The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2002
Filed:
Mar. 28, 2000
Christopher Edward Dodson, Oakville, CA;
Grant Ashley Wellwood, Reading, GB;
Mortimer Technology Holdings Limited, Berkshire, GB;
Abstract
The present invention provides a process for treating a particulate material, in which particles of the material to be treated interact with non-static particles of a second material, the process comprising the steps of: (i) providing a processing chamber ( ) having an inlet ( ) and an outlet ( ) spaced downstream therefrom, the base ( ) of said chamber comprising a plurality of outwardly radiating inclined vanes ( ), (ii) providing a host bed of particles ( ) which include inert particles, alumina, limestone and activated carbon in the chamber ( ) and generating a flow of fluid through the vanes ( ) at the base ( ) of the processing chamber such that the bed of host particles ( ) circulates about an axis of the chamber in a compact band, (iii) injecting particles of the material to be treated including sulphide ore, kaolin, gypsum and talc through an inlet ( ) of the chamber ( ) to contact with the circulating bed of the host particles ( ), wherein the relative terminal velocity of the particles to be treated ( ) and the host particles ( ) is such that there is little or substantially no migration of the host particles to the outlet ( ), and wherein substantially all of the particles of the material to be treated migrate downstream through the circulating host particles to the outlet ( ). The process may be used to treat sulphide ores, for flash devolitization, calcination and gasification.