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CaSO4 + 2NH4HCO3 = CaCO3↓+ (NH4)2SO4 + CO2↑+ H2O

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(NH4)2SO4 + 2KCl = K2SO4 + 2NH4Cl

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CaSO4 = CaO + SO2 + O2 �� 116860��

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CaSO4 + 2C = CaS + CO2

CaS + 3CaSO4 = 4CaO + 4 SO2

2CaSO4 + C = 2CaO + 2 SO2 + CO2

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