C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/59
C04B 14/00 (2006.01)
Patent
CA 1229099
METHOD OF PRODUCTION OF LIGHTWEIGHT AGGREGATES, CEMENT AND CEMENTITIOUS ADMIXTURES UTILIZING OIL SANDS SLUDGE Abstract A method of production of lightweight aggre- gates, cement and cementitious admixtures from the waste sludge produced in the oil sands oil recovery process or other similar bituminous waste sludges, such as those produced in in situ heavy oil production and tar sands tailings ponds, is disclosed. The method involves sepa- rating the primary tailings and filtering the secondary tailings utilizing ash from the combustion of the sludge to add to the filter cake. A secondary carbonaceous fuel may be added to the mixture which is dried, pellet- ized and sintered to produce the lightweight aggregate. The dried sludge/fuel mixture may be combusted to pro- duce ash for use in cement products or to utilize in the filtration process. Where limestone is added to the sludge, the mixture is suitable for converting to cement using a synthetic cement process.
473224
de Calonne Robert D.
Oyen Wiggs Green & Mutala
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