CN113860763A - Steel slag active exciting agent and active steel slag - Google Patents
Steel slag active exciting agent and active steel slag Download PDFInfo
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- CN113860763A CN113860763A CN202111284809.8A CN202111284809A CN113860763A CN 113860763 A CN113860763 A CN 113860763A CN 202111284809 A CN202111284809 A CN 202111284809A CN 113860763 A CN113860763 A CN 113860763A
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- steel slag
- parts
- desulfurized
- active
- alkaline residue
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 194
- 239000010959 steel Substances 0.000 title claims abstract description 194
- 239000002893 slag Substances 0.000 title claims abstract description 192
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 66
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 62
- 239000010440 gypsum Substances 0.000 claims abstract description 62
- 230000000694 effects Effects 0.000 claims abstract description 49
- 239000002956 ash Substances 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 21
- 230000023556 desulfurization Effects 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 230000003009 desulfurizing effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003518 caustics Substances 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 238000009621 Solvay process Methods 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000012190 activator Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 30
- 230000005284 excitation Effects 0.000 abstract description 15
- 230000002195 synergetic effect Effects 0.000 abstract description 6
- 239000004566 building material Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 10
- 238000010298 pulverizing process Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 150000004645 aluminates Chemical class 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- -1 iron aluminate Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003334 potential effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
- C04B7/425—Acids or salts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to the field of building materials, in particular to a steel slag active exciting agent and active steel slag. The steel slag activity excitant comprises 2-7 parts of desulfurized gypsum, 1-5 parts of alkaline residue and 0.1-2 parts of desulfurized ash; the desulfurization ash is powdery, and the specific surface area of the desulfurization ash is 450m2More than kg. The steel slag activity excitant provided by the application has the advantages of simple formula and good excitation effect; solves the contradiction between the complex degree of the formula of the steel slag activity excitant and the excitation activity. The synergistic effect is generated among the alkaline residue, the desulfurized gypsum and the desulfurized fly ash in the steel slag activity excitant, so that the active steel slag powder of the steel slag after the excitant is added has high activity. Compared with the steel slag cement without the addition of the excitant, the steel slag cement with the addition of the excitant has the compressive strength of 107 percent after 28 days.
Description
Technical Field
The application relates to the field of building materials, in particular to a steel slag active exciting agent and active steel slag.
Background
The steel slag is solid waste produced in the steel-making process, is grey brown, has micropores, is dense and has heavier texture, and the main chemical components are aluminate, silicate and iron aluminate minerals.
The steel slag yield accounts for 8-15% of the steel yield; therefore, the problem of treatment and resource utilization of steel slag is also more and more emphasized. However, the current situation of the actual comprehensive utilization of steel slag in China is not optimistic, and particularly, the utilization rate of the steel slag of the converter is only 10-20%. The steel slag produced by domestic iron and steel enterprises can not be treated in time, so that a large amount of steel slag occupies land and pollutes the environment. However, the steel slag is not an unusable solid waste, and aluminate, silicate and iron aluminate minerals contained in the steel slag have potential activity; the production of cement by using steel slag is one of the most important ways for the comprehensive utilization of steel slag. However, the current research shows that the steel slag has the problems of low activity, slow hydration and the like, and the strength of the cement is rapidly reduced and the volume stability is deteriorated along with the increase of the mixing amount of the steel slag in the cement, so that the further use of the steel slag is limited. In order to further realize the large-scale application of the steel slag, an excitant is required to perform active excitation on the steel slag to improve the existing problems. However, the prior excitant has the following technical defects: firstly, the formula is simple, but the excitation effect is poor; secondly, the excitation effect is good, but the formula is complex, and some organic components and microorganism components are even added, so that the cost is high, and the method cannot be used for actual production.
Disclosure of Invention
In order to solve the technical problem that the complexity of the formula of the excitant and the excitation effect (steel slag activity) of the excitant are contradictory in the process of producing steel slag cement by using steel slag, the application provides a steel slag activity excitant and active steel slag, which have simple formula and can obviously improve the steel slag activity.
In order to obtain the excitant with simple formula and good excitation effect, a great deal of experimental research is carried out in the application:
a certain amount of desulfurized gypsum or alkaline residue as an excitant has an excitation effect on the steel slag, the activity of the steel slag can be improved, but the excitation effect is not obvious, the expected effect cannot be achieved, and the activity of the steel slag still needs to be improved continuously.
The inventor compounds the desulfurized gypsum and the alkaline residue in various proportions as an excitant, and experimental results show that: the desulfurized gypsum and the alkaline residue are compounded according to a specific proportion, so that the synergistic effect is achieved, and compared with the case that the desulfurized gypsum or the alkaline residue is used as an excitant, the excitation effect is obviously improved.
The technical scheme of the application is as follows:
the steel slag activity excitant contains 2-7 parts of desulfurized gypsum and 1-5 parts of alkaline residue, wherein the desulfurized gypsum and the alkaline residue are in powder form, and the specific surface area of the desulfurized gypsum and the alkaline residue is 450m2More than kg; the alkaline residue is the waste residue discharged in the process of preparing alkali by an ammonia-soda process.
Optionally, the steel slag activity excitant consists of 2-7 parts of desulfurized gypsum and 1-5 parts of alkaline residue; specifically, the gypsum composition comprises 5 parts of desulfurized gypsum and 3 parts of caustic sludge.
And a certain amount of desulfurized ash is added into the steel slag excitant, so that the excitation effect can be further effectively improved. The desulfurized ash is used as the exciting agent alone, has no obvious excitation effect on the steel slag, and can not improve the activity of the steel slag. The possible explanation is that the desulfurized gypsum, the alkaline residue and the desulfurized fly ash have synergistic effect under the condition of specific dosage; although the specific synergistic action mechanism of the desulfurized gypsum, the caustic sludge and the desulfurized fly ash is not clear, the synergistic effect of the desulfurized gypsum, the caustic sludge and the desulfurized fly ash is clear and remarkable.
Preferably, the steel slag activity excitant consists of 2-7 parts of desulfurized gypsum, 1-5 parts of alkaline residue and 0.1-2 parts of desulfurized ash; the desulfurization ash is powdery, and the specific surface area of the desulfurization ash is 450m2More than kg; the desulfurization ash is a dry desulfurization byproduct obtained by using quick lime (cao) as a desulfurizing agent, evaporating water in the desulfurizing agent or spraying atomized water into a desulfurizing tower by using sensible heat of flue gas, reducing the temperature of the flue gas instantaneously and greatly increasing the relative humidity, and carrying out chemical reaction on the desulfurizing agent and sulfur dioxide in the flue gas and then carrying out gas-solid separation by using a bag-type dust remover.
Specifically, the steel slag activity excitant consists of 5 parts of desulfurized gypsum, 3 parts of alkaline residue and 1.5 parts of desulfurized ash.
A preparation method of the steel slag activity excitant comprises the following steps: the desulfurized gypsum, the alkaline residue or/and the fly ash are crushed to the specific surface area of 450m2More than kg. Specifically, the desulfurized gypsum, the desulfurized fly ash and/or the alkaline residue may be pulverized and mixed, or the desulfurized gypsum, the desulfurized fly ash and/or the alkaline residue may be pulverized and mixed.
The application method of the steel slag activity excitant comprises the following steps: mixing with steel slag; can be mixed with hot steel slag or cold steel slag, and the temperature of the steel slag does not influence the excitation effect of the steel slag active exciting agent on the steel slag.
The steel slag active exciting agent is prepared from 3-14 parts of steel slag: 86-97 parts of steel slag; the parts are parts by mass.
The application also provides an active steel slag excited by the steel slag excitant.
An active steel slag comprises 97-86 parts of steel slag and 3-14 parts of the steel slag active exciting agent; the parts are parts by mass; the steel slag is powdery, and the specific surface area of the steel slag is 450m2More than kg.
Optionally:
an active steel slag, which is prepared from steel slag,
consists of 97 to 88 parts of steel slag, 2 to 7 parts of desulfurized gypsum and 1 to 5 parts of alkaline residue; or,
consists of 96 to 86 parts of steel slag, 2 to 7 parts of desulfurized gypsum, 1 to 5 parts of alkaline residue and 0.1 to 2 parts of desulfurized ash;
the parts are parts by mass.
In particular, the method comprises the following steps of,
an active steel slag comprises 90 parts of steel slag, 6.25 parts of desulfurized gypsum and 3.75 parts of alkaline residue; or,
the steel slag desulfurization agent consists of 90 parts of steel slag, 5.26 parts of desulfurization gypsum, 3.16 parts of alkaline residue and 1.58 parts of desulfurization ash;
the parts are parts by mass.
Advantageous effects
The steel slag activity excitant provided by the application has the advantages of simple formula and good excitation effect; solves the contradiction between the complex degree of the formula of the steel slag activity excitant and the excitation activity.
In the steel slag activity excitant, the alkaline residue, the desulfurized gypsum and the desulfurized ash generate a synergistic effect, so that the active steel slag powder of the steel slag after the excitant is added has high activity; the concrete expression is as follows: compared with the steel slag cement without the exciting agent (the steel slag mass content is 30%), the steel slag cement (the steel slag mass content is 30%) added with the exciting agent has the flexural strength respectively improved by 30-86%, 22-53% and 21-54% in 3 days, 7 days and 28 days; the compressive strength is respectively improved by 20-107%, 13-62% and 25-50% in 3 days, 7 days and 28 days; the activity indexes of 3 days, 7 days and 28 days are respectively improved by 38-90%, 33-44% and 25-32%.
In addition, the steel slag activity excitant provided by the application is low in cost, simple in preparation method and suitable for industrial production; does not contain organic matters and can not generate environmental pollution.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents, instruments or equipment used are not indicated by manufacturers, and are all conventional products commercially available. The cement described in the examples and tables below is reference cement No. 42.5. The alkaline residue is the waste residue discharged in the process of preparing alkali by an ammonia-soda process; from a soda plant. The desulfurization ash is a dry desulfurization byproduct obtained by using quicklime (cao) as a desulfurizing agent, evaporating water in the desulfurizing agent or spraying atomized water into a desulfurizing tower by using sensible heat of flue gas, reducing the temperature of the flue gas instantaneously and greatly increasing the relative humidity, carrying out chemical reaction on the desulfurizing agent and sulfur dioxide in the flue gas, and then carrying out gas-solid separation by using a bag-type dust remover. From steel plant coke plants or power plants.
Preparation of the exciting agent
Example 1.1
Taking 2kg of desulfurized gypsum and 1kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent with the components of 2kg of desulfurized gypsum and 1kg of alkaline residue.
Example 1.2
Taking 7kg of desulfurized gypsum and 5kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 7kg of desulfurized gypsum and 5kg of alkaline residue.
Example 1.3
Taking 7kg of desulfurized gypsum and 1kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 7kg of desulfurized gypsum and 1kg of alkaline residue.
Example 1.4
Taking 2kg of desulfurized gypsum and 5kg of alkaline residue as raw materials, and mixing; however, the device is not suitable for use in a kitchenAfter-crushing to a specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent with the components of 2kg of desulfurized gypsum and 5kg of alkaline residue.
Example 1.5
Taking 5kg of desulfurized gypsum and 3kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 5kg of desulfurized gypsum and 3kg of alkaline residue.
Example 2.1
Taking 5kg of desulfurized gypsum, 0.1kg of desulfurized ash and 3kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 5kg of desulfurized gypsum, 0.1kg of desulfurized ash and 3kg of alkaline residue.
Example 2.2
Taking 5kg of desulfurized gypsum, 0.5kg of desulfurized ash and 3kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 5kg of desulfurized gypsum, 0.5kg of desulfurized ash and 3kg of alkaline residue.
Example 2.3
Taking 5kg of desulfurized gypsum, 1.0kg of desulfurized ash and 3kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 5kg of desulfurized gypsum, 1.0kg of desulfurized ash and 3kg of alkaline residue.
Example 2.4
Taking 5kg of desulfurized gypsum, 1.5kg of desulfurized ash and 3kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 5kg of desulfurized gypsum, 1.5kg of desulfurized ash and 3kg of alkaline residue.
Example 2.5
Taking 5kg of desulfurized gypsum, 2.0kg of desulfurized ash and 3kg of alkaline residue as raw materials, and mixing; then pulverizing to specific surface area of 450m2More than kg of the active exciting agent is the steel slag active exciting agent which comprises 5kg of desulfurized gypsum, 2.0kg of desulfurized ash and 3kg of alkaline residue.
Example 3
Taking 5kg of desulfurized gypsum and crushing the desulfurized gypsum into powder with the specific surface area of 450m2Over/kg, obtaining desulfurized gypsum powder;
1.5kg of desulfurized fly ash is taken and crushed into the specific surface area of 450m2Over/kg, obtaining desulfurized fly ash;
3kg of caustic sludge is taken and crushed to the specific surface area of 450m2Over/kg, obtaining alkali slag powder;
mixing the sulfur gypsum powder, the desulfurization ash powder and the alkali slag powder to obtain the steel slag activity excitant.
Preparation of reactive steel slag
Example 4
The exciting agent prepared in example 1.1 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain 1.1 of active steel slag;
the exciting agent prepared in example 1.2 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain 1.2 of active steel slag;
the exciting agent prepared in example 1.3 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain 1.3 of active steel slag;
the exciting agent prepared in example 1.4 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain 1.4 of active steel slag;
the exciting agent prepared in example 1.5 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain 1.5 of active steel slag;
the exciting agent prepared in example 2.1 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain active steel slag 2.1;
the exciting agent prepared in example 2.2 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain active steel slag 2.2;
the exciting agent prepared in example 2.3 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain active steel slag 2.3;
the excitant prepared in the example 2.4 and the normal temperature steel are mixed according to the mass ratio of 3:97Slag powder (specific surface area 450 m)2Over kg) to obtain active steel slag 2.4A;
the exciting agent prepared in example 2.5 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain active steel slag 2.5;
the exciting agent prepared in example 3 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 3:972Over kg) to obtain active steel slag 3;
the exciting agent prepared in example 2.4 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 10:902Over kg) to obtain active steel slag 2.4B;
the exciting agent prepared in example 2.4 and normal temperature steel slag powder (the specific surface area is 450 m) are mixed according to the mass ratio of 14:862Over kg) to obtain active steel slag 2.4C.
Preparation of active steel slag cement
Example 5
The activated steel slag prepared in the example 4 is mixed with cement according to the mass ratio of 1:1 respectively to obtain the corresponding steel slag cement of 1.1-2.4C.
The activated steel slag prepared in the embodiment 4 is mixed with cement according to the mass ratio of 27:63 respectively to obtain the corresponding steel slag cement 1.1 '-2.4C'.
Effect test
Comparative example 1
Crushing the desulfurized gypsum to the specific surface area of 450m2A trigger D1 of not less than kg;
mixing an exciting agent D1 with normal-temperature steel slag according to the mass ratio of 3:97 to obtain active steel slag D1.1;
mixing an exciting agent D1 with normal-temperature steel slag according to the mass ratio of 10:90 to obtain active steel slag D1.2;
and mixing the exciting agent D1 with the normal-temperature steel slag according to the mass ratio of 14:86 to obtain the active steel slag D1.3.
Mixing the activated steel slag D1.1, the activated steel slag D1.2 and the activated steel slag D1.3 with cement according to the mass ratio of 1:1 respectively to obtain corresponding steel slag cement D1.1-D1.3.
Mixing the activated steel slag D1.1, the activated steel slag D1.2 and the activated steel slag D1.3 with cement according to the mass ratio of 27:63 respectively to obtain corresponding steel slag cement D1.1 '-D1.3'.
Comparative example 2
The desulfurized ash is crushed to the specific surface area of 450m2A trigger D2 of not less than kg;
mixing an exciting agent D2 with normal-temperature steel slag according to the mass ratio of 3:97 to obtain active steel slag D2.1;
mixing the exciting agent D2 with the normal-temperature steel slag according to the mass ratio of 10:90 to obtain active steel slag D2.2;
and mixing the exciting agent D2 with the normal-temperature steel slag according to the mass ratio of 14:86 to obtain the active steel slag D2.3.
Mixing the activated steel slag D2.1, the activated steel slag D2.2 and the activated steel slag D2.3 with cement according to the mass ratio of 1:1 respectively to obtain the corresponding steel slag cement D2.1-D2.3.
Mixing the activated steel slag D2.1, the activated steel slag D2.2 and the activated steel slag D2.3 with cement according to the mass ratio of 27:63 respectively to obtain the corresponding steel slag cement D2.1 '-D2.3'.
Comparative example 3
Crushing the caustic sludge to 450m of specific surface area2More than kg; as activator D3.
Mixing an exciting agent D3 with normal-temperature steel slag according to the mass ratio of 3:97 to obtain active steel slag D3.1;
mixing the exciting agent D3 with the normal-temperature steel slag according to the mass ratio of 10:90 to obtain active steel slag D3.2;
and mixing the exciting agent D3 with the normal-temperature steel slag according to the mass ratio of 14:86 to obtain the active steel slag D3.3.
Mixing the activated steel slag D3.1, the activated steel slag D3.2 and the activated steel slag D3.3 with cement according to the mass ratio of 1:1 respectively to obtain the corresponding steel slag cement D3.1-D3.3.
Mixing the activated steel slag D3.1, the activated steel slag D3.2 and the activated steel slag D3.3 with cement according to the mass ratio of 27:63 respectively to obtain the corresponding steel slag cement D3.1 '-D3.3'.
Comparative example 4
Mixing the steel slag and the cement according to the mass ratio of 27:63 to obtain the corresponding steel slag cement D4.
Effect test
The flexural strength test method comprises the following steps: GB/T17671-1999;
the method for testing the compressive strength comprises the following steps: GB/T17671-1999;
the activity index is the ratio of the compressive strength of the sample to the compressive strength of the comparative cement.
The results are shown in the following table
In the table.The compressive strength, the flexural strength and the activity index of D1.1-D1.3, D1.1'-D1.3', D2.1-D2.3, D2.1'-D2.3', D3.1-D3.3, D4.1-D4.3 and D4.1'-D4.3' are average values.
Claims (10)
1. The steel slag active exciting agent is characterized by comprising 2-7 parts by mass of desulfurized gypsum and 1-5 parts by mass of alkaline residue, wherein the desulfurized gypsum and the alkaline residue are both in powder form, and the specific surface area of the desulfurized gypsum and the alkaline residue is 450m2More than kg; the alkaline residue is the waste residue discharged in the process of preparing alkali by an ammonia-soda process.
2. The steel slag activity stimulant as set forth in claim 1, which is characterized by comprising 0.1 to 2 parts of desulfurized fly ash; the desulfurization ash is powdery, and the specific surface area of the desulfurization ash is 450m2More than kg; the desulfurization ash is a dry desulfurization byproduct obtained by using quick lime as a desulfurizing agent, evaporating water in the desulfurizing agent or spraying atomized water into a desulfurizing tower by using sensible heat of flue gas, reducing the temperature of the flue gas instantaneously and greatly increasing the relative humidity, and carrying out chemical reaction on the desulfurizing agent and sulfur dioxide in the flue gas and then carrying out gas-solid separation by using a bag-type dust remover.
3. The steel slag activity excitant of claim 1, comprising desulfurized gypsum 2-7 weight portions and caustic sludge 1-5 weight portions.
4. The steel slag activity stimulant as set forth in claim 1, which is composed of 5 parts of desulfurized gypsum and 3 parts of caustic sludge.
5. The steel slag activity excitant of claim 2, which consists of desulfurized gypsum 2-7 parts, caustic sludge 1-5 parts and desulfurized ash 0.1-2 parts.
6. The steel slag activity excitant of claim 2, which consists of 5 parts of desulfurized gypsum, 3 parts of caustic sludge and 1.5 parts of desulfurized ash.
7. A method for preparing the steel slag activator according to any one of claims 1 to 6, which comprises the following steps: the desulfurized gypsum, the alkaline residue or/and the fly ash are crushed to the specific surface area of 450m2More than kg.
8. An active steel slag, which is characterized by comprising 97 to 86 parts of steel slag and 3 to 14 parts of the steel slag active exciting agent of any one of claims 1 to 6; the parts are parts by mass; the steel slag is powdery, and the specific surface area of the steel slag is 450m2More than kg.
9. The activated steel slag according to claim 8, wherein,
consists of 97 to 88 parts of steel slag, 2 to 7 parts of desulfurized gypsum and 1 to 5 parts of alkaline residue; or,
consists of 96 to 86 parts of steel slag, 2 to 7 parts of desulfurized gypsum, 1 to 5 parts of alkaline residue and 0.1 to 2 parts of desulfurized ash.
10. The activated steel slag according to claim 8, wherein,
the steel slag desulfurization agent consists of 90 parts of steel slag, 6.25 parts of desulfurization gypsum and 3.75 parts of alkaline residue; or,
the steel slag desulfurization agent consists of 90 parts of steel slag, 5.26 parts of desulfurization gypsum, 3.16 parts of alkaline residue and 1.58 parts of desulfurization ash.
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