Method for smelting weathering steel

Abstract

The invention relates to a method for smelting weathering steel, which is characterized by comprising the following steps: 1) converter loading; 2) converter slagging; 3) gun position control and oxygen supply. The weathering steel is copper based phosphorus weathering steel, and specially comprises the following components in percentage by weight: 0.12-0.21% of C, 0.5-2.0% of Si, 0.7-2.0% of Mn, less than or equal to 0.036% of S, less than or equal to 0.034% of P, 0.20-0.40% of Cu, less than 0.2% of Al, and the balance of Fe and trace impurities. Compared with original smelting processes, the method provided by the invention has the advantages that the application amount of lime per converter is reduced by 4.5 t, the amount of slag is reduced by 9 t, the iron loss in slag is reduced by about 2.7 t, the application amount of sheet copper is reduced by 150 kg, and the cost of steel per ton is reduced by over * Yuan. According to the invention, the cost of iron loss in the process of converter smelting can be reduced, the cost of copper alloying can be reduced, and a converter low-cost smelting process for copper based phosphorus weathering steel can be implemented.

Description

technical field [0001] The invention relates to a method for smelting weather-resistant steel. Background technique [0002] Maanshan Iron and Steel has developed weathering steel products mainly in the 09CuP series since the H-shaped steel was put into production. With the commissioning of the CSP production line, weathering steel plates represented by container plates have also become the main weathering steel products of Maanshan Iron and Steel. The financial crisis broke out Afterwards, the output of weathering steel such as containers has declined. In recent years, under the control of the national macro economy, the container board market has gradually improved, and orders for weathering steel products have continued to increase. However, due to the overall environment of the steel market and the characteristics of weathering steel products , the benefit of weathering steel products has been poor, how to reduce the production cost of weathering steel products to obtain...

AI Technical Summary

Problems solved by technology

[0002] Maanshan Iron and Steel has developed weathering steel products mainly in the 09CuP series since the H-shaped steel was put into production. With the commissioning of the CSP production line, weathering steel plates represented by container plates have also become the main weathering steel products of Maanshan Iron and Steel. The financial crisis broke out Afterwards, the output of weathering steel such as containers has declined. In recent years, under the control of the national macro economy, the container board market has gradually improved, and orders for weathering steel products have continued to increase. However, due to the overall environment of the steel market and the characteristics of weathering steel products , the benefits of weathering steel products have been poor, how to reduce the production cost of weathering steel products to obtain greater economic benefits has become the research goal of each production