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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

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

[0031] Limestone in the self-mixing agent is mainly used for slagging, and calcium carbonate can also generate gas in addition to slagging. The main purpose of ball milling iron particles is to increase the density of the material balls and improve the mixing strength after adding; the self-mixing agent is limestone The benchmark is to gradually add calcium carbonate and then ball mill iron particles, and the effect gradually increases; therefore, it is preferable that the mass ratio of lime, calcium carbonate and ball mill iron particles in the self-mixing agent is 1:0.5-1:0-1.5.

[0032] In order to achieve the optimal reaction kinetics effect, and to ensure that the density of the self-stirring agent is between th...

Example Embodiment

[0044] Example 1

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

[0046] Ferro-vanadium alloy smelting: A mixture of 100 parts by mass of vanadium, 50 parts by mass of aluminum powder, 14 parts by mass of iron powder, and 7 parts by mass of lime is charged in an electric furnace to ignite the arc. After 30 minutes of self-heating reaction, the mixture is poured through a pendulum feeder. Under the condition that the ratio of the turning height to the thickness of the slag gold is 1.5:1, 5 parts by mass of spherical self-stirring agent is added, and the sinking and melting of the material ball promotes the stirring of the slag gold and forms a low-melting slag system. 2000℃, 15min later, under the condition that the tipping angle is 30° and the tipping height to slag thickness ratio is 1:1, the molten slag gold is poured into the s...

Example Embodiment

[0048] Example 2

[0049] Self-mixing agent preparation: the lime and calcium carbonate are pelletized and dried by a disc pelletizer at a weight ratio of 1:0.5, obtained from the agitating agent, with an average particle size of 10mm and a density of 3.8kg / m 3 .

[0050] Ferro-vanadium alloy smelting: A mixture of 100 parts by mass of vanadium, 50 parts by mass of aluminum powder, 14 parts by mass of iron powder, and 5 parts by mass of lime is charged in an electric furnace, ignited to start the arc, and after 30 minutes of self-heating reaction, it is heated by a pendulum feeder. Under the condition that the ratio of the tipping height to the thickness of the slag gold is 1.5:1, add 10 parts by mass of spherical self-stirring agent, through the sinking and melting of the pellets, gas is generated at the same time to promote the stirring of the slag gold and form a low-melting slag system, continue Keep the temperature of the system at about 2000 ℃ after power on. After 15 minutes...

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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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