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Method for smelting FeV80 by using vanadium-aluminum residual alloy

A vanadium-aluminum alloy and alloy technology, applied in the field of smelting FeV80 by using vanadium-aluminum residual alloy, can solve the problems of low utilization rate of vanadium-aluminum residual alloy resources, splashing, smelting furnace is easy to be corroded, etc., to improve the on-site operation environment, The effect of reducing TV content and improving kinetic conditions

Pending Publication Date: 2022-04-08
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

[0005] The purpose of the present invention is to further improve the yield of ferrovanadium, overcome the problems existing in the prior art that the iron-vanadium smelting process is prone to splashing, the smelting furnace is easily corroded, and the resource utilization rate of vanadium-aluminum residual alloy is low, etc. The method of smelting FeV80 by residual vanadium-aluminum alloy

Method used

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  • Method for smelting FeV80 by using vanadium-aluminum residual alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) 3226kg sheet vanadium, 3548kgAlV55 residual alloy, 940kg iron filings and 161kg lime are mixed to obtain a mixture;

[0045] (2) The mixture obtained in step (1) is transferred to a straight cylinder furnace (furnace lining is magnesia) for arc-starting smelting, and the smelting time is 88min; the furnace body is rotated, and then 160kg of refining agent (by weight ratio) is added using the blowing system It is obtained by mixing aluminum powder and lime at 1:1.5) for refining. During the refining process, electrode heating is used to maintain the system temperature at 1900 ° C. The refining time is 28 minutes. Then the straight cylinder furnace is transferred to the cooling zone for cooling. The cooling time is 20 hours, and then Ferrovanadium alloy cake A1 and ferrovanadium smelting slag B1 are obtained by separation.

Embodiment 2

[0047] (1) 3230kg sheet vanadium, 4199kgAlV55 residual alloy, 1030kg iron filings and 226kg lime are mixed to obtain a mixture;

[0048](2) Transfer the mixture obtained in step (1) to a straight cylinder furnace (furnace lining is magnesia) for arc-starting smelting, and the smelting time is 96min; the furnace body is rotated, and then 180% refining agent (by weight ratio) is added using the blowing system It is obtained by mixing aluminum powder and lime at 1:1.3) for refining. During the refining process, electrode heating is used to maintain the system temperature at 2000 ° C. The refining time is 32 minutes. Then the straight cylinder furnace is transferred to the cooling zone for cooling. The cooling time is 24 hours, and then Ferrovanadium alloy cake A2 and ferrovanadium smelting slag B2 are obtained by separation.

Embodiment 3

[0050] (1) 3235kg sheet vanadium, 4205kgAlV65 residual alloy, 1136kg iron filings and 324kg lime are mixed to obtain a mixture;

[0051] (2) The mixture obtained in step (1) is transferred to the straight tube furnace (furnace lining is magnesia) for arc-starting smelting, and the smelting time is 100min; the body of the furnace is rotated, and then 170kg of refining agent (by weight ratio) is added by the blowing system It is obtained by mixing aluminum powder and lime at 1:1.5) for refining. During the refining process, electrode heating is used to maintain the system temperature at 1950°C. The refining time is 35 minutes. Then the straight cylinder furnace is transferred to the cooling zone for cooling. The cooling time is 24 hours, and then Ferrovanadium alloy cake A3 and ferrovanadium smelting slag B3 are obtained by separation.

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Abstract

The invention relates to the technical field of iron and steel smelting, and discloses a method for smelting FeV80 by using vanadium-aluminum residual alloy. The method comprises the following steps: (1) mixing flake vanadium, vanadium-aluminum residual alloy, scrap iron and lime according to the weight ratio of 100: (110-150): (28-48): (5-15) to obtain a mixture; (2) transferring the mixture into a smelting furnace for arcing smelting; and then a refining agent is added for refining, cooling and separation are conducted, and the ferrovanadium alloy and ferrovanadium smelting slag are obtained. According to the method, the vanadium-aluminum residual alloy replaces pure aluminum to serve as a reducing agent for smelting, the problem of splashing caused by severe thermit reaction is solved, the field operation environment is improved, and the smelting recovery rate is increased; the adding amount of V2O5 is reduced, the slag amount is reduced, the dynamic conditions of chemical reactions in the smelting process are improved, the TV content in the slag is effectively reduced, and the vanadium recovery rate is increased; and the resource utilization rate of the vanadium-aluminum residual alloy is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for smelting FeV80 by utilizing residual vanadium-aluminum alloy. Background technique [0002] Ferro-vanadium alloy is a common alloy additive in the steel industry. Vanadium can react with carbon and nitrogen in steel to form fine and hard carbides and nitrides. These compounds can refine the structure and grain of steel. , increase the grain coarsening temperature, thereby reducing the overheating sensitivity, so that the strength, toughness and wear resistance of the steel are significantly improved. [0003] At present, ferrovanadium alloy smelting can be divided into carbothermal method, silicon thermal method and aluminothermic method according to different reducing agents. Considering the insufficient heat of reaction and maintaining the temperature of the reaction system, an electric heating device will be supplemented. Affected by environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C35/00C22C27/02
Inventor 黄云叶明峰余彬王宁
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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