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Vanadium iron spraying powder refining technique

A powder spraying and ferrovanadium technology is applied in the field of vanadium smelting, which can solve the problems of more losses than gains, unfavorable sustainable development, increased powder spraying and refining costs, etc., and achieves the effects of improving the recovery rate of vanadium, improving the reaction kinetic conditions and reducing the production cost.

Inactive Publication Date: 2008-03-26
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For rare vanadium resources, the loss of vanadium resources caused by low recovery rate is extremely detrimental to the sustainable development of the economy
In order to improve the recovery rate of vanadium in the ferro-vanadium smelting process, the main idea of ​​the prior art is to spray reducing powder in the slag produced by ferro-vanadium smelting for refining, and further reduce the residual vanadium in order to increase the vanadium smelting of ferro-vanadium. Recovery rate, but different powder spraying refining process operation methods have a greater impact on the recovery efficiency of residual vanadium, such as the reaction kinetics conditions of refining furnace materials, the reasonable preparation of reducing powder, etc., will directly lead to the increase of powder spraying refining costs, or even the loss outweighs the gain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1. Preparation of FeV80 smelting main charge: TV 64.1% V 2 o 3 1000kg, 98.3% V 2 o 5 2000kg, aluminum powder 1350kg, iron powder 330kg; prepare 90 kg of refined reduction powder, wherein aluminum powder 77% iron powder 23%, mix evenly and put into powder tank.

[0012] 2. Use the electric aluminothermic method to smelt ferrovanadium. After the main charge fully completes the aluminothermic reaction and the alloy and slag are separated, power off to lift the electrode, rotate the furnace body, and then insert the nozzle of the spray gun into the slag layer by 450-500mm. Spray the refined and reduced powder into the slag layer within 80 to 120 seconds, and the pressure of the injected reduced powder gas is 0.3Mpa to 0.5Mpa; after the reduced powder and slag are impacted by the blowing airflow and the furnace body is rotated and stirred , lift the spray gun, and stop the furnace rotation at the same time, then insert the electrode and continue heating and melting for 20...

Embodiment 2

[0015] 1. Preparation of FeV80 smelting main charge: TV 64.1% V 2 o 3 2000kg, 98.3% V 2 o 5 1000kg, aluminum powder 1330kg, iron powder 370kg; prepare 80 kg of refined reduction powder, wherein aluminum powder 75% iron powder 25%, mix evenly and put into powder tank.

[0016] 2. Use the electric aluminothermic method to smelt ferrovanadium. After the main charge fully completes the aluminothermic reaction and the alloy and slag are separated, power off to lift the electrode, rotate the furnace body, and then insert the nozzle of the spray gun into the slag layer by 450-500mm. Spray the refined and reduced powder into the slag layer within 80 to 120 seconds, and the pressure of the injected reduced powder gas is 0.3Mpa to 0.5Mpa; after the reduced powder and slag are impacted by the blowing airflow and the furnace body is rotated and stirred , lift the spray gun, and stop the furnace rotation at the same time, then insert the electrode and continue heating and melting for 20...

Embodiment 3

[0019] 1. Preparation of FeV50 smelting main charge: TV63.9% V 2 o 3 1400kg, 96.0% V 2 o 5 1000kg, aluminum powder 1110kg, iron powder 1240kg; prepare 80 kg of refined reduction powder, wherein aluminum powder 75% iron powder 25%, mix evenly and put into the powder tank.

[0020] 2. Use the electric aluminothermic method to smelt ferrovanadium. After the main charge fully completes the aluminothermic reaction and the alloy and slag are separated, power off to lift the electrode, rotate the furnace body, and then insert the nozzle of the spray gun into the slag layer by 450-500mm. Spray the refined and reduced powder into the slag layer within 80 to 120 seconds, and the pressure of the injected reduced powder gas is 0.3Mpa to 0.5Mpa; after the reduced powder and slag are impacted by the blowing airflow and the furnace body is rotated and stirred , lift the spray gun, and stop the furnace rotation at the same time, then insert the electrode and continue heating and melting fo...

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PUM

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Abstract

The present invention discloses one kind of powder spraying ferrovanadium refining process. During electro alumino-thermic process, and after completing alumino-thermic reaction, separating slag from the alloy and stopping heating, reductive powder material is sprayed through the spray gun inserted into the slag layer and the furnace body is rotated so that the sprayed powder material is well mixed to the slag. Then, the electrode is re-inserted for further smelting for one other 20-25 min, so as to make the residual vanadium in the slag reduced to produce ferrovanadium. The present invention has effectively improved reaction dynamic condition of the refined material, complete reaction, high vanadium recovering rate and lowered production cost.

Description

technical field [0001] The invention belongs to the technical field of vanadium smelting, and in particular relates to a powder spraying refining process of ferrovanadium. technical background [0002] Electroluminothermic smelting of ferrovanadium is widely used in the smelting of ferrovanadium alloys due to its short smelting period, simple operation and stable product quality. However, the process has the problem of low vanadium recovery rate. The rate is around 95.5%. For rare vanadium resources, the loss of vanadium resources caused by low recovery rate is extremely unfavorable to the sustainable development of economy. In order to improve the recovery rate of vanadium in the ferro-vanadium smelting process, the main idea of ​​the prior art is to spray reducing powder in the slag produced by ferro-vanadium smelting for refining, and further reduce the residual vanadium in order to increase the vanadium smelting of ferro-vanadium. Recovery rate, but different powder sp...

Claims

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Application Information

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IPC IPC(8): C22C33/02C22B34/22C22B5/00
CPCY02P10/20
Inventor 谢屯良刘武汉杜勇王永钢韩春辉
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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