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:
Aug. 17, 2010
Filed:
Aug. 10, 2004
Applicants:
Egbert Burchardt, Everswinkel, DE;
Franz-josef Zurhove, Bad Iburg, DE;
Inventors:
Egbert Burchardt, Everswinkel, DE;
Franz-Josef Zurhove, Bad Iburg, DE;
Assignee:
Polysius AG, , DE;
Primary Examiner:
Int. Cl.
CPC ...
B02C 7/00 (2006.01); B02C 23/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus for grinding iron ore or iron ore concentrate is able to grind iron ore or iron ore concentrate economically. In the method and apparatus disclosed, the material is ground in circulation in a material bed roll mill, one fraction of the iron ore or iron ore concentrate ground in the material bed roll mill is recirculated to the material bed roll mill and the other fraction of the iron ore or iron ore concentrate is classified into oversize material and fines, and the oversize material is returned to the material bed roll mill.