CN112575178A - Preparation process of vanadium-titanium sinter - Google Patents
Preparation process of vanadium-titanium sinter Download PDFInfo
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- CN112575178A CN112575178A CN202011444197.XA CN202011444197A CN112575178A CN 112575178 A CN112575178 A CN 112575178A CN 202011444197 A CN202011444197 A CN 202011444197A CN 112575178 A CN112575178 A CN 112575178A
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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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- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
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- Life Sciences & Earth Sciences (AREA)
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a preparation process of vanadium-titanium sinter, which comprises the following steps: 1) uniformly mixing a sintering raw material A, wherein the sintering raw material A comprises, by weight, 50-60 parts of vanadium-titanium concentrate powder, 5-8 parts of iron concentrate powder, 10-20 parts of a flux and 3-5 parts of a fuel A; the fuel A is coke powder with the granularity less than or equal to 2mm and anthracite powder with the granularity less than or equal to 1 mm; uniformly mixing a sintering raw material B, wherein the sintering raw material B comprises 50-60 parts by weight of vanadium-titanium concentrate powder, 5-8 parts by weight of iron concentrate powder, 10-20 parts by weight of a flux and 3-5 parts by weight of fuel B; the fuel B is coke powder with the granularity of more than 2mm and less than or equal to 6 mm; 2) soaking the sintering raw material A with water, and pelletizing to obtain a pellet A; soaking the sintering raw material B with water, and pelletizing to obtain a pellet B; 3) distributing the pellets A to obtain a material layer A; distributing the material layer A by using a ball B to obtain a material layer B; 4) igniting and sintering to obtain vanadium-titanium sinter; the preparation process can improve the firing rate and reduce the solid fuel consumption.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to a preparation process of vanadium-titanium sinter.
Background
The preparation process of the sinter generally comprises the following steps: mixing various powdery iron-containing raw materials with a proper amount of fuel and flux, adding a proper amount of water, mixing and pelletizing, and then carrying out a series of physical and chemical changes on the materials on sintering equipment to bond mineral powder particles into blocks to obtain sintered ores.
The sinter is the main raw material for blast furnace production at present, and the quality of the sinter directly influences the economic index of the blast furnace production. The segregation is generated in the sintering and distributing process, so that the particle size of the solid fuel becomes coarse from top to bottom along the height of the material layer. The fuel grain size on the upper part of the material bed is smaller, and the fuel grain size on the lower part of the material bed is larger. The fuel particle size in turn directly affects the thickness of the sintered combustion zone: if the particle size is smaller, the combustion zone is too narrow, the physicochemical reaction in the sintering process cannot be fully carried out, and the quality of the sintered ore is influenced; and if the fuel granularity is too large, the combustion zone is too wide, the air permeability of the material layer is poor, the sintering rate is low, and the output of the sinter is influenced. The fuel particle size on the upper part of the material layer is too small, so that the specific surface area is large, the reactivity is good, the combustion speed is high, and the combustion speed is higher than the heat transfer speed; the fuel grain size at the lower part of the material bed is too large, the specific surface is small, the heat conductivity is poor, and the combustion speed is less than the heat transfer speed. The mismatching of the combustion speed and the heat transfer speed in the material layer can cause the highest temperature of the material layer to be reduced and the thickness of a high-temperature belt to be increased. In this case, if the maximum temperature of the material layer is increased to reach the optimum temperature required for the sintering process, the consumption of solid fuel must be increased, resulting in an increase in sintering cost.
Disclosure of Invention
In view of this, the present application provides a preparation process of a vanadium-titanium sintered ore, which can improve the firing rate and reduce the solid fuel consumption.
In order to solve the technical problems, the technical scheme provided by the application is a preparation process of vanadium-titanium sinter, which comprises the following steps:
1) uniformly mixing a sintering raw material A, wherein the sintering raw material A comprises, by weight, 50-60 parts of vanadium-titanium concentrate powder, 5-8 parts of iron concentrate powder, 10-20 parts of a flux and 3-5 parts of a fuel A; the fuel A is coke powder with the granularity less than or equal to 2mm and anthracite powder with the granularity less than or equal to 1 mm;
uniformly mixing a sintering raw material B, wherein the sintering raw material B comprises 50-60 parts by weight of vanadium-titanium concentrate powder, 5-8 parts by weight of iron concentrate powder, 10-20 parts by weight of a flux and 3-5 parts by weight of fuel B; the fuel B is coke powder with the granularity of more than 2mm and less than or equal to 6 mm;
2) soaking the sintering raw material A with water, and pelletizing to obtain a pellet A; soaking the sintering raw material B with water, and pelletizing to obtain a pellet B;
3) distributing the pellets A to obtain a material layer A; distributing the material layer A by using a ball B to obtain a material layer B;
4) igniting and sintering to obtain vanadium-titanium sinter.
Preferably, the flux is one or more of quicklime, dolomite and limestone.
Preferably, the fusing agent is limestone.
Preferably, the preparation process further comprises: sieving the coke powder to obtain the coke powder with the granularity less than or equal to 2mm and the coke powder with the granularity less than or equal to 6mm and more than 2 mm.
Preferably, the thickness of the material layer A is 350 mm-370 mm, and the thickness of the material layer B is 350 mm-370 mm.
Preferably, the vanadium-titanium concentrate powder, the iron concentrate powder and the flux in the sintering raw material A have the granularity of less than or equal to 3mm and account for 65-75% and the granularity of more than 3mm and account for 25-35%;
in the sintering raw material B, the vanadium-titanium concentrate powder, the iron concentrate powder and the flux have the granularity of less than or equal to 3mm and account for 75-85 percent, and the granularity of more than 3mm accounts for 15-25 percent.
Preferably, the particle diameters of the pellets A and B are 5-8 mm.
Preferably, the ignition temperature in the ignition process is 1100-1150 ℃, the ignition time is 2-2.5min, and the ignition negative pressure is 5-7 kPa.
Preferably, the sintering negative pressure in the sintering process is 12-13 kPa.
Preferably, the speed of the trolley during sintering in the sintering process is 2 m/min-2.2 m/min.
Preferably, the iron ore concentrate powder is iron ore concentrate powder without TiO 2.
Compared with the prior art, the detailed description of the application is as follows:
the invention can effectively improve the condition that the fuel granularity at the upper part and the lower part of the material layer is not uniform due to the distribution segregation in the sintering process, ensure that the width of the combustion zone at the upper part and the lower part of the material layer is moderate, improve the yield and the quality of sintered ore, improve the sintering rate and reduce the consumption of solid fuel.
The vanadium-titanium concentrate powder and the iron concentrate powder in the sintering raw material A have larger flux particle size, and are distributed at the bottom, and the titanium concentrate powder, the iron concentrate powder and the flux particle size in the material layer are smaller at the top and larger at the bottom, so that the air permeability and the firing rate of the sintering material in the sintering process are improved, the problem that the ball material with larger particle size is not completely fired through to reduce the firing rate is avoided, and the fuel consumption is reduced.
The fuel granularity in the sintering raw material A is smaller than that in the sintering raw material B, the fuel is distributed at the bottom, the fuel granularity in the material layer is large and small, the heat on the upper part of the material layer is relatively insufficient when the material layer is full, and the heat on the lower part is relatively excessive, so that the heat on the upper part and the lower part of the material layer is uniform, the fuel consumption in the sintering process is effectively reduced, the yield and the quality of the sintering ore are improved, the sintering rate is improved, and the fuel consumption is reduced.
The sintering method related by the invention is simple and easy to operate.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to specific embodiments.
In the present invention, the amount of the components is 10 kg.
Example 1
A preparation process of vanadium-titanium sinter comprises the following steps:
1)
sieving the coke powder to obtain the coke powder with the granularity less than or equal to 2mm and the coke powder with the granularity less than or equal to 6mm and more than 2 mm;
uniformly mixing a sintering raw material A, wherein the sintering raw material A comprises 55 parts by weight of vanadium-titanium concentrate powder, 6 parts by weight of iron concentrate powder, 15 parts by weight of a flux and 4 parts by weight of fuel A; the fuel A is coke powder with the granularity less than or equal to 2mm and anthracite powder with the granularity less than or equal to 1 mm;
uniformly mixing a sintering raw material B, wherein the sintering raw material B comprises 55 parts by weight of vanadium-titanium concentrate powder, 6 parts by weight of iron concentrate powder, 15 parts by weight of a flux and 4 parts by weight of fuel B; the fuel B is coke powder with the granularity of more than 2mm and less than or equal to 6 mm;
2) soaking the sintering raw material A with water, and pelletizing to obtain a pellet A; soaking the sintering raw material B with water, and pelletizing to obtain a pellet B;
3) distributing the material of the pellets A to obtain a material layer A, wherein the thickness of the material layer A is 350-370 mm; distributing the material layer A by using a ball B to obtain a material layer B, wherein the thickness of the material layer B is 350-370 mm;
4) igniting and sintering to obtain vanadium-titanium sinter.
Wherein the content of the first and second substances,
the fusing agent is limestone.
In the sintering raw material A, vanadium-titanium concentrate powder, iron concentrate powder and flux have the granularity of less than or equal to 3mm and account for 65-75 percent, and the granularity of more than 3mm accounts for 25-35 percent;
the vanadium-titanium concentrate powder, the iron concentrate powder and the flux in the sintering raw material B have the granularity of less than or equal to 3mm and account for 75-85 percent, and the granularity of more than 3mm accounts for 15-25 percent;
the particle diameters of the pellets A and B are 5-8 mm;
the ignition temperature in the ignition process is 1100-1150 ℃, the ignition time is 2-2.5min, and the ignition negative pressure is 5-7 kPa;
the sintering negative pressure in the sintering process is 12-13 kPa;
the speed of the trolley during sintering in the sintering process is 2 m/min-2.2 m/min.
The physical and chemical indexes of the raw materials are shown in Table 1
See Table 1
In this example, the sintering yield was 82.79%, and the drum strength was 67.82%
Example 2
Preparation process of vanadium-titanium sinter
This example differs from example 1 in that:
in the step 1), the step (A) is carried out,
uniformly mixing a sintering raw material A, wherein the sintering raw material A comprises, by weight, 50 parts of vanadium-titanium concentrate powder, 8 parts of iron concentrate powder, 10 parts of a flux and 5 parts of a fuel A; the fuel A is coke powder with the granularity less than or equal to 2mm and anthracite powder with the granularity less than or equal to 1 mm;
uniformly mixing a sintering raw material B, wherein the sintering raw material B comprises 50 parts by weight of vanadium-titanium concentrate powder, 8 parts by weight of iron concentrate powder, 10 parts by weight of flux and 5 parts by weight of fuel B; the fuel B is coke powder with the granularity of more than 2mm and less than or equal to 6 mm; the thickness of the material layer A in the step 3) is 350 mm; the thickness of the material layer B is 370 mm.
The sintering yield of the present example was 81.93%, and the drum strength was 66.89%.
Example 3
Preparation process of vanadium-titanium sinter
This example differs from example 1 in that:
in the step 1), the step (A) is carried out,
uniformly mixing a sintering raw material A, wherein the sintering raw material A comprises 60 parts by weight of vanadium-titanium concentrate powder, 5 parts by weight of iron concentrate powder, 20 parts by weight of flux and 3 parts by weight of fuel A; the fuel A is coke powder with the granularity less than or equal to 2mm and anthracite powder with the granularity less than or equal to 1 mm;
uniformly mixing a sintering raw material B, wherein the sintering raw material B comprises 60 parts by weight of vanadium-titanium concentrate powder, 5 parts by weight of iron concentrate powder, 20 parts by weight of flux and 3 parts by weight of fuel B; the fuel B is coke powder with the granularity of more than 2mm and less than or equal to 6 mm; in the step 3), the thickness of the material layer A is 370 mm; the thickness of the material layer B is 350 mm.
The sintering yield of this example was 81.74% and the drum strength was 66.72%.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. A preparation process of vanadium-titanium sinter is characterized by comprising the following steps:
1) uniformly mixing a sintering raw material A, wherein the sintering raw material A comprises, by weight, 50-60 parts of vanadium-titanium concentrate powder, 5-8 parts of iron concentrate powder, 10-20 parts of a flux and 3-5 parts of a fuel A; the fuel A is coke powder with the granularity less than or equal to 2mm and anthracite powder with the granularity less than or equal to 1 mm;
uniformly mixing a sintering raw material B, wherein the sintering raw material B comprises 50-60 parts by weight of vanadium-titanium concentrate powder, 5-8 parts by weight of iron concentrate powder, 10-20 parts by weight of a flux and 3-5 parts by weight of fuel B; the fuel B is coke powder with the granularity of more than 2mm and less than or equal to 6 mm;
2) soaking the sintering raw material A with water, and pelletizing to obtain a pellet A; soaking the sintering raw material B with water, and pelletizing to obtain a pellet B;
3) distributing the pellets A to obtain a material layer A; distributing the material layer A by using a ball B to obtain a material layer B;
4) igniting and sintering to obtain vanadium-titanium sinter.
2. The process according to claim 1, wherein the flux is one or more of quicklime, dolomite, and limestone.
3. A process according to claim 2, wherein the fluxing agent is limestone.
4. The manufacturing process of claim 1, further comprising: sieving the coke powder to obtain the coke powder with the granularity less than or equal to 2mm and the coke powder with the granularity less than or equal to 6mm and more than 2 mm.
5. The process according to claim 1, wherein the layer a has a thickness of 350mm to 370mm and the layer B has a thickness of 350mm to 370 mm.
6. The preparation process according to claim 1, wherein the vanadium-titanium concentrate powder, the iron concentrate powder and the flux in the sintering raw material A have a particle size of less than or equal to 3mm and account for 65-75% and a particle size of more than 3mm and account for 25-35%;
in the sintering raw material B, the vanadium-titanium concentrate powder, the iron concentrate powder and the flux have the granularity of less than or equal to 3mm and account for 75-85 percent, and the granularity of more than 3mm accounts for 15-25 percent.
7. The preparation process according to claim 1, wherein the particle size of the pellets A and B is 5-8 mm.
8. The process as claimed in claim 1, wherein the ignition temperature is 1100-1150 ℃, the ignition time is 2-2.5min, and the ignition negative pressure is 5-7 kPa.
9. The preparation process according to claim 1, wherein the sintering negative pressure in the sintering process is 12-13 kPa.
10. The process according to claim 1, wherein the speed of the carriage during sintering is 2m/min to 2.2 m/min.
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| CN202011444197.XA CN112575178A (en) | 2020-12-11 | 2020-12-11 | Preparation process of vanadium-titanium sinter |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57169025A (en) * | 1981-04-11 | 1982-10-18 | Sumitomo Metal Ind Ltd | Method and device for charging of raw material to be sintered |
| CA2009814A1 (en) * | 1989-02-13 | 1990-08-13 | Hidetoshi Noda | Method for manufacturing agglomerates of sintered pellets |
| CN102758084A (en) * | 2011-04-29 | 2012-10-31 | 攀钢集团有限公司 | Preparation method of high-ferrum low-silicon vanadium-titanium sintering ore |
| CN104263915A (en) * | 2014-09-28 | 2015-01-07 | 四川德胜集团钒钛有限公司 | Preparation method of high vanadium titanium sintering ore |
| CN106480307A (en) * | 2015-08-31 | 2017-03-08 | 鞍钢股份有限公司 | A kind of method improving homogeneous agglomerate |
| CN108998660A (en) * | 2018-09-30 | 2018-12-14 | 四川德胜集团钒钛有限公司 | A kind of vanadium ilmenite concentrate powder deep-bed sintering technique |
| CN109913639A (en) * | 2019-01-31 | 2019-06-21 | 武汉钢铁有限公司 | The sintering method of layer-by-layer distribution after a kind of fuel pre-screening |
-
2020
- 2020-12-11 CN CN202011444197.XA patent/CN112575178A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57169025A (en) * | 1981-04-11 | 1982-10-18 | Sumitomo Metal Ind Ltd | Method and device for charging of raw material to be sintered |
| CA2009814A1 (en) * | 1989-02-13 | 1990-08-13 | Hidetoshi Noda | Method for manufacturing agglomerates of sintered pellets |
| CN102758084A (en) * | 2011-04-29 | 2012-10-31 | 攀钢集团有限公司 | Preparation method of high-ferrum low-silicon vanadium-titanium sintering ore |
| CN104263915A (en) * | 2014-09-28 | 2015-01-07 | 四川德胜集团钒钛有限公司 | Preparation method of high vanadium titanium sintering ore |
| CN106480307A (en) * | 2015-08-31 | 2017-03-08 | 鞍钢股份有限公司 | A kind of method improving homogeneous agglomerate |
| CN108998660A (en) * | 2018-09-30 | 2018-12-14 | 四川德胜集团钒钛有限公司 | A kind of vanadium ilmenite concentrate powder deep-bed sintering technique |
| CN109913639A (en) * | 2019-01-31 | 2019-06-21 | 武汉钢铁有限公司 | The sintering method of layer-by-layer distribution after a kind of fuel pre-screening |
Non-Patent Citations (1)
| Title |
|---|
| 储满生: "《钢铁冶金原燃料及辅助材料》", 31 January 2010, 冶金工业出版社 * |
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Application publication date: 20210330 |