C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
23/82
C04B 11/00 (2006.01) C01B 17/98 (2006.01) C04B 18/04 (2006.01)
Patent
CA 1108820
ABSTRACT Aqueous alkaline desulfurization treating units for combustion gases generate as a product an aqueous sludge containing sulfur compounds of calcium. Many such sludge products contain more than 30 percent by weight (of the solids) of calcium sulfite hemihydrate. These waste products are in part calcined at a temperature from 250°C to 650°C to produce a moisture-free, cementitious product which is thereafter recombined with uncalcined aqueous sludge to produce a cementitious product which can be profitably utilized or which may be conveniently discarded as a land fill. If desired, fly ash or bottom ash produced in the combustion process can be combined with the cementitious product.
308133
Swabey Ogilvy Renault
Valiga Richard E.
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