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:
Apr. 21, 2020
Filed:
Feb. 08, 2016
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Hirotaka Higuchi, Tokyo, JP;
Masaki Imamura, Tokyo, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
There is provided a method capable of effectively reducing the amount of acid used in a leaching step and the amount of a neutralizer used in a final neutralization step while nickel yield in a hydrometallurgical process for nickel oxide ore is not reduced. A method for pre-treating ore slurry according to the present invention is a method for pre-treating ore slurry to be provided to a leaching treatment in a hydrometallurgical process for nickel oxide ore, the method including: a first separation step for separating ore slurry into a coarse particle fraction and a fine particle fraction; a second separation step for separating the coarse particle fraction separated in the first separation step into a heavy specific gravity fraction and a light specific gravity fraction; and a vibration sieving step for separating, by a vibration sieve, the light specific gravity fraction.