Characteristics of the active lime: lime is a chemical properties and lively, and strong ability to respond, in the process of steelmaking slag metallurgical melting fast how much money one ton of lime containing S, P less harmful elements such as quality of soft-burnt lime. Quality of the merits of its main uses "the degree of activity," the indicators. The degree of activity reflects the lime in the slag and other materials response capability. The role of lime in steelmaking: Lime in steelmaking, especially in basic electric arc furnace, mainly used for "slagging agent", to remove harmful elements in the molten steel S, P and other impurities buy metallurgical lime, optimized steel quality. Steelmaking slag generated in the supply of metallurgical slag lime, whose main component is (4CaO · P2O5) and (CaS), continue the process of removing the slag from molten steel to achieve the purpose of removing sulfur and phosphorus.