Steel-making production deoxidizing agent and production process thereof

Abstract

The invention relates to a steel-making production deoxidizing agent and a production process thereof, and is characterized in that the deoxidizing agent is a mixture prepared by the following raw materials by the weight percentage: 40-45% of aluminum, 25-35% of a limestone powder, 2-3% of polyvinyl alcohol, 5-8% of industrial starch, and 2-5% of a bentonite powder. The production of the deoxidizing agent comprises the following steps: mixing the raw materials; granulating; and drying: carrying out drying treatment on the deoxidizing agent particles after molding at the temperature of 100-200 DEG C. The steel-making production deoxidizing agent has simple production process, and does not produce three-waste pollution in the production. With use of the deoxidizing agent, oxygen in molten steel can be removed, and the deoxidizing agent can undergo a reaction with deoxidation products to form low-melting silicate compounds, a steel slag layer is caused to float upward and be separated, and inclusions in the molten steel are effectively removed, so that the function of purifying the molten steel is achieved, the occurrence of flocculant flow at a continuous casting water gap is avoided, the number of continuous casting tanks can be increased, the quality of steel is improved, on-site operation is facilitated, and raw material consumption is reduced.

Description

technical field [0001] The invention belongs to a deoxidizing material used in steelmaking production in the metallurgical industry, and in particular relates to a molten steel purifying agent and a production process thereof. Background technique [0002] At present, the deoxidizers used in steelmaking in the domestic metallurgical industry are mainly ferromanganese, ferrosilicon, and silicomanganese, and the final deoxidizers are mainly aluminum and aluminum alloys. Deoxidize with aluminum and aluminum alloy, the deoxidized product a—AL 2 o 3 , which belong to microscopic inclusions or ultramicroscopic inclusions, are not easy to be excluded from molten steel and affect the quality of steel. Converter steelmaking deoxidizer is composed of Ca, Si, and C. Its function is to improve the quality of steel and reduce impurities in steel. However, because it contains SiC, it is not suitable for steel types with low Si and C content. In foreign countries, Mn is directly added t...

AI Technical Summary

Problems solved by technology

Deoxidize with aluminum and aluminum alloy, the deoxidized product a—AL 2 o 3 , belonging to microscopic inclusions or ultra-microscopic inclusions, which are not easily removed from molten steel and affect the quality of steel

Converter steelmaking deoxidizer is composed of Ca, Si, and C. Its function is to improve the quality of steel and reduce impurities in steel. However, because it contains SiC, it is not suitable for steel types with low Si and C content.