Derek Parnaby Cyclones International Ltd
Co Reg. 1124062 (England)
Registered Office
Chilton Industrial Estate
Chilton nr Ferryhill
County Durham
DL17 0SH (UK)
TEL +44 (0)1388 720849
FAX +44 (0)1388 721415
enquiries@parnaby.co.uk
The process of froth flotation is effective for beneficiating of fine coal <0.5mm.
Fine coal can be separated from shale and other waste by the process of froth flotation.
The coal is made water repellent by the addition of a reagent such as oil, so that when a suspension of coal is agitated with air it sticks to the air bubbles and floats to the surface, collecting as froth.
Shale and other waste are not wetted by the reagent due to the different nature of their surface and hence do not stick to the bubbles and remain in the suspension to be drawn off the froth cells at a controlled rate, the froth is removed from the upper cell weir by the assistance of rotary paddles.