Separation method and apparatus

B - Operations – Transporting – 03 – D

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B03D 1/00 (2006.01) B03B 1/04 (2006.01) B03B 5/00 (2006.01) B03B 5/60 (2006.01) B03B 5/62 (2006.01) B03B 7/00 (2006.01) B03D 1/02 (2006.01) B03D 1/14 (2006.01) B03D 3/00 (2006.01)

Patent

CA 2074746

A particulate mass is separated into different classes according to the oleophilicity of the particles. This is achieved by pretreating the particles in a manner to selectively render one class of particles more hydrophobic than another class of particles and introducing the treated particles into a body of aqueous froth (37). The particles are recovered in fractions according to the rate at which the particles sink in the froth (37).

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