Pond sludge bitumen and ultra fines agglomeration and recovery

Details Pond sludge bitumen and ultra fines agglomeration and recovery Pond sludge bitumen and ultra fines agglomeration and recovery

B - Operations, Transporting

01

D

B01D 17/022 (2006.01) B03B 9/02 (2006.01) C10G 1/04 (2006.01)

Patent

CA 2666025

Ultrafine, bi-wetted and bitumen particles are the reason why oil sand fluid tailings will not compact much beyond 30 weight percent solids in a mined oil sands tailings pond. Most of these particles are gel forming or block the flow of water out of clay card house structures comprising the fluid tailings. A bitumen agglomerating and kneading method and apparatus are disclosed in which multivalent cations serve to trap ultrafine and bi-wetted particles into the bitumen phase which bitumen is then separated from the fluid tailings by a revolving apertured oleophilic wall. The resulting effluent may be used as recycle water after the minerals are settled and compacted. Care is taken to minimize the accumulation of cations and corrosive components in the effluent. The bitumen product is either discarded or is deasphalted to prevent the return of ultrafine and bi-wetted particles to a tailings pond that provides recycle water to an oil sands extraction bitumen froth flotation plant.

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