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Calcium carbide residue mainly composed of Ca(OH)2 can be used in wet flue gas desulfurization (FGD). Different from the traditional limestone–gypsum wet FGD, calcium carbide residue rapidly reacts with SO2 and generates numerous fine particulates. For the fine calcium sulfite particulates, the oxidation rate to CaSO4 is much lower than the sulfite formation rate, resulting in a low fraction of CaSO...
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