Process for refining kaolin

Details Process for refining kaolin Process for refining kaolin

C - Chemistry, Metallurgy

01

B

23/186

C01B 33/26 (2006.01) B03B 9/00 (2006.01) B03D 1/02 (2006.01) C04B 33/04 (2006.01) C09C 1/42 (2006.01)

Patent

CA 1292856

ABSTRACT OF THE DISCLOSURE A process is disclosed for producing high brightness kaolin from ore containing silica, other types of clays, minerals such as ilmenite micas, feldspars and various metal silicates as well as organic matter. The process consists of sizing, a double floatation step, magnetic separation, leaching and oxidative brightening steps. This is a novel combination of conventional unit operations and in particular the use of a double floatation step to remove quartz and various trace minerals that interfere with achieving high optical brightness for kaolin.

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