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CN-121992166-A - Control method, device, equipment and medium for improving vanadium slag yield in converter vanadium extraction

CN121992166ACN 121992166 ACN121992166 ACN 121992166ACN-121992166-A

Abstract

The invention relates to a control method, a device, equipment and a medium for improving the yield of vanadium slag in the vanadium extraction of a converter, and relates to the field of vanadium extraction of the converter, comprising the following steps of S1, returning a zero position of the converter, and starting oxygenation after an oxygen lance is lowered to a first liquid level at a first speed; S2, adding vanadium extraction cold materials in a first preset time, then lifting an oxygen lance to a second liquid level in a second preset time to perform first blowing, and S3, reducing the oxygen lance to a third liquid level at a third speed in the first blowing, performing second blowing to enable the liquid phase to reach a final temperature, and then performing lance extraction and oxygen closing. According to the control method provided by the invention, the oxidation effect of the vanadium slag can be obviously improved by optimizing the oxygen blowing process of extracting vanadium from the converter, the yield of the vanadium slag can be improved, and the iron content in the vanadium slag and the fluidity of the vanadium slag can be reasonably controlled.

Inventors

  • ZHANG GUODONG
  • WANG HUANLE
  • ZHOU SHENGGANG
  • DU CHUNLEI
  • LI QING
  • Chai Jiayue

Assignees

  • 承德建龙特殊钢有限公司

Dates

Publication Date
20260508
Application Date
20260213

Claims (10)

  1. 1. The control method for improving the yield of vanadium slag in the vanadium extraction of the converter is characterized by comprising the following steps of: s1, returning the converter to a zero position, and starting oxygenation after the oxygen lance descends to a first liquid level at a first speed; S2, adding vanadium extraction cold materials in a first preset time, and then lifting an oxygen lance to a second liquid level in a second preset time to perform first converting; s3, reducing the oxygen lance to a third liquid level at a third speed in the first blowing, performing the second blowing to enable the liquid phase to reach the end temperature, and then performing lance lifting and oxygen closing.
  2. 2. The control method of claim 1, wherein the first speed comprises lowering the lance 0.4-0.6m each time; preferably, the first liquid level comprises a height of 0.8-1m from the oxygen lance to the liquid level.
  3. 3. The control method of claim 1, wherein the first preset time includes oxygenation of 3min or less; Preferably, the vanadium extraction cold material comprises vanadium-titanium ore and vanadium-containing pellets; Preferably, the vanadium titanium ore comprises V 2 O 5 -1.7% and TFe 54%; Preferably, the vanadium-containing pellets comprise, by mass, V 2 O 5 to or more than 0.20%, TFe to or more than 60%; preferably, the addition amount of the vanadium-titanium ore is 35-45kg/t molten iron; preferably, the addition amount of the vanadium-containing pellets is 10-20kg/t of molten iron; preferably, the second preset time comprises an oxygenation time t which is 3<t-4 min; Preferably, the second speed comprises 0.04-0.06m of oxygen lance movement each time; preferably, the second liquid level comprises a height of 1.2-1.3m from the oxygen lance to the liquid level.
  4. 4. The control method according to claim 1, wherein the time of the first converting is 1-2min.
  5. 5. The control method of claim 1, wherein the third speed comprises 0.04-0.06m of oxygen lance per movement; preferably, the third liquid level comprises a height of 0.8-0.9m from the oxygen lance to the liquid level.
  6. 6. The control method according to claim 1, wherein the time of the second converting is 30 to 60 seconds; Preferably, the end point temperature is 1360-1400 ℃.
  7. 7. The control method according to claim 1, wherein the flow rate of oxygen is controlled to 19000-21000m 3 /h in oxygen blowing of the control method; Preferably, the pressure of oxygen is controlled to be more than or equal to 0.8MPa in the oxygen blowing of the control method.
  8. 8. A control device for improving the yield of vanadium slag in the vanadium extraction of a converter, which is characterized by comprising: The first control module is used for controlling the converter to return to the zero position, and the oxygen lance starts to oxygenate after descending to the first liquid level at a first speed; the second control module is used for controlling the addition of the vanadium extraction cold material in the first preset time, and then lifting the oxygen lance to a second liquid level in the second preset time to perform first converting; And the third control module is used for controlling the oxygen lance to be reduced to a third liquid level at a third speed in the first blowing, carrying out the second blowing to enable the liquid phase to reach the end temperature, and then carrying out lance lifting and oxygen closing.
  9. 9. An electronic device, the electronic device comprising: and a memory communicatively coupled to the at least one processor; Wherein the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the control method of improving vanadium slag yield in the converter vanadium extraction of any one of claims 1-7.
  10. 10. A computer storage medium, wherein computer executable instructions are stored in the computer storage medium, and when the computer executable instructions are executed by a processor, the control method for improving the yield of vanadium slag in the vanadium extraction of the converter according to any one of claims 1 to 7 is realized.

Description

Control method, device, equipment and medium for improving vanadium slag yield in converter vanadium extraction Technical Field The invention relates to the field of vanadium extraction of a converter, in particular to a control method, a device, equipment and a medium for improving the yield of vanadium slag in vanadium extraction of the converter. Background At present, along with continuous exploitation of vanadium titano-magnetite, high-quality magnetite resources are smaller and smaller, the vanadium content of the magnetite is gradually reduced, and the molten iron V is in a descending trend. In addition, due to the special control requirement of the blast furnace condition of vanadium-titanium smelting, the higher the molten iron V is, the higher the stable and smooth running difficulty of the blast furnace condition is, and the control of the molten iron V at a relatively lower level is also restricted. In the process of extracting vanadium from a converter, oxygen supply intensity, blowing time and cooling intensity are required to be accurately controlled, for example, CN109609719A discloses a binary air supply converter vanadium extracting method, which belongs to the technical field of ferrous metallurgy, and aims at different vanadium-titanium molten iron, air supply blowing conditions are adjusted, so that the burning loss of residual vanadium and carbon is reduced, the oxidation rate of vanadium is improved, and the quality of semi-steel is improved. CN118406901A discloses a method for extracting vanadium from a converter and application thereof, and relates to the technical field of vanadium extraction from the converter, wherein the method for extracting vanadium comprises the following steps of S1, introducing vanadium-containing molten iron into the converter, and adding a first preset material and pig iron; S2, oxygen is blown at the top of the converter, S3, a coolant is added, the temperature of semisteel is controlled to be a preset temperature, vanadium extraction is completed after vanadium extraction is performed for a preset time, and the first preset material is a mixture of quartz sand and ferric oxide balls. However, the change of the molten iron components easily causes the reduction of the vanadium oxidation rate, the comprehensive influence of all factors, the lower vanadium oxidation rate, the limited vanadium slag yield and the severe cost control pressure, and the search of a vanadium extraction process with high vanadium slag yield is urgent. Disclosure of Invention In view of the problems in the prior art, the invention aims to provide a control method, a device, equipment and a medium for improving the yield of vanadium slag in the vanadium extraction of a converter, so as to solve the defect that the quality of the vanadium slag is difficult to meet the requirement. To achieve the purpose, the invention adopts the following technical scheme: in a first aspect, the invention provides a control method for improving the yield of vanadium slag in vanadium extraction of a converter, which comprises the following steps: s1, returning the converter to a zero position, and starting oxygenation after the oxygen lance descends to a first liquid level at a first speed; S2, adding vanadium extraction cold materials in a first preset time, and then lifting an oxygen lance to a second liquid level in a second preset time to perform first converting; s3, reducing the oxygen lance to a third liquid level at a third speed in the first blowing, performing the second blowing to enable the liquid phase to reach the end temperature, and then performing lance lifting and oxygen closing. According to the control method provided by the invention, the oxidation effect of the vanadium slag can be obviously improved by optimizing the oxygen blowing process of extracting vanadium from the converter, the yield of the vanadium slag can be improved, and the iron content in the vanadium slag and the fluidity of the vanadium slag can be reasonably controlled. As a preferable technical scheme of the invention, the first speed comprises that the oxygen lance descends 0.4-0.6m each time. Preferably, the first liquid level comprises a height of 0.8-1m from the oxygen lance to the liquid level. As a preferable technical scheme of the invention, the first preset time comprises oxygenation less than or equal to 3min. Preferably, the vanadium extraction cold material comprises vanadium-titanium ore and vanadium-containing pellets. Preferably, the vanadium titanium ore comprises V 2O5 -1.7% and TFe-54% in mass percent. Preferably, the vanadium-containing pellets comprise more than or equal to 0.20% of V 2O5 and more than or equal to 60% of TFe in percentage by mass. Preferably, the addition amount of the vanadium-titanium ore is 35-45kg/t molten iron. Preferably, the addition amount of the vanadium-containing pellets is 10-20kg/t of molten iron. Preferably, the second preset time comprises an oxygenation time