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. 24, 1981
Filed:
Dec. 06, 1978
Applicant:
Inventors:
Hans Bender, Leverkusen, DE;
Werner Hasse, Bochum, DE;
Roland Pfeiffer, Cologne, DE;
Karl-Heinz Unkelbach, Cologne, DE;
Assignee:
Klockner-Humboldt-Deutz AG, , DE;
Primary Examiner:
Int. Cl.
CPC ...
B03B / ;
U.S. Cl.
CPC ...
209-3 ; 209-8 ; 209 40 ; 209214 ; 44 / ; 241 24 ;
Abstract
A method for reducing the sulfur content of coal which involves an integrated, continuous process including the steps of grinding the coal in a dry state, activating the ground coal to increase substantially the magnetic susceptibility of the pyrite contained therein, and separating the thus activated pyrite magnetically from the remainder of the coal.