Activated lime is widely used in the steel, alumina, magnesium metal, calcium carbide, and power plant desulfurization and papermaking industries. Activated lime is an important auxiliary raw material for steelmaking, and its use has a series of characteristics such as improving the quality of molten steel, increasing production, reducing steelmaking consumption and costs, and stabilizing operations. Practice has proven that enterprises that use activated lime for steelmaking have achieved significant economic benefits. In recent years, China's production of lime for steelmaking has increased by 40%, but the proportion of high-grade lime with an activity of over 300ml has increased from 27% of the total amount of steelmaking lime to 29.5%, an increase of only 2.5%. Jiangsu Pengfei Group's activated lime rotary kiln, based on the introduction and digestion of advanced foreign technology, has formed a series of products with a daily output of 1000 tons, which are exported to Vietnam, Russia, Central Africa and other countries.