Explanation
The process of reducing the sulfur content in molten iron or molten steel during the melting of steel is harmful to most steel grades. Sulfur is a harmful element, which will reduce the processability and mechanical properties of steel. Therefore, the sulfur content in steel should be strictly controlled. During steel production, sulfur mainly comes from ores, flux and fuels, so necessary desulfurization measures should be taken at every stage of smelting, including blast furnace desulfurization, hot metal pretreatment desulfurization, steelmaking desulfurization and off furnace refining desulfurization. High temperature, high alkalinity, low iron oxide slag and reducing atmosphere are conducive to desulfurization. The common desulfurizer is lime (mainly composed of CaO). In some cases, calcium carbide (CaC2), soda (Na2CO3), metal magnesium based desulfurizer, etc. can also be used. The sulfur in the metal sulfide can also be removed by oxidizing roasting to transformation it into metal oxide.
Classification
No classification at present.