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:
Oct. 21, 1980
Filed:
Dec. 29, 1978
Andris Abelitis, Rosrath, DE;
Klockner-Humboldt-Wedag AG, , DE;
Abstract
A method and apparatus for the production of cement clinker low in sulphur from a calcium carbonate containing particulate raw material in an installation containing a multi-stage suspension gas preheater, a sintering furnace and a material cooler. A portion of the sulphur-containing exhaust gases issuing from the sintering furnace is separated, and the separated portion is preheated in the gas preheater. The material is heated in the hottest stage of the preheater to a temperature below the deacidification temperature. A reducing medium is added to the thus heated material. The remaining portion of the sulphur-containing exhaust gases is removed from the system for disposition.