| 摘要 |
Fresh hot tailings, from the hot water extraction process for removing bitumen from oil sand, are treated to remove fine clay solids ("fines") in t he suspension. Ca(OH)2 lime is added to the suspension to reduce the stability of the clay-water colloidal structure. Then CO2 is injected to react with excess Ca++ and form water-insoluble CaCO3. The CaCO3 adsorbs fines and sediments them.
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