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:
Feb. 28, 1989
Filed:
Sep. 28, 1987
Peter Tiggesbaumker, Oelde, DE;
Manfred Durr, Oelde, DE;
Jurgen Wurr, Ennigerloh, DE;
Karl Krutzner, Beckum, DE;
Wolfgang Rother, Oelde, DE;
Karl Menzel, Ennigerloh, DE;
Frank Schaberg, Oelde, DE;
Heinrich Klockenbusch, Ahlen, DE;
Georg Unland, Ennigerloh, DE;
Gunter Driemeier, Lienen, DE;
Krupp Polysius AG, , DE;
Abstract
The heat treatment of fine-grained material wherein two quantities of fuel are delivered to a precalcination zone at two different levels. The first quantity of fuel is delivered at a lower level nearer the combustion zone and the oxygen content of the gases passing through this region of the precalcination zone are such that in this region a substoichiometric combustion takes place and a CO content between 0.05% and 1% is established. As a result a reducing decomposition of the NO.sub.x content of the exhaust gases from the combustion zone takes place.