Effect of limestone (absorbent) reactivity of FGD system performance: Features absorbers include not only its chemical composition, calcium oxide price, including the amount of base its reactivity, FGD system is by limestone powder to provide. Absorber activity will affect the speed of chemical reactions, calcium oxide manufacturers, is showing a conversion characteristic in an acidic environment. 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, calcium oxide, limestone can be divided siliceous limestone, clay, limestone and dolomitic limestone three. Chinese limestone rich in mineral resources, 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.