Submerged combustion calcination

Details Submerged combustion calcination Submerged combustion calcination

F - Mech Eng,Light,Heat,Weapons

27

B

23/103, 39/34

F27B 15/02 (2006.01) C04B 11/028 (2006.01)

Patent

CA 1239271

IMPROVED SUBMERGED COMBUSTION CALCINATION Abstract of the Disclosure Gypsum is calcined by contacting it with the hot gases spewing out of a combustion tube submerged in the mass of gypsum. The formation of dead-burned anhydrite is reduced by surrounding the combustion tube with a second tube called a draft tube. Gypsum passing through the annulus between the tubes is heated by the hot gases and is ejected from the annulus to prevent repeated excursions into the hot gas zone at the muzzle of the combustion tube.

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