Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1993-12-23
1995-10-03
Bell, M. L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106484, 106488, 2521861, 501145, 501146, 501148, 209 39, C04B 1410
Patent
active
054548659
ABSTRACT:
A method which enables economical and highly effective preparation of refined kaolin clay products having preselected particle size distributions and brightnesses, by means of separate, efficient and economical processing of at least two crude components. A fine particle size kaolin crude having a PSD such that at least 85% by weight of the particles are of less than 2 micrometers ESD is wet beneficiated to provide a first product component having a PSD of at least 95% by weight less than 2 micrometers and a brightness of at least 89 on the G.E. scale. This wet beneficiation is conducted without use of a froth flotation step. A coarse particle size kaolin crude having a PSD such that less than 85% by weight of particles are of less than 2 micrometers ESD, is separately wet beneficiated to produce a second product component having a PSD of no more than 85% by weight less than 2 micrometers and a brightness of at least 89 on the G.E. scale. This last wet beneficiation is, however, conducted with use of a conventional froth flotation step. The first and second product components are then blended in proportions to produce the desired refined kaolin clay product having a preselected PSD and brightness. The first and second components can also be used as is.
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Cobb Gary
Ginn Michael W.
Bell M. L.
ECC International Inc.
Marcheschi Michael
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