초록 ▼

Disclosed herein is a method of calcining particulate material, such as kaolin. The method comprises providing a feed mixture comprising a particulate material, such as hydrous kaolin, wherein at least a portion of the particulate feed is coated with a liquid fuel. The method further comprises heati

Disclosed herein is a method of calcining particulate material, such as kaolin. The method comprises providing a feed mixture comprising a particulate material, such as hydrous kaolin, wherein at least a portion of the particulate feed is coated with a liquid fuel. The method further comprises heating the particulate feed mixture to calcine the particulate feed and burn the liquid fuel to form a calcined product. The liquid fuel coating can act as a secondary, indirect heat source for calcining. The overall calcining temperatures and/or times can be reduced as a result of adding the liquid fuel.

대표청구항 ▼

What is claimed is: 1. A method for calcining, comprising:(a) providing a feed mixture comprising a particulate material comprising hydrous kaolin coated with a liquid fuel, wherein the liquid fuel is present in the feed mixture in an amount ranging from about 0.01% to about 4% by weight, relative t

What is claimed is: 1. A method for calcining, comprising:(a) providing a feed mixture comprising a particulate material comprising hydrous kaolin coated with a liquid fuel, wherein the liquid fuel is present in the feed mixture in an amount ranging from about 0.01% to about 4% by weight, relative to the total weight of the feed mixture; and(b) heating the feed mixture to at least partially dehydroxylate the hydrous kaolin and burn the liquid fuel to form a calcined product having a first GE brightness equal to or greater than a second GE brightness for a second calcined product produced by calcining at a higher temperature a second hydrous kaolin devoid of the liquid fuel.