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Self-stirring process for smelting of ferrovanadium

A vanadium-iron alloy and self-stirring technology, which is applied in the field of iron and steel smelting, can solve the problems of lower comprehensive yield and smelting efficiency, poor stirring and injection of poor slag, and prolonged smelting time, so as to optimize slag characteristics and reduce vanadium content, and the effect of improving the life of the electric furnace

Active Publication Date: 2018-11-30
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] From the above-mentioned disclosed technology, the preparation of ferro-vanadium alloy mainly takes vanadium oxide as raw material at present, and Al, Si (ferrosilicon) are reducing agents, supplemented by electric heating to carry out the production of ferro-vanadium alloy. Operations such as mechanical injection are used to achieve stirring of the molten pool; however, on the one hand, these methods may cause poor slag effect due to uneven stirring and injection, and on the other hand, it is easy to cause slag splashing during the stirring process, prolonging the smelting time, thereby reducing Comprehensive yield and smelting efficiency

Method used

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Examples

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Effect test

preparation example Construction

[0030] The self-stirring agent used in the method of the invention is prepared by the following method: mixing 1 mass part of lime, 0-1 mass part of calcium carbonate and 0-1.5 mass parts of ball-milled iron particles, pelleting and drying to obtain the product.

[0031] Limestone in the self-stirring agent is mainly used for slagging, while calcium carbonate can also generate gas in addition to slagging. The main purpose of the ball milled iron particles is to increase the density of the material balls, which is beneficial to improve the stirring intensity after adding; the self-stirring agent is based on limestone. As a basis, adding calcium carbonate gradually, and then adding ball-milled iron particles, the effect gradually increases; therefore, preferably, the mass ratio of lime, calcium carbonate and ball-milled iron particles in the self-stirring agent is 1:0.5~1:0~1.5.

[0032] In order to achieve the optimal reaction kinetics effect, and ensure that the density of the ...

Embodiment 1

[0045] Preparation from the agitator: the lime is pelletized and dried through a disc pelletizer, obtained from the agitator, with an average particle size of 8mm and a density of 3.6kg / m 3 .

[0046] Ferro-vanadium alloy smelting: Put 100 parts by mass of vanadium flakes, 50 parts by mass of aluminum powder, 14 parts by mass of iron powder, and 7 parts by mass of lime into an electric furnace to ignite and strike the arc. Under the condition that the ratio of turning height to slag-gold thickness is 1.5:1, add 5 parts by mass of spherical self-stirring agent, through the sinking and melting of the material ball, promote the stirring of slag-gold and form a low-melting point slag system, continue to energize to maintain the system temperature at about After 15 minutes at 2000°C, under the conditions of a tipping angle of 30° and a ratio of tipping height to slag-gold thickness of 1:1, the molten slag-gold is tipped into the sand mold to realize the mixing of slag-gold during t...

Embodiment 2

[0049] Preparation from the agitator: Lime and calcium carbonate are pelletized and dried through a disc pelletizer at a weight ratio of 1:0.5, obtained from the agitator, with an average particle size of 10mm and a density of 3.8kg / m 3 .

[0050] Ferro-vanadium alloy smelting: put 100 parts by mass of vanadium flakes, 50 parts by mass of aluminum powder, 14 parts by mass of iron powder, and 5 parts by mass of lime in an electric furnace, ignite and strike the arc, and after 30 minutes of self-heating reaction, the pendulum feeder is used to Under the condition that the ratio of tipping height to slag-gold thickness is 1.5:1, add 10 parts by mass of spherical self-stirring agent, through the sinking and melting of material balls, gas is generated at the same time, which promotes the stirring of slag-gold and forms a low-melting point slag system, continue The temperature of the system is kept at about 2000°C by energizing. After 15 minutes, under the condition that the tipping...

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Abstract

The invention discloses a self-stirring process for smelting of ferrovanadium and belongs to the field of iron and steel smelting technology. The provided self-stirring process is simple to operate, ensures a long service life of a furnace lining and is high in alloy yield. The process is characterized in that a spherical self-stirring agent is added into a molten pool after an aluminothermic reduction spontaneous reaction, sufficient stirring of the molten pool is achieved by such means as heat release of the self-stirring agent, characteristic improvement of molten slag and gas generation topromote deep reduction of a material, molten slag gold is poured into a casting sand mold after finish of primary self-stirring for mixed melting of the slag gold, and secondary self-stirring is realized. The content of vanadium in the slag can be remarkably reduced through the self-stirring operation during smelting of ferrovanadium, so that the service life of an electric furnace is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a self-stirring process for smelting vanadium-iron alloys. Background technique [0002] Ferrovanadium is the most widely used vanadium microalloyed master alloy in the iron and steel industry. Vanadium-containing steel is widely used in machinery manufacturing, aerospace, construction roads and bridges and other industries, because the mechanical properties of steel will be significantly improved due to the addition of vanadium. The production principle of industrialized vanadium-iron alloy is mainly to use reducing agent to reduce vanadium-containing oxides and other vanadium-containing raw materials, and to form a solid solution with iron melt in a high-temperature molten state. [0003] At present, most enterprises in the world adopt the oxide of vanadium (V 2 o 5 / V 2 o 3 ) as the raw material, add an appropriate amount of reducing agent (Al / ...

Claims

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Application Information

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IPC IPC(8): C22B4/06C22B34/22
CPCC22B4/06C22B34/22
Inventor 余彬孙朝晖潘成景涵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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