Iron in the steelmaking furnace can be changed into molten iron, so how is the steelmaking furnace cast? Why won't it melt?

1. blast furnace ironmaking, converter steelmaking, so steelmaking is molten iron into molten steel, blast furnace iron ore, iron powder into molten iron.

2. The shell of the converter is just a layer of steel skin, which is covered with refractory bricks (bricks that can resist high temperature and keep the furnace from melting), while the blast furnace directly uses refractory bricks.

3. Why won't it melt? Because the temperature is not enough, since it is used to make steel, the temperature that refractory bricks can withstand must be higher than the melting point of steel. Otherwise, the steel has not melted, and the bricks have melted first. How are they melted? (Generally, the melting point of steel is around 1500℃, and the melting point of refractory bricks is above 1700℃. )

When molten iron and molten steel are smelted, they directly contact with refractory bricks, which will not melt them, so the furnace will not melt. When steel turns into water, it will swim in the furnace (melt into liquid and flow), and the refractory bricks will be washed away continuously. This kind of friction will make the refractory bricks thinner and thinner, so the refractory paint "repair furnace" operation (refractory paint that melts in water and solidifies rapidly) is carried out.