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Measurements have been made of the rate of dehydration of desulphurized gypsum with particle diameters in the range of 35–67 μm in a fluidized bed reactor. Experiments were carried out at bed temperatures of 100 to 170°C. The fluidizing gases were air, with water vapour pressures of between 0.001 atm and 0.35 atm, and carbon dioxide. The results show that the dehydration under all these conditions...
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