Lime deep processing: soda ash (Na2CO3) calcium chloride method. Metallurgical limestone calcium chloride aqueous solution of soda ash manufacturers can produce calcium carbonate precipitation. Alkaline: The production of caustic soda (NaOH) during the metallurgical limestone, precipitated calcium carbonate by-product can be obtained. 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. Influence of Limestone Flour for wet flue gas desulfurization performance: from the wet desulfurization process can be seen in the main reaction quality metallurgical limestone, to absorb and neutralize flue gas SO2, the key is the formation of Ca2 +, which and limestone or limestone component powder (mainly CaCO3 content), fineness, reactivity, etc. are closely related. Quality limestone has a direct impact on the performance of wet flue gas desulfurization.