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, 1978
Filed:
Sep. 19, 1977
Gregory D Loughrie, Tampa, FL (US);
CF Industries, Inc., Long Grove, IL (US);
Abstract
This application discloses a method of wet grinding crude phosphate rock containing clay minerals and the like impurities. The procedures of the invention produce a rock slurry of enhanced fluidity and a desired degree of economy; and the principles of the invention may be applied to rock slurries after size-reduction. The method of the invention contemplates introducing coarsely sized, crude phosphate rock with component clay minerals or the like into a grinding mill together with a suitable quantity of water and with an amount of a calcium-free alkaline amendment or additive material which is adequate to establish and maintain a pH of at least about 8.5 in the mixture.