Method for producing ferrovanadium by electric thermite method

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...