Submerged combustion calcination

Details Submerged combustion calcination Submerged combustion calcination

1985-04-25

1986-12-02

Camby, John J.

Heating

With heating gas conveying, agitating, scattering or...

106109, 423171, F27B 1500, C04B 1100, C04B 1102

Patent

active

046261990

ABSTRACT:
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.

REFERENCES:
patent: 3542347 (1970-11-01), Goldney et al.

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