Methods of Improving the Yield of Iron and Steel Material in Electric Arc Furnace Steelmaking

Abstract

The invention discloses a method for improving the yield rate of electric arc furnace steelmaking iron and steel material, which solves the problem of low yield rate of electric arc furnace steelmaking. Including batching, electric arc furnace steelmaking and steel tapping steps, in the batching step, the iron and steel material is mixed into pig iron with a material weight of 20-25%, and then carbon balls are mixed into the furnace according to the ton weight of the mixture of 8-15kg; In the electric arc furnace steelmaking step, the materials are fed in batches. After each feeding and power transmission to form a molten pool, a carbon-oxygen gun is used to spray carbon powder to create foam slag, and oxygen is blown synchronously to help the melting until the last batch of materials is loaded; finally Submerged arc operation is carried out after the primary material is loaded: after all the furnace material is melted and before the steel is tapped, spray carbon powder with a carbon-oxygen gun to create foam slag and blow oxygen with an oxygen tube to help melt; control the temperature of the electric arc furnace to ≥1560°C, 0.6-0.8MPa, the total powder spraying amount is 1-2kg per ton of charge, and the thickness of the slag layer of the foamed slag is kept ≥ 200mm. The invention can effectively improve the steelmaking yield of the electric arc furnace.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a method for improving the yield of steel materials in electric arc furnace steelmaking. Background technique [0002] The electric arc furnace uses scrap iron and steel materials to smelt molten steel, which usually includes batching, electric arc furnace steelmaking and discharging process. The smelting production of molten steel has relatively high efficiency. [0003] However, in the smelting process, there are oxidation loss and slag coil loss of molten steel, which makes the yield of steel material in electric arc furnace low, which leads to high cost per ton of steel. With the market's requirements for competitiveness, the cost control per ton of steel is becoming more and more stringent, and it is necessary to further improve the yield of steel materials in electric arc furnace steelmaking. SUMMARY OF THE INVENTION [0004] The purpose of the present invention i...

AI Technical Summary

Problems solved by technology

[0003] However, in the process of smelting, there are oxidation loss and slag volume loss of molten steel, which makes the yield of electric arc furnace steel material low, which leads to high cost per ton of steel