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Method of smelting low-aluminum medium ferrovanadium by means of tilting furnace

A tilting furnace and ferro-vanadium technology, which is applied in the field of metallurgy, can solve problems such as substandard product quality and difficult control of alloy aluminum content, and achieve the effects of increasing smelting yield, reducing vanadium content, and improving economic benefits

Inactive Publication Date: 2018-03-06
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

If the amount of aluminum is further increased, excessive aluminum will enter the alloy and cause the product quality to be substandard; the aluminum content in the alloy is not easy to control, and when customers need low-aluminum ferrovanadium, they can only meet it by sacrificing the yield of vanadium. There is an intractable contradiction between the composition and yield of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw materials vanadium oxide, aluminum, iron and lime are mixed and put into a tiltable electric arc furnace for smelting in three phases. The aluminum ratio in the first two phases is 1.10, and the raw material in the first phase is: flake vanadium (V 2 o 5 Mass content 98.0%) 1000kg, V 2 o 3 3000kg (containing 64.0% vanadium), with 1922kg of aluminum, 2276kg of iron and 600kg of lime. After mixing the material evenly, put it into the furnace. The secondary voltage is 190V to energize the arc. Slag 3550kg; then add the second phase of raw materials: V 2 o 3 3000kg (containing 64.0% vanadium), with 1375kg of aluminum, 1707kg of iron, and 450kg of lime; after the charge is cleared, the secondary voltage is selected as 150V. After smelting and electrifying for 40 minutes, the residual vanadium in the slag is quickly analyzed to be 0.75%, and the theoretical slag in the furnace is 3900kg. Slag 3100kg; then add the third phase of raw materials: Fe 2 o 3(98.3%) 50...

Embodiment 2

[0023] The raw materials of vanadium oxide, aluminum, iron and lime are mixed and put into a tiltable electric arc furnace for smelting in three stages. The aluminum ratio of the first two stages is: 1.15, and the raw material of the first stage is: flake vanadium (V 2 o 5 Mass content 98.2%) 1000kg, V 2 o 3 3000kg (containing 64.2% vanadium), with 2009kg of aluminum, 2282kg of iron and 600kg of lime. Mix the material evenly and put it into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is cleared, the secondary voltage is 150V. After smelting and electrifying for 90 minutes, the residual vanadium in the slag was quickly analyzed to be 0.25%, the theoretical slag amount in the furnace was 4400kg, and the slag output was 3620kg; after that, the second phase of raw materials was added: V 2 o 3 3000kg (containing 64.4% of vanadium), 1437kg of aluminum, 1587kg of iron, 450kg of lime; after the charge is cleared, the seconda...

Embodiment 3

[0025] The raw materials of vanadium oxide, aluminum, iron and lime are mixed and put into a tiltable electric arc furnace for smelting in three stages. The aluminum ratio of the first two stages is: 1.20, and the raw material of the first stage is: flake vanadium (V 2 o 5 Mass content 98.2%) 1000kg, V 2 o 3 3000kg (containing 64.8% vanadium), with 2096kg of aluminum, 2272kg of iron and 600kg of lime. Mix the material evenly and put it into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is cleared, the secondary voltage is 150V. After 90 minutes of smelting and electrification, the residual vanadium in the slag was quickly analyzed to be 0.15%, the theoretical slag amount in the furnace was 4400kg, and the slag output was 3650kg; after that, the second phase of raw materials was added: V 2 o 3 3000kg (containing 64.6% of vanadium), 1500kg of aluminum, 1275kg of iron, 450kg of lime; the secondary voltage after the charge...

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Abstract

The invention discloses a method of smelting low-aluminum medium ferrovanadium by means of a tilting furnace. The vanadium content in slag can be reduced effectively, the yield of ferrovanadium can beincreased, and the aluminum content of an obtained medium ferrovanadium is relatively low. The method disclosed by the invention comprises the following steps: uniformly mixing raw materials: vanadium oxide, aluminum, ferrum and lime and adding the mixture into a tilting electric-arc furnace; and adopting a multi-phase smelting method, that is, after the vanadium content in slag in each stage isreduced, removing most of slag, then carrying out a repeated operation of charging and slagging in the next stage, adding a dealumination material in the last stage for dealuminating smelting, and then discharging slag and iron to obtain a final product. Parameters and proportions in the process are adjusted well, so that the vanadium content in the slag is reduced, the economical benefit is improved, and the dealumination material is added to dealuminate, so that the aluminum content of the obtained medium ferrovanadium is relatively low. The method disclosed by the invention is particularlysuitable for smelting production of low-aluminum medium ferrovanadium.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for smelting low-aluminum medium ferrovanadium by using a tilting furnace. Background technique [0002] Vanadium plays the role of deoxidation and grain refinement in steel, and a small amount of vanadium can improve the performance of steel and increase the wear resistance, toughness and strength of steel. Ferrovanadium (ferrovanadium alloy) has become the main alloy additive for smelting vanadium-containing steels because of its advantages of high alloying degree, high vanadium yield and low impurity content. [0003] At present, most domestic ferrovanadium manufacturers adopt the one-step electric aluminothermic smelting process. The prepared charge is energized and arc-ignited in the electric furnace to react to produce metal vanadium and alumina and release heat. The slag agent is combined to form slag with low melting point and low density. The iron particles mixed in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B5/04C22C35/00
CPCC22B34/22C22B5/04C22C35/00
Inventor 景涵杜光超余彬唐红建潘成
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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