CN112391525A - Preparation method and preparation system of vanadium-titanium pellets - Google Patents
Preparation method and preparation system of vanadium-titanium pellets Download PDFInfo
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- CN112391525A CN112391525A CN202011358194.4A CN202011358194A CN112391525A CN 112391525 A CN112391525 A CN 112391525A CN 202011358194 A CN202011358194 A CN 202011358194A CN 112391525 A CN112391525 A CN 112391525A
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- drying
- rotary kiln
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- 239000008188 pellet Substances 0.000 title claims abstract description 29
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 241001232253 Xanthisma spinulosum Species 0.000 description 1
- MRHSJWPXCLEHNI-UHFFFAOYSA-N [Ti].[V].[Fe] Chemical compound [Ti].[V].[Fe] MRHSJWPXCLEHNI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- C22B1/02—Roasting processes
-
- 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
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a preparation method and a preparation system of vanadium-titanium pellets. The system comprises a chain grate, a rotary kiln and a cooling fan which are communicated; the chain grate comprises a drum dry section, an air draft section, a preheating I section and a preheating II section which are sequentially communicated; the preheating section II is communicated with the rotary kiln; the cooling fan comprises a first circular cooler section, a second circular cooler section and a third circular cooler section which are sequentially communicated; one section of the circular cooler is communicated with the rotary kiln. The invention can control the wind temperature and wind speed of each section by arranging the cold wind valve, and improve the phenomenon that the wind speed cannot be continuously increased due to high wind temperature, thereby better controlling the temperature of each section, ensuring the drying, preheating, roasting and cooling effects of the pellets, and generating the pellets with high yield and high quality.
Description
Technical Field
The invention belongs to the technical field of vanadium-titanium pellet preparation, and particularly relates to a preparation method and a preparation system of vanadium-titanium pellets.
Background
The schreyerite as a composite iron ore resource has extremely high comprehensive utilization value, how to use the schreyerite and exert the maximum advantage of the resource, and the comprehensive recovery of iron vanadium titanium is always an effort target of scientific research workers in the metallurgical industry. In the traditional blast furnace process and the foreign non-blast furnace process for smelting schreyerite, only iron and vanadium are recovered, but titanium enters blast furnace slag, and a large amount of titanium resources are lost because the titanium grade is too low and economic and reasonable recovery value is not available. The production process of the vanadium-titanium pellet mainly comprises four working procedures of raw material pretreatment, raw material pelletizing, roasting and cooling. But the vanadium-titanium pellet prepared by the prior art has insufficient quality.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a preparation method and a preparation system of vanadium-titanium pellets, solves the problems that the quality cannot be guaranteed and the quality and the capacity cannot be improved in the production process, and provides a pellet production scheme with high and stable yield and quality.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
the preparation method of the vanadium-titanium pellet comprises the following steps:
(1) placing the green pellets in a chain grate machine with the thickness of 100-200mm, and then drying the green pellets in a blowing section at the temperature of 200-300 ℃ for 3-10 min; drying for 3-10 min in an air draft section at 300-350 ℃, and finally drying for 3-10 min in a preheating section at 700-1000 ℃;
(2) placing the green pellets treated in the step (1) into a rotary kiln, rotating the rotary kiln at the speed of 0.3-1.5 r/min, and roasting at 1200-1250 ℃ for 15-70 min;
(3) and (3) paving the product treated in the step (2) on a circular cooler with the thickness of 600-1000 mm, and after cooling by air blowing for 30-100min, reducing the temperature to below 150 ℃.
Further, the drying temperature of the air blowing section is 200 ℃; the drying temperature of the air draft section is 350 ℃; the drying temperature of the preheating section is 800-900 ℃.
Further, the drying time of the air blowing section is 5 min; the drying time of the air draft section is 5 min; the preheating section drying time is 20 min.
Further, the rotation speed of the rotary kiln was 1.5 r/min.
Further, the roasting temperature is 1250 ℃; the calcination time was 1200 ℃.
Further, the FeO content in the product is less than 5%.
A preparation system of vanadium-titanium pellets comprises a chain grate, a rotary kiln and a cooling fan which are communicated;
the chain grate comprises a drum dry section, an air draft section, a preheating I section and a preheating II section which are sequentially communicated; the preheating section II is communicated with the rotary kiln;
the cooling fan comprises a first circular cooler section, a second circular cooler section and a third circular cooler section which are sequentially communicated; one section of the circular cooler is communicated with the rotary kiln.
Further, the preheating section II is also communicated with a multi-pipe dust remover; the multi-tube dust remover is communicated with the two regenerative fans; the heat recovery fans are communicated with the air draft section; and a cold air valve is arranged between the regenerative fan and the multi-tube dust remover.
Further, the three sections of the circular cooler are communicated with a drying blower; the blowing-drying fan is communicated with the blowing-drying section; and a cold air valve is arranged between the ring cooling machine three sections and the air blowing machine.
Furthermore, the air draft section and the preheating section I are communicated with the electric dust remover at the same time, and a cold air valve is arranged between the electric dust remover and the air draft section and between the electric dust remover and the preheating section I.
And further, the second section of the circular cooler is communicated with the first preheating section, and a cold air valve is arranged between the second section of the circular cooler and the first preheating section.
Furthermore, the rotary kiln is obliquely arranged, and the inclination angle of the rotary kiln is 3-5%.
The invention has the beneficial effects that:
the invention can control the wind temperature and wind speed of each section by arranging the cold wind valve, and improve the phenomenon that the wind speed cannot be continuously increased due to high wind temperature, thereby better controlling the temperature of each section, ensuring the drying, preheating, roasting and cooling effects of the pellets, and generating the pellets with high yield and high quality.
Drawings
Fig. 1 is a schematic structural diagram of the system.
Wherein, 1, a drum dry section; 2. an air draft section; 3. preheating the section I; 4. preheating a second section; 5. a first section of the circular cooler; 6. a second stage of the circular cooler; 7. a circular cooler is divided into three sections; 8. a cold air valve; 9. a cooling fan; 10. a rotary kiln; 11. a multi-tube dust collector; 12. a heat regenerative fan; 13. an electric dust collector; 14. a blower fan; 15. a main exhaust fan.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Examples
As shown in fig. 1, the system for preparing vanadium-titanium pellets comprises a grate, a rotary kiln 10 and a circular cooler which are sequentially communicated.
The chain grate comprises a drum dry section 1, an air draft section 2, a preheating I section 3 and a preheating II section 4 which are communicated, wherein the drum dry section 1 is a green ball inlet end, and the preheating II section 4 is communicated with the rotary kiln 10.
The preheating II section 4 is also communicated with a multi-pipe dust remover 11, the multi-pipe dust remover 11 is also communicated with two regenerative fans 12 at the same time, and the regenerative fans 12 are simultaneously communicated with the air draft section 2; meanwhile, a cold air valve 8 is arranged between the regenerative fan 12 and the multi-tube dust collector 11.
In addition, air draft section 2 and I section 3 of preheating communicate with electrostatic precipitator 13 simultaneously to be provided with cold blast valve 8 between electrostatic precipitator 13 and air draft section 2 and I section 3 of preheating. The electric dust collector 13 is communicated with the main exhaust fan 15, so that the generated waste can be discharged from the chimney through the main exhaust fan 15.
The rotary kiln 10 is arranged obliquely, the inclination angle of the rotary kiln is 3-5%, the rotary kiln can rotate at the speed of 0.3-1.5 r/min, the preferred rotation speed is 1.5r/min, and the rotary kiln 10 is also a coke oven gas inlet.
The circular cooler comprises a circular cooler first section 5, a circular cooler second section 6 and a circular cooler third section 7; and the first section 5 of the ring cooling machine, the second section 6 of the ring cooling machine and the third section 7 of the ring cooling machine are respectively communicated with a cooling fan 9. Meanwhile, the three sections 7 of the circular cooler are also communicated with a drying blower 14, a cold air valve 8 is arranged between the three sections, and the drying blower 14 is communicated with the drying blower 1.
The method for preparing the vanadium-titanium pellets by adopting the system comprises the following steps:
(1) when the thickness of the qualified green balls is 100-200mm, the green balls are dried at the temperature of about 200 ℃ in the air blowing section and about 350 ℃ in the air draft section, and then are preheated at the high temperature of 700-1000 ℃ in the preheating section, so that the strength of the green balls meets the requirement, the drying and preheating operation is completed, and the operation time of the section is about 10-30 min;
(2) preheating raw balls, then roasting in a rotary kiln, wherein the roasting temperature is 1200-1250 ℃, the rotary kiln rotates at a constant speed of 1.5r/min during roasting operation so that the raw balls can slowly move to a kiln head and are uniformly roasted, when the compressive strength of the raw balls meets a preset requirement, the raw balls are discharged from the rotary kiln and enter a circular cooler for cooling, and the roasting operation time is about 15-70 min;
(3) the material spreading thickness of the baked green balls on a trolley of the circular cooler is 600-1000 mm, the green balls slowly move along with the trolley and are cooled by three sections of blast air, the final temperature of the green balls is reduced to be below 150 ℃, the content of FeO is less than 4%, when a small amount of green balls are not well cooled, the green balls need to be forcibly cooled by sprinkling water, the cooling process needs about 30-100min, and the cooled finished product balls are sent to a finished product bin or a stock yard of an iron plant.
Claims (10)
1. The preparation method of the vanadium-titanium pellet is characterized by comprising the following steps:
(1) placing the green pellets in a chain grate machine with the thickness of 100-200mm, and then drying the green pellets in a blowing section at the temperature of 200-300 ℃ for 3-10 min; drying for 3-10 min in an air draft section at 300-350 ℃, and finally drying for 3-10 min in a preheating section at 700-1000 ℃;
(2) placing the green pellets treated in the step (1) into a rotary kiln, rotating the rotary kiln at the speed of 0.3-1.5 r/min, and roasting at 1200-1250 ℃ for 15-70 min;
(3) and (3) paving the product treated in the step (2) on a circular cooler with the thickness of 600-1000 mm, and after cooling by air blowing for 30-100min, reducing the temperature to below 150 ℃.
2. The method for preparing vanadium-titanium pellets according to claim 1, wherein the blast section drying temperature is 200 ℃; the drying temperature of the air draft section is 350 ℃; the drying temperature of the preheating section is 800-900 ℃.
3. The method for preparing vanadium-titanium pellets according to claim 1, wherein the blast section drying time is 5 min; the drying time of the air draft section is 5 min; the preheating section drying time is 20 min.
4. The method for preparing vanadium-titanium pellets according to claim 1, wherein the rotation speed of the rotary kiln is 1.5 r/min.
5. The method for preparing vanadium-titanium pellets according to claim 1, wherein the roasting temperature is 1250 ℃; the calcination time was 70 min.
6. A preparation system of vanadium-titanium pellets is characterized by comprising a chain grate, a rotary kiln and a cooling fan which are communicated;
the chain grate comprises a drum dry section, an air draft section, a preheating I section and a preheating II section which are sequentially communicated; the preheating section II is communicated with the rotary kiln;
the cooling fan comprises a first circular cooler section, a second circular cooler section and a third circular cooler section which are sequentially communicated; and one section of the circular cooler is communicated with the rotary kiln.
7. The production system of claim 6, wherein the preheat stage II is further in communication with a multi-tube dust collector; the multi-tube dust remover is communicated with the two regenerative fans; the heat recovery fans are all communicated with the air draft section; and a cold air valve is arranged between the regenerative fan and the multi-tube dust remover.
8. The production system of claim 6, wherein the three sections of the annular cooler are in communication with a drying blower; the air blowing and drying fan is communicated with the air blowing and drying section; and a cold air valve is arranged between the ring cooling machine three sections and the air blowing machine.
9. The preparation system of claim 6, wherein the air draft section and the preheating I section are simultaneously communicated with the electric dust remover, and a cold air valve is arranged between the electric dust remover and the air draft section and between the electric dust remover and the preheating I section.
10. The preparation system of claim 6, wherein the annular cooler second section is communicated with the preheating first section, and a cold air valve is arranged between the annular cooler second section and the preheating first section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358194.4A CN112391525A (en) | 2020-11-27 | 2020-11-27 | Preparation method and preparation system of vanadium-titanium pellets |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358194.4A CN112391525A (en) | 2020-11-27 | 2020-11-27 | Preparation method and preparation system of vanadium-titanium pellets |
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| CN112391525A true CN112391525A (en) | 2021-02-23 |
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| CN202011358194.4A Pending CN112391525A (en) | 2020-11-27 | 2020-11-27 | Preparation method and preparation system of vanadium-titanium pellets |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812163A (en) * | 2022-04-16 | 2022-07-29 | 中钢石家庄工程设计研究院有限公司 | Belt type roasting machine for pellet production and processing technology |
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|---|---|---|---|---|
| CN101003851A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司球团厂 | Method for producing high titanium type acid pellet vanadium titanium by chain grate - rotary kiln |
| CN101624647A (en) * | 2009-08-04 | 2010-01-13 | 武汉钢铁(集团)公司 | Pellet roasting production technology recycling residual heat and system thereof |
| CN106755965A (en) * | 2016-12-30 | 2017-05-31 | 攀枝花钢城集团有限公司 | Vanadium-titanium pellet method for oxidation |
| CN108998659A (en) * | 2018-09-10 | 2018-12-14 | 山东金岭矿业股份有限公司 | With the process of water chestnut brown ocher and v-ti magnetite miberal powder processing pellet |
| CN111442648A (en) * | 2020-05-07 | 2020-07-24 | 扬州泰富特种材料有限公司 | Chain grate tail temperature field adjusting device |
-
2020
- 2020-11-27 CN CN202011358194.4A patent/CN112391525A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101003851A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司球团厂 | Method for producing high titanium type acid pellet vanadium titanium by chain grate - rotary kiln |
| CN101624647A (en) * | 2009-08-04 | 2010-01-13 | 武汉钢铁(集团)公司 | Pellet roasting production technology recycling residual heat and system thereof |
| CN106755965A (en) * | 2016-12-30 | 2017-05-31 | 攀枝花钢城集团有限公司 | Vanadium-titanium pellet method for oxidation |
| CN108998659A (en) * | 2018-09-10 | 2018-12-14 | 山东金岭矿业股份有限公司 | With the process of water chestnut brown ocher and v-ti magnetite miberal powder processing pellet |
| CN111442648A (en) * | 2020-05-07 | 2020-07-24 | 扬州泰富特种材料有限公司 | Chain grate tail temperature field adjusting device |
Non-Patent Citations (1)
| Title |
|---|
| 黄淑云: "稳定球团生产的若干设计问题", 《烧结球团》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812163A (en) * | 2022-04-16 | 2022-07-29 | 中钢石家庄工程设计研究院有限公司 | Belt type roasting machine for pellet production and processing technology |
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Application publication date: 20210223 |
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