Calcined lime according to the different levels, types and can be divided into: light (soft) burnt lime, hard burnt lime and dead-burned lime. Light (soft) means burnt lime: lime in an instant after calcination of limestone powder, with a so-called active properties. Concept in lime, used to distinguish between different types of them, the most obvious way is to different degrees of activity. In order to meet the desired properties of lime products, for a long time, the production of select lime or limestone powder metallurgy lime supply the main raw material, mostly dense limestone dominated much money one ton of limestone that ordinary limestone. Because the most important feature of dense limestone is reflected in the crystal structure and texture Hardness smaller it has a dense fine particles are calcined lime ideal raw materials.