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:
Jun. 10, 2014
Filed:
Jul. 13, 2011
Hiroshi Kobayashi, Niihama, JP;
Osamu Nakai, Tokyo, JP;
Keisuke Shibayama, Tokyo, JP;
Takayuki Nakai, Tokyo, JP;
Yoshitomo Ozaki, Tokyo, JP;
Norihisa Toki, Niihama, JP;
Junichi Takahashi, Niihama, JP;
Toshirou Tan, Niihama, JP;
Hiroshi Kobayashi, Niihama, JP;
Osamu Nakai, Tokyo, JP;
Keisuke Shibayama, Tokyo, JP;
Takayuki Nakai, Tokyo, JP;
Yoshitomo Ozaki, Tokyo, JP;
Norihisa Toki, Niihama, JP;
Junichi Takahashi, Niihama, JP;
Toshirou Tan, Niihama, JP;
Abstract
Provided is a method for producing ferronickel from a nickel sulfide or a mixed sulfide containing nickel and cobalt, obtained by hydrometallurgy of nickel oxide ore or obtained from scraps or products in process. The method for producing a ferronickel raw material is to form the ferronickel raw material from a nickel sulfide or a mixed sulfide containing nickel sulfide and cobalt sulfide, wherein treatments are performed through the following steps: (1) redissolution step, (2) deferrization step, (3) solvent extraction step, (4) hydroxylation step, (5) roasting step, and (6) washing and calcining step.