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Method for producing ferrovanadium by electric thermite method

An electroaluminothermic and ferrovanadium technology, applied in the field of ferrovanadium production, can solve the problems of increasing smelting cost, increasing energy consumption and the like, and achieve the effects of improving vanadium recovery rate and reducing production cost.

Active Publication Date: 2015-12-23
攀钢集团西昌钒制品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will produce a large amount of vanadium-containing rich slag, which must be returned to the furnace for refining to increase the recovery rate of vanadium. Therefore, this method will increase energy consumption and increase smelting costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Mix together 6000kg of vanadium trioxide, 2795kg of aluminum pellets, 2593kg of iron filings and 1800kg of calcium oxide to form metallurgical raw materials. Put the mixed metallurgical raw materials into an electric arc furnace with a nominal capacity of 8t for smelting. The smelting voltage is 150V, the current is 16000A, and the time is 120 minutes. When the aluminum content in the vanadium-iron alloy liquid is 5.6% and the smelting slag When the vanadium content is 1%, the slag is produced, thereby completing the reduction of vanadium oxides. Then enter the oxidation and refining stage of the vanadium-iron alloy liquid, add 800kg of ferrous oxide with a particle size of 0.9mm to the vanadium-iron alloy liquid in the electric arc furnace, wherein the smelting voltage is 135V, the current is 16000A, and the time is 20 minutes. After refining The aluminum content in the vanadium-iron alloy liquid is 0.22%. Next, the vanadium-iron alloy liquid and slag are poured into ...

example 2

[0027] Mix together 5000kg of vanadium pentoxide, 2700kg of aluminum pellets, 1850kg of iron filings and 1500kg of calcium oxide to form metallurgical raw materials. Put the mixed metallurgical raw materials into an electric arc furnace with a nominal capacity of 5t for smelting. The smelting voltage is 150V, the current is 16000A, and the time is 120 minutes. When the aluminum content in the vanadium-iron alloy liquid is 4.9% and the smelting slag When the vanadium content is 1%, the slag is produced, thereby completing the reduction of vanadium oxides. Then enter the oxidation and refining stage of the vanadium-iron alloy liquid, add 575kg of ferric oxide with a particle size of 0.9mm to the vanadium-iron alloy liquid in the electric arc furnace, wherein the smelting voltage is 135V, the current is 16000A, and the time is 20 minutes. After refining The aluminum content in vanadium iron water is 0.09%. Next, the vanadium-iron alloy liquid and slag are poured into the ingot m...

example 3

[0029]Mix together 2000kg of vanadium trioxide, 5000kg of vanadium pentoxide, 3630kg of aluminum particles, 2720kg of iron filings and 2100kg of calcium oxide to form metallurgical raw materials. Put the mixed metallurgical raw materials into an electric arc furnace with a nominal capacity of 8t for smelting. The smelting voltage is 150V, the current is 16000A, and the time is 120 minutes. When the aluminum content in the vanadium-iron alloy liquid is 5% and the smelting slag When the vanadium content is 1%, the slag is produced, thereby completing the reduction of vanadium oxides. Then enter the oxidation and refining stage of the vanadium-iron alloy liquid, put 850kg of ferric oxide with a particle size of 0.95mm into the ladle, and then inject the vanadium-iron alloy liquid in the electric arc furnace into the ladle. Next, pour the vanadium-iron alloy solution into the ingot mold, let it cool naturally, and then release the mold and quench it with water, so as to obtain the...

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Abstract

The invention provides a method for producing ferrovanadium by an aluminothermic process. The method comprises the steps as follows: a) mixing metallurgical materials comprising vanadium oxide, aluminum particles, scrap iron and lime; b) carrying out reduction smelting in a smelting furnace and deslagging when ending the reduction smelting reaction; and c) adding iron-based oxide into a ferrovanadium alloy solution so as to reduce the content of Al in the ferrovanadium alloy solution to be not more than 0.5%. According to the method, the content of aluminum in the ferrovanadium alloy solution can be effectively reduced by using the iron-based oxide in the refining period, and the content of aluminum in produced ferrovanadium alloy is reduced to be the expected value; and in addition, a large amount of rich vanadium slag is not generated in the process of refining the ferrovanadium alloy solution by using the iron-based oxide, so that the vanadium recovery rate can be increased, the process of treating the vanadium slag is removed, and the production cost can be reduced.

Description

technical field [0001] The invention relates to a method for producing ferrovanadium by adopting an electric thermite method. Background technique [0002] Vanadium plays the role of deoxidation and grain refinement in steel, and a small amount of vanadium can improve the performance of steel and increase the wear resistance, toughness and strength of steel. Ferrovanadium (ferrovanadium alloy) has become the main alloy additive for smelting vanadium-containing steels because of its advantages of high alloying degree, high vanadium yield and low impurity content. [0003] The methods of smelting ferrovanadium generally include carbothermal method, silicothermal method, aluminothermic method and electric aluminothermic method. Since the electric thermite method has the advantages of relatively mature production technology, relatively advanced equipment level, and relatively stable product quality, the electric aluminotherm method is generally used to produce vanadium at prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/00C22C35/00C22C38/12C22B5/04
Inventor 刘鑫刘武汉马琼赖梅祥
Owner 攀钢集团西昌钒制品科技有限公司
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