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Technique for smelting vanadium iron from calcium vanadate

A production process and technology of calcium vanadate, applied in the field of vanadium metallurgy, can solve problems such as no calcium vanadate, no industrial application, etc., and achieve the effects of simplifying the production process, avoiding the problem of waste water pollution, and easy for employees to operate

Active Publication Date: 2008-01-09
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there have been no reports of calcium vanadate being used in the production of an intermediate product for steelmaking - ferrovanadium, let alone its industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0022] 1. Prepare the main charge for calcium vanadate smelting ferrovanadium: 3500kg of calcium vanadate with a vanadium content of 28.6%, 875kg of aluminum powder, and 805kg of iron powder;

[0023] Prepare 90kg of refined and reduced powder, including 60kg of aluminum powder and 30kg of iron powder, mix them evenly and put them into the material tank respectively.

[0024] 2. Carry out ferrovanadium smelting in the electric arc furnace by electric thermite method, and gradually add the main furnace material after the arc is energized, use 135V secondary voltage, 9500A current, and quickly increase the furnace temperature, so that the main furnace material can fully complete the thermite reaction, and the main furnace material After the charge is added, continue to energize and increase the temperature in the furnace. Sampling and testing the residual vanadium in the slag is 1.90%. Vanadium is 0.31% shutdown. The smelting power-on time is 85 minutes, the smelting furnace te...

Embodiment II

[0026] 1. Prepare the main charge for calcium vanadate smelting ferrovanadium: 4000kg of calcium vanadate with a vanadium content of 29.4%, 1005kg of aluminum powder, and 988kg of iron powder; prepare 90kg of refining and reducing powder, including 60kg of aluminum powder and 30kg of iron powder, mix them evenly and separate Load into tank.

[0027] 2. Carry out vanadium-iron smelting in the electric arc furnace by electric thermite method, and gradually add the main charge after the electric arc is ignited, use 130V secondary voltage, 1000A current, and quickly increase the furnace temperature, so that the main charge can fully complete the aluminothermic reaction, and the main charge After the charge is added, continue to energize, raise the temperature in the furnace to 1880°C, take a sample to test the residual vanadium in the slag is 1.88%, add refined and reduced powder, after adding the refined material, continue to energize and melt for about 20 minutes, then take a sam...

Embodiment III

[0029] 1. Prepare the main furnace charge for calcium vanadate smelting ferrovanadium: 4200kg of calcium vanadate with a vanadium content of 27.3%, 1058kg of aluminum powder, and 1028kg of iron powder; prepare 80kg of refining and reducing powder, including 60kg of aluminum powder and 20kg of iron powder, mix well and separate Load into tank.

[0030] 2. Use the electric thermite method to smelt ferrovanadium in the electric arc furnace. After the arc is energized, the main charge is gradually added to use a secondary voltage of 140V and a current of 9000A to quickly increase the furnace temperature so that the main charge can fully complete the aluminothermic reaction. After the addition is complete, continue to energize, increase the temperature in the furnace, take a sample to test the residual vanadium in the slag, which is 1.75%, add refined and reduced powder, after adding the refined material, continue to energize and melt for about 15 minutes, then take a sample to test...

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Abstract

A production of ferrovanadium concerned with calcium vanadate is carried out by smelting calcium vanadate, Al and ferrous powder at weight ratio of 100: (23-28): (23-27). The said calcium vanadate is selected from m-calcium vanadate, p-calcium vanadate or o-calcium vanadate, one of them at least, with V content of 24-43%. It has high recovery rate and no wastewater pollution.

Description

technical field [0001] The invention relates to a method of using calcium vanadate as a raw material to smelt ferrovanadium meeting the national standard through an aluminothermic method, which belongs to the field of vanadium metallurgy. Background technique [0002] The article "Reduction and Direct Alloying of Calcium Vanadate" in the 27th volume of "Steel" magazine in 1992 discloses direct alloying steelmaking with calcium vanadate, and it discloses that calcium vanadate and reducing agent aluminum powder or Mix silicon powder, slag-forming agent fluorite, etc., add binder water glass to make agglomerates, after drying, put them into the steelmaking furnace, rely on the high temperature in the furnace to make calcium vanadate react with the reducing agent, and reduce the produced vanadium Enter molten steel to complete the alloying process of vanadium in steel, but no specific process parameters are disclosed. This method aroused the interest of some smelting workers in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/00C22B34/22C22B5/04
Inventor 刘武汉王永钢韩春辉杜勇李千文
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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