Method for preparing ferrovanadium by rollover furnace through electro-aluminothermic process

An electro-aluminothermic and tilting furnace technology is applied in the field of metallurgy, which can solve the problems of saving aluminum consumption without improving the smelting yield of vanadium and ferrovanadium, and achieve the effects of reducing aluminum consumption in a single furnace, convenient operation and reducing vanadium content.

Active Publication Date: 2015-04-22
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

[0006] Judging from the above disclosed technologies, previous patents on ferrovanadium smelting focused on the selection of raw materials and reducing agents and how to effectively increase the recovery rate of vanadium. The focus of the patents was on the reduction process of ferrovanadium. There is no improvement in the consumption and the improvement of the smelting yield of ferrovanadium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The raw materials vanadium oxide, aluminum, iron and lime that meet the production requirements are mixed and put into a tiltable electric arc furnace for smelting in three phases. The aluminum ratio is A:B:C=1.4:0.7:0.5, (A *4+B*2+C*2) / 8=1, Phase 1 raw material: flake vanadium (V 2 o 5 Mass content 98.0%) 1000kg, V 2 o 3 3000kg (containing 64.1% vanadium), with 2446kg of aluminum, 2276kg of iron and 600kg 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. After smelting and electrifying for 90 minutes, the residual vanadium in the slag was quickly analyzed to be 0.12%, the theoretical slag amount in the furnace was 4400kg, and the slag output was 3550kg; after that, the second phase raw material was added: V 2 o 3 2000kg (containing 64.5% of vanadium), with 588kg of aluminum, 1138kg of iron, and 300kg of lime; after the furn...

Embodiment 2

[0028] The raw materials vanadium oxide, aluminum, iron and lime that meet the production requirements are mixed and put into a tiltable electric arc furnace for smelting in three phases. The ratio of aluminum ratio is A:B:C=1.25:0.95:0.65, (A *4+B*2+C*2) / 8=1, Phase 1 raw material: flake vanadium (V 2 o 5 Mass content 98.2%) 1000kg, V 2 o 3 3000kg (containing 64.2% vanadium), with 2168kg of aluminum, 2282kg of iron and 600kg 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. After smelting and electrifying for 90 minutes, the residual vanadium in the slag was quickly analyzed to be 0.25%, the theoretical slag amount in the furnace was 4400kg, and the slag output was 3620kg; after that, the second phase raw material: V 2 o 3 2000kg (containing 64.4% of vanadium), with 778kg of aluminum, 1140kg of iron, and 300kg of lime; after the fu...

Embodiment 3

[0031] The raw materials vanadium oxide, aluminum, iron and lime that meet the production requirements are mixed and put into a tiltable electric arc furnace for smelting in three phases. The aluminum ratio is A:B:C=1.4:1:0.2, (A *4+B*2+C*2) / 8=1, Phase 1 raw material: flake vanadium (V 2 o 5 Mass content 98.2%) 1000kg, V 2 o 3 3000kg (containing 64.8% vanadium), with 2445kg of aluminum, 2272kg of iron and 600kg 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. After the smelting was electrified for 90 minutes, the residual vanadium in the slag was quickly analyzed to be 0.15%, the theoretical slag amount in the furnace was 4400kg, and the slag output was 3650kg; after that, the second phase raw material was added: V 2 o 3 2000kg (containing 64.6% vanadium), with 852kg aluminum, 1135kg iron, and 300kg lime; after the charge is clear...

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Abstract

The invention belongs to the field of metallurgy and particularly relates to a method for preparing ferrovanadium by a rollover furnace through the electro-aluminothermic process. The method for preparing the ferrovanadium by the rollover furnace through the electro-aluminothermic process comprises the steps that raw materials of vanadium oxide, aluminum, iron and lime which meet the production requirement are evenly mixed and then added into the rollover type electric-arc furnace, the method combining multi-phase smelting and stepping aluminum distribution is adopted, most slag is removed after the content of vanadium in the slag is reduced to a certain level, the repeated operation of multiple phases of feeding and slag discharging is conducted, the slag and iron are discharged together when the last phase of smelting is conducted and poured into an ingot mould, and ferrovanadium alloy can be obtained after cooling is conducted. The method for preparing the ferrovanadium by the rollover furnace through the electro-aluminothermic process is convenient to operate, capable of lowering aluminum consumption and obvious in economic benefit; meanwhile, the smelting yield of the ferrovanadium is increased, and the obtained ferrovanadium product is low in content of aluminum.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a method for preparing ferrovanadium by a tilting furnace electric aluminotherm method. Background technique [0002] 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 machine manufacturing, construction, aerospace, railway, bridge and other industries because of its high strength, good toughness, wear resistance and corrosion resistance. There are three main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C35/00
Inventor 鲜勇孙朝晖景涵杜光超余彬唐红建王唐林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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