The material of steelmaking furnace and why the steelmaking furnace will not be melted

The steelmaking furnace is mainly made of refractory materials, and the temperature of the steelmaking furnace is about 1600 ℃; Now let me introduce the material of steelmaking furnace and why the steelmaking furnace will not be melted.

There are mainly three kinds of steelmaking furnaces: open hearth furnace, converter and electric furnace. The lining materials of steelmaking furnace are all refractory materials, mainly including acid refractory silica (1700 ℃ high temperature resistant) and basic refractory magnesia carbon brick (2000 ℃ high temperature resistant); The steel making temperature in the steel making furnace is about 1600 ℃. Although the refractory material in the furnace liner is very thick, under the long-term corrosion of high temperature molten steel, a special machine needs to spray refractory materials to repair the damaged parts.

Steelmaking is to put pig iron into the steelmaking furnace for smelting according to a certain process to obtain steel; Generally speaking, steel refers to steel rolled into various steels.

Steelmaking refers to controlling the carbon content (generally less than 2%) during scrap smelting, eliminating harmful elements such as P, S, O, N, retaining or increasing beneficial elements such as Si, Mn, Ni, Cr, and adjusting the proportion of elements to obtain the best performance. At present, open hearth steelmaking has been basically eliminated in China, while the output of converter steelmaking accounts for 85% and that of electric furnace steelmaking accounts for 15%. With the development of technology and the requirement of environmental protection, the proportion of electric furnace steelmaking will be higher and higher.

The reason why the steelmaking furnace can withstand such high temperature is that the surface layer inside the furnace is coated with acid refractory or alkaline refractory, of which the acid refractory can withstand 1700 ℃ and the alkaline refractory can withstand 2000 ℃. In this way, the steelmaking furnace can avoid being melted at high temperature