Why do you say that everything is tempered into steel? What are the main chemical reactions in steelmaking?

Steelmaking is to blow oxygen into molten pig iron, which contains impurities such as silicon oxide and manganese. In the process of oxidation, a lot of heat is released.

(containing 1% silicon can increase the temperature of pig iron by 200 degrees Celsius), which can make the furnace reach a high enough temperature. Therefore, converter steelmaking does not need to use additional fuel. The basic tasks of steelmaking are decarbonization, dephosphorization, desulfurization, deoxidation, removal of harmful gases and nonmetallic inclusions, temperature rise and composition adjustment. It can be summarized as "four divisions" (carbon, oxygen, phosphorus and sulfur), "two divisions" (degassing and impurity removal) and "two adjustments" (composition and temperature). The main technical means adopted are: oxygen supply, slagging, heating, adding deoxidizer and alloying operation. This topic will introduce the technological process of converter steelmaking production, the working principle and control requirements of main process equipment in detail.

C+O2== Ignition ==CO2

Silicon+oxygen = = ignition = = silicon dioxide