Dear Mr. Vaid:

The beneficiation of kaolin which is won in a pit-moist state seldom ready for producing an intermediate or even final product is accomplished either by a wet or a dry processes (Carr and Herz, 1989). Some kaolin used for paper coatings for example is wet processed.Leaching is a common treatment used to remove the iron coloration, and delamination to reduce coarse stacks of kaolin to thin plates. As to its processing, kaolin poses some problems owing to the minute particle size that needs, in places, high-field strength magnetic separators to separate the ore from the gangue .  The capability of flotation as a common technique in mineral processing  to separate the raw material from its impurities diminishes along with the grain size getting smaller and smaller (Yoon and , 1986; Murray et al., 1993). Heavy minerals  can be separated by spiral contractors (Woollacott and Eric, 1994).

See also one of my projects and the most recent paper with flow sheets and figures:

DILL, H.G. (2016) Kaolin: soil, rock and ore From the mineral to the magmatic, sedimentary, and metamorphic environments.- Earth Sciences Reviews 161: 16-129.

I wish you much success

H.G.Dill

Suggest you contact Ravishankar at Solvay Cytec in Connecticutt. He did a lot of work in this area a few years back and has written papers about it. Mention my name. I know him well. If you need to contact me, do so through Linked in please.

Regards

You can use carrier flotation