CN211170806U - Clean iron ore agglomeration system - Google Patents
Clean iron ore agglomeration system Download PDFInfo
- Publication number
- CN211170806U CN211170806U CN201921677601.0U CN201921677601U CN211170806U CN 211170806 U CN211170806 U CN 211170806U CN 201921677601 U CN201921677601 U CN 201921677601U CN 211170806 U CN211170806 U CN 211170806U
- Authority
- CN
- China
- Prior art keywords
- briquetting
- iron ore
- roasting
- briquettes
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 84
- 238000005054 agglomeration Methods 0.000 title description 28
- 230000002776 aggregation Effects 0.000 title description 28
- 239000000463 material Substances 0.000 claims abstract description 58
- 238000002156 mixing Methods 0.000 claims abstract description 48
- 239000000203 mixture Substances 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 19
- 239000004484 Briquette Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 15
- 235000020985 whole grains Nutrition 0.000 claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 57
- 230000008569 process Effects 0.000 claims description 30
- 239000000428 dust Substances 0.000 claims description 24
- 239000013590 bulk material Substances 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 14
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 35
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 20
- 239000007789 gas Substances 0.000 description 19
- 239000000843 powder Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 13
- 239000002956 ash Substances 0.000 description 12
- 235000019738 Limestone Nutrition 0.000 description 10
- 235000012255 calcium oxide Nutrition 0.000 description 10
- 239000000292 calcium oxide Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 239000006028 limestone Substances 0.000 description 10
- 235000019580 granularity Nutrition 0.000 description 9
- 239000002912 waste gas Substances 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 239000000571 coke Substances 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 7
- 239000004449 solid propellant Substances 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 238000001354 calcination Methods 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004698 iron complex Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model provides a clean iron ore briquetting system, wherein, clean iron ore briquetting system includes: the device comprises a batching device, a mixing device, a briquetting device, a screening device, a roasting device and a granulating device; the batching device is used for weighing iron ores and additives according to a set weight proportion so as to carry out batching; the mixing device is used for receiving the materials configured by the batching device and mixing the materials; the briquetting device is used for receiving the mixture in the mixing device and briquetting the mixture; the screening device is used for receiving briquettes in the briquetting device and screening the briquettes to obtain briquettes with a target size; the roasting device is used for roasting the briquette with the target size and cooling a product obtained after roasting; the whole grain device is used for receiving the product cooled after being roasted by the roasting device and grading the product to obtain a target product. The utility model provides a system energy consumption is low, and the pollutant emission is few, and the management is convenient.
Description
Technical Field
The utility model relates to a clean iron ore agglomeration system belongs to ferrous metallurgy technical field.
Background
The steel industry is a national important basic industry and is also a source industry with high energy consumption, high emission and increased environmental load. With the high-speed increase of steel production since the 21 st century, the environmental problems resulting therefrom have become more and more significant, in particular with SO-containing2、CO2And the pollution of the exhaust gas to the atmosphere is more concerned.
The technology innovation is strengthened, the environmental pollution is reduced, and the promotion of the high-efficiency utilization of energy is a necessary choice for the development of human society. In long-run steel and iron complex, 70% of the pollution comes from the iron front process, and more than 90% of S in the raw materials is removed in the iron ore agglomeration process, namely, the sintering and pelletizing process and enters the flue gas. Therefore, the sintering and pelletizing process is one of the important sources of pollution in steel plants.
Research shows that the carbon oxides discharged by sintering flue gas mainly come from sintering solid fuel, and account for more than 60 percent. And 25% of sulfur oxides in the flue gas are also from the combustion of solid fuel, and meanwhile, the nitrogen oxides and the solid fuel have a large relationship. In addition, the solid burnup contributes about 80% to the process energy consumption. Therefore, how to reduce the energy consumption and pollution during sintering is crucial to how to reduce the consumption of solid fuel during sintering.
Based on the above problems, it has become a technical problem to be solved in the art to provide a novel clean iron ore agglomeration system and method.
SUMMERY OF THE UTILITY MODEL
In order to solve the above disadvantages and shortcomings, an object of the present invention is to provide a clean iron ore agglomeration system.
To achieve the above object, the present invention provides a clean iron ore briquetting system, wherein the clean iron ore briquetting system comprises: the device comprises a batching device, a mixing device, a briquetting device, a screening device, a roasting device and a granulating device;
the batching device is used for weighing iron ores and additives according to a set weight proportion so as to carry out batching; the mixing device is used for receiving the materials configured by the batching device and mixing the materials; the briquetting device is used for receiving the mixture in the mixing device and briquetting the mixture; the screening device is used for receiving briquettes in the briquetting device and screening the briquettes to obtain briquettes with a target size; the roasting device is used for roasting the briquette with the target size and cooling a product obtained after roasting; the whole grain device is used for receiving the product cooled after being roasted by the roasting device and grading the product to obtain a target product.
According to the utility model discloses specific embodiment, preferably, clean iron ore agglomeration system still include dust collector for it is right to receive the waste gas of roasting equipment production in calcination process and remove dust to waste gas.
According to the utility model discloses specific embodiment clean iron ore agglomeration system in, preferably, dust collector still is used for sending the gained dust removal ash after removing dust to mixing arrangement, mixing arrangement still is used for receiving the dust removal ash to with its and iron ore and additive misce bene, in order to obtain the mixture.
According to the utility model discloses specific embodiment, preferably, clean iron ore agglomeration system still include main draught fan and chimney for the gas emission atmosphere that obtains after will removing dust.
According to the utility model discloses a specific embodiment clean iron ore agglomeration system in, preferably, dust collector is electric dust collector.
According to the utility model discloses a specific embodiment clean iron ore briquetting system in, preferably, screening plant still is arranged in receiving the briquetting in the briquetting device and sieves it, sends obtained size briquetting that is not in the target dimension scope to the briquetting device again, the briquetting device still is used for receiving the briquetting that the size is not in the target dimension scope to carry out the briquetting simultaneously with the mixture to it, in order to obtain target size briquetting.
According to an embodiment of the present invention, in the clean iron ore agglomeration system, preferably, the target size range is 5mm or more and less than 16 mm.
According to the utility model discloses specific embodiment clean iron ore briquetting system in, preferably, the calcination device still is arranged in sending bulk cargo and the ash that the calcination in-process fell to the briquetting device, the briquetting device still is used for receiving bulk cargo and ash to carry out the briquetting simultaneously to it and mixture, with the briquetting that obtains target size.
According to the specific embodiment of the present invention, in the clean iron ore agglomeration system, preferably, the granulating device is further configured to send the material with size <5mm obtained after granulating to the mixing device, and the mixing device is further configured to receive the material with size <5mm and then mix the material with iron ore and additives uniformly to obtain a mixture;
the whole grain device is also used for sending the materials with the size of 10mm-16mm obtained after the whole grain to the roasting device to be used as the bottom material for the roasting process.
According to the specific embodiment of the utility model, in the clean iron ore agglomeration system, the batching device, the mixing device, the briquetting device, the screening device, the roasting device, the granulating device and the dedusting device are all conventional devices used in the field;
as in the specific embodiment of the present invention, the batching device can be a weighing and batching apparatus, and the mixing device can be a blending apparatus; preferably, the batching device can be a weighing device such as a belt scale or a spiral scale; the mixing device can be a cylinder mixer, a vertical mixer or the like; the briquetting device can be a high-pressure briquetting machine or a hydraulic briquetting machine and the like.
The system can be applicable to the method of multiple difference and clean the iron ore agglomeration, it is further right the utility model discloses a system explains, the utility model discloses still provide and use the utility model discloses a system cleans the method of agglomeration to iron ore, the method includes following step:
(1) uniformly mixing the iron ore and the additive according to a set weight ratio to obtain a mixture;
(2) briquetting the mixture to obtain a briquette with a target size;
(3) roasting the briquettes, wherein the fuel used for roasting is clean coal gas or natural gas;
(4) and cooling the product obtained by roasting, and grading the product after cooling to obtain the target product.
According to the specific embodiment of the present invention, in the step (1), the present invention does not require specific components of the additive, and those skilled in the art can reasonably select the components of the additive according to the needs of the field operation; as in one embodiment of the present invention, the additives may include binders, fluxes, and the like;
in addition, the utility model does not have specific requirements on the specific dosage of the iron ore, the binder, the flux and the like used in the step (1), and the dosage range of the raw material components can be reasonably set by technical personnel in the field according to the field operation requirement; in one embodiment of the present invention, the iron ore is used in a mass ratio of about 80 to 95%, the flux is used in a mass ratio of 5 to 10%, and the binder is used in a mass ratio of 0 to 5%, based on 100% by weight of the total weight of the raw materials.
According to a specific embodiment of the present invention, in the method, in the step (2), the briquette of the target size is a briquette of a size (particle size) of 8mm to 16mm, the briquette has a compressive strength in the range of 5N/piece to 10N/piece and a drop strength >3 times/0.5 m.
In a specific embodiment of the present invention, the particle size range of the briquette may be 8mm to 12 mm.
In addition, the shape of the briquetting block is not specifically required, and the shape can be reasonably set by a person skilled in the art according to the field operation requirement, so long as the aim of the utility model can be achieved; for example, in embodiments of the present invention, the briquette may have a round ball shape, a cylindrical shape, or a square shape.
According to the specific embodiment of the present invention, in the step (3), the temperature range of the calcination is 1100-1300 ℃, and the calcination time range is 5-20 min.
According to the specific embodiment of the present invention, in the step (3), the present invention does not have specific requirements for the clean gas used, and the skilled in the art can select the proper clean gas according to the actual operation requirement in the field, as long as the purpose of the present invention can be achieved; as in a specific embodiment of the present invention, the clean gas may be coke oven gas or mixed gas.
According to a specific embodiment of the present invention, in the method, in the step (4), the size of the target product is greater than or equal to 5mm and less than 16 mm.
According to a specific embodiment of the present invention, the method further comprises: and (3) mixing the briquettes with the size out of the target size range obtained in the step (2) with the mixture, and then briquetting to obtain briquettes with the target size.
According to a specific embodiment of the present invention, the method further comprises: and (4) mixing the bulk materials and the ash falling in the roasting process in the step (3) with the mixture, and then briquetting to obtain the briquettes with the target size.
According to a specific embodiment of the present invention, the method further comprises: dedusting the production waste gas obtained in the roasting process in the step (3), and uniformly mixing the dedusting ash obtained after dedusting with iron ore and additives to obtain a mixture; and then discharging the gas obtained after dust removal into the atmosphere.
Wherein, in the specific embodiment of the present invention, the dust removal may be electric dust removal.
According to a specific embodiment of the present invention, the method further comprises: uniformly mixing the material (return fines) with the size of less than 5mm obtained after finishing the particles with iron ore and an additive to obtain a mixture;
and (3) using the material with the size of 10-16 mm obtained after the size stabilization as a bottom material in the roasting process.
The utility model provides a this clean iron ore agglomeration method is applicable to the iron ore of different granularities, no matter is the iron ore concentrate that the granularity is 0-1mm, still is the iron ore powder that the granularity is 0-8mm, only to the iron ore of different granularities, need choose for use different additives and set up different briquetting pressures.
The utility model does not change the raw material system used by the prior iron ore agglomeration, but changes the fuel system used by the prior iron ore agglomeration, does not adopt the solid fuels such as coke powder, coal powder (such as anthracite) and the like which have higher sulfur and nitrogen content and can cause a large amount of pollution, and adopts the coal gas or natural gas with cleaner high calorific value, thereby obviously reducing the emission of pollutants in the agglomeration process; the iron ore agglomeration method provided by the utility model has the advantages of low energy consumption, convenient management and high yield, and the product prepared by the method is suitable for blast furnace smelting and meets the structural requirement of furnace charge; particularly, compared with the traditional sintering process, the clean iron ore agglomeration method provided by the utility model can reduce the energy consumption by about 10-30 percent and reduce the emission of SO2About 20%, and can also greatly reduce NOXAnd the qualified blast furnace raw materials can be produced simultaneously, the problems caused by matching use of sinter and pellet in the blast furnace are avoided, and the iron making by using full-cooked materials can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a clean iron ore agglomeration system according to an embodiment of the present invention.
Fig. 2 is a specific process flow diagram of a clean iron ore agglomeration method according to an embodiment of the present invention.
The main reference numbers illustrate:
1. a dosing device;
2. a mixing device;
3. a briquetting device;
4. a screening device;
5. a roasting device;
6. a granulating device;
7. an electric dust removal device;
8. a main induced draft fan;
9. and (4) a chimney.
Detailed Description
The following detailed description of the embodiments and the advantageous effects thereof will be provided by way of specific examples and accompanying drawings, which are provided to assist the reader in better understanding the nature and features of the present invention, and are not intended to limit the scope of the present invention.
Example 1
The embodiment provides a clean iron ore agglomeration system, wherein the structural schematic diagram of the system is shown in fig. 1, and as can be seen from fig. 1, the system comprises a batching device 1, a mixing device 2, a briquetting device 3, a screening device 4, a roasting device 5, a granulating device 6 and an electric dust removal device 7;
the batching device 1 comprises an iron ore batching unit, a flux batching unit and a binder batching unit, and is specifically used for weighing iron ore, flux and binder according to a set weight proportion so as to carry out batching;
the mixing device 2 is used for receiving the materials configured by the batching device and mixing the materials;
the briquetting device 3 is used for receiving the mixture in the mixing device and briquetting the mixture;
the screening device 4 is used for receiving briquettes in the briquetting device and screening the briquettes to obtain briquettes with a target size; the screening device 4 is also used for sending the obtained briquettes with the size out of the target size range to the briquetting device 3, and the briquetting device 3 is also used for receiving the briquettes with the size out of the target size range and briquetting the briquettes and the mixture to obtain briquettes with the target size;
the roasting device 5 comprises a material distribution unit, a roasting unit and a cooling unit; the device is used for roasting the briquette with the target size and cooling a product obtained after roasting; the roasting device 5 is also used for conveying the bulk materials and the ashes falling in the roasting process to the briquetting device 3, and the briquetting device 3 is also used for receiving the bulk materials and the ashes and simultaneously briquetting the bulk materials and the mixture to obtain a briquette with a target size;
wherein, the roasting unit adopts a gas burner for heating, and the cooling unit adopts an air cooling facility for cooling;
the whole grain device 6 is used for receiving the product cooled after being roasted by the roasting device 5 and grading the product to obtain a target product; the whole grain device 6 is also used for sending the material with the size of less than 5mm obtained after whole grain to the mixing device 2, and the mixing device 2 is also used for receiving the material with the size of less than 5mm and then uniformly mixing the material with iron ore and additives to obtain a mixture;
the whole grain device 6 is also used for sending the material with the size of 10mm-16mm obtained after the whole grain to the roasting device 5 to be used as a bottom material for the roasting process;
the electric dust removal device 7 is used for receiving the production waste gas generated by the roasting device 5 in the roasting process and performing electric dust removal on the production waste gas;
in addition, in this embodiment, the system further includes a main induced draft fan 8 and a chimney 9, which are used for discharging the gas obtained after dust removal into the atmosphere.
Example 2
The present example provides a clean iron ore briquetting method using the clean iron ore briquetting system provided in example 1, wherein the process flow diagram of the method is shown in fig. 2, and as can be seen from fig. 2, the method comprises the following steps:
preparing materials: iron ore powder with the granularity of 1mm-8mm accounting for 90 percent (mass fraction) is selected as a main raw material for production, and fine-grained limestone and quicklime powder with the granularity of less than 0.074mm accounting for 80 percent (mass fraction) are adopted as a fusing agent; wherein the mass ratio of the iron ore powder, the limestone and the quicklime is respectively 88%, 5% and 7% by taking the total mass of the iron ore powder, the limestone and the quicklime as 100%;
mixing: uniformly mixing iron ore powder, limestone and quicklime to obtain a mixture;
briquetting: briquetting the mixture to obtain briquettes with the target size (the size is 8-16 mm); mixing the obtained briquetting blocks with the sizes out of the target size range with the mixture, and then briquetting to obtain the briquetting blocks with the target sizes;
roasting: conveying the briquettes to a material distribution unit of a roasting device, loading the briquettes on a trolley paved with bedding materials through the material distribution unit, running the trolley to a roasting unit of a roasting system for roasting, and providing a heat source (with the heat value of 4000 kcal/Nm) by adopting coke oven gas combustion in the roasting process3The coal gas consumption is 75.6m3/tTarget product) The temperature of a hearth is guaranteed to be 1150 ℃ by coke oven gas combustion, the material retention time is 15 minutes, after roasting is completed, the trolley runs to a cooling unit, cooling is carried out through air cooling, and the roasted material is subjected to heat preservation through cooling high-temperature waste gas;
mixing the bulk material and ash falling in the roasting process with the mixture, and then briquetting to obtain a briquette with a target size;
carrying out electric precipitation on the production waste gas obtained in the roasting process, and uniformly mixing the precipitation ash obtained after electric precipitation with iron ore powder, limestone and quicklime to obtain a mixture; then discharging the gas obtained after electric precipitation into the atmosphere;
straightening: grading the obtained product after cooling, wherein the material with the size of less than 5mm obtained after grading returns to the batching device to be batched again; and (3) feeding the materials with the size of 10-16 mm into a bedding material conveying system, returning the materials to the distributing unit to be used as a bedding material in the roasting process, and feeding the materials with other particle sizes (the size is more than or equal to 5mm and less than 10mm) into a finished product system, wherein the materials are finished products.
In this example, the yield of the final product was 85.2%, the drum strength was 68.5%, and the basicity (Ca/Si) of the finished product was 1.85; the energy consumption of the finished ore per ton is 47.10kgce/t (no waste heat utilization), and the finished ore per ton SO2The discharge amount was about 79 kg.
Example 3
The present example provides a clean iron ore briquetting method using the clean iron ore briquetting system provided in example 1, wherein the process flow diagram of the method is shown in fig. 2, and as can be seen from fig. 2, the method comprises the following steps:
preparing materials: iron ore concentrate with the granularity of less than 0.1mm accounting for 70 percent (mass fraction) is selected as a main raw material for production, and fine-grained limestone and quicklime powder are adopted as a fusing agent, and the granularity of less than 0.074mm accounting for 80 percent (mass fraction); wherein the mass ratios of the iron ore concentrate, the limestone and the quicklime are respectively 95%, 2% and 3% by taking the total mass of the iron ore concentrate, the limestone and the quicklime as 100%;
mixing: uniformly mixing iron ore powder, limestone and quicklime to obtain a mixture;
briquetting: briquetting the mixture to obtain briquettes with the target size (the size is 8-16 mm); mixing the obtained briquetting blocks with the sizes out of the target size range with the mixture, and then briquetting to obtain the briquetting blocks with the target sizes;
roasting: conveying the briquettes to a material distribution unit of a roasting device, loading the briquettes on a trolley paved with bedding materials through the material distribution unit, running the trolley to a roasting unit of a roasting system for roasting, and providing a heat source (with the heat value of 4000 kcal/Nm) by adopting coke oven gas combustion in the roasting process3The coal gas consumption is 57.2m3/tTarget product) The coke oven gas combustion ensures that the hearth temperature is 1150 ℃, the material retention time is 15 minutes, after the roasting is finished, the trolley runs to a cooling unit, the cooling is carried out through air cooling, and the high temperature is cooledThe waste gas is used for preserving the heat of the roasted material;
mixing the bulk material and ash falling in the roasting process with the mixture, and then briquetting to obtain a briquette with a target size;
carrying out electric precipitation on the production waste gas obtained in the roasting process, and uniformly mixing the precipitation ash obtained after electric precipitation with iron ore powder, limestone and quicklime to obtain a mixture; then discharging the gas obtained after electric precipitation into the atmosphere;
straightening: grading the obtained product after cooling, wherein the material with the size of less than 5mm obtained after grading returns to the batching device to be batched again; and (3) feeding the materials with the size of 10-16 mm into a bedding material conveying system, returning the materials to the distributing unit to be used as a bedding material in the roasting process, and feeding the materials with other particle sizes (the size is more than or equal to 5mm and less than 10mm) into a finished product system, wherein the materials are finished products.
In this example, the yield of the final product was 80.4%, the drum strength was 62.3%, and the basicity (Ca/Si) of the finished product was 1.3; the energy consumption of the finished ore per ton is 38.62kgce/t (no waste heat utilization), and the finished ore per ton SO2The discharge amount was about 106 kg.
Comparative example 1
In this comparative example, the same raw materials as those used in example 2 were used and the conventional sintering process was used, i.e., coke powder was used as a solid fuel in an amount of 44.5kg/tTarget productThe coke oven gas is adopted for ignition, and the heat value is 4000kcal/Nm3The coal gas consumption is 5.05m3/tTarget productThe roasting temperature is 1150 ℃, and after the roasting is finished, the target product is obtained after cooling and screening.
In the comparative example, the yield of the final product was 77.6%, the drum strength was 74.3%, and the finished product basicity (Ca/Si) was 1.85; the energy consumption of the finished product of the ton ore is 52.43kgce/t (no waste heat utilization), and the finished product of the ton ore is sintered ore SO2The discharge amount was 92 kg.
Comparing the example 2 with the comparative example 1, the clean iron ore agglomeration method provided by the utility model can reduce the energy consumption by 10.17 percent and reduce the SO content by 10.17 percent2The displacement reduction was 16.46%.
Comparative example 2
Since the proportion of the fine iron powder used in example 3 was too high, the normal production could not be carried out. In the comparative example, the mass ratio of the iron ore concentrate (calculated by taking the total mass of the iron ore concentrate and the iron ore powder as 100%) is adjusted to 50%, 50 wt% (calculated by taking the total mass of the iron ore concentrate and the iron ore powder as 100%) of iron ore powder with the granularity of 1mm-8mm is added at the same time, the traditional sintering process is adopted for production, namely, coke powder is used as solid fuel for production, and the consumption of the coke powder is 47.8kg/tTarget productThe coke oven gas is adopted for ignition, the heat value is 4000kcal/Nm3, and the gas consumption is 5.05m3/tTarget productThe roasting temperature is 1150 ℃, and after the roasting is finished, the target product is obtained after cooling and screening.
In the comparative example, the yield of the final product is 74.2%, the drum strength is 65.7%, and the finished product alkalinity (Ca/Si) is 1.85; the energy consumption of ore finished products per ton is 55.6kgce/t (no waste heat utilization), and the energy consumption per ton of finished ore SO2The discharge amount was about 132 kg.
Comparing the embodiment 3 with the comparative example 2, the clean iron ore agglomeration method provided by the utility model can reduce the energy consumption by 30.6 percent and reduce the SO content by 30.6 percent2The displacement reduction was 19.7%.
From the embodiment 2-the embodiment 3 and the comparative example 1-the comparative example 2, on the premise of obtaining the same product, the clean iron ore agglomeration method provided by the utility model has lower energy consumption and less pollutant discharge, and the method is a practical and effective new method for clean production of iron ore agglomeration.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent.
Claims (10)
1. A clean iron ore briquetting system, characterized in that it comprises: the device comprises a batching device, a mixing device, a briquetting device, a screening device, a roasting device and a granulating device;
the batching device is used for weighing iron ores and additives according to a set weight proportion so as to carry out batching; the mixing device is used for receiving the materials configured by the batching device and mixing the materials; the briquetting device is used for receiving the mixture in the mixing device and briquetting the mixture; the screening device is used for receiving briquettes in the briquetting device and screening the briquettes to obtain briquettes with a target size; the roasting device is used for roasting the briquette with the target size and cooling a product obtained after roasting; the whole grain device is used for receiving the product cooled after being roasted by the roasting device and grading the product to obtain a target product.
2. The clean iron ore briquetting system of claim 1, further comprising a dust removal device for receiving and removing process off-gas generated by the roasting device during the roasting process.
3. The clean iron ore briquetting system of claim 2, wherein said dust removing device is further configured to send the obtained dust to said mixing device, and said mixing device is further configured to receive said dust and mix it with iron ore and additives to obtain a mixture.
4. The clean iron ore briquetting system of claim 2 or 3, further comprising a main induced draft fan and a chimney for exhausting the gas obtained after dust removal into the atmosphere.
5. The clean iron ore briquetting system of claim 2 or 3, wherein the dust removal device is an electric dust removal device.
6. The clean iron ore briquetting system of claim 1, wherein the screening device is further configured to receive briquettes in the briquetting device and screen the briquettes, and send the briquettes with the size out of the target size range to the briquetting device, and the briquetting device is further configured to receive the briquettes with the size out of the target size range and briquette the briquettes with the mixture to obtain briquettes with the target size.
7. The clean iron ore briquetting system of claim 6, wherein said target size range is 5mm or greater and 16mm or less.
8. The clean iron ore briquetting system of claim 1, wherein the roasting apparatus is further configured to send the falling bulk material and ash to the briquetting apparatus, and the briquetting apparatus is further configured to receive the bulk material and ash and simultaneously briquette them with the mixed material to obtain briquettes of a target size.
9. The clean iron ore briquetting system of claim 1, wherein said pelletizing means is further configured to send the resulting sized <5mm material to said mixing means, said mixing means is further configured to receive said sized <5mm material and mix it with iron ore and additives to obtain a mix;
the whole grain device is also used for sending the materials with the size of 10mm-16mm obtained after the whole grain to the roasting device to be used as the bottom material for the roasting process.
10. The clean iron ore briquetting system of claim 1, wherein said batching device is a belt scale or screw scale; the mixing device is a cylinder mixer or a vertical mixer; the briquetting device is a high-pressure briquetting machine or a hydraulic briquetting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921677601.0U CN211170806U (en) | 2019-10-09 | 2019-10-09 | Clean iron ore agglomeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921677601.0U CN211170806U (en) | 2019-10-09 | 2019-10-09 | Clean iron ore agglomeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211170806U true CN211170806U (en) | 2020-08-04 |
Family
ID=71794189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921677601.0U Active CN211170806U (en) | 2019-10-09 | 2019-10-09 | Clean iron ore agglomeration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211170806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626335A (en) * | 2019-10-09 | 2021-04-09 | 中冶京诚工程技术有限公司 | Clean iron ore agglomeration method and system |
-
2019
- 2019-10-09 CN CN201921677601.0U patent/CN211170806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626335A (en) * | 2019-10-09 | 2021-04-09 | 中冶京诚工程技术有限公司 | Clean iron ore agglomeration method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104109755B (en) | A kind of dedusting ash is colded pressing metal pelletizing production system and method | |
| CN108796217B (en) | Device and method for recycling zinc-containing and iron-containing dust mud | |
| CN102994680A (en) | Controllable atmosphere rotary hearth furnace process for producing direct reduction iron | |
| CN107779534B (en) | Process for treating zinc-containing and iron dust and mud in iron and steel plant by shaft furnace method | |
| CN111910072A (en) | Preparation and use methods of pre-reduced fluxed pellets with steel slag as partial raw material | |
| CN109055731B (en) | Dust granulation process and iron ore sintering process | |
| CN109207739A (en) | A kind of method of resource utilization zinc-containing metallurgy dust production iron-smelting furnace charge | |
| CN104131127B (en) | RKEF technique nickel-iron smelting residual-heat utilization method | |
| CN109355448B (en) | Smelting process for large blast furnace with high-proportion low-silicon high-magnesium fluorine-containing fluxing pellets | |
| CN103952540B (en) | Ion dust mud contaning and high silicon iron concentrate is utilized to produce the technique of prereduced burden | |
| CN104278145A (en) | Method for producing sintering ore | |
| CN108502884A (en) | A method of producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification | |
| CN211170806U (en) | Clean iron ore agglomeration system | |
| CN102994679A (en) | Method and equipment for producing high-quality sponge iron for reduced iron powder | |
| CN102839281A (en) | Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction | |
| CN204022910U (en) | A kind of dedusting ash is colded pressing metal pelletizing production system | |
| AU2022200483B1 (en) | Method for recovering valuable metal from high-zinc and high-lead smelting slag | |
| CN114540617A (en) | Preparation method and application method of redox briquetting of converter fly ash | |
| CN1940092A (en) | Fuse reducing iron-smelting process for rotating furnace | |
| CN112626335A (en) | Clean iron ore agglomeration method and system | |
| CN110592304B (en) | Iron ore powder pretreatment process | |
| CN112094968A (en) | Recycling method of gravity dedusting ash | |
| CN220579348U (en) | Phosphorite shaft furnace roasting production system | |
| CN111893296B (en) | Hot-pressed scrap steel carburetion method and device thereof | |
| CN113801992A (en) | Sintering digestion method of municipal sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |