Preparing method for vanadium-iron alloy

Abstract

The invention discloses a preparing method for a vanadium-iron alloy and belongs to the technical field of metallurgy. The preparing method includes the following steps that a, a vanadium-containing material is adopted as the raw material, the smelting process is divided into N stages, mixing materials are configured respectively in all the stages, the mixing materials from the first stage to the(N-1)th stage are fed into a furnace into two batches for smelting, after smelting of the (N-1)th stage is over and slag is discharged, the mixing material in the Nth stage is added into the furnace at a time for smelting prereduction, the aluminum matching coefficient of the first batch of mixing materials from the first stage to the (N-1)th stage is 1.0-1.1, the aluminum matching coefficient ofthe second match of mixing materials from the first stage to the (N-1)th stage is 1.0-1.4, the aluminum matching coefficient of the mixing materials in the Nth stage is 0.2-1.0, and the comprehensivealuminum matching coefficient of the total furnace charge is 1.00-1.08; and b, after reduction is over, molten slag metal is tipped over into a refining furnace for refining, after refining is over, furnace demounting is conducted after a furnace body is cooled naturally, the slag metal is separated, and the alloy is obtained. By means of the method, the thermodynamics conditions in the smelting process are better improved in the smelting process, and vanadium losses in the slag can also be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of vanadium-iron alloy. Background technique [0002] Vanadium-iron alloys are widely used in vanadium-containing micro-alloyed steels. It has a dual strengthening mechanism of fine-grain strengthening and precipitation strengthening, thereby reducing overheating sensitivity and improving the strength and wear resistance of steel. Widely used in construction, aerospace, road and bridge industries. The production of ferro-vanadium alloy mainly includes thermal reduction methods such as silicothermal reduction method, aluminothermic reduction method and carbothermal reduction method. Due to the strong reduction activity of aluminum and the high calorific value of the reduction process, aluminothermic reduction is the most widely used. At present, ferro-vanadium production enterprises mainly smelt vanadium-containing raw materials with V 2 o 5...

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Problems solved by technology

[0004] ZL201510496769.1 proposes a metal aluminum as reducing agent, with V 2 o 3 and V 2 o 5 Mixed vanadium oxides as raw materials, a multi-phase aluminothermic reduction ferrovanadium preparation method with a large electric furnace with slag and iron functions as the main equipment, under the premise that the comprehensive aluminum distribution coefficient is ≤ 1.05, the gradient is adopted according to the smelting period The smelting operation with decreasing aluminum ratio can greatly reduce the vanadium content in slag in the early stage of smelting, and realize the reduction of vanadium loss in slag and unit aluminum consumption, but the thermodynamic conditions of this method need to be improved