Method for casting and dealuminizing ferrovanadium by electro-aluminothermic process

A technology of electric thermite and ferrovanadium, which is applied in the field of metallurgy to achieve the effect of simple steps, high dealumination efficiency and strong operability

Active Publication Date: 2014-11-12
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Judging from the above disclosed technologies, the existing research on the production of ferrovanadium by electroluminothermic met

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Raw material: flake vanadium (V 2 o 5 Mass content 98.0%) 200kg, V 2 o 3 1600kg (containing 65.1% vanadium), with 830kg of aluminum, 900kg of iron and 200kg of lime. Mix the raw materials evenly and put them into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is cleared, the secondary voltage is 135V. During this period, 300kg of iron oxide and 100kg of lime were added to the ingot mold for baking. The baking temperature was 350°C and the baking time was 180min. After smelting and electrifying for 90 minutes, the residual vanadium in the slag was quickly analyzed to be 0.38%, and it was cast out of the furnace at a casting temperature of 1980°C, and then cooled to room temperature with the ingot mold, and the alloy sample was taken for analysis. The aluminum content was 0.07%, and the obtained vanadium iron contained 50.6% vanadium , Vanadium yield 97.5%.

Embodiment 2

[0048] Raw material: flake vanadium (V 2 o 5 Mass content 98.5%) 200kg, V 2 o 3 1600kg (containing 65.5% vanadium), with 800kg of aluminum, 970kg of iron and 200kg of lime. Mix the material evenly and put it into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is cleared, the secondary voltage is 135V. During this period, 200kg of iron oxide and 100kg of lime were added to the ingot mold for baking, the baking temperature was 400°C, and the baking time was 150min. After smelting and electrifying for 85 minutes, the residual vanadium in the slag was quickly analyzed to be 0.43%. It was cast out of the furnace at a casting temperature of 1960°C, and then cooled to room temperature with the ingot mold. The alloy sample was taken for analysis. The aluminum content was 0.09%, and the obtained ferrovanadium contained 50.8% vanadium. , Vanadium yield 97.0%.

Embodiment 3

[0050] Raw material: flake vanadium (V 2 o 5 Mass content 97.8%) 200kg, V 2 o 3 1600kg (containing 65.3% vanadium), with 820kg of aluminum, 930kg of iron, and 200kg of lime. Mix the material evenly and put it into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is cleared, the secondary voltage is 135V. During this period, 250kg of iron oxide and 100kg of lime were added to the ingot mold for baking. The baking temperature was 300°C and the baking time was 240min. After smelting and electrifying for 95 minutes, the residual vanadium in the slag was quickly analyzed to be 0.63%. It was cast out of the furnace at a casting temperature of 1970°C, and then cooled to room temperature with the ingot mold. The alloy sample was taken for analysis. The aluminum content was 0.15%, and the obtained vanadium iron contained 50.2% vanadium. , Vanadium yield 97.2%.

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Abstract

The invention relates to a method for casting and dealuminizing ferrovanadium by an electro-aluminothermic process, belongs to the field of metallurgy, and aims to solve the technical problem of providing the method for casing and dealuminizing ferrovanadium by the electro-aluminothermic process. The method comprises the steps of reducing, refining and casting, wherein existing technical methods are adopted in the reducing and refining steps; before alloy liquid is cast, a mixture composed of ferric oxide and lime is put into an ingot module, and then is cast and cooled to obtain ferrovanadium; the mass ratio of ferric oxide to lime in the mixture of ferric oxide and lime is (2-3) to 1. The method for casting and dealuminizing ferrovanadium by the electro-aluminothermic process is simple in steps and strong in operability; and the content of aluminum in the produced ferrovanadium is less than 0.2wt%. The method has the advantages that the dealuminzation efficiency is high, the smelting time for dealuminization in a furnace can be shortened, and the like.

Description

technical field [0001] The invention relates to a method for dealuminating iron-vanadium casting by electric aluminotherm, belonging to the field of metallurgy. Background technique [0002] Ferrovanadium products are divided into medium ferrovanadium (FeV50) and high ferrovanadium (FeV80), which are mainly used as steelmaking additives, which can improve the comprehensive properties of steel. More than 80% of global vanadium production is used in the steel industry, and most of them are added to steel in the form of ferro-vanadium alloy. Vanadium can react with carbon and nitrogen in steel to form small and hard refractory metal carbides and nitrides. These compounds can act as refiners and precipitation strengthening agents to refine the structure and grain of steel. Increase the grain coarsening temperature, thereby reducing overheating sensitivity and improving the toughness, strength and wear resistance of steel products. Vanadium-containing steel is widely used in ma...

Claims

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Application Information

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IPC IPC(8): C21B15/02B22D27/20
Inventor 鲜勇孙朝晖景涵杜光超余彬唐红建王唐林陈海军尹丹凤
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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