C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 2/12 (2006.01) C04B 2/10 (2006.01) F27B 15/00 (2006.01) F27D 13/00 (2006.01)
Patent
CA 2219505
The invention relates to a method for heat treatment of fine calcium carbonate bearing material comprising preheating fine material containing a coarse and a fine fraction. The preheated material is delivered into a fluidized bed (20) calcining means wherein the coarse fraction is calcined and the fine fraction is delivered by process air to an adjacent vertically arranged gas flash calciner furnace (60) in which it is calcined.
Cette invention concerne un procédé de traitement thermique de matériaux fins contenant du carbonate de calcium, lequel procédé consiste à préchauffer le matériau fin contenant une fraction fine ou brute. Ce matériau préchauffé est ensuite envoyé dans un système de calcination à lit fluidisé (20) où la faction brute est calcinée. La fraction fine est quant à elle envoyée par de l'air traité dans un four de calcination à éclair de gaz qui est situé à proximité et disposé verticalement, et dans lequel elle sera calcinée.
Cohen Sidney M.
Labelle Gerald J.
Lindquist William E.
Prokesch Michael E.
Flsmidth A/s
Fuller Company
Osler Hoskin & Harcourt Llp
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