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:
Jul. 17, 1990
Filed:
Jan. 03, 1989
Applicant:
Inventors:
Manfred Durr, Oelde, DE;
Georg Unland, Ennigerloh, DE;
Wolfgang Rother, Oelde, DE;
Gunter Driemeier, Lienen, DE;
Heinz-Herbert Schmits, Rheda-Wiedenbruck, DE;
Assignee:
Krupp Polysius AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27B / ; F27B / ;
U.S. Cl.
CPC ...
432106 ; 432 14 ; 432 58 ;
Abstract
The invention relates to a method and to apparatus for the heat treatment of fine-grained material using a calcination zone which is arranged between a preheating zone and a final combustion zone, and after passing through the calcination zone a proportion of the material is introduced into exhaust air from the cooling zone and delivered therewith back to the calcination zone for the purpose of recirculation. In this way a good burn-out of the fuel used in the calcination zone and a high degree of deacidification of the material are achieved.