METHOD AND APPARATUS FOR FROTH WASHING IN FLOTATION

摘要

A method and apparatus for introducing wash water into a flotation froth in a flotation separation system, where the wash water is injectioned into the froth (25) in the form of a horizontal sheet of water (27). The sheet (27) i s typically formed by impinging a downwardly directed liquid jet (23) issuing from a nozzle (22) onto a horizontal plate or disc (24) where it changes direction and travels radially outwards as an axi-symmetric planar liquid je t or sheet (27). The depth of the disc (24) can be adjusted by a support rod (28). Other embodiments are described where the horizontal sheet is ejected through a horizontal slit, or where the sheet of wash water is rectangular rather than axi- symmetric.