| 摘要 |
<p>Oil bearing sands recovery process comprising a main separation stage. The oil bearing sands is slurried in the main separation stage with water to produce an enriched fraction and a dilute aqueous clay waste. The aqueous clay waste is sedimented in a waste sedimentation stage in one or more settling lagoons to provide a substantially solid clay sediment and supernatant. The dilute aqueous clay waste is fed into a well and flocculated by addition of a polymeric flocculant. The flocculated dilute aqueous clay sediments to provide a pumpable thickened clay sediment layer in the base of the well.</p> |
