CaO content > 90, MgO content < 0. 5 SiO₂ < 1. 0 S content < 0. 06

P content < 0. 002

Activity > 300 Particle size is 10~70 mm.

Widely used in many fields, such as metallurgy, chemistry, sewagetreatment, desulfurrization in gas, construction dope, paper-making , plastic, rubbish burning, neutralisation etc.