Background of High Carbon Silicon/Silicon Carbon Alloy

For a long time, the alloy system of converter steelmaking has maintained a relatively stable structure, mainly relying on the process of MnSi+FeSi+SiAlCaBa+Sic+carburizer for Q195 and Q235 steels, while for HRB335 and HRB400 steels, MnSi+Fesi+AlSi+carburizer is used. However, this traditional silicon manganese alloy system has encountered challenges. The increasing scarcity of ferrosilicon resources and the continuous rise in prices have directly pushed up the cost of converter steelmaking and compressed the profit margin of steel. In addition, the recycling rate of traditional alloys is affected by the operating conditions of the converter, such as the uncertainty of steel output, terminal temperature and slag amount, which leads to large fluctuations in the alloy composition in the finished product, which in turn affects the chemical composition stability of the smelted steel and reduces the qualified rate of the internal control indicators of the finished product.

This situation calls for innovation in alloy structure to cope with resource shortages and cost pressures. In order to achieve a more efficient and economical steelmaking process, it is necessary to explore new silicon carbon alloy systems, seek alternative resources, optimize process flow, improve alloy recycling rate, ensure precise control of chemical composition, and thus improve product quality and market competitiveness.

With the advent of high carbon silicon, more and more steel mills have begun to use high carbon silicon.

High carbon silicon, also known as silicon carbon alloy, is a subsidiary product of metallic silicon. When producing metallic silicon, the temperature near the furnace bottom and furnace wall cannot stably reach the original standard temperature for completely melting metallic silicon, resulting in more and more metallic silicon that has not completely reacted chemically originally sticking to the furnace bottom and furnace wall, so high carbon silicon is produced.