Composition and general characteristics of limestone: Limestone is one of the most widely distributed minerals in the earth's crust. According to the different components contained in the ore, lime powder, limestone can be divided siliceous limestone, clay, limestone and dolomitic limestone three. Chinese limestone rich in mineral resources, how much money one ton of lime powder as cement, solvents and chemicals for industrial use has reached eight hundred at the limestone deposit. Origin throughout the provinces, municipalities and autonomous regions can be found in the vicinity of the industrial area of ??local materials. In order to meet the desired properties of lime products, for a long time, the production of metallurgical lime or lime select the main raw material, lime powder processing plants, based mostly dense limestone, lime powder plant, namely 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.