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how toproduce gypsum ppauder prodaction in factroy pdf

how toproduce gypsum ppauder prodaction in factroy pdf

To produce plasters or wallboard gypsum must be partially dehydrated or calcined to produce calcium sulfate hemihydrate CaSO4 ½H 2O commonly called stucco A flow diagram for a typical gypsum process producing both crude and finished gypsum products is shown in Figure 11161 In this process gypsum is crushed dried ground and calcined

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