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Preparation method of ferrovanadium alloy

A technology of ferro-vanadium alloy and vanadium slag, which is applied in the field of ferro-alloy and can solve the problems of lengthy ferro-vanadium smelting process

Pending Publication Date: 2017-06-16
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen that the existing smelting process of using vanadium slag to produce ferrovanadium is lengthy, and there is still a lot of room to be tapped in terms of reducing energy consumption and cost

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  • Preparation method of ferrovanadium alloy

Examples

Experimental program
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Effect test

experiment example 1

[0047] refer to figure 1 , the vanadium slag (V 2 o 5 Grade 16%, TFe content 40%), reduced coal (ash content less than 10%) and additives (lime, CaO content 93%) are mixed and pelletized according to the mass ratio of 100:8:10 to obtain mixed pellets; the above mixed pellets The ball is supplied to the reduction roasting device (rotary hearth furnace) for reduction roasting treatment, the temperature of the reduction roasting treatment is 1000 degrees Celsius, and the metallized pellets with a metallization rate of 82% are obtained; the above metallized pellets are mixed with vanadium pentoxide (V 2 o 5 Grade 93%), aluminum particles and lime are mixed according to the mass ratio of 100:300:155:20, and then supplied to an electric arc furnace for smelting treatment, and the slag and iron are separated to obtain a vanadium-iron alloy.

[0048]After testing, the mass percentage of V in the obtained ferrovanadium alloy is 82.43wt%, the mass percentage of impurity Al is 1.94wt...

experiment example 2

[0050] refer to figure 1 , the vanadium slag (V 2 o 5 Grade 16%, TFe content 40%), reduced coal (ash content less than 10%) and additives (lime, CaO content 93%) are mixed and pelletized according to the mass ratio of 100:10:15 to obtain mixed pellets; the above mixed pellets The ball is supplied to the reduction roasting device (rotary hearth furnace) for reduction roasting treatment, the temperature of the reduction roasting treatment is 1100 degrees Celsius, and the metallized pellets with a metallization rate of 84% are obtained; the above metallized pellets are mixed with vanadium pentoxide (V 2 o 5 Grade 93%), aluminum particles and lime are mixed according to the mass ratio of 100:100:57:16, and then supplied to the electric arc furnace for smelting treatment, and the slag and iron are separated to obtain the vanadium-iron alloy.

[0051] After testing, the mass percentage of V in the obtained vanadium-iron alloy is 62.61wt%, the mass percentage of impurity Al is 1....

experiment example 3

[0053] refer to figure 1 , the vanadium slag (V 2 o 5 Grade 16%, TFe content 40%), reduced coal (ash content less than 10%) and additives (lime, CaO content 93%) are mixed and pelletized according to the mass ratio of 100:12.5:30 to obtain mixed pellets; the above mixed pellets The ball is supplied to the reduction roasting device (rotary hearth furnace) for reduction roasting treatment, the temperature of the reduction roasting treatment is 1300 degrees Celsius, and the metallized pellets with a metallization rate of 90% are obtained; the above metallized pellets are mixed with vanadium pentoxide (V 2 o 5 Grade 93%), aluminum particles and lime are mixed according to the mass ratio of 100:60:40:8, and then supplied to the electric arc furnace for smelting treatment, and slag and iron are separated to obtain ferrovanadium alloy.

[0054] After testing, the mass percentage of V in the obtained vanadium-iron alloy is 51.78wt%, the mass percentage of impurity Al is 1.34wt%, t...

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Abstract

The invention discloses a preparation method of a ferrovanadium alloy. The method includes: (1) subjecting vanadium slag, reducing coal and an additive to mixing pelletizing so as to obtain mixed pellets; (2) supplying the mixed pellets to a reduction roasting device to conduct reduction roasting treatment so as to obtain metallized pellets; and (3) mixing the metallized pellets with vanadium pentoxide, aluminum granules and lime, then supplying the mixture to an electric-arc furnace to perform smelting treatment, thus obtaining the ferrovanadium alloy. The method provided by the invention achieves comprehensive utilization of iron in vanadium slag to replace steel scraps for ferrovanadium smelting. Compared with the existing ferrovanadium smelting technology, the method saves the comprehensive energy consumption by more than 20%, reduces aluminum granule consumption by more than 70%, and lowers steel scrap consumption by 100%.

Description

technical field [0001] The invention belongs to the field of ferroalloys, in particular, the invention relates to a method for preparing vanadium-iron alloys. Background technique [0002] About 80% of the world's vanadium is used in the steel industry, mainly for the production of microalloyed steel and low alloyed steel. Vanadium plays an important role in alloy steel. When vanadium is added to steel, the comprehensive properties of steel will be significantly improved. Vanadium will form carbides and nitrides with carbon and nitrogen in molten steel, and the fine second phase precipitation will strengthen the steel. Adding vanadium as an alloying element to steel can increase the strength of the steel, refine the grains of the steel, eliminate the overheating tendency of the steel, and improve the red hot hardness, wear resistance and welding performance of the steel. As an alloying element, vanadium is often added to steel in the form of ferrovanadium, and vanadium-con...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B1/248C22B1/245C22C35/00C22C33/06
CPCC22B1/02C22B1/2406C22B1/245C22B1/248C22C33/06C22C35/00
Inventor 宋文臣王静静李红科曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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