What is metallurgical waste

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Metallurgical slag refers to a variety of metallurgical industrial solid waste generated in the process. Mainly refers to the high iron smelting furnace slag generated; slag; various non-ferrous metal smelting slag produced, such as copper slag, lead slag, dross, slag and other Ni; red mud and alumina refining from bauxite discharged And a small amount of iron oxide slag produced during the rolling process. Each 1t of pig iron is discharged from 0.3-0.9t steel slag, and 0.1-0.3t steel slag is discharged per 1t of steel, and 0.6-2t of red mud is discharged per 1t of alumina. As early as in the 1940s, the international community has felt the urgency of solving the "slag damage" of metallurgical pollution. After efforts, steel slag has also reached a production balance in the 1970s, mainly used in the manufacture of various construction or industrial materials. China's metallurgical pollution utilization started relatively late. At present, the utilization rate of blast furnace slag is 70-85%, and the utilization rate of steel slag is only about 25%.

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