Calcining calcium sulphate dihydrate

Details Calcining calcium sulphate dihydrate Calcining calcium sulphate dihydrate

C - Chemistry, Metallurgy

04

B

39/34, 39/52

C04B 11/02 (2006.01) C01F 11/46 (2006.01) F27B 17/00 (2006.01)

Patent

CA 1044014

ABSTRACT A method and apparatus for calcining calcium sulphate dihydrate in a calcination vessel in which the dihydrate is heated in the vessel to calcination temperature not only by heat applied to the exterior of the vessel but also by hot gas, especially hot gaseous combustion products, supplied into the interior of the mass of calcining material within the vessel. The supply of hot gas according to the invention can improve the production rate in both batch and continuous calcination operations without adversely affecting the product quality, by permitting increase in the heat input to the vessel without entailing the risk of vessel bottom burn-out.

213730

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