Slag, also can be called slag dissolution. It is a kind of melt floating on the surface of metal and other liquid substances during pyrometallurgical process. Its composition is mainly consisted of oxide, such as silicon dioxide, alumina, calcium oxide, magnesium oxide, and often contains sulfide and a small amount of metal.

According to different metallurgical processes, slag can be divided into smelting slag, refining slag and synthetic slag. According to the properties of slag, it also can be divided into alkaline slag, acid slag and neutral slag. Slag plays an important role in metal smelting process, ensuring product quality and metal recovery rate. High phosphorus slag can be used as fertilizer, and the slag containing vanadium and titanium can be used as raw materials for extracting vanadium and titanium respectively. Some slag can be used for making slag cement, slag brick, slag glass, etc.

Liming Heavy Industry produces a variety of slag grinding equipment, including vertical mill, European type grinding plant, super pressure trapezium grinding mill, ultra-fine grinding mill, medium-speed micro-grinding mill, high pressure suspension grinding roller mill, Raymond mill, European type grinding mill, coarse grinding mill. This system takes advantages of simple technological process, high grinding efficiency, low energy consumption, low noise, easy to adjust product fineness, low pollution, simple maintenance and reliable operation.