B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/64 (2006.01) B01D 53/04 (2006.01) C04B 11/02 (2006.01)
Patent
CA 2702631
A method for providing effective mercury release control during gypsum calcination is disclosed. The method comprises providing a reactor and gypsum containing mercury; providing a mercury sorbent, such as activated carbon and/or derivatives thereof in the reactor; and calcining the gypsum in the reactor to form stucco. The mercury contaminant present in the gypsum is sorbcd by the mercury sorbent during the calcination process. The mercury content of the stucco is substantially similar in amount to the mercury content of the uncalcincd gypsum.
L'invention concerne un procédé pour fournir un contrôle efficace de la libération de mercure pendant la calcination du gypse. Le procédé consiste à fournir un réacteur et du gypse contenant du mercure ; fournir un absorbant de mercure, tel que du charbon actif et/ou des dérivés de celui-ci dans le réacteur ; et calciner le gypse dans le réacteur pour former du stuc. Le contaminant mercure présent dans le gypse est absorbé par l'absorbant de mercure pendant le procédé de calcination. La teneur en mercure du stuc est essentiellement similaire en quantité à la teneur en mercure du gypse non calciné.
Luan Wenqi
Company United States Gypsum
Moffat & Co.
LandOfFree
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