Coal-iron ore microwave reduction and electric furnace steel-making method and equipment

An iron ore and microwave technology, applied in the field of direct reduction short-process steel production, can solve problems such as pollution and scrap steel will not be alleviated, and achieve the effects of simple process, high practical value, and rational use of natural resources and energy.

Inactive Publication Date: 2003-03-19
任瑞刚 +3
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Problems solved by technology

[0002] Direct reduced iron, instead of scrap steel as raw material for steelmaking, is an indispensable raw material for the production of high-quality steel and pure steel. In the next 6-8 years, the formation of scrap steel in my country will still not increase significantly, and the insufficient supply of scrap steel will not be resolved in the near future. Alleviation, my country imports more than 2 million tons of scrap steel every

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  • Coal-iron ore microwave reduction and electric furnace steel-making method and equipment
  • Coal-iron ore microwave reduction and electric furnace steel-making method and equipment
  • Coal-iron ore microwave reduction and electric furnace steel-making method and equipment

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Example Embodiment

[0024] To make one ton of steel, weigh 470 kilograms of standard coal, 1,540 kilograms of magnetite powder, and 225 kilograms of lime powder, pulverize coal and lime to a particle size of ≤3mm, mix with powdered magnetite, and then densely spread into the microwave heating reaction moving bed , Energize and heat to 1200℃ for 20 minutes to reduce the magnetite to reduced iron material with 95% metallization rate, push it into the electric arc furnace and add 70 kg of standard coal, heat to 1500℃, smelt for 1.5 hours, The steel slag is separated, and 1 ton of qualified steel is obtained. The water quenched steel slag can be used as cement raw material or additive. The steel is sent to the refining furnace to smelt different steel grades.

[0025] The features of the present invention are as follows:

[0026] (1) In the smelting reduction process, it is necessary to effectively and reasonably combine the use of primary energy and secondary energy. The primary energy (coal) is the red...

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Abstract

The present invention is microwave reduction and electric furnace steel-making method and equipment. Certain amount of coal, iron ore and flux and mixed, set on microwave heating bed and heated to 800-1300 deg.c for 10-20 min to produce reduced iron material; and the iron material is heated in an electric arc furnace to 1400-1600 deg.c for 1-2 hr and slag-steel separated. The equipment includes microwave heating movable bed with refractory inner wall, protecting outer metal wall, microwave heater between the inner wall and the outer wall, air cooling circulator between the two walls, mixing feeder over the movable bed and high temperature discharger. The present invention has less investment, simple process, high efficiency, low power consumption and no waste exhaust and is suitable for production in different scale.

Description

(1) Technical field [0001] The invention relates to a coal-iron ore microwave reduction-electric furnace direct steelmaking method and equipment. The reduced iron produced by microwave heating is directly fed into the electric arc furnace to refine high-quality steel. method. (2) Background technology [0002] Direct reduced iron, instead of scrap steel as raw material for steelmaking, is an indispensable raw material for the production of high-quality steel and pure steel. In the next 6-8 years, the formation of scrap steel in my country will still not increase significantly, and the insufficient supply of scrap steel will not be resolved in the near future. Alleviation, my country imports more than 2 million tons of scrap steel every year, hot metal is a high-purity and high-energy raw material for electric furnace steelmaking, but the prerequisite for electric furnace heating molten iron is to have a long-term and stable source of hot metal, and environmental pollution iss...

Claims

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Application Information

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IPC IPC(8): C21B13/12
Inventor 任瑞刚陈津刘全营刘浏
Owner 任瑞刚
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