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:
Jul. 23, 2019
Filed:
Oct. 20, 2017
Applicant:
Her Majesty the Queen IN Right of Canada, As Represented BY the Minister of Natural Resources, Ottawa, CA;
Inventors:
Samira Sokhanvaran, Ottawa, CA;
Dogan Paktunc, Ottawa, CA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 5/10 (2006.01); C21B 13/00 (2006.01); C22B 34/32 (2006.01);
U.S. Cl.
CPC ...
C22B 34/32 (2013.01); C21B 13/008 (2013.01); C22B 5/10 (2013.01);
Abstract
A method of chromite reduction using cryolite (NaAlF) as an additive. The cryolite used may be pure cryolite or an impure mixture containing cryolite, such as the bath material produced as waste or as a by-product of aluminum smelting processes. In one embodiment, the reduction product is re-melted at a higher temperature to form larger metallic particles. In another embodiment, the chromite ore is granulated with cryolite particles and carbon reductant particles before being reduced.