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BACKGROUND
This work aims to investigate the possibility of recycling by‐product phosphogypsum (PG) as raw material for preparing α‐calcium sulfate hemihydrate (α‐CSH) in chloride‐free salt solution under mild conditions. The dehydration of PG in a concentrated Ca(NO3)2 solution at 97 °C under atmospheric pressure was analyzed. The effect of Al2(SO4)3 on the phase‐transition kinetics as well as succinic...
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