A lime calcium oxide as the main component of air rigid inorganic cementitious materials. Lime is a product with a high content of calcium carbonate limestone, dolomite, chalk, lime and other shell wholesale, calcination by 900 ~ 1100 ℃. Lime related impacts: work should pay attention to protect the respiratory organs, dressed with dust fibers overalls, gloves, glasses and dust lime factory sealed and coated greasy ointment to prevent dust inhalation. There quicklime and slaked lime (ie lime), its magnesium oxide content (5% threshold) can be divided into calcium lime and magnesia lime. Because of its wide distribution of raw materials, production process is simple and low cost. A strong alkaline lime, quicklime processing at room temperature, can be active or activated alumina silica glass and the reaction to form the product has hard water, to produce cement. Therefore, lime is an important raw material in the building materials industry.