CN110643809A - Sintering method and system with sintering return ores as embedded materials - Google Patents
Sintering method and system with sintering return ores as embedded materials Download PDFInfo
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- CN110643809A CN110643809A CN201911056565.0A CN201911056565A CN110643809A CN 110643809 A CN110643809 A CN 110643809A CN 201911056565 A CN201911056565 A CN 201911056565A CN 110643809 A CN110643809 A CN 110643809A
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- sintering
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- ores
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- 239000000463 material Substances 0.000 title claims abstract description 72
- 238000005245 sintering Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012216 screening Methods 0.000 claims abstract description 28
- 238000005469 granulation Methods 0.000 claims abstract description 10
- 230000003179 granulation Effects 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 22
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 10
- 230000035699 permeability Effects 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 239000007791 liquid phase Substances 0.000 description 6
- 235000020985 whole grains Nutrition 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- 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
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a sintering method and a system for sintering return ores as embedded materials, wherein the method at least comprises the following steps: preparing an embedded material; and directly conveying the obtained embedded material to the tail part of a secondary mixer of a sintering material granulation workshop for uniformly mixing. The system comprises: the return fine grain screening unit is used for further screening and grading the separated sintering return ores to obtain coarse-grade return ores; and the conveying unit is used for directly conveying the coarse fraction return ores obtained by screening to the tail end of the secondary cylinder mixer. The sintering return ores designed by the process and the device are used as an embedded material adding system, and coarse-fraction return ores are directly added to the tail end of the secondary cylinder mixer, so that the civil engineering and equipment investment of internal transfer and circulation facilities is reduced, and the operation and maintenance cost is saved; meanwhile, coarse fraction return ores do not participate in the granulating process, so that small balls of the mixture are protected, the filling rate of a mixer is reduced, the processing efficiency of unit volume is improved, and the granulating effect of the mixture is enhanced; and the powder is not easy to be wrapped by adhesive particles, and can play a role in supporting a material layer by being uniformly embedded in the mixture, improve the air permeability of the material layer and strengthen the sintering effect.
Description
Technical Field
The invention relates to a metallurgical process and equipment, in particular to a sintering method and a sintering system with sintered return ores as embedding materials.
Background
Because the iron and steel metallurgy sintering process has the automatic heat storage characteristic, the addition amount of solid fuel can be reduced by sintering the thick material layer, the oxidizing atmosphere of the sintering material layer is enhanced, the quality of the sintering ore is improved, the yield of the sintering ore is improved, and the aims of saving energy, reducing consumption and efficiently increasing yield in sintering production are further fulfilled. Therefore, the method is widely concerned and used by sintering enterprises at home and abroad. At present, the thickness of a sintering material layer of a domestic large and medium-sized sintering machine is generally more than 700mm, and some sintering material layers reach or exceed 800 mm.
Although the sintering of a thick material layer has a plurality of advantages, the blind increase of the thickness of the material layer also has the problems of increased airflow resistance of the material layer, overhigh negative pressure of a fan, aggravated air leakage of a sintering machine, insufficient effective air quantity of the material surface, no increase and reverse decrease of the productivity and the like. Therefore, the improvement of the granulation effect of the sintering material, the improvement of the air permeability of the material layer and the improvement of the sintering speed have important significance on the development progress of the thick material layer sintering technology.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a sintering method and a system for taking sintering return ores as embedding materials, which enable the sintering production to save energy, reduce consumption and increase yield with high efficiency.
In order to achieve the above object, the sintering method using sintered return ores as an embedded material of the present invention at least comprises:
preparing an embedded material;
and directly conveying the obtained embedded material to the tail part of a secondary mixer of a sintering material granulation workshop for uniformly mixing.
Further, the step of preparing the embedded material comprises the following steps: and further screening and grading the separated sintering return ores to obtain coarse-fraction return ores, namely the insertion materials.
Furthermore, the coarse fraction return fine is 3-5 mm.
Further, the method also comprises an embedded material storage procedure: and conveying the obtained coarse fraction return ores to a return ore buffer bin for storage.
In order to achieve the above object, the present invention provides a sintering system using sintered return ores as an insertion material, the system comprising: the coarse-grain return mine screening unit is used for further screening and grading the separated sintering return mine to obtain coarse-grain return mine;
and the conveying unit is used for directly conveying the coarse fraction return ores obtained by screening to the tail end of the secondary cylinder mixer.
In order to achieve the above object, the present invention provides a sintering system using sintered return ores as an insertion material, the system comprising: the coarse-grain return mine screening unit is used for further screening and grading the separated sintering return mine to obtain coarse-grain return mine;
the first conveying unit is used for directly conveying the coarse fraction return ores obtained by screening to a storage bin;
and the second conveying unit is used for directly conveying the coarse fraction return ores of the storage bin to the tail end of the secondary cylinder mixer.
Furthermore, the second conveying unit is a pull-type electronic belt scale, and the head pull-type electronic belt scale extends into the secondary cylinder mixer by 1.5-2 m.
The sintering return ores designed by the process and the device of the invention are used as an embedding material adding system, and the invention has the following obvious advantages and effects:
(1) the coarse fraction return ores are directly added to the tail end of the secondary cylinder mixer, so that civil engineering and equipment investment of internal transfer and circulation facilities are reduced, and operation and maintenance cost is saved;
(2) coarse fraction return ores do not participate in the granulating process, so that small balls of the mixture are protected, the filling rate of a mixer is reduced, the processing efficiency of unit volume is improved, and the granulating effect of the mixture is enhanced;
(3) the coarse fraction return ores belong to low-adhesion materials, are not easily wrapped by adhesion particles, are uniformly embedded in the mixture to play a role in supporting a material layer, and can improve the air permeability of the material layer;
(4) the soft melting temperature of the sintered return ores is lower than the melting point of a low-melting-point compound generated by the solid-phase reaction of the mixture, and the uniformly embedded coarse-fraction return ores are easy to become liquid phase centers and can strengthen the sintering effect;
(5) the technology and the device of the invention are effective supplementary ways for improving the air permeability of the sintering mixture, and are a simple and feasible process method with low investment and quick effect, and no special equipment, materials and raw materials are needed.
(6) The process and the device are implemented without newly building a production workshop, the scheme is simple and practical, the configuration and the operation are simple and convenient, and the process is reliable.
Drawings
FIG. 1: the process flow diagram of the invention;
FIG. 2: the structure of embodiment 1 of the system is schematically shown;
FIG. 3: the structure of embodiment 2 of the system is schematically shown.
Illustration of the drawings: 1-finished product whole grain sieve, 2-adhesive tape conveyer, 3-storage bin, 4-material dragging ore feeding valve, 5-pull electronic belt scale, 6-secondary cylinder mixer and 7-sintering ore returning sieve.
Detailed Description
The present invention will be further described with reference to the following examples.
The soft melting temperature of the sintered return ores is low, and the liquid phase generation is facilitated; and a certain substance exists in the fine fraction part of the return ores, so that the soft melting temperature is lower than the melting point of a low-melting-point compound generated by the solid-phase reaction of the mixture, and the sintering liquid phase generation is facilitated. Secondly, the sintered return ores belong to low-adhesion materials, wherein most of fine-fraction return ores are wrapped by adhesion particles and cannot play a role of a liquid phase center; and coarse fraction return ores are not easily wrapped by the adhered particles and easily become liquid phase centers to form liquid phase regions with reasonable areas, so that the uniform and reasonable development of the liquid phase regions in the sintering process is facilitated, and the method plays an important role in the quality of sintered minerals. In addition, when the coarse fraction return ores are too large, the granulation effect of the sintering material is not favorably strengthened, and when the coarse fraction return ores are not wrapped by the adhesive powder, the friction collision is easily caused to small balls of the mixture in the granulation rolling process, and the granulation effect is weakened because the small balls of the fine granules are damaged; the physicochemical property of the coarse fraction return ores also determines that the coarse fraction return ores can not participate in granulation and can be uniformly embedded into the sintering material to play a role in supporting the material layer, so that the air permeability of the material layer is improved.
The method of the invention comprises the following steps: obtaining and uniformly mixing the embedded materials; the embedded material obtaining process comprises a sintering return mine screening process and an embedded material storage process; the sintering return mine screening process is used for further screening and grading the sintering return mine separated from the sintering mine whole grain workshop to obtain coarse-grain return mine, namely embedding material; the embedded material storage procedure conveys the obtained coarse fraction return ores to a return ore buffer bin for storage; and in the mixing process, the obtained coarse fraction return ores are conveyed to the tail part of a secondary mixer of a sintering material granulation workshop to be mixed uniformly. Combining the above theories, the proper return mine addition system in the sintering material can improve the air permeability of the material layer and strengthen the sintering effect.
The system of the present invention comprises: the coarse-grain return mine screening unit is used for further screening and grading the separated sintering return mine to obtain coarse-grain return mine;
and the conveying unit is used for directly conveying the coarse fraction return ores obtained by screening to the tail end of the secondary cylinder mixer.
Example 1
This example is a new sintering project.
As shown in fig. 2, includes: finished product whole grain sieve 1, include from top to bottom in finished product whole grain sieve 1: a sieve plate of 20 mm; a 10mm sieve plate, a 5mm sieve plate and a 3mm sieve plate; a rubber belt conveyor 2 is arranged at the discharge port with the material diameter of +3 mm; a storage bin 3 is arranged at a discharge port of the rubber belt conveyor 2; a material dragging and feeding valve 4 is arranged at the discharge port of the storage bin 3; a pull-type electronic belt scale 5 is arranged below the material dragging and feeding valve 4; the output end of the pull-type electronic belt scale 5 is arranged in the secondary cylinder mixer 6. The diameter of the sieve pore can be adjusted according to the field production condition
As shown in fig. 2, the coarse fraction return ores obtained by screening, that is, the embedding materials, are conveyed to an embedding material storage bin by a belt conveyor; the undersize product returns to the batching system. No matter newly built or modified projects need not to add a return mine screening workshop, the scheme is simple and practical, and investment is saved.
Example 2
This embodiment is a retrofit project.
As shown in fig. 3, includes: finished product whole grain sieve 1, include from top to bottom in finished product whole grain sieve 1: a sieve plate of 20 mm; a 10mm sieve plate and a 5mm sieve plate; a sintered ore return screen 7 with the diameter of +3mm is arranged at a discharge port with the diameter of 5 mm; a discharge hole of the sintering return screen 7 is provided with a rubber belt conveyor 2; a storage bin 3 is arranged at a discharge port of the rubber belt conveyor 2; a material dragging and feeding valve 4 is arranged at the discharge port of the storage bin 3; a pull-type electronic belt scale 5 is arranged below the material dragging and feeding valve 4; the output end of the pull-type electronic belt scale 5 is arranged in the secondary cylinder mixer 6. The diameter of the sieve holes can be adjusted according to the field production condition.
As shown in fig. 3, the coarse fraction return ores obtained by screening, that is, the embedding materials, are conveyed to an embedding material storage bin by a belt conveyor; the undersize product returns to the batching system. No matter newly built or modified projects need not to add a return mine screening workshop, the scheme is simple and practical, and investment is saved. Conveying the embedded material obtained by the returned ore screening to an embedded material storage bin by an adhesive tape machine, wherein the embedded material storage bin is arranged at a proper position at the tail part of a secondary cylinder mixer of a sintering material granulation workshop; a feed opening of the storage bin is provided with a material dragging and feeding valve and a pulling type electronic belt scale, so that coarse fraction return ores can be quantitatively and uniformly fed; the configuration has simple operation and reliable process.
And conveying coarse fraction return ores in the storage bin to the tail end of the secondary cylinder mixer by a dragging ore feeding valve and a pull-type electronic belt scale for uniformly mixing, wherein the mixing length is preferably that the head of the pull-type electronic belt scale extends into the tail part of the secondary mixer by 1.5-2 m.
Claims (7)
1. A sintering method for sintering return ores as embedded materials is characterized by at least comprising the following steps:
preparing an embedded material;
and directly conveying the obtained embedded material to the tail part of a secondary mixer of a sintering material granulation workshop for uniformly mixing.
2. The sintering method using sintered return ores as inserts according to claim 1, wherein the step of preparing the inserts comprises: and further screening and grading the separated sintering return ores to obtain coarse-fraction return ores, namely the insertion materials.
3. The sintering method using sintered return ores as inserts according to claim 2, wherein the coarse fraction return ores are 3 to 5mm in size.
4. The method of sintering return ores as agglomerates according to claim 2, further comprising an agglomerate storage step of: and conveying the obtained coarse fraction return ores to a return ore buffer bin for storage.
5. A sintering system for sintering return ores as embedded materials is characterized by comprising: the coarse-grain return mine screening unit is used for further screening and grading the separated sintering return mine to obtain coarse-grain return mine;
and the conveying unit is used for directly conveying the coarse fraction return ores obtained by screening to the tail end of the secondary cylinder mixer.
6. A sintering system for sintering return ores as embedded materials is characterized by comprising: the coarse-grain return mine screening unit is used for further screening and grading the separated sintering return mine to obtain coarse-grain return mine;
the first conveying unit is used for directly conveying the coarse fraction return ores obtained by screening to a storage bin;
and the second conveying unit is used for directly conveying the coarse fraction return ores of the storage bin to the tail end of the secondary cylinder mixer.
7. The sintering system using sintered return ores as the embedded materials according to claim 6, wherein the second conveying unit is a pull-type electronic belt scale, and the head-pull type electronic belt scale extends into the secondary drum mixer by 1.5-2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056565.0A CN110643809A (en) | 2019-10-31 | 2019-10-31 | Sintering method and system with sintering return ores as embedded materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056565.0A CN110643809A (en) | 2019-10-31 | 2019-10-31 | Sintering method and system with sintering return ores as embedded materials |
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| CN110643809A true CN110643809A (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911056565.0A Pending CN110643809A (en) | 2019-10-31 | 2019-10-31 | Sintering method and system with sintering return ores as embedded materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652078A (en) * | 2022-11-04 | 2023-01-31 | 四川德胜集团钒钛有限公司 | Ore return mosaic sintering process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007177214A (en) * | 2005-11-30 | 2007-07-12 | Jfe Steel Kk | Method for producing ferrocoke |
| CN103757202A (en) * | 2014-01-30 | 2014-04-30 | 首钢总公司 | Sintering method for sintering part of return ores without granulation |
| CN104232883A (en) * | 2013-06-19 | 2014-12-24 | 宝山钢铁股份有限公司 | Mineral material usage method for increasing usage amount and production rate of sintered iron concentrate |
| CN105886753A (en) * | 2016-06-22 | 2016-08-24 | 中冶华天工程技术有限公司 | System and sintering process taking pellet return fines as embedded materials |
| CN108165734A (en) * | 2018-02-11 | 2018-06-15 | 四川东林矿山运输机械有限公司 | A kind of sintered technique and system |
-
2019
- 2019-10-31 CN CN201911056565.0A patent/CN110643809A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007177214A (en) * | 2005-11-30 | 2007-07-12 | Jfe Steel Kk | Method for producing ferrocoke |
| CN104232883A (en) * | 2013-06-19 | 2014-12-24 | 宝山钢铁股份有限公司 | Mineral material usage method for increasing usage amount and production rate of sintered iron concentrate |
| CN103757202A (en) * | 2014-01-30 | 2014-04-30 | 首钢总公司 | Sintering method for sintering part of return ores without granulation |
| CN105886753A (en) * | 2016-06-22 | 2016-08-24 | 中冶华天工程技术有限公司 | System and sintering process taking pellet return fines as embedded materials |
| CN108165734A (en) * | 2018-02-11 | 2018-06-15 | 四川东林矿山运输机械有限公司 | A kind of sintered technique and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652078A (en) * | 2022-11-04 | 2023-01-31 | 四川德胜集团钒钛有限公司 | Ore return mosaic sintering process |
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Application publication date: 20200103 |