Modern simple plants, which gravity feed flotation concentrate directly from the flotation cell launder onto filters, usually do not provide sufficient shear for floc mixing, or residence time for floc formation. This is believed to lead to over flocculation. 13.3.2 Fractional dewatering approach and coarse addition
the distribution of valuable material in the cyclone overflow stream undergoes a step change when the flash circuit is taken off line with an increase in the amount of valuable fines being generated, which is further reflected in the flotation tails with a higher proportion of both pyrite and gold being present in
Mechanical Fine Gold Flotation Cell Initially our interest arose from a need, in the laboratory, to pre concentrate a sample prior to analysis, either to enhance the confidence in the analysis or to facilitate morphological characterisation. A Wemeco Fagergren machine with a 2 litre cell was used.
GOLD FLOTATION The flotation process, which is today so extensively used for the concentration of base metal sulphide ores and is finding increased use in many other fields. In 1932 flotation plants began to be installed for the treatment of gold and silver ores as a substitute for or in conjunction with cyanidation.
The flotation circuit consists of a one stage rougher and a two stage cleaner with a two stage scavenger. A concentrate with an average grade of 30.0 g/t gold was obtained using the mechanical flotation cell process, while the total recovery was between 90 and 95%.