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:
Jan. 03, 2012
Filed:
Nov. 07, 2007
Hidetoshi Tanaka, Kobe, JP;
Itsuo Miyahara, Kobe, JP;
Hiroshi Uemura, Kobe, JP;
Takao Harada, Kobe, JP;
Hiroshi Sugitatsu, Kobe, JP;
Isao Kobayashi, Kobe, JP;
Hidetoshi Tanaka, Kobe, JP;
Itsuo Miyahara, Kobe, JP;
Hiroshi Uemura, Kobe, JP;
Takao Harada, Kobe, JP;
Hiroshi Sugitatsu, Kobe, JP;
Isao Kobayashi, Kobe, JP;
Kobe Steel Ltd., Kobe-shi, JP;
Abstract
The present invention provides a method for efficiently manufacturing a titanium oxide-containing slag from a material including titanium oxide and iron oxide, wherein a reduction of titanium dioxide is suppressed and the electric power consumption is minimized. The method includes the steps of: heating a raw material mixture including titanium oxide, iron oxide, and a carbonaceous reductant, or the raw material mixture further including a calcium oxide source, in a reducing furnace; reducing the iron oxide in the mixture to form reduced iron; feeding the resultant mixture to a heating melting furnace; heating the resultant mixture in the heating melting furnace to melt the reduced iron and separate the reduced iron from a titanium oxide-containing slag; and discharging and recovering the titanium oxide-containing slag out of the furnace.