Influence of Limestone Flour for wet flue gas desulfurization performance: from the wet desulfurization process can be seen in the main reaction Henan metallurgical lime factory, to absorb and neutralize SO2 in the flue gas of Henan metallurgical lime manufacturers, the key is the Ca2 + forming Henan metallurgical lime factory, this and limestone or limestone powder ingredients (mainly CaCO3 content), fineness, reactivity, etc. are closely related. Quality limestone has a direct impact on the performance of wet flue gas desulfurization. Lime deep processing: carbonization. Calcination of limestone and other raw materials will generate lime (calcium oxide main ingredient) and carbon dioxide Henan metallurgy factory with lime, lime water to digest calcium hydroxide, and then with carbon dioxide, carbonation lime to produce calcium carbonate precipitation, and then precipitated calcium carbonate by dehydration, dried and then pulverized lime-mill will obtain PCC.