How To Use High Carbon Silicon

For a long time, the alloys used in converters have not been adjusted. The traditional alloy varieties have a relatively simple structure, that is, Q195 and Q235 steels use the MnSi+FeSi+SiAiCaBa+Sic+carburizer process, and HRB335 and HRB400 steels use the MnSi+Fesi+AiSi+carburizer production process.

However, the traditional silicon-manganese alloy and ferrosilicon resources are becoming increasingly scarce, and the market price has been rising, which has gradually increased the cost of converter steelmaking and reduced the profit margin of steel. In addition, the recovery rate of traditional alloys is greatly affected by the operation of the converter, and the steel output, terminal temperature and slag discharge amount cause large fluctuations in the alloy composition of the finished product. This leads to unstable chemical composition of smelting steel and low qualified rate of internal control indicators of finished products.

With the advent of high carbon silicon, more and more steel mills have begun to use high carbon silicon. The general rated particle size is 10-100mm (90%) or 10-60mm (90%), and the rated content is two kinds: 1. Silicon>65%, carbon>15%, 2. Silicon>68%, carbon>18%.

High carbon silicon can be added to the bottom of the converter before pouring the molten steel into the converter to ensure more complete and rapid melting.