Lime deep processing: linking calcium method. Calcium chloride solution was treated with hydrochloric acid to obtain lime, lime powder, calcium chloride solution after inhaling ammonia with carbon dioxide carbonation will get precipitation of calcium carbonate. Lime Quality: The lime produced cementitious ingredients are effective calcium oxide and magnesium oxide, its content is the main indicator of the quality assessment of limestone. Composition and general characteristics of limestone: limestone mineral composed mainly of calcite (the main component is CaCO3), and accompanied by dolomite, magnesite and other carbonate minerals, lime powder quotes, also mixed with some other impurities. Limestone has a good workability, polished and well cementing properties, insoluble in water, high-quality lime powder, soluble in acid, can react with a variety of strong acids and the formation of the corresponding calcium salt, and release CO2.