CN111349797A - Method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by converter - Google Patents
Method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by converter Download PDFInfo
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- CN111349797A CN111349797A CN202010191490.3A CN202010191490A CN111349797A CN 111349797 A CN111349797 A CN 111349797A CN 202010191490 A CN202010191490 A CN 202010191490A CN 111349797 A CN111349797 A CN 111349797A
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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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
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Abstract
The invention relates to a method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by a converter, belonging to the technical field of vanadium-titanium ore smelting. According to the crystallization characteristics and the principle of the vanadium slag, the method uses a silicon-containing slag regulating material, namely potassium feldspar, to regulate the slag of the ultra-low silicon molten iron, adjust the type of vanadium extraction cold burden and the bottom blowing gas supply intensity of the converter, perfect the slag tapping mode of the vanadium slag, adjust the vanadium extraction end point control and other measures, and achieves the effects of improving the grade of the vanadium slag after the vanadium extraction of the ultra-low silicon molten iron, reducing the iron content of the vanadium slag and improving the quality of the vanadium slag. The method is simple and reliable, solves the problems of low grade of vanadium slag, difficult crystallization and serious iron carrying, does not need to modify the existing equipment, and increases the grade of the vanadium slag after vanadium extraction from ultra-low silicon molten iron to 12.03 percent from 8.57 percent when the V of the molten iron is more than or equal to 0.200 percent; the iron content in the slag is reduced from 25% to 19%, and the method is easy to popularize and apply.
Description
Technical Field
The invention belongs to the technical field of vanadium-titanium ore smelting, and particularly relates to a method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by a converter.
Background
When a blast furnace is used for smelting schreyerite, low-Si operation is usually adopted for inhibiting the reduction of Ti, ensuring the smooth operation of the blast furnace, reducing the fuel ratio, improving the yield and the like. In vanadium-extracting and steel-making enterprises of schreyerite, the Si content of molten vanadium-titanium iron is mostly controlled to be 0.1-0.3%, and the proportion of Si content less than 0.10% is basically zero. In the smelting process of schreyerite, the proportion of molten iron Si less than 0.10% is increased to 30% due to larger fluctuation of ores and fuels. When the converter extracts vanadium from molten iron with the structure Si less than 0.10%, the problems of low vanadium slag grade, difficult crystallization and serious iron content frequently occur, and great influence is brought to the operation of vanadium extraction and steel making of the converter.
The influence of the Si content of the molten iron on the quality of the vanadium slag during vanadium extraction in the converter is studied to a certain extent, but most enterprises do not carry out deep research on the influence of large-scale blast furnaces, good stability of raw fuels and low proportion of ultralow-silicon (Si less than 0.10%) molten iron. The vanadium extraction of the ultra-low silicon molten iron converter does not form a mature and stable technical scheme, and is applied to the production process of vanadium extraction of the converter for a long time, and the vanadium extraction process of the converter needs to be further researched.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by a converter.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter comprises the following steps that Si is less than 0.1% in mass;
the method for extracting vanadium by the converter comprises the following steps:
step (1), adding ultra-low silicon-vanadium-titanium-iron water and pig iron into a converter, and then blowing;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.1-0.02%) X is positive, the mass ratio of pig iron to the ultra-low silicon vanadium titanium molten iron is (0.5 + 0.5): (51-53);
step (2), after blowing and ignition are finished, adding potassium feldspar for slag adjustment;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.01 percent, 0.05 percent), the mass ratio of the potassium feldspar to the ultra-low silicon vanadium titanium molten iron is (0.25-0.30): (51-53); when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.05 percent, 0.1 percent), the mass ratio of the ultra-low silicon vanadium titanium molten iron to the aluminosilicate feldspar is (0.12-0.16): (51-53);
during blowing, a bottom blowing nitrogen supply mode is adopted; blowing 2 stove 1 times of slagging tap promptly, and the stove of slagging tap tapping temperature of 1390-.
Further, preferably, the specific parameters of the bottom-blowing nitrogen supply mode are as follows: air supply amount of single branch pipe is 32-35m3H, total flow rate of 96-105m3H; the air supply intensity is 0.32-0.34m3/t·min。
Further, it is preferable that the gas supply time: 5-6 min/furnace.
Further, it is preferable that, in the blowing, the top-blown oxygen supply mode: the oxygen pressure is 0.6MPa to 0.7MPa, and the flow is 6400m3/h-6600m3H, oxygen supply intensity of 2.1-2.2m3/t·min。
Further, it is preferable that the mass content of molten iron (semisteel for short) C after vanadium extraction is not less than 3.0% at the end of blowing.
The control points in the method are as follows:
1. the main points of control of the vanadium extraction and loading system of the ultra-low silicon molten iron
2. The control key point of vanadium extraction and slag regulation of ultra-low silicon molten iron
When the Si content in the molten iron is less than 0.1%, the potassium feldspar is used for slag adjustment, and the addition amount is controlled as shown in the table 1.
TABLE 1
Adding time of the potassium feldspar: and adding in time after the blowing ignition is finished.
3. The main points of the control of vanadium extraction and gas supply of ultra-low silicon molten iron
4. Control key points of vanadium extraction temperature and slag tapping operation of ultra-low silicon molten iron
The innovation points of the invention are as follows:
1) the slag regulating principle of the silicon-containing material is as follows: according to FeO-SiO2And in the phase diagram, the melting point of a silicate phase is 1205 ℃, and the formation of the silicate phase reduces the melting point of the vanadium slag, reduces the viscosity and enhances the fluidity of the slag. By means of SiO2And (3) slag adjustment, wherein a binding phase of the vanadium slag is formed in the solidification process due to the relative increase of silicate, so that the vanadium slag is not excessively thick when the vanadium slag reaches the end point.
2) The slag regulating method of the silicon-containing material comprises the following steps: river sand, ferrosilicon and potash feldspar (SiO) with wide source are used2：70%、Al2O3: 18%) to carry out slag-regulating comparison test to ensure that SiO in the vanadium slag2The content reaches 12 to 15 percent. Several slag-regulating materials are characterized in that:
the river sand has high water content, fine particles and great difficulty in adding into a converter;
the ferrosilicon slag adjusting effect is good, but the price is as high as 5500 yuan/ton, and the cost is greatly increased;
the potash feldspar has wide source and low price, is in a 10-50mm block shape after being crushed and processed, and can be directly added into a converter from a bin; therefore, potassium feldspar is selected as the slag regulating material.
3) Improving the hydromechanical and kinetic conditions of the low-silicon iron: the low-silicon iron has insufficient water heat and poor vanadium slag fluidity after slagging.
Modifying the type of the low-silicon iron water cooling material to change thermodynamic conditions; the main types of the originally used vanadium-extracting cold materials are as follows: pig iron, small scrap steel, iron oxide leather ball and steel rolling production are cut end to end, and the cooling effect is that the iron oxide leather ball is more smallScrap steel and steel rolling are cut end to end and are larger than pig iron, and the pig iron with the lowest cooling effect is used as a coolant;
improving the strength of bottom blowing gas supply of the converter to achieve the aim of enhancing stirring and changing dynamic conditions; the air supply amount of a bottom blowing single branch pipe of the converter is from 20m3The h is increased to 32-35m3H, total flow rate is 60m3The/h is increased to 96-105m3H, bottom blowing intensity of 0.19m3The/t.min is increased to 0.32-0.34m3/t·min。
4) The slag tapping mode of the vanadium slag is changed. The slag discharging frequency of the original vanadium slag is controlled to be 1 time of slag discharging after 3-4 furnaces are continuously blown, the amount of slag in the furnaces is increased along with the increase of the number of the blowing furnaces, and the improvement of thermodynamic conditions and kinetic conditions are influenced. When extracting vanadium from ultra-low silicon molten iron, the deslagging number is adjusted to 2 furnaces of blowing, namely deslagging is carried out for 1 time, and the deslagging frequency is improved.
5) Adjusting the tapping end point control of the semisteel after vanadium extraction. The tapping temperature is improved, the fluidity of the slag is improved, the slag-iron separation is promoted, and the tapping temperature of the tapping furnace is improved from 1370 ℃ to 1390-1410 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) when the V of the molten iron is more than or equal to 0.200 percent, the grade of the vanadium slag after vanadium extraction of the ultra-low silicon molten iron is increased from 8.57 percent to 12.03 percent;
(2) the vanadium slag has good crystallization effect, and the content of band iron in the slag is reduced from 25% to 19%;
(3) the method has the advantages that the method improves market competitiveness for jade steel to expand ore types for vanadium-titanium ore, creates conditions for blast furnace low-temperature smelting cost reduction operation, and reserves the ultra-low silicon molten iron vanadium extraction and steelmaking technology;
(4) the existing equipment does not need to be modified;
(5) the method is simple and reliable, solves the problems of low grade of vanadium slag, difficult crystallization and serious iron content, and is easy to popularize and apply.
Drawings
FIG. 1 is a shape of vanadium slag produced by a conventional method; the crystallization effect of the vanadium slag is poor, the vanadium slag is bulk or is a ball with serious iron, the taste of the vanadium slag is 8.57 percent, and the iron content is 25 percent;
FIG. 2 shows the shape of vanadium slag produced by the method of the present invention; the vanadium slag has good crystallization effect, compact rock phase of the vanadium slag, no visible metal iron, 12.03 percent of the vanadium slag taste and 19 percent of the iron content.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
In the invention, unless otherwise stated, percentage numbers are mass percentages and proportions are mass ratios.
Example 1
A method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter comprises the following steps that Si is less than 0.1% in mass;
the method for extracting vanadium by the converter comprises the following steps:
step (1), adding ultra-low silicon-vanadium-titanium-iron water and pig iron into a converter, and then blowing;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.1-0.02%) X is positive, the mass ratio of pig iron to the ultra-low silicon vanadium titanium molten iron is (0.5 + 0.5): 51;
step (2), after blowing and ignition are finished, adding potassium feldspar for slag adjustment;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is [0.01%, 0.05% ], the mass ratio of the potassium feldspar to the ultra-low silicon vanadium titanium molten iron is 0.25: 51; when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.05 percent, 0.1 percent), the mass ratio of the ultra-low silicon vanadium titanium molten iron to the aluminosilicate feldspar is 0.12: 51;
during blowing, a bottom blowing nitrogen supply mode is adopted; blowing 2 stove 1 times of slagging tap promptly, and the stove of slagging tap tapping temperature of 1390-.
Example 2
A method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter comprises the following steps that Si is less than 0.1% in mass;
the method for extracting vanadium by the converter comprises the following steps:
step (1), adding ultra-low silicon-vanadium-titanium-iron water and pig iron into a converter, and then blowing;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.1-0.02%) X is positive, the mass ratio of pig iron to the ultra-low silicon vanadium titanium molten iron is (0.5 + 0.5): 53;
step (2), after blowing and ignition are finished, adding potassium feldspar for slag adjustment;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is [0.01%, 0.05% ], the mass ratio of the potassium feldspar to the ultra-low silicon vanadium titanium molten iron is 0.30: 53; when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.05 percent, 0.1 percent), the mass ratio of the ultra-low silicon vanadium titanium molten iron to the aluminosilicate feldspar is 0.16: 53;
during blowing, a bottom blowing nitrogen supply mode is adopted; blowing 2 stove 1 times of slagging tap promptly, and the stove of slagging tap tapping temperature of 1390-.
The specific parameters of the bottom blowing nitrogen supply mode are as follows: air supply amount of single branch pipe is 32-35m3H, total flow rate of 96-105m3H; the air supply intensity is 0.32-0.34m3/t·min。
Air supply time: 5 min/furnace.
During blowing, a top-blown oxygen supply mode: the oxygen pressure is 0.67MPa to 0.7MPa, and the flow is 6400m3/h-6600m3H, oxygen supply intensity of 2.1-2.2m3/t·min。
And at the end of converting, the mass content of the molten iron C after vanadium extraction is more than or equal to 3.0%.
Example 3
A method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter comprises the following steps that Si is less than 0.1% in mass;
the method for extracting vanadium by the converter comprises the following steps:
step (1), adding ultra-low silicon-vanadium-titanium-iron water and pig iron into a converter, and then blowing;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.1-0.02%) X is positive, the mass ratio of pig iron to the ultra-low silicon vanadium titanium molten iron is (0.5 + 0.5): 52;
step (2), after blowing and ignition are finished, adding potassium feldspar for slag adjustment;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is [0.01%, 0.05% ], the mass ratio of the potassium feldspar to the ultra-low silicon vanadium titanium molten iron is 0.28: 52; when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.05 percent, 0.1 percent), the mass ratio of the ultra-low silicon vanadium titanium molten iron to the aluminosilicate feldspar is 0.15: 52;
during blowing, a bottom blowing nitrogen supply mode is adopted; blowing 2 stove 1 times of slagging tap promptly, and the stove of slagging tap tapping temperature of 1390-.
The specific parameters of the bottom blowing nitrogen supply mode are as follows: air supply amount of single branch pipe is 32-35m3H, total flow rate of 96-105m3H; the air supply intensity is 0.32-0.34m3/t·min。
Air supply time: 6 min/furnace.
During blowing, a top-blown oxygen supply mode: the oxygen pressure is 0.67MPa to 0.7MPa, and the flow is 6400m3/h-6600m3H, oxygen supply intensity of 2.1-2.2m3/t·min。
And at the end of converting, the mass content of the molten iron C after vanadium extraction is more than or equal to 3.0%.
Example 4
A method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter comprises the following steps that Si is less than 0.1% in mass;
the method for extracting vanadium by the converter comprises the following steps:
step (1), adding ultra-low silicon-vanadium-titanium-iron water and pig iron into a converter, and then blowing;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.1-0.02%) X is positive, the mass ratio of pig iron to the ultra-low silicon vanadium titanium molten iron is (0.5 + 0.5): 52.5;
step (2), after blowing and ignition are finished, adding potassium feldspar for slag adjustment;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is [0.01%, 0.05% ], the mass ratio of the potassium feldspar to the ultra-low silicon vanadium titanium molten iron is 0.26: 52.5; when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.05 percent, 0.1 percent), the mass ratio of the ultra-low silicon vanadium titanium molten iron to the aluminosilicate feldspar is 0.14: 52.5; during blowing, a bottom blowing nitrogen supply mode is adopted; blowing 2 stove 1 times of slagging tap promptly, and the stove of slagging tap tapping temperature of 1390-.
The specific parameters of the bottom blowing nitrogen supply mode are as follows: air supply amount of single branch pipe is 32-35m3H, total flow rate of 96-105m3H; the air supply intensity is 0.32-0.34m3/t·min。
Air supply time: 5.5 min/furnace.
During blowing, a top-blown oxygen supply mode: the oxygen pressure is 0.67MPa to 0.7MPa, and the flow is 6400m3/h-6600m3H, oxygen supply intensity of 2.1-2.2m3/t·min。
And at the end of converting, the mass content of the molten iron C after vanadium extraction is more than or equal to 3.0%.
Application example:
a method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter comprises the following process steps:
A. a loading system: adding 52 tons of ultra-low silicon vanadium titanium molten iron into a 50-ton LD converter, wherein the temperature of the molten iron is 1250 ℃, the component C of the molten iron is as follows: 4.2%, Si: 0.04%, Mn: 0.25%, P: 0.083%, S: 0.025%, V: 0.212 percent, and the balance of Fe and trace elements. After the molten iron is added, 2 tons of pig iron are added, wherein the pig iron comprises the following components: c: 3.8%, Si: 0.50%, Mn: 0.32%, P: 0.096%, S: 0.032%, and the balance of Fe and trace elements.
B. Adjusting parameters before smelting: after the molten iron and the scrap steel are added into the furnace in the step A, adjusting the top oxygen blowing parameters of the oxygen lance as follows: oxygen pressure- (0.6-0.7 MPa), flow rate- (6400 and 6600 m)3H), oxygen supply intensity: (2.1-2.2 m)3T min); the bottom-blowing nitrogen supply parameters were adjusted as follows: air supply amount of single branch pipe is 32-35m3H, total flow rate of 96-105m3H; the air supply intensity is 0.32-0.34m3/t·min。
C. Controlling the smelting process: and B, after the step B is finished, the oxygen lance is arranged for ignition operation, after ignition, the lance position of the oxygen lance is arranged at a position of 1.1-1.2m of the oxygen lance scale plate, then 250-300kg of slag regulating material potassium feldspar is added from the high-position storage bin of the converter, and the lance position of the oxygen lance is lifted to a position of 1.3-1.4m of the oxygen lance scale plate. After continuously supplying oxygen for 4-5min, the oxygen lance position is lowered to 1m, and after supplying oxygen for 5-6min, the lance is lifted to close oxygen for converter reversing temperature measurement and sampling. Controlling the molten steel in the converter: the temperature 1390-.
D. Tapping operation: and (4) carrying out tapping operation after the requirement of the target control converter molten steel in the step C is met (if the requirement of temperature and C content is not met, oxygen is continuously supplied), wherein the molten steel after tapping is a smelted semi-finished product, namely semisteel, and carrying out loading by using a semisteel ladle, and then transferring to a semisteel smelting converter for carrying out subsequent qualified molten steel smelting operation.
E. Slag discharging operation: and D, after the step D is finished, the semisteel is loaded in the semisteel ladle, and the vanadium-containing slag (vanadium slag) remained in the converter for the semisteel is remained in the converter. And then adding molten iron and scrap steel, smelting again according to the step A, B, C, D, pouring the residual vanadium-containing slag in the furnace into a special container after tapping, and obtaining the vanadium slag material object shown in the figure 2 after air cooling and crushing.
Comparing the method of the present invention with the existing methods, the results are as follows:
1) and a loading system: the method takes the pig iron with the lowest cooling effect as the coolant, has single type and strong operability, has smaller heat loss compared with the original method of taking pig iron, small scrap steel, iron oxide leather balls and head and tail ends produced by steel rolling as the coolant, and solves the problem of insufficient heat of part of ultra-low silicon vanadium titanium molten iron.
2) And the strength of bottom blowing gas supply of the converter is improved so as to achieve the purpose of enhancing stirring and changing dynamic conditions. The air supply amount of a bottom blowing single branch pipe of the converter is from 20m3The h is increased to 32-35m3H, total flow rate is 60m3The/h is increased to 96-105m3H, bottom blowing intensity of 0.19m3The/t.min is increased to 0.32-0.34m3/t·min。
3) Adding the slag regulating material potassium feldspar to increase SiO in the vanadium slag2And (4) content, and the crystallization and molding of the vanadium slag are promoted.
4) Properly increasing the tapping temperature to promote the separation degree of slag and iron in the furnace and reduce the iron content in the slag.
5) The method solves the problems of difficult crystallization and serious iron content of the ultra-low silicon molten iron vanadium slag (figure 1 and figure 2), and improves the quality of the vanadium slag.
6) And creates conditions for reducing fuel ratio in low-temperature smelting of the blast furnace schreyerite.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron in a converter is characterized in that the mass content of Si in the ultra-low silicon vanadium-titanium molten iron is less than 0.1 percent;
the method for extracting vanadium by the converter comprises the following steps:
step (1), adding ultra-low silicon-vanadium-titanium-iron water and pig iron into a converter, and then blowing;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.1-0.02%) X is positive, the mass ratio of pig iron to the ultra-low silicon vanadium titanium molten iron is (0.5 + 0.5): (51-53);
step (2), after blowing and ignition are finished, adding potassium feldspar for slag adjustment;
when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.01 percent, 0.05 percent), the mass ratio of the potassium feldspar to the ultra-low silicon vanadium titanium molten iron is (0.25-0.30): (51-53); when the mass content of Si in the ultra-low silicon vanadium titanium molten iron is (0.05 percent, 0.1 percent), the mass ratio of the ultra-low silicon vanadium titanium molten iron to the aluminosilicate feldspar is (0.12-0.16): (51-53);
during blowing, a bottom blowing nitrogen supply mode is adopted; blowing 2 stove 1 times of slagging tap promptly, and the stove of slagging tap tapping temperature of 1390-.
2. The method for extracting vanadium from ultra-low silicon vanadium titanium molten iron in a converter according to claim 1, wherein the specific parameters of the bottom blowing nitrogen supply mode are as follows: air supply amount of single branch pipe is 32-35m3H, total flow rate of 96-105m3H; the air supply intensity is 0.32-0.34m3/t·min。
3. The method for extracting vanadium from ultra-low silicon vanadium titanium molten iron in the converter according to claim 2, wherein the gas supply time is as follows: 5-6 min/furnace.
4. The method for extracting vanadium from ultra-low silicon vanadium titanium molten iron in the converter according to claim 1, wherein in the blowing process, a top blowing oxygen supply mode comprises the following steps: the oxygen pressure is 0.6MPa to 0.7MPa, and the flow is 6400m3/h-6600m3H, oxygen supply intensity of 2.1-2.2m3/t·min。
5. The method for extracting vanadium from ultra-low silicon vanadium titanium molten iron in a converter according to claim 1, wherein at the end of blowing, the mass content of C in the molten iron after vanadium extraction is not less than 3.0%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111647706A (en) * | 2020-07-21 | 2020-09-11 | 攀钢集团攀枝花钢钒有限公司 | Converter vanadium extraction coolant and production method thereof |
| CN115505674A (en) * | 2022-08-26 | 2022-12-23 | 玉溪新兴钢铁有限公司 | Converter vanadium extraction method based on slag remaining operation |
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| CN1718554A (en) * | 2004-07-08 | 2006-01-11 | 武汉科技大学 | Treatment method of vanadium containing converter steel slag |
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| CN115505674A (en) * | 2022-08-26 | 2022-12-23 | 玉溪新兴钢铁有限公司 | Converter vanadium extraction method based on slag remaining operation |
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