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:
Jan. 09, 1979
Filed:
Feb. 02, 1978
Jan Visman, Edmonton, CA;
Canadian Patents & Development Limited, Ontario, CA;
Abstract
A method and apparatus for beneficiating crushed raw coal comprising: cleaning the crushed coal in bulk in cyclone separators using only water as a cleaning medium and obtaining a product of wet clean coal and wet reject material and also a stream of effluent; drying said wet clean coal and wet reject material by agglomerating after the addition of a small amount of oil and then centrifuging to obtain a product of clean dry coal and solid reject material and also a stream of effluent; treating the effluent stream from the cleaning step and the effluent stream from the drying step by means of flocculation to recover a product of coal and reject sludge which is returned to pass through the drying step again; and thus obtain clean water which is recycled and applied to the input of the cyclones in the cleaning step.