The Investigation of the Hydratation of Semi-hydrate Phosphogypsum by Thermal Analysis Methods
Keywords:semi-hydrate phosphogypsum, hydratation, thermal analysis, mineral fertilizers.
By applying the method of thermal analysis it was investigated the kinetics of the hydration process of semi-hydrate phosphogypsum, which is a waste, generated in the production of extractive orthophosphoric acid in JSC Lifosa. The mineralogical composition of phosphogypsum (CaSO4 ⋅ 0.5 H2O and CaSO4 ⋅ 2 H2O) under hydration was calculated. The heat quantity consumed during the dehydration of phosphogypsum was established, and the mechanical and physical properties of semi-hydrate phosphogypsum were analysed also.
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