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A kind of preparation method of ferro-vanadium alloy

A vanadium ferroalloy and qualified technology are applied in the field of preparation of vanadium ferroalloy, which can solve problems such as difficulty in controlling vanadium content, and achieve the effects of improving smelting kinetics and thermodynamic conditions, high smelting efficiency and less slag production.

Active Publication Date: 2017-09-08
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

However, it is very difficult to control the vanadium content in the process slag, and it still fails to fundamentally solve the contradiction between the yield of ferrovanadium smelting and the amount of aluminum blended

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] with V 2 o 5 When used as smelting raw materials (160 parts in total), the aluminum distribution coefficient of the first and second phases is 1.05, the aluminum distribution coefficient of the third phase raw material is 1.0, the mass ratio of lime to vanadium oxide is 1.5:10, and iron The mass ratio of the input amount to the vanadium oxide is 11:20. For V that meets the requirements of raw material composition 2 o 5 , aluminum, iron and lime are mixed and fed in 3 phases, the feeding order is 4:3:1, and the slag is tapped twice and the iron is tapped once. The first phase of smelting raw materials is added to V 2 o 5 80 parts, 41 parts of aluminum, 44 parts of iron, 12 parts of lime; the raw material of the second phase is V 2 o 5 60 parts, 30 parts of aluminum, 33 parts of iron filings, 9 parts of lime; the raw material composition of the third phase is V 2 o 5 20 parts, aluminum 10 parts, iron filings 11 parts, lime 3 parts. The amount of slag in the firs...

Embodiment 2

[0045] V 2 o 3 and V 2 o 5 The ratio is 7:1 (V 2 o 3 140 copies; V 2 o 5 20 parts), the first and second phase raw materials have an aluminum ratio of 1.05, the third phase raw material aluminum ratio is 1.0, the mass ratio of lime dosage to vanadium oxide is 1.5:10, and the ratio of iron dosage to vanadium oxide The mass ratio is 13:20, and the mixture is mixed as required. Join V in the first phase 2 o 5 20 copies, V 2 o 3 60 parts, 34 parts of aluminum, 49 parts of iron, 16 parts of lime; add V in the second phase 2 o 3 60 parts, 21 parts of aluminum, 39 parts of iron, 9 parts of lime; the raw material composition of the third phase is V 2 o 5 20 parts, aluminum 10 parts, iron filings 11 parts, lime 3 parts. The amount of slag in the first two taps was 71 and 52 parts respectively, and the vanadium content in the slag was 1.73% and 1.87% respectively; the vanadium content in the slag before the third phase of iron tapping was 2.02%. The energization time of ...

Embodiment 3

[0047] V 2 o 3 and V 2 o 5 The ratio is 6:2(V 2 o 3 120 copies; V 2 o 5 40 parts), the aluminum distribution coefficient in the first two phases was adjusted to 1.10, the aluminum distribution coefficient in the third phase was 0.80, and the mass ratio of lime dosage to vanadium oxide was 2:10. Join V in the first phase 2 o 5 20 copies, V 2 o 3 60 parts, aluminum 35 parts, iron 50 parts, lime 16 parts; add V in the second phase 2 o 3 60 parts, 20 parts of aluminum, 38 parts of iron, 9 parts of lime; add V in the third phase 2 o 5 20 parts, aluminum 8 parts, iron 11 parts, lime 5 parts. The amount of slag in the first two taps was 71 and 51 parts respectively, and the vanadium content in the slag was 0.85% and 0.73% respectively; the vanadium content in the slag before the third phase of iron tapping was 1.85%, and the average vanadium content in the slag was 1.24%. The single furnace poor slag time is 165min, the refining time is 47min, and the total smelting ti...

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Abstract

The invention relates to a preparation method of vanadium-iron alloy, belongs to the field of metallurgy, and in particular relates to a preparation method of vanadium-iron alloy. The method of the present invention takes the mixture containing vanadium oxide as raw material, adopts the method of adding material in three stages and removing slag twice, prepares the mixture respectively according to the first, second and third stages, and adds the prepared mixture in stages The smelting is carried out in an electric furnace, and the slag is discharged once after the first phase and the second phase of smelting are completed; the vanadium oxide includes V2O3 and V2O5, and the mass ratio of V2O3 and V2O5 is 7:1-0:8. The method can not only reduce the loss of vanadium in the slag, increase the yield of ferrovanadium smelting, but also reduce the consumption of aluminum, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a preparation method of vanadium-iron alloy. Background technique [0002] Vanadium-iron alloys are widely used in vanadium-containing micro-alloyed steels. It has a dual strengthening mechanism of fine-grain strengthening and precipitation strengthening, thereby reducing overheating sensitivity and improving the strength and wear resistance of steel. Widely used in construction, aerospace, road and bridge industries. The production of ferro-vanadium alloy mainly includes thermal reduction methods such as silicothermal reduction method, aluminothermic reduction method and carbothermal reduction method. Due to the strong reduction activity of aluminum and the high calorific value of the reduction process, aluminothermic reduction is the most widely used. At present, ferro-vanadium production enterprises mainly smelt vanadium-containing raw materials with V 2 o 5 Mainly, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C35/00C22C33/04
Inventor 余彬鲜勇孙朝晖景涵唐红建杜光超王唐林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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