1916] TREATMENT OF MOLYBDENUM ORES IN CANADA 287 
mixer in order to keep the solid matter in suspension. From the mixer, 
the pulp flows to the rougher cell ‘“B”’ into which air is blown and 
atomized through a porous cloth material on the bottom of the cell. 
Tailings are discharged from ‘‘B”’ through a bottom port controlled by 
a float valve, while the valuable sulphide, a rough concentrate, proceeds 
to a cleaner cell ‘“‘C’’ where it undergoes a cleaning retreatment. The 
cleaner cell discharges tailing still containing valuable mineral to the 
mixer tank ‘‘A’’ and a finished concentrate which is delivered to a filler 
press. A Standard unit is said to treat from 35 to 75 tons per 24 hours 
depending upon the nature of the ore. 
