly ash contains about 1% of heavy metal pollutants and also contains high-toxicity dioxin substances. Therefore, the waste incineration fly ash has obvious toxicity to human bodies, is defined as dangerous waste, and is listed in the national hazardous waste directory, and is managed according to the dangerous waste.
Technical Specification for pollution control of fly ash from incineration of household refuse (trial)
The (HJ 1134-2020) standardizes and guides the disposal and environment management process of the household garbage incineration fly ash, and makes clear limit values on the heavy metal leaching toxicity, the dioxin content and the chlorine content of the disposal product of the garbage incineration fly ash. Therefore, in the harmless treatment of the waste incineration fly ash, the influence of each treatment factor on the leaching toxicity of heavy metal, the content of dioxin and the content of chlorine in the waste incineration fly ash needs to be comprehensively considered.
At present, the treatment approaches of the waste incineration fly ash mainly comprise landfill, high-temperature melting, high-temperature sintering, cement kiln cooperative treatment and the like, but the treatment methods have requirements on the chlorine content of the fly ash, so that the requirements can be met only by carrying out dechlorination pretreatment on the fly ash, the process is complicated, the requirements are higher, the content of toxic substances after treatment is still higher, and the treatment effect is poor. In addition, at present, zinc-containing mud and waste incineration fly ash are treated cooperatively, but the method can reduce the chlorine content, but the dechlorination is carried out through a multi-stage water washing system, the treatment process is complex, the activity of the obtained reductive iron powder is low, the heavy metal adsorption capacity is small, and the treatment result of heavy metal polluted water is poor.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a method for detoxifying and improving the activity of iron powder by utilizing waste incineration fly ash, so that the method not only can detoxify the waste incineration fly ash but also can simultaneously improve the activity of the iron powder in the process of disposing the waste incineration fly ash.
The invention provides a method for detoxication and improving the activity of iron powder by utilizing waste incineration fly ash, which comprises the following steps: uniformly mixing the waste incineration fly ash, clay powder and iron powder to obtain gray sticky iron powder;
adding water into the gray clay iron powder and uniformly mixing to obtain gray clay iron powder mud;
adding oil sludge into the gray clay iron powder sludge, uniformly mixing, and granulating to obtain a putty iron powder ceramsite raw material;
drying the putty iron powder ceramsite raw material to obtain dried iron powder;
calcining the dried iron powder to obtain calcined iron powder;
grinding and sorting the calcined iron powder to obtain active iron powder and waste incineration fly ash detoxication powder.
Optionally, the mass ratio of the waste incineration fly ash to the clay powder to the iron powder is (2.5-22.5): (15-45): 100.
Optionally, the liquid-solid ratio of the water to the gray iron powder is 25-45:100 mL/g.
Optionally, the mass ratio of the oil sludge to the gray clay iron powder sludge is (0.5-4.5) 100.
Optionally, the drying temperature ranges from 50 ℃ to 250 ℃ and the drying time ranges from 6 hours to 36 hours
Optionally, the calcination time ranges from 20 minutes to 60 minutes, and the calcination temperature ranges from 700 ℃ to 1300 DEG C
Optionally, grinding and sorting the calcined iron powder to obtain active iron powder and waste incineration fly ash detoxication powder, which comprises the following steps:
grinding the calcined iron powder into powder, carrying out magnetic separation on the powder, wherein the powder subjected to magnetic separation is active iron powder, and the rest powder is waste incineration fly ash detoxication powder.
Optionally, the adsorption capacity of Cr (VI) in the active iron powder is higher than 68mg/g, and the adsorption capacity of Hg (II) is higher than 32mg/g.
Optionally, pb (II) leaching toxicity in the fly ash detoxication powder of the waste incineration is lower than 8.5X10 -3 mg/L, cd (II) leaching toxicity is lower than 7.15X10 -3 mg/L, chlorine content lower than 0.6%, and dioxin content lower than 24ng-TEQ/kg.
The invention provides a method for detoxication and improving the activity of iron powder by utilizing waste incineration fly ash, which comprises the following steps: uniformly mixing the waste incineration fly ash, clay powder and iron powder to obtain gray sticky iron powder; adding water into the gray clay iron powder and uniformly mixing to obtain gray clay iron powder mud; adding oil sludge into the gray clay iron powder sludge, uniformly mixing, and granulating to obtain a putty iron powder ceramsite raw material; drying the putty and iron powder ceramsite raw material to obtain dried iron powder; calcining the dried iron powder to obtain calcined iron powder; grinding and sorting the calcined iron powder to obtain active iron powder and waste incineration fly ash detoxication powder. The preparation process is simple, and the high Wen Xietong is used for treating the oil sludge, the waste incineration fly ash and the iron powder, so that the high-efficiency detoxification of the waste incineration fly ash and the synchronous improvement of the iron powder adsorption activity are realized.
Drawings
FIG. 1 is a flow chart of a method for detoxication and improvement of iron powder activity by utilizing waste incineration fly ash according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for detoxifying and improving the activity of iron powder by utilizing waste incineration fly ash according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present invention to those skilled in the art. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention belong to the protection scope of the present invention.
Unless specifically stated otherwise, technical or scientific terms used herein should be defined in the general sense as understood by one of ordinary skill in the art to which this invention belongs. The use of "including" or "comprising" and the like in the present invention does not limit the number, steps, operations and/or groups thereof mentioned nor preclude the presence or addition of one or more other different numbers, steps, operations and/or groups thereof.
As shown in fig. 1 and 2, the present invention provides a method S100 for detoxication and improving iron powder activity by using waste incineration fly ash, comprising steps S110 to S160:
s110, uniformly mixing the waste incineration fly ash, clay powder and iron powder to obtain gray sticky iron powder.
Specifically, in step S110, 100 parts of the components are mixed and stirred uniformly according to the mass ratio of (2.5-22.5) to (15-45) to obtain gray glutinous iron powder.
In the present embodiment, when the three components of the waste incineration fly ash, the clay powder and the iron powder are within the preferred mass ratio ranges, the prepared waste incineration fly ash detoxication powder has low toxic substance content, i.e. the toxicity is the lowest, and the heavy metal adsorption content of the active iron powder is high.
When the amount of the waste incineration fly ash is smaller than the above preferred range, the addition of the waste incineration fly ash and the clay powder is smaller, the catalytic cracking, the carbothermal chlorination and the carbo-iron reaction are insufficient, so that the toxicity of the detoxified waste incineration fly ash is remarkably increased as the mass ratio of the waste incineration fly ash, the clay powder and the iron powder is reduced, and the adsorption capacity of the activated iron powder is remarkably reduced as the mass ratio of the waste incineration fly ash, the clay powder and the iron powder is reduced.
It should be further noted that, above the above preferred range, the waste incineration fly ash and clay powder are excessively added, and the reaction between materials is unbalanced, resulting in that the toxicity of the waste incineration fly ash detoxified powder is significantly increased with further increase of the mass ratio of the waste incineration fly ash, clay powder and iron powder, and the adsorption capacity of the active iron powder is significantly reduced with further increase of the mass ratio of the waste incineration fly ash, clay powder and iron powder.
And S120, adding water into the gray clay iron powder, and uniformly mixing to obtain gray clay iron powder mud.
Specifically, adding water into gray glutinous iron powder according to a liquid-solid ratio of 25-45:100 mL/g, and uniformly stirring to obtain gray glutinous iron powder mud.
S130, adding the oil sludge into the gray clay iron powder sludge, uniformly mixing, and granulating to obtain the putty iron powder ceramsite raw material.
Specifically, 100 mass percent (0.5-4.5) of oil sludge is added into the gray clay iron powder sludge, and the mixture is stirred uniformly and granulated to obtain the putty iron powder ceramsite raw material.
In the present embodiment, when the oil sludge and the fine iron dust sludge are both in the above preferred mass ratio ranges, the prepared fly ash detoxication powder for waste incineration has a low toxic substance content, i.e., the toxicity is the lowest, and the heavy metal adsorption content of the active iron powder is high.
When the ratio is lower than the above preferable range, the addition of the sludge is small, the reaction between the materials is insufficient, so that the toxicity of the fly ash detoxified powder for garbage incineration is remarkably increased with the reduction of the mass ratio of the sludge to the fine iron dust, and the adsorption capacity of the active iron powder is remarkably reduced with the reduction of the mass ratio of the sludge to the fine iron dust.
It should be further noted that above the above preferred range, the sludge is added excessively, the reaction between materials is unbalanced, resulting in a significant increase in the toxicity of the fly ash detoxified powder of waste incineration as the mass ratio of sludge to fine iron dust is further increased, while the adsorption capacity of active iron powder is significantly reduced as the mass ratio of sludge to fine iron dust is further increased.
And S140, drying the putty iron powder ceramsite raw material to obtain the dried iron powder.
Specifically, the putty iron powder ceramsite raw material is dried for 6 to 36 hours to obtain the dried iron powder, wherein the drying temperature is 50 to 250 ℃.
And S150, calcining the dried iron powder to obtain calcined iron powder.
Specifically, the dried iron powder is put into a kiln for calcination for 20 to 60 minutes, poured out and cooled to obtain the calcined iron powder, wherein the calcination temperature is 700 to 1300 ℃.
In this embodiment, when the calcination time is within the above preferred range, the prepared fly ash detoxication powder for refuse incineration has a low toxic substance content, i.e., the toxicity is the lowest, and the heavy metal adsorption content of the active iron powder is high.
When the calcination time is less than the above preferred range, the calcination time is insufficient and the reaction is insufficient, resulting in a significant increase in the toxicity of the fly ash detoxified powder by garbage incineration with a decrease in the calcination time, while the adsorption capacity of the active iron powder is significantly decreased with a decrease in the calcination time.
It should be further noted that, when the calcination time is higher than the above preferred range, the calcination time is too long, and the material is excessively calcined, resulting in a significant increase in toxicity of the fly ash detoxified powder of waste incineration with further increase of the calcination time, while the adsorption capacity of the activated iron powder is significantly reduced with further increase of the mass ratio of the sludge to the fine clay powder.
S160, grinding and sorting the calcined iron powder to obtain the active iron powder and the fly ash detoxication powder for garbage incineration.
Specifically, the calcined iron powder is ground into powder, the obtained iron powder is active iron powder, and the powder remained after the separation of the iron powder is the fly ash detoxication powder of the waste incineration.
In the present embodiment, the reaction mechanism is as follows: in the calcination process of the dried iron powder, inorganic chloride in the waste incineration fly ash catalyzes the mineralization and decomposition of dioxin pollutants in a high-temperature environment, and catalyzes the cracking of organic matters in the oil sludge to generate carbon dioxide, water vapor and micromolecular organic gas, meanwhile, the inorganic chloride and the water vapor in the waste incineration fly ash permeate and migrate into iron powder particles, and destroy the metallographic structure of the iron powder through potential corrosion and chemical corrosion, so that the iron powder binding energy and adsorption activity are increased, and the micromolecular organic gas generated by the cracking of the oil sludge can inhibit the electronic loss in the iron powder metallographic phase through surface reduction, so that the iron powder is prevented from losing activity due to excessive corrosion and oxidation. Meanwhile, the steam and the micromolecular organic gas released by the pyrolysis of the oil sludge can also improve the activity of minerals in the clay powder, so that the reaction of the clay powder and the waste incineration fly ash is promoted. The ferric oxide oxidized by partial iron powder and the chloride in the waste incineration fly ash can play a role of a cosolvent and an adhesion inducer to accelerate the melting of the clay powder, thereby further promoting the reaction and fusion of the clay powder melt and mineral components in the waste incineration fly ash to form a stable sintered body. Heavy metal pollutants in the waste incineration fly ash are effectively fixed in the clay powder melt. And grinding the calcined iron powder into powder, separating out the magnetic iron powder, and obtaining the rest solid powder, namely the detoxified sintered body of the waste incineration fly ash.
Further, based on the method provided by the embodiment, the adsorption capacity of Cr (VI) in the prepared active iron powder is higher than 68mg/g, and the adsorption capacity of Hg (II) is higher than 32mg/g. Pb (II) leaching toxicity in the fly ash detoxication powder of the waste incineration is lower than 8.5 multiplied by 10 -3 mg/L, cd (II) leaching toxicity is lower than 7.15X10 -3 mg/L, chlorine content lower than 0.6%, and dioxin content lower than 24ng-TEQ/kg. That is, the method of the invention can detoxify the waste incineration fly ash and improve the activity of the iron powder.
The method for detoxification and iron powder activity enhancement by utilizing the waste incineration fly ash will be further described with reference to several specific examples:
example 1
The example takes the influence of different mass ratios of the waste incineration fly ash, clay powder and iron powder on the performance of the detoxified powder and the active iron powder of the prepared waste incineration fly ash as an example, and comprises the following steps:
s1, mixing the waste incineration fly ash, clay powder and iron powder according to the mass ratio of 1:15:100, 1.5:15:100, 2:15:100, 2.5:7.5:100, 2.5:10:100, 2.5:12.5:100, 2.5:15:100, 12.5:15:100, 22.5:15:100, 2.5:30:100, 12.5:30:100, 22.5:30:100, 2.5:45:100, 12.5:45:100, 22.5:45:100, 22.5:50:100, 22.5:55:100, 22.5:60:100, 25:45:100, 27.5:45:100 and 30:45:100 respectively, and stirring uniformly to obtain gray sticky iron powder;
s2, adding water into the gray glutinous iron powder according to a liquid-solid ratio of 25:100mL/g, and uniformly stirring to obtain gray glutinous iron powder mud;
s3, adding oil sludge into the gray glutinous iron powder sludge according to the mass ratio of 0.5:100, uniformly stirring, and granulating to obtain a putty iron powder ceramsite raw material;
s4, drying the putty iron powder ceramsite raw material for 6 hours to obtain dried iron powder, wherein the drying temperature is 50 ℃;
s5, placing the dried iron powder into a kiln for calcination for 20 minutes, pouring out and cooling to obtain calcined iron powder, wherein the calcination temperature is 700 ℃;
s6, grinding the calcined iron powder into powder, and magnetically separating the iron powder to obtain active iron powder, wherein the powder left after the separation of the iron powder is the fly ash detoxication powder of the waste incineration.
The waste incineration fly ash red mud adopted in the embodiment is provided by a company of a waste incineration power plant which is commonly mature in Jiangsu, and main detection components include: : mainly comprises 36.2 percent of CaO, 23.9 percent of Cl and 11.0 percent of SO 3 、11.6％Na 2 O、6.33％K 2 O、4.38％SiO 2 、1.40％Fe 2 O 3 、1.25％Al 2 O 3 And other ingredients.
It should be further noted that, in this embodiment, the heavy metal content, chlorine content and dioxin content of the prepared fly ash detoxication powder for waste incineration are also detected, and the water body containing heavy metal ions is treated and measured, and the specific measurement process is shown in table 1 below.
Wherein, the heavy metal leaching test of the fly ash detoxication powder of the waste incineration: the fly ash detoxication powder from the waste incineration is used for preparing leaching liquid according to the method of horizontal oscillation method of solid waste leaching toxicity leaching method (HJ 557), and the concentration of heavy metals in the leaching liquid is measured by an inductively coupled plasma mass spectrometer (Thermo Scientific) TM ELEMENT TM ) And (5) detecting.
Determination of chlorine content of fly ash detoxification powder of waste incineration: the chlorine content in the fly ash detoxication powder of the waste incineration is measured according to the "sand for building" (GB/T14684-2011).
Detecting and testing the content of dioxin in the fly ash detoxication powder of the waste incineration: the detection of the content of dioxin in the fly ash detoxified powder of the garbage incineration is carried out by referring to technical Specification for pollution control of fly ash of the household garbage incineration (HJ 1134).
And (3) treating the water body containing heavy metal ions: the solid/liquid ratio of the active iron powder to the water body containing heavy metal ions is 1g:1L, the iron-based adsorbent powder was put into a water body having an initial pH of 2 and containing 200mg/L Cr (VI) and 50mg/L Hg (II), and stirred at 120rpm for 10 minutes.
The concentration of heavy metal ions in a water body is measured, wherein the concentration of Pb (II) and Cd (II) is measured according to an inductively coupled plasma emission spectrometry (HJ 776-2015) for measuring 32 elements of water quality, the concentration of Cr (VI) is measured according to a flow injection-dibenzoyl dihydrazide photometry (HJ 908-2017) for measuring hexavalent chromium of water quality, and the concentration of Hg (II) is measured according to an atomic fluorescence spectrometry (HJ 694-2014) for measuring mercury, arsenic, selenium, bismuth and antimony of water quality.
TABLE 1 results of different mass ratios of fly ash, clay powder and iron powder for refuse incineration to influence the properties of detoxified powder and active iron powder of the prepared fly ash
As can be seen from table 1 above, when the mass ratio of waste incineration fly ash, clay powder, iron powder is less than 2.5:15:100 (e.g., waste incineration fly ash, clay powder, iron powder mass ratio = 1.5:20:100, 1:20:100, 0.5:20:100, 2:17.5:100, 2:15:100, 2:12.5:100, and lower ratios not listed in table 1), the waste incineration fly ash and clay powder are less added, catalytic cracking, carbothermal chlorination, carboiron reaction are insufficient, resulting in a significant increase in waste incineration fly ash detoxification powder toxicity as the mass ratio of waste incineration fly ash, clay powder, iron powder decreases, while the active iron powder adsorption capacity is significantly reduced as the mass ratio of waste incineration fly ash, clay powder, iron powder decreases.
Further, when the mass ratio of the waste incineration fly ash, the clay powder and the iron powder is equal to 2.5-22.5:15-45:100 (for example, the mass ratio of the waste incineration fly ash, the clay powder and the iron powder=2.5:15:100, 12.5:15:100, 22.5:15:100, 2.5:30:100, 12.5:30:100, 22.5:30:100, 2.5:45:100, 12.5:45:100 and 22.5:45:100), in the calcination process of the dried iron powder, inorganic chloride in the waste incineration fly ash catalyzes the mineralization and decomposition of dioxin pollutants in a high-temperature environment, organic matters in the oil sludge are catalyzed to generate carbon dioxide, water vapor and small molecular organic gases, and the inorganic chloride and the water vapor in the waste incineration fly ash permeate and migrate into iron powder particles, the metallographic structure of the waste incineration fly ash is destroyed by electric potential corrosion and chemical corrosion, the binding energy and adsorption activity are increased, and the small molecular organic gases generated by the iron powder pyrolysis can inhibit the electron loss in the metallographic phase by surface reduction, and the iron powder is prevented from losing excessive oxidation activity due to the oxidation activity.
Finally, the leaching toxicity of the Pb (II) of the waste incineration fly ash detoxication powder prepared in the preferable mass ratio range is lower than 8.5X10 -3 The leaching toxicity of the Cd (II) is lower than 7.15X10 at mg/L -3 mg/L, chlorine content is lower than 0.6%, and dioxin content is lower than 24ng-TEQ/kg; the adsorption capacity of the active iron powder Cr (VI) is higher than 68mg/g, and the adsorption capacity of the active iron powder Hg (II) is higher than 32mg/g.
Still further, when the waste incineration fly ash, clay powder, iron powder mass ratio is greater than 22.5:45:100 (e.g., waste incineration fly ash, clay powder, iron powder mass ratio = 22.5:50:100, 22.5:55:100, 22.5:60:100, 25:45:100, 27.5:45:100, 30:45:100, and higher ratios not listed in table 1), the waste incineration fly ash and clay powder are added in excess, the reaction between materials is unbalanced, resulting in a significant increase in waste incineration fly ash detoxication powder toxicity as the waste incineration fly ash, clay powder, iron powder mass ratio is further increased, while the active iron powder adsorption capacity is significantly reduced as the waste incineration fly ash, clay powder, iron powder mass ratio is further increased.
Therefore, in general, the combination of benefits and costs is most beneficial to improving the performance of the prepared fly ash detoxification powder and active iron powder when the mass ratio of the fly ash, clay powder and iron powder is equal to 2.5-22.5:15-45:100.
Example 2
The example takes the influence of different oil sludge and gray clay iron powder sludge mass ratios on the performance of the prepared waste incineration fly ash detoxication powder and active iron powder as an example, and comprises the following steps:
s1, respectively mixing waste incineration fly ash, clay powder and iron powder according to a mass ratio of 22.5:45:100, and uniformly stirring to obtain gray glutinous iron powder;
s2, adding water into the gray glutinous iron powder according to a liquid-solid ratio of 35:100mL/g, and uniformly stirring to obtain gray glutinous iron powder mud;
s3, adding oil sludge into the gray iron powder sludge according to the mass ratio of 0.25:100, 0.3:100, 0.4:100, 0.5:100, 2.5:100, 4.5:100, 5:100, 5.5:100 and 6:100, uniformly stirring, and granulating to obtain a putty iron powder ceramsite raw material;
s4, drying the putty iron powder ceramsite raw material for 21 hours to obtain dried iron powder, wherein the drying temperature is 150 ℃;
s5, placing the dried iron powder into a kiln for calcination for 40 minutes, pouring out and cooling to obtain calcined iron powder, wherein the calcination temperature is 1000 ℃;
s6, grinding the calcined iron powder into powder, and magnetically separating the iron powder to obtain active iron powder, wherein the powder left after the separation of the iron powder is the fly ash detoxication powder of the waste incineration.
The waste incineration fly ash, the waste incineration fly ash detoxified powder heavy metal leaching test, the chlorine content measurement, the test for detecting the dioxin content in the waste incineration fly ash detoxified powder, the treatment and the measurement of the heavy metal ion-containing water body are the same as those of example 1, and the measurement results are shown in table 2.
TABLE 2 different sludge and gray clay iron powder sludge mass ratios impact results on the performance of the prepared fly ash detoxification powder and active iron powder for waste incineration
As can be seen from table 2 above, when the sludge and gray iron-sticky sludge mass ratio is less than 0.5:100 (e.g., sludge and gray iron-sticky sludge mass ratio=0.4:100, 0.3:100, 0.25:100, and lower ratios not listed in table 2), the sludge addition is less, the inter-material reaction is insufficient, resulting in a significant increase in waste incineration fly ash detoxication powder toxicity with a decrease in sludge and gray iron-sticky sludge mass ratio, while the active iron adsorption capacity is significantly decreased with a decrease in sludge and gray iron-sticky sludge mass ratio.
Further, when the mass ratio of the oil sludge to the gray clay iron powder sludge is equal to 0.5-4.5:100 (for example, the mass ratio of the oil sludge to the gray clay iron powder sludge=0.5:100, 2.5:100 and 4.5:100), in the process of calcining the dried iron powder, inorganic chloride salt in the waste incineration fly ash catalyzes the mineralization decomposition of dioxin pollutants in a high-temperature environment, organic matters in the oil sludge are catalyzed to be cracked to generate carbon dioxide, water vapor and micromolecular organic gas, and simultaneously the inorganic chloride salt and the water vapor in the waste incineration fly ash permeate and migrate into iron powder particles, the metallographic structure of the iron powder is damaged through potential corrosion and chemical corrosion, the bonding energy and the adsorption activity of the iron powder are increased, and the micromolecular organic gas generated by the cracking of the oil sludge can inhibit the electronic loss in the metallographic phase of the iron powder through surface reduction, so that the iron powder is prevented from losing activity due to excessive corrosion and oxidization. Meanwhile, the steam and the micromolecular organic gas released by the pyrolysis of the oil sludge can also improve the activity of minerals in the clay powder, so that the reaction of the clay powder and the waste incineration fly ash is promoted. The ferric oxide oxidized by partial iron powder and the chloride in the waste incineration fly ash can play a role of a cosolvent and an adhesion inducer to accelerate the melting of the clay powder, thereby further promoting the reaction and fusion of the clay powder melt and mineral components in the waste incineration fly ash to form a stable sintered body.
Finally, the leaching toxicity of the Pb (II) of the waste incineration fly ash detoxication powder prepared in the preferable mass ratio range is lower than 2.8x10 -4 The leaching toxicity of the Cd (II) is lower than 5.4X10 at the concentration of mg/L -5 mg/L, chlorine content is lower than 0.5%, and dioxin content is lower than 17ng-TEQ/kg; the adsorption capacity of the active iron powder Cr (VI) is higher than 77mg/g, and the adsorption capacity of the active iron powder Hg (II) is higher than 39mg/g.
Still further, when the sludge and gray clay iron sludge mass ratio is greater than 4.5:100 (e.g., sludge and gray clay iron sludge mass ratio = 5:100, 5.5:100, 6:100, and higher ratios not listed in table 2), the sludge is added in excess, the inter-material reaction is unbalanced, resulting in a significant increase in waste incineration fly ash detoxication powder toxicity with further increase in sludge and gray clay iron sludge mass ratio, while the active iron adsorption capacity is significantly reduced with further increase in sludge and gray clay iron sludge mass ratio.
Therefore, in general, the combination of benefits and costs is most beneficial to improving the performance of the prepared fly ash detoxification powder and active iron powder of waste incineration when the mass ratio of the sludge to the gray clay iron powder is equal to 0.5-4.5:100 in the embodiment.
Example 3
This example illustrates the effect of different calcination times on the performance of the fly ash detoxication powder and active iron powder produced by waste incineration, and includes the following steps:
s1, respectively mixing waste incineration fly ash, clay powder and iron powder according to a mass ratio of 22.5:45:100, and uniformly stirring to obtain gray glutinous iron powder;
s2, adding water into the gray glutinous iron powder according to a liquid-solid ratio of 45:100mL/g, and uniformly stirring to obtain gray glutinous iron powder mud;
s3, adding oil sludge into the gray glutinous iron powder sludge according to the mass ratio of 4.5:100, uniformly stirring, and granulating to obtain a putty iron powder ceramsite raw material;
s4, drying the putty iron powder ceramsite raw material for 36 hours to obtain dried iron powder, wherein the drying temperature is 250 ℃;
s5, loading the dried iron powder into a kiln for calcination for 5 minutes, 10 minutes, 15 minutes, 20 minutes, 40 minutes, 60 minutes, 65 minutes, 70 minutes and 75 minutes, pouring out and cooling to obtain calcined iron powder, wherein the calcination temperature is 1300 ℃;
s6, grinding the calcined iron powder into powder, and magnetically separating the iron powder to obtain active iron powder, wherein the powder left after the separation of the iron powder is the fly ash detoxication powder of the waste incineration.
The waste incineration fly ash, the waste incineration fly ash detoxified powder heavy metal leaching test, the chlorine content measurement, the dioxin content detection test in the waste incineration fly ash detoxified powder, the treatment and the measurement of the heavy metal ion-containing water body are the same as those of example 1, and the measurement results are shown in table 3.
TABLE 3 effect of different calcination times on the Performance of the prepared fly ash detoxication powder and active iron powder
As can be seen from the above table 3, when the calcination time is less than 20 minutes (for example, calcination time=15 minutes, 10 minutes, 5 minutes, and lower ratios not listed in table 3), the calcination time is insufficient, the reaction is insufficient, resulting in a significant increase in the toxicity of the waste incineration fly ash detoxified powder with a decrease in the calcination time, and the active iron powder adsorption capacity is significantly decreased with a decrease in the calcination time.
Further, when the calcination time is equal to 20-60 minutes (for example, calcination time=20 minutes, 40 minutes, 60 minutes), in the calcination process of the dried iron powder, inorganic chloride in the waste incineration fly ash catalyzes the mineralization and decomposition of dioxin pollutants in a high-temperature environment, organic matters in the catalytic oil sludge are cracked to generate carbon dioxide, water vapor and micromolecular organic gas, and meanwhile, the inorganic chloride and the water vapor in the waste incineration fly ash permeate and migrate into iron powder particles, and destroy the metallographic structure of the iron powder through potential corrosion and chemical corrosion, so that the iron powder binding energy and adsorption activity are increased, and the micromolecular organic gas generated by the pyrolysis of the oil sludge can inhibit the electron loss in the metallographic phase of the iron powder through surface reduction, so that the iron powder is prevented from losing activity due to excessive corrosion and oxidation. Meanwhile, the steam and the micromolecular organic gas released by the pyrolysis of the oil sludge can also improve the activity of minerals in the clay powder, so that the reaction of the clay powder and the waste incineration fly ash is promoted. The ferric oxide oxidized by partial iron powder and the chloride in the waste incineration fly ash can play a role of a cosolvent and an adhesion inducer to accelerate the melting of the clay powder, thereby further promoting the reaction and fusion of the clay powder melt and mineral components in the waste incineration fly ash to form a stable sintered body. Heavy metal pollutants in the waste incineration fly ash are effectively fixed in the clay powder melt.
Finally, the leaching toxicity of the prepared waste incineration fly ash detoxication powder Pb (II) is lower than 6.9X10 -5 The leaching toxicity of the Cd (II) is lower than 7.2 multiplied by 10 in mg/L -6 mg/L, chlorine content is lower than 0.4%, and dioxin content is lower than 13ng-TEQ/kg; the adsorption capacity of the active iron powder Cr (VI) is higher than 84mg/g, and the adsorption capacity of the active iron powder Hg (II) is higher than 44mg/g.
Further, when the calcination time is greater than 60 minutes (for example, calcination time=65 minutes, 70 minutes, 75 minutes, and higher ratios not listed in table 3), the calcination time is too long, and the material is excessively calcined, resulting in a significant increase in the toxicity of the fly ash detoxified powder of waste incineration with further increase in the calcination time, while the adsorption capacity of the active iron powder is significantly reduced with further increase in the mass ratio of the sludge to the fine clay powder of ash.
Thus, in general, the combination of benefits and costs, in this example, the improvement of the properties of the fly ash detoxification powder and the active iron powder produced by the incineration of waste is most advantageous when the calcination time is equal to 20 to 60 minutes.
The invention provides a method for detoxication and improvement of iron powder activity by utilizing waste incineration fly ash, which has the following beneficial effects:
first, the preparation process of the invention is simple, and the high Wen Xietong is used for treating the oil sludge, the waste incineration fly ash and the iron powder, so that the high-efficiency detoxification of the waste incineration fly ash and the synchronous promotion of the iron powder adsorption activity are realized, and compared with the original iron powder, the adsorption capacity of the treated iron powder is obviously increased.
Secondly, the chlorine content of the waste incineration fly ash detoxified by the method is lower than 1%, and the leaching concentration of heavy metals and the content of dioxin meet the pollution control requirement of the technical Specification for pollution control of household waste incineration fly ash (HJ 1134-2020).
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (9)
1. A method for detoxication and improving the activity of iron powder by utilizing waste incineration fly ash is characterized by comprising the following steps: uniformly mixing the waste incineration fly ash, clay powder and iron powder to obtain gray sticky iron powder;
adding water into the gray clay iron powder and uniformly mixing to obtain gray clay iron powder mud;
adding oil sludge into the gray clay iron powder sludge, uniformly mixing, and granulating to obtain a putty iron powder ceramsite raw material;
drying the putty iron powder ceramsite raw material to obtain dried iron powder;
calcining the dried iron powder to obtain calcined iron powder;
grinding and sorting the calcined iron powder to obtain active iron powder and waste incineration fly ash detoxication powder.
2. The method according to claim 1, wherein the mass ratio of the waste incineration fly ash, the clay powder and the iron powder is in the range of (2.5-22.5): (15-45): 100.
3. The method of claim 1, wherein the liquid to solid ratio of the water to the gray iron powder is 25-45:100 ml/g.
4. The method according to claim 1, wherein the mass ratio of the oil sludge to the gray clay iron powder sludge is (0.5-4.5): 100.
5. The method of claim 1, wherein the drying temperature ranges from 50 ℃ to 250 ℃ and the drying time ranges from 6 hours to 36 hours.
6. The method of claim 1, wherein the calcination time ranges from 20 minutes to 60 minutes and the calcination temperature ranges from 700 ℃ to 1300 ℃.
7. The method according to any one of claims 1 to 6, wherein the grinding and sorting of the calcined iron powder to obtain the activated iron powder and the fly ash detoxication powder comprises:
grinding the calcined iron powder into powder, carrying out magnetic separation on the powder, wherein the powder subjected to magnetic separation is active iron powder, and the rest powder is waste incineration fly ash detoxication powder.
8. The method according to any one of claims 1 to 6, wherein the active iron powder has a Cr (VI) adsorption capacity higher than 68mg/g and a Hg (II) adsorption capacity higher than 32mg/g.
9. The method according to any one of claims 1 to 6, wherein the Pb (II) leaching toxicity in the fly ash detoxication powder of waste incineration is lower than 8.5X10 -3 mg/L, cd (II) leaching toxicity is lower than 7.15X10 -3 mg/L, chlorine content lower than 0.6%, and dioxin content lower than 24ng-TEQ/kg.
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