How To Use High-carbon Silicon

The alloys used in the converter have not been adjusted for a long time. The microstructure of traditional alloys is relatively simple, that is, Mnsi+FeSi+SiAiCaBa+Sic+ carburizing process is used for Q195 and Q235 steels, and Mnsi+FeSi+ AiSi+ carburizing process is used for HRB335 and HRB400 steels. With the increasing scarcity of ferrosilicon resources and the rising market price, the cost of converter steelmaking is gradually increasing, and the profit rate of steel products is gradually decreasing. In addition, the recovery rate of conventional alloys is greatly affected by converter operation. The composition of finished alloy fluctuates greatly due to factors such as steel output, terminal temperature and slag drop. The chemical composition of the steel is unstable, and the qualified rate of the finished internal control index is low.

With the emergence of high-carbon silicon, more and more steel mills began to use high-carbon silicon. Generally, the rated grain size is 10-100mm(90%) or 10-60mm(90%). Classification content is divided into two types :1. Silicon :65% is the least, carbon :15% is the least,2. Silicon :68% is the least, carbon :18% is the least.

Before the molten steel is poured into the converter, high carbon silicon can be added to the bottom of the converter to ensure fuller and faster melting.