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:
Mar. 24, 2020
Filed:
Jun. 23, 2014
Applicant:
Kobe Steel, Ltd., Kobe-shi, JP;
Inventors:
Assignee:
KOBE STEEL, LTD., Kobe-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B03D 1/02 (2006.01); B03D 1/012 (2006.01); B03D 1/01 (2006.01);
U.S. Cl.
CPC ...
B03D 1/012 (2013.01); B03D 1/01 (2013.01); B03D 1/02 (2013.01); B03D 2201/02 (2013.01); B03D 2203/02 (2013.01);
Abstract
A process for producing an iron ore having a sulfur content reduced to 0.08% or less, which includes a step of subjecting an iron ore containing sulfur in an amount of more than 0.08% and 2% or less to a flotation. The flotation satisfies any one of the following (1) to (3): (1) a xanthate-based compound and a salt of an amine compound are used as collectors, (2) a xanthate-based compound is used as a collector and a substance which releases a sulfur ion in water is used as an activator, or (3) a xanthate-based compound and a salt of an amine compound are used as collectors and a substance which releases a sulfur ion in water is used as an activator.