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Electric furnace to converter steel making production process

A production process and electric furnace technology, which is applied in the field of continuous steelmaking electric arc furnace complete converter steelmaking production process, can solve the problems of converter steelmaking production cost gap, high production cost, large electrodes, etc., and achieve better dust removal effect and smoke The effect of reducing gas leakage and large economic efficiency

Inactive Publication Date: 2006-05-24
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this production process are: scrap steel and pig iron use more than 50%, electricity is the main heat energy, and a large amount of electrodes are consumed, the production cost is high, and there is a big gap with the production cost of converter steelmaking

Method used

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Examples

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Embodiment Construction

[0013] The electric furnace is a 90-ton CONSTEEL electric arc furnace, with a tapping capacity of 90 tons and 100 tons of charge, including 85 tons of molten iron, 15 tons of scrap steel and other cold materials, and the scrap steel is all small scrap steel.

[0014] Scrap steel addition: The total amount of scrap steel to be added is 15 tons. From the beginning of smelting, scrap steel is added to the furnace at a rate of 2 tons / min, so that the temperature of the remaining steel in the furnace drops rapidly to 1550-1580 ° C, and then the feeding speed is reduced to control at About 0.5 tons / min, the scrap steel is added about 5 minutes before the molten iron is added. If the temperature of the molten steel is too high before tapping, a small amount of scrap steel can be added to adjust the temperature.

[0015] Addition of molten iron: Add molten iron into the furnace through the molten iron chute about 2 minutes after scrap steel is added. The initial adding speed is prefera...

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Abstract

The invention relates electric furnace converting steel-making process technology that contains 80-90% molten iron, waste steel, pig iron and other cold burden 10-20%. The temperature of the molten iron in electric furnace is controlled to the range of 1550-1580 degree centigrade. The invention supplies a method of using molten iron to take the place of waste steel. Thus, it has great economic benefits, reduces the smoke and improves the operation environment.

Description

【Technical field】 [0001] The present invention relates to a continuous steelmaking electric arc furnace complete converter steelmaking production process, in particular to an electric furnace converter steelmaking production process in which a large amount of molten iron and a small amount of scrap steel are used in the composition structure of the charge without using electric energy . 【Background technique】 [0002] Glossary explanation: CONSTEEL: continuous steelmaking. [0003] The commonly used electric arc furnace steelmaking production process is mainly based on the cold charging scrap steel process. The composition of the furnace material is scrap steel, supplemented by pig iron, scrap iron and other metal materials, and assisted by oxygen blowing and adding slagging agent. The steel can be tapped out of the steel condition, and then refined outside the furnace. The disadvantage of this method is that it needs to consume a lot of electric energy to melt the charge. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/12C21C7/00
Inventor 王三武肖楚坚凌云张治跃毛永华彭雄茂肖方锦唐日升
Owner SGIS SONGSHAN CO LTD
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