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Method for smelting medium ferrovanadium

A smelting method and technology of ferrovanadium, which is applied in the field of ferrovanadium smelting in China, can solve the problems of long power-on smelting time, complex process, excess energy, etc., and achieve the effects of shortening smelting time, simplifying the process and improving the recovery rate

Inactive Publication Date: 2010-06-09
SICHUAN CHUANWEI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors also found that due to V 2 o 3 The density is small, using powder V 2 o 3 Volatilization is serious during smelting, which affects the direct yield of vanadium smelting, and due to the long smelting time of electricity, the production process conditions must be strictly controlled, otherwise the carbon content of ferrovanadium obtained from smelting is likely to exceed the standard, which will affect the quality of ferrovanadium
[0006] Therefore, there are two methods for the production of ferrovanadium by the aluminothermic method, one with excess energy and one with insufficient energy. At the same time, the melting point of the slag is relatively high, and the vanadium content in the slag must be reduced through subsequent refining processes to increase the recovery rate of vanadium. , which makes the process more complicated and restricts the increase in the production of ferrovanadium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Base material ratio: 75Kg V 2 o 5 , 38.5Kg Al, 17.5KgCaO, 30KgFe, and the total base material is 161Kg.

[0034] 2. Ratio of main ingredients: 400Kg V 2 o 5 、175Kg V 2 o 3 , 265Kg aluminum pellets, 125Kg CaO, 50Kg CaF 2 , 363Kg iron pellets, 10Kg refining agent aluminum calcium iron.

[0035]Among them, the chemical composition of Al-Ca-Fe alloy is Al 55, Ca 25% by weight, and the balance is iron and impurities. The impurity content of aluminum calcium iron is controlled as follows: C≤0.05%, Si≤0.1%, P≤0.02%, S≤0.02%, Mn≤0.2%, particle size 1-3mm.

[0036] 3. Technological process: first put V 2 o 3 Make dough, then use aluminum pellets, V 2 o 5 and V 2 o 3 Pellets, iron, lime, and fluorite are used as raw materials, and ferrovanadium is smelted by electric aluminothermic method.

[0037] A. In the early stage of smelting, add base material, ignite with magnesium scraps or energize the arc, and use the thermite reaction to produce medium vanadium iron. ...

Embodiment 2

[0042] 1. Base material ratio: 75Kg V 2 o 5 , 38.5Kg Al, 17.5Kg CaO, 30Kg Fe, the total base material is 161Kg.

[0043] 2. Ratio of main ingredients: 300Kg V 2 o 5 、300Kg V 2 o 3 , 260Kg aluminum pellets, 123Kg CaO, 50Kg CaF 2 , 375Kg iron pellets, 10Kg refining agent aluminum calcium iron.

[0044] Wherein, the chemical composition of Al-Ca-Fe alloy is 55% by weight of Al, 22% of Ca, and the balance is iron and impurities. The impurity content of aluminum calcium iron is controlled as follows: C≤0.05%, Si≤0.1%, P≤0.02%, S≤0.02%, Mn≤0.2%, particle size 1-3mm.

[0045] 3, the technical process is basically the same as in Example 1, the difference is that after continuously adding V in the furnace 2 o 5 and V 2 o 3 When mixing materials with pellets, if the self-heating is insufficient, it is necessary to lower the electrode and energize the arc at low power to supplement the heat. After adding the charge, increase the arc striking voltage, add Al-Ca-Fe alloy for re...

Embodiment 3

[0048] 1. Base material ratio: V 2 o 5 75Kg, Al 38.5Kg, CaO 17.5Kg, Fe 30Kg. The base material is 161Kg in total.

[0049] 2. Ratio of main ingredients: 240Kg V 2 o 5 、360Kg V 2 o 3 , 230Kg aluminum pellets, 110Kg CaO, 45KgCaF 2 , 370Kg iron pellets, 10Kg refining agent aluminum calcium iron.

[0050] Among them, the chemical composition of Al-Ca-Fe alloy is 50% by weight of Al, 28% of Ca, and the balance is iron and impurities. The impurity content of aluminum calcium iron is controlled as follows: C≤0.05%, Si≤0.1%, P≤0.02%, S≤0.02%, Mn≤0.2%, particle size 1-3mm.

[0051] 3, technological process is basically the same as embodiment 2, same, adding V continuously in furnace 2 o 5 and V 2 o 3 When mixing materials with pellets, if the self-heating is insufficient, it is necessary to lower the electrode and energize the arc at low power to supplement the heat. After adding the charge, increase the arc striking voltage, add Al-Ca-Fe alloy for refining, and keep the ...

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Abstract

The invention belongs to the metallurgy field and in particular relates to a method for smelting medium ferrovanadium. The invention aims to solve the technical problem of an electro-aluminothermic process with high vanadium recovery from smelting and is specifically characterized by adopting the mixed materials of V2O5 and V2O3 as the raw materials and using the electro-aluminothermic process to smelt the medium ferrovanadium. The method comprises the following steps: A. preparing bottom materials and main materials; B firstly adding the bottom materials for smelting at the initial stage of smelting; C. then adding the main materials after the bottom materials react steadily; and D. refining. The bottom materials include aluminium, V2O5, iron and lime. The main materials include V2O3, aluminium, V2O5, iron, lime and fluorite. The method not only fully utilizes the reaction heat, but also simplifies the technological process, reduces the viscosity of the slag and ensures the ferrovanadium recovery from smelting to be steadily increased by over 96%.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for smelting ferrovanadium. Background technique [0002] Vanadium in the form of ferrovanadium, vanadium compounds and metal vanadium is widely used in metallurgy, aerospace, chemical industry and other industries. Ferrovanadium is an important alloy additive in the iron and steel industry, which can improve the strength, toughness, ductility and heat resistance of steel. [0003] At present, the domestic and foreign production methods of ferrovanadium mainly include electrosilicothermic method and aluminothermic reduction method. [0004] FeSi75 is used as a reducing agent to reduce vanadium oxides in the initial stage of ferrovanadium reaction in electrosilicothermal smelting, and silicon-aluminum-ferroalloy is used as a refining agent to refine and reduce during the refining period. The smelting period is about 4-6 hours, and the recovery rate of vanadium smelti...

Claims

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Application Information

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IPC IPC(8): C22B5/04C22B4/06C22B34/22
Inventor 黄斌韩庆帅兴国刘奎仁蒲年文陈建设吴文东吕久吉谢建国
Owner SICHUAN CHUANWEI GRP CO LTD
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