Method for producing insoluble calcium sulfate anhydrite

Details Method for producing insoluble calcium sulfate anhydrite Method for producing insoluble calcium sulfate anhydrite

1975-06-30

1978-03-21

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

C04B 1102

Patent

active

040804224

ABSTRACT:
Naturally occurring or man-produced calcium sulfate dihydrate is subjected to a process which involves concomitant flash calcination, utilizing co-current contact of the gypsum with a gaseous heat source, and self-comminutation to produce the insoluble calcium sulfate anhydrite in relatively pure and finely comminuted form without the use of specially-sized feed rock and extensive mechanically motivated grinding of the product required by prior means known in this art.

REFERENCES:
patent: 1746294 (1930-02-01), Tyler
patent: 3221082 (1965-11-01), Leatham et al.
patent: 3312455 (1967-04-01), Chassevent et al.
patent: 3648994 (1972-03-01), Remmers et al.
patent: 3773892 (1973-11-01), Reimann et al.
patent: 3829280 (1974-08-01), Jenne et al.
patent: 3862294 (1975-01-01), Engelhart et al.

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