B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
B03B 9/02 (2006.01) B03D 1/10 (2006.01) B03D 1/14 (2006.01)
Patent
CA 2049793
An aperture is formed in the bottom wall of the launder. A downwardly extending container communicates with the aperture. A weir is positioned immediately downstream of the aperture. The container and weir combine to form a separator. In the launder, free water and solids contaminants settle and form a bottom layer of dirty water. The layer is diverted into the container through the aperture and the weir temporarily retains a small head of it. Temporary retention in the separator therefore generates a vertical fluid column comprising an upper layer of relatively clean froth and a lower layer of dirty water, said layers having an ascertainable interface. The elevation of the interface is monitored and contaminated fluid is withdrawn from the container as underflow at a rate controlled to keep the interface elevation substantially constant. The froth overflowing the weir is reduced in water and solids relative to the original froth issuing from the flotation vessel.
Betts Malcolm S.
Dougan Patrick D.
Jansen Wayne
Larson Gordon R.
Thompson Gordon R.
Alberta Energy Company Ltd.
Betts Malcolm S.
Canadian Occidental Petroleum Ltd.
Dougan Patrick D.
Esso Resources Canada Limited
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