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. 25, 2009
Filed:
Jan. 11, 2008
Richard Michael Viljoen, Sunninghill, ZA;
Jan Tjeerd Smit, Roosevelt Part Ext., ZA;
Udo Meyer, Krugersdorp, ZA;
Carlos Felipe Lozano-vallejos, Ontario, CA;
Richard Michael Viljoen, Sunninghill, ZA;
Jan Tjeerd Smit, Roosevelt Part Ext., ZA;
Udo Meyer, Krugersdorp, ZA;
Carlos Felipe Lozano-Vallejos, Ontario, CA;
Loesche GmbH, Duesseldorf, DE;
Anglo American Research Laboratories (PTY) Ltd, Johannesburg, ZA;
Abstract
A method and apparatus for comminuting particulate material by interparticle comminution in a bed of particles are disclosed. The apparatus includes a vertical roller mill with a horizontal grinding table rotating about a vertical mill axis. At least one grinding roller presses resiliently against a bed of particulate material on the grinding track and applies a compressive force. The geometry of the mill is such that the roller engages the bed of particulate material with a substantially pure rolling action. This minimizes shear forces applied to the particle bed and minimizes the reduction of fines.