Effect of limestone (absorbent) reactivity of FGD system performance: Features absorbers include the chemical composition of high-quality metallurgical limestone Not only that, but also the reaction of metallurgical limestone base amount of active offer, FGD systems is provided through the limestone powder . Absorber activity will affect the chemical reaction rate, it is an indication of the conversion feature in an acidic environment. Lime deep processing: soda ash (Na2CO3) calcium chloride method. An aqueous solution of calcium chloride is added in soda ash, calcium carbonate precipitation can be generated. Alkaline: The production of caustic soda (NaOH) during the metallurgical limestone price obtained by-product precipitated calcium carbonate. Soda lime added to the aqueous solution to generate calcium carbonate precipitate, and also get the caustic soda solution, and finally precipitate calcium carbonate by dehydration, drying and grinding it to obtain PCC.