CN108004392B - Sintering equipment and process for reducing burning up of sintered solid - Google Patents
Sintering equipment and process for reducing burning up of sintered solid Download PDFInfo
- Publication number
- CN108004392B CN108004392B CN201810127360.6A CN201810127360A CN108004392B CN 108004392 B CN108004392 B CN 108004392B CN 201810127360 A CN201810127360 A CN 201810127360A CN 108004392 B CN108004392 B CN 108004392B
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- Prior art keywords
- bin
- sintering
- return
- sintered
- mineral aggregate
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- 238000005245 sintering Methods 0.000 title claims abstract description 75
- 239000007787 solid Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title abstract description 14
- 230000008569 process Effects 0.000 title abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 122
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 45
- 239000011707 mineral Substances 0.000 claims abstract description 45
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 18
- 239000002344 surface layer Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 13
- 239000000446 fuel Substances 0.000 abstract description 8
- 238000005204 segregation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 5
- 238000005338 heat storage Methods 0.000 abstract description 3
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 239000004449 solid propellant Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
Abstract
The invention relates to sintering equipment for reducing the burn-up of sintered solids, which comprises a circular cooler, a crusher, a mixing bin, a distributor, a sintering trolley, a classifying vibrating screen, a return mineral bin and a feeder, wherein the mixing bin, the distributor and the sintering trolley are sequentially arranged from top to bottom, the return mineral bin is positioned above the distribution track of the distributor, the materials screened by the classifying vibrating screen are divided into three particle sizes of +5mm, 3-5mm and-3 mm, a conveying device is arranged between a material outlet of the particle size of 3-5mm and a material inlet of the return mineral bin, and a feeder is arranged below a material outlet of the return mineral bin. According to the invention, the classifying vibrating screen and the return mineral bin are arranged, 3-5mm particles in the sintered return mineral are screened out, and are reasonably distributed at the middle lower part of the sintered material layer in a dry material form through the material swinging device, so that the content segregation of fuel at the upper and lower parts of the sintered material layer is caused, and the sintering heat storage effect is fully utilized; meanwhile, the wet capacity of the lower material layer is increased, the air permeability of the lower material layer is improved, the return ore quantity in the sintered mixture is reduced, and the mixing and granulating process efficiency of the mixture is improved.
Description
Technical Field
The invention relates to the technical field of metallurgical sintering, in particular to sintering equipment and a sintering process for reducing the burnup of sintered solids.
Background
The sinter is the main iron-containing raw material for blast furnace smelting in China, and the sinter is obtained by mixing iron ore powder, flux and fuel and then feeding the mixture into a sintering machine for sintering. The burning up of the sintered solid is always the research focus of sintering workers, various different sintering distribution methods are developed based on the heat accumulation principle of sintering so as to lead the upper part and the lower part of a sintering material layer to form fuel segregation, and the lower part fuel content is reduced, but the effect is not very good. Meanwhile, the sintering burn-up is also influenced by the sintering yield, too much sintering return ore influences the sintering burn-up, at present, the sintering return ore with the diameter of-5 mm is directly returned to the raw material proportioning link of sintering in a sintering plant, and the large-particle sintering return ore enters the mixing granulation again, so that the energy consumption of the granulation process is wasted, the sintering mixing and the granulation process burden are increased, the mixing granulation efficiency is reduced, meanwhile, the water absorption in the mixing granulation process is improved, the total water content of the material layer of the sintering trolley is increased by phase change, and the burn-up is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides sintering equipment and a sintering process for reducing the burnup of the sintering solid, so that the content segregation of the fuel on the upper part and the lower part of the sintering material layer is realized, and the sintering heat storage effect is fully utilized.
The invention provides sintering equipment for reducing sintering solid fuel consumption, which comprises a circular cooler, a crusher, a mixing bin, a distributor, a sintering trolley, a classifying vibrating screen, a return mineral bin and a conveying device, wherein the mixing bin, the distributor and the sintering trolley are sequentially arranged from top to bottom, the return mineral bin is positioned above a distribution track of the distributor, the materials screened by the classifying vibrating screen are divided into three particle sizes of +5mm, 3-5mm and-3 mm, the conveying device is arranged between a material outlet of the particle size of 3-5mm and a material inlet of the return mineral bin, and a material swinging device is arranged below a material outlet of the return mineral bin.
According to the scheme, the return mineral bin and the classifying vibrating screen are arranged, particles with the diameter of 3-5mm in the original sintered return mineral are screened out, the particles are sent into the return mineral bin through the conveying device, and then are distributed at the middle lower part of the sintered material layer in a dry material mode through the material swinging device, so that content segregation of fuel at the upper part and the lower part of the sintered material layer is caused, and the sintering heat accumulation effect is fully utilized.
As optimization, the discharge port of the return material bin is also provided with a material flow control device. The material flow control device controls the material flow quality of the material outlet of the ore returning bin, so that the material flow is better distributed at the middle lower part of the sinter bed.
Preferably, the material flow control device comprises a material flow plate which is inserted into the bin body of the return material bin and is obliquely arranged. The material flow control device of the preferred scheme has simple structure and convenient operation, and can realize the control of the material flow by pumping the position of the material flow plate.
As optimization, a feeding roller is arranged at the discharge hole of the mixing bin. The material flow at the outlet of the mixing bin can be better controlled by arranging the feeding roller, so that the corresponding relation between the material flows of the mixing bin and the material flow of the return bin can be conveniently mastered.
A sintering process for reducing the burnup of sintered solids comprises the following steps:
(1) Crushing the finished sintered ore by using a crusher, and cooling the crushed mineral aggregate by using a circular cooler;
(2) Feeding the mineral aggregate cooled by the annular cooler into a classifying vibrating screen, and screening the mineral aggregate into three particle sizes of +5mm, 3-5mm and-3 mm by the classifying vibrating screen;
(3) Feeding the mineral aggregate with the size of +5mm into a sintering finished product bin, feeding the mineral aggregate with the size of 3-5mm into a return mineral aggregate bin, and feeding the mineral aggregate with the size of-3 mm back into a sintering batching system;
(4) When the distributing device distributes materials, the material flow quality of the material outlet of the material returning bin is controlled below 8% of the material flow quality of the material outlet of the mixing bin, meanwhile, 3-5mm size ore materials falling from the material returning bin are scattered on the upper surface layer of the material distributing flow of the distributing device through the material swinging device, the 3-5mm size ore materials on the upper surface layer are located at the middle lower part of the material layer of the sintering trolley after falling due to the opposite running direction of the sintering trolley and the distributing direction of the distributing device, sintering heat accumulation is fully utilized to compensate the addition of the material returning from the sintering ore, which is not matched with solid fuel, the temperature capacity of the material layer at the lower part is increased, and the air permeability is improved.
The beneficial effects of the invention are as follows: through setting up the classifying vibration sieve and returning the stock bin, screen out 3-5mm granule in the sintering returns the ore, pass through the pendulum bob and rationally distribute in the middle lower part of the sinter bed in the form of dry material, cause the content segregation of the partial fuel of sinter bed up and down, make full use of the sintering heat accumulation; meanwhile, the wet capacity of the lower material layer is increased, the air permeability of the lower material layer is improved, the return ore quantity in the sintered mixture is reduced, and the mixing and granulating process efficiency of the mixture is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
the figure shows:
1. the material mixing device comprises a mixture, 2, a mixing bin, 3, a feeding roller, 4, a material flow control device, 5, a distributing device, 6, a material leveling device, 7, an igniter, 8, a sintering trolley, 9, 3-5mm size materials, 10, a return mineral bin, 11, a crusher, 12, a circular cooler, 13, a material swinging device, 14, a classifying vibrating screen, 15, a material mixing system, 16 and a finished product bin.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
The sintering equipment for reducing the burn-up of the sintering solid comprises a finished product bin 16, a batching system 15, a circular cooler 12, a crusher 11, a mixing bin 2, a distributing device 5 and a sintering trolley 8 which are sequentially arranged from top to bottom, wherein a flat material device 6 and an igniter 7 are arranged above the sintering trolley 8, the running direction of the sintering trolley is opposite to the distributing direction of the distributing device, the sintering trolley runs leftwards as shown in the figure, and the distributing device distributes material rightwards; also included are a classifying screen 14 and a return bin 10 located above the distribution path of the distributor.
The material after screening by the classifying vibrating screen 14 is divided into three particle sizes of +5mm, 3-5mm and-3 mm, namely, more than 5mm, 3-5mm and less than 3mm, wherein a conveying device is arranged between a material outlet of the particle size of 3-5mm and a material inlet of the ore return bin 10, and the material 9 of the particle size of 3-5mm is conveyed into the ore return bin through the conveying device. A belt conveyor is arranged between the material outlet of the +5mm particle size and the finished product bin 16, the material of the +5mm particle size is sent into the finished product bin through the belt conveyor, and the belt conveyor is arranged between the material outlet of the-3 mm particle size and the batching system 15, and the material of the-3 mm particle size is sent back to the batching system through the belt conveyor.
In order to control the flow relation of the mixture 1 and the 3-5mm size grade material 9, the discharge ports of the mixture bin 2 and the return mineral bin 10 are respectively provided with a material flow control device 4, and the material flow control device comprises a material flow plate which is inserted into the bin body and is obliquely arranged. The feeding roller 3 is arranged at the discharge hole of the mixing bin, the material swinging device 13 is arranged below the discharge hole of the return material bin, and materials in the return material bin can fall to the middle lower part of the sintering trolley layer by adjusting the material swinging device.
A sintering process for reducing the burnup of sintered solids comprises the following steps:
(1) Crushing the finished sintered ore by using a crusher, and cooling the crushed mineral aggregate by using a circular cooler;
(2) Feeding the mineral aggregate cooled by the annular cooler into a classifying vibrating screen, and screening the mineral aggregate into three particle sizes of +5mm, 3-5mm and-3 mm by the classifying vibrating screen;
(3) Feeding the mineral aggregate with the size of +5mm into a sintering finished product bin, feeding the mineral aggregate with the size of 3-5mm into a return mineral aggregate bin, and feeding the mineral aggregate with the size of-3 mm back into a sintering batching system;
(4) When the distributing device distributes materials, the material flow quality of the material outlet of the return mineral bin is controlled below 8% of the material flow quality of the material outlet of the mixing bin, meanwhile, 3-5mm size ore materials falling from the return mineral bin are scattered on the upper surface layer of the distributing material flow of the distributing device through the material swinging device, the 3-5mm size ore materials positioned on the upper surface layer are mixed with the sintering mixture falling from the mixing bin in the falling process due to the opposite running direction of the sintering trolley and the distributing direction of the distributing device, the position of the 3-5mm size ore materials, which are distributed into the sintering mixture, is close to the initial position of the sintering mixture after the falling, the larger the mixing degree of the 3-5mm size ore materials is, the larger the thickness of the 3-5mm size ore materials in the direction of the mixing material layer of the sintering trolley from the bottom to the surface of the material layer is, the sintering return mineral materials which are not mixed with solid fuel are fully utilized for filling, the temperature capacity of the lower material layer is increased, and the air permeability is improved.
According to the invention, the classifying vibrating screen and the return mineral bin are arranged, 3-5mm particles in the sintered return mineral are screened out, and are reasonably distributed at the middle lower part of the sintered material layer in a dry material form through the material swinging device, so that the content segregation of fuel at the upper and lower parts of the sintered material layer is caused, and the sintering heat storage effect is fully utilized; meanwhile, the wet capacity of the lower material layer is increased, the air permeability of the lower material layer is improved, the return ore quantity in the sintered mixture is reduced, and the mixing and granulating process efficiency of the mixture is improved.
Of course, the above description is not limited to the above examples, and the technical features of the present invention that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present invention and not for limiting the same, and the present invention has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.
Claims (4)
1. The utility model provides a reduce sintering equipment that sintering solid fires up, includes ring cooler (12) and breaker (11), and mixed feed bin (2), distributing device (5) and sintering trolley (8) that top-down set gradually, its characterized in that: the material screening device comprises a material distributing device, a material returning bin (10) and a classifying vibrating screen (14), wherein the material is arranged above the material distributing track of the material distributing device, the classifying vibrating screen (14) is divided into three particle sizes of +5mm, 3-5mm and-3 mm, a conveying device is arranged between a material outlet of the particle size of 3-5mm and a material inlet of the material returning bin (10), and a material swinging device (13) is arranged below a material outlet of the material returning bin;
sintering technology for reducing sintering solid burnup by using the sintering equipment:
1) Crushing the finished sintered ore by using a crusher, and cooling the crushed mineral aggregate by using a circular cooler;
2) Feeding the mineral aggregate cooled by the annular cooler into a classifying vibrating screen, and screening the mineral aggregate into three particle sizes of +5mm, 3-5mm and-3 mm by the classifying vibrating screen;
3) Feeding the mineral aggregate with the size of +5mm into a sintering finished product bin, feeding the mineral aggregate with the size of 3-5mm into a return mineral aggregate bin, and feeding the mineral aggregate with the size of-3 mm back into a sintering batching system;
4) When the distributing device distributes materials, the material flow quality of the discharge hole of the return mineral bin is controlled below 8% of the material flow quality of the discharge hole of the mixing bin, meanwhile, 3-5 mm-sized mineral aggregate falling from the return mineral bin is scattered on the upper surface layer of the distributing material flow of the distributing device through the swinging device, and the running direction of the sintering trolley is opposite to the distributing direction of the distributing device, so that the 3-5 mm-sized mineral aggregate positioned on the upper surface layer is positioned at the middle lower part of the sintering trolley layer after falling.
2. A sintering apparatus for reducing burn-up of sintered solids as set forth in claim 1 wherein: the discharge hole of the return material bin (10) is also provided with a material flow control device (4).
3. A sintering apparatus for reducing burn-up of sintered solids as set forth in claim 2 wherein: the material flow control device comprises a material flow plate which is inserted with the bin body of the return material bin and is obliquely arranged.
4. A sintering apparatus for reducing burn-up of sintered solids as set forth in claim 1 wherein: and a feeding roller (3) is arranged at a discharge hole of the mixing bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810127360.6A CN108004392B (en) | 2018-02-08 | 2018-02-08 | Sintering equipment and process for reducing burning up of sintered solid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810127360.6A CN108004392B (en) | 2018-02-08 | 2018-02-08 | Sintering equipment and process for reducing burning up of sintered solid |
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| CN108004392A CN108004392A (en) | 2018-05-08 |
| CN108004392B true CN108004392B (en) | 2024-02-23 |
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|---|---|---|---|---|
| CN110132013A (en) * | 2019-06-11 | 2019-08-16 | 山东钢铁股份有限公司 | A kind of hearth layer for sintering process optimization and with addition of technical equipment |
| CN111100983B (en) * | 2020-01-11 | 2022-03-18 | 武钢集团昆明钢铁股份有限公司 | Low-carbon, environment-friendly and efficient sintering method for fractional addition of sintering fuel |
| CN114251948B (en) * | 2020-09-22 | 2023-07-25 | 中冶长天国际工程有限责任公司 | Sintered fuel segregation distributing device and method |
| CN112179143B (en) * | 2020-09-29 | 2022-03-08 | 山东莱钢永锋钢铁有限公司 | Sintering material distribution system and sintering solid fuel adding method |
| CN114061314B (en) * | 2021-11-17 | 2023-06-23 | 马鞍山钢铁股份有限公司 | High-efficient cloth system of sinter mixture |
| CN115261615A (en) * | 2022-07-30 | 2022-11-01 | 山东泰山钢铁集团有限公司 | Sintering and batching method for return fines graded layered distribution |
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