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:
Sep. 24, 2002
Filed:
Apr. 13, 2001
Metallgesellschaft AG, Frankfurt am Main, DE;
Abstract
A fine-grained product with a grain size of 100%<5 mm is obtained during the production of titanium dioxide in the chloride method in which titanium-containing raw material is reacted with gaseous chlorine in the presence of a carbon-rich substance, preferably coal and/or coke, in a chlorination reactor, preferably with a fluidized bed, to form titanium tetrachloride, the fine-grained product consisting, in the dried state, of the main constituents TiO , coal and SiO , mixed with filter salt (iron sulfate that is obtained during dilute acid recovery), residues containing TiO from TiO -production according to the sulfate method, coal, sulfur, and ilmenite/TiO -slag. This mixture is treated in a fluidized bed furnace or rotating tubular furnace at temperatures of 900 to 1,300° C. The mixture is used as a flux for the purpose of improving the durability of the brick lining of a furnace for the smelting-metallurgical production of metallic materials.