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Method for shortening ferrovanadium smelting time

A time, ferro-vanadium technology, applied in the field of shortening the smelting time of ferro-vanadium, can solve the problem of inability to achieve high-efficiency smelting with no powder or less powder, and maximize the utilization of vanadium resources, shorten the smelting time, and reduce the effect of dust.

Active Publication Date: 2020-06-16
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

However, the current ferrovanadium smelting still has powdery materials flying and floating on the surface of the slag during the smelting process, which makes it impossible to achieve efficient smelting with no powder or less powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix vanadium-containing powder (powdered vanadium trioxide, vanadium-containing dust sludge, etc.) and lime according to a certain ratio to prepare a mixture. The vanadium-containing dust sludge is dust removal ash obtained from vanadium iron, and the specific surface area is 500-3000cm 2 / g, the composition is V element content 5%, and the rest components are CaO, Al 2 o 3 , MgO and other impurities. According to the mass ratio, according to the proportion of vanadium trioxide: vanadium-containing dust: lime = 2:22:5, the cylindrical wet aggregate is obtained by extrusion molding, and the powder with a particle size below 0.5cm is found after screening. The proportion of the material under the sieve is only 2.5%, and the mass percentage of the material that adheres to the equipment and fails to gather and form is 5.5% of the total material. The drying temperature is 100-300°C, the drying time is 2 hours, the weight loss of the pellets is 5% due to dehydration, the re...

Embodiment 2

[0048] Mix vanadium-containing powder (powdered vanadium trioxide, vanadium-containing dust sludge, etc.) and lime according to a certain ratio to prepare a mixture. The surface area is 500~3000cm 2 / g, the composition is V element content 50%, and the remaining components are CaO, Al 2 o 3 , MgO and other impurities. According to the mass ratio, according to the proportion of vanadium trioxide: vanadium-containing dust sludge: lime = 104:56:15, spherical wet aggregates are obtained by rolling molding, and powdery sieves with a particle size below 0.5cm are found through sieving. The proportion of the lower material is only 5%, and the mass percentage of the material that adheres to the equipment and fails to gather and form is 10% of the total material. The drying temperature is 100-300°C, the drying time is 5 hours, the pellets lose 10% of their weight due to dehydration, the residual moisture in the dried pellets is less than 0.05%, and the pellet density is about 3.4g / c...

Embodiment 3

[0051] Mix vanadium-containing powder (powdered vanadium trioxide, vanadium-containing dust sludge, etc.) and lime according to a certain ratio to prepare a mixture. The mixture of dust removal ash obtained from iron, the specific surface area is 500-3000cm 2 / g, the composition is V element content 27.5%, and the remaining components are CaO, Al 2 o 3 , MgO and other impurities. According to the mass ratio, according to the proportion of vanadium trioxide: vanadium-containing dust and mud: lime = 52:39:10, spherical wet aggregates are obtained by roll forming, and powdery sieves with a particle size below 0.5cm are found through sieving. The proportion of the lower material is only 2.5%, and the mass percentage of the material that adheres to the equipment and fails to gather and form is 1% of the total material. The drying temperature is 100-300°C, the drying time is 5 hours, the pellets lose 10% of their weight due to dehydration, the residual moisture in the dried pelle...

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Abstract

The invention relates to a method for shortening ferrovanadium smelting time, and belongs to the technical field of vanadium metallurgy. The method for smelting ferrovanadium comprises the following steps that vanadium trioxide, vanadium-containing dust and lime are mixed according to a certain ratio to prepare a mixture; water is added to prepare a wet material, and molding is performed to prepare wet aggregates; the wet aggregates are dried to obtain cold consolidation flux type vanadium-containing pellets; and the dried cold consolidation flux type vanadium-containing pellets, flake vanadium, aluminum particles, scrap iron and lime are added into a ferrovanadium furnace for electrified smelting to obtain a ferrovanadium alloy. According to the method, on the premise that a subsequent conventional stirring method is not changed, the purpose of shortening the smelting time can be achieved, the product quality is not affected, and the effect of reducing flying dust in the field environment in the feeding process and the smelting process is achieved.

Description

technical field [0001] The invention belongs to the technical field of vanadium metallurgy, and in particular relates to a method for shortening the time for smelting ferrovanadium. Background technique [0002] Ferro-vanadium alloys are used as alloy additives to improve the quality of steel products, and are mainly used in the production of vanadium-containing alloy steel and cast iron. The preparation principle of ferrovanadium is: using a reducing agent to reduce the vanadium-containing oxide, and obtain it by solid solution with the iron raw material in a high-temperature melting state. It is generally smelted in an electric arc furnace. According to different reducing agents, it can be divided into electric thermite method and electric silicothermal method. The electric furnace plays the role of providing additional energy required for the reaction. Among them, the electric aluminotherm method can obtain high-grade vanadium-containing ferrovanadium due to the short sme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/06C22B1/24C22B5/04C22C35/00
CPCC22B1/2406C22B4/06C22B5/04C22C35/00
Inventor 叶明峰余彬景涵师启华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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