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. 26, 2010
Filed:
Dec. 10, 2003
Dirk Nuber, Oberursel, DE;
Michael Ströder, Neu-Anspach, DE;
Werner Stockhausen, Bad Vilbel, DE;
Ali-naghi Beyzavi, Frankfurt am Main, DE;
Lothar Formanek, Frankfurt am Main, DE;
Martin Hirsch, Friedrichsdorf, DE;
Dirk Nuber, Oberursel, DE;
Michael Ströder, Neu-Anspach, DE;
Werner Stockhausen, Bad Vilbel, DE;
Ali-Naghi Beyzavi, Frankfurt am Main, DE;
Lothar Formanek, Frankfurt am Main, DE;
Martin Hirsch, Friedrichsdorf, DE;
Outotec Oyj, Espoo, FI;
Abstract
The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fine-grained solids are heated to a temperature of 700 to 950° C. in a fluidized bed reactor (). To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a gas supply tube () into a mixing chamber () of the reactor (), the gas supply tube () being at least partly surrounded by a stationary annular fluidized bed () which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed () are adjusted such that the particle Froude numbers in the gas supply tube () are between 1 and 100, in the annular fluidized bed () between 0.02 and 2 and in the mixing chamber () between 0.3 and 30.