Lime production method

Details Lime production method Lime production method

C - Chemistry, Metallurgy

04

B

C04B 2/10 (2006.01) D21C 11/00 (2006.01) D21C 11/04 (2006.01)

Patent

CA 2123016

16 ABSTRACT OF THE DISCLOSURE Lime mud from kraft pulp recovery operations is processed using dielectric hysteresis heating, in a two- stage operation, in which wet lime mud first is dried then the dried lime mud is decomposed to lime and carbon dioxide. A two-zone lime mud calciner is employed in which the lime mud is conveyed horizontally, with drying being effected in the first zone and then decomposition being effected in the second zone. A co-current flow of purge air removes steam generated in the first zone and a counter-current flow of purge air removes carbon dioxide generated in the second zone so as to avoid the formation of TRS from the moist lime mud.

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