The Method of Shortening the Time of Smelting Ferrovanadium

A technology of time and ferrovanadium, which is applied in the field of shortening the time for smelting ferrovanadium, can solve the problems of being unable to realize high-efficiency smelting with no powder or less powder, achieve the maximum utilization of vanadium resources, reduce volatilization loss, and improve the effect of slagging Effect

Active Publication Date: 2021-07-27
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 the time for smelting ferrovanadium, belonging to the technical field of vanadium metallurgy. this invention. In the method for smelting ferrovanadium of the present invention, 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, which is formed into a wet aggregate; the wet aggregate is dried to obtain Cold-solidified flux-type vanadium-containing pellets; add the dried cold-solidified flux-type vanadium-containing pellets, vanadium flakes, aluminum particles, iron filings, and lime into a vanadium-iron furnace for electric smelting to obtain ferrovanadium alloys. The present invention can achieve the purpose of shortening the smelting time without changing the follow-up conventional stirring method, and the product quality is not affected, and the effect of dust in the on-site environment of the feeding process and the smelting process is reduced.

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 Patents(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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