B - Operations – Transporting – 03 – D
Patent
B - Operations, Transporting
03
D
361/2
B03D 1/02 (2006.01) B03B 9/00 (2006.01) B03B 13/00 (2006.01) B03D 1/14 (2006.01)
Patent
CA 1258542
CONTROL OF FROTH CELL PERFORMANCE THROUGH THE USE OF DIFFERENTIAL BUBBLER TUBES ABSTRACT A method of controlling the separation of coal from a mixture of coal and refuse in a froth flotation device by measuring the differential back pressure between two gas bubbler tubes immersed to different depths into the body of pulp in the device to produce a first control signal representative of the pulp density, and adjusting the rate of addition of a froth enhancement addi- tive to the froth flotation device responsive to changes in said first signal; a second signal, produced by measuring back pressure of a single bubbler tube and representative of the pulp level in said device, can be corrected for changes in density by combining it with said first signal and then utilized to control liquid level in the cell by adjusting the rate of withdrawal of refuse therefrom.
489111
Sandbrook Thomas D.
Scandrol Roy O.
Conoco Inc.
Ridout & Maybee Llp
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