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:
Sep. 12, 1995
Filed:
Nov. 12, 1993
Hassan E El-Shall, Valrico, FL (US);
Florida Institute of Phosphate Research, Bartow, FL (US);
Abstract
A method of dewatering mineral-containing sludge by adding to the sludge (a) an aqueous solution or emulsion of acrylamide polymer flocculating agent and (b) a microfiber additive. By using this method, such mineral-containing sludges can be quickly dewatered into a cake having 25-35% solids which can then be further processed to a 60% solids-containing material. The method is particularly suitable for use in methods for treating, recovering, rehabilitating and recycling residue of mining operations. The method also enhances the filtration characteristics of certain mineral residues. With modification, the method is also suitable for dewatering organic sludges. Kaolin clay and red mud from the Bayer process are disclosed among the mineral-containing sludges which may be dewatered in accordance with the process of the invention.