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:
Dec. 30, 1980
Filed:
Aug. 30, 1979
Wolfgang Rohde, Essen, DE;
Bergwerksverband GmbH, Essen, DE;
Didier Engineering GmbH, Essen, DE;
Abstract
A process and an apparatus for the drying and preheating of coking coal is described, in which a coarser grain fraction of the starting coal is separated out at least at one location in a flight stream tube through which the coal and a heat carrier gas are fed, and in which this larger grain fraction is subsequently reintroduced into the main stream containing only the finer grain fraction of the coal and the predominant portion of the heat carrier gas. The method and the apparatus through which the method may be carried out allow for a single-step process for both drying and preheating of the coal, make it possible to substantially reduce the length of the flight stream tube necessary, and increase the uniformity of the degree of pretreatment of the variously-sized fractions of the starting material.