Method for calcining kaolin

Details Method for calcining kaolin Method for calcining kaolin

1986-07-25

1987-07-07

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288B, 106308B, 106308C, 106308Q, C04B 1400

Patent

active

046785175

ABSTRACT:
A method for improving brightness in a calcined kaolin pigment while minimizing detrimental effects on abrasiveness. The kaolin calciner feed is intermixed with a particulate material which is oxidizable during calcining to provide a source of auxiliary thermal energy in the kaolin bed; and the mixture is calcined at a temperature in the range of about 900.degree. C., but below about 1100.degree. C., and in the presence of an oxidizing atmosphere throughout the calcining step.

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patent: 3519453 (1970-07-01), Morris et al.
patent: 3586523 (1971-06-01), Fanselow et al.
patent: 3798044 (1974-03-01), Whitley et al.
patent: 3941872 (1976-03-01), Puskar
patent: 3993500 (1976-11-01), Isaac et al.
patent: 4381948 (1983-05-01), McConnell et al.

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