Then the last chapter tells us Rotary Kiln slagging conditions, we describe the other two methods with the continuous development of smelting technology, in order to enhance the role of limestone slag process, reducing the limestone in the converter of the reaction process, as This first through limestone calcination Rotary kiln, calcium carbonate, calcium oxide decomposition at high temperatures, which is usually referred to lime.This is the lime used for slagging process, the effect of that is really from unusual. Opt silicate slag in the molten steel, while the purpose of the silicate slag can play, but it also increased the amount of slag, the slag increases the work burden.Opt fluorite slag in the molten steel, this process has a deficiency, on the one hand increases the amount of slag slag fluorite, fluorite slagging other serious erosion of the lining.