Effect of particle size on the flocculation behaviour of ultra-fine clays in salt solutions
نویسنده
چکیده
Currently, two commercial plants are operating to produce ~20% of Canada's petroleum requirements from the Athabasca oil sands deposit in Alberta. The hot water extraction process is used to extract the bitumen from this resource. During processing, mechanical dispersion forces cause mobilization of ultra-fine clays into the process water (Kotlyar et al., 1992a, 1993). The resulting slurry is transported to sedimentation ponds where the U/F interact with naturally occurring salts present in the water to form thixotropic gels that ultimately produce mature fine tailings (MFT) with a high water holding capacity. In previous corcmmnlcatzon5 t ,~ , ,~ -, 9 ~,:,o, 1996) we reported on aggregation of U/F particle mixtures having a broad range of sizes. The work presented here comprises a fundamental study of the colloidal characteristics of narrow particle size
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