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:
Feb. 16, 2010
Filed:
Dec. 13, 2003
Martin Hirsch, Friedrichsdorf, DE;
Werner Stockhausen, Bad Vilbel, DE;
Michael Ströder, Neu-Anspach, DE;
Martin Hirsch, Friedrichsdorf, DE;
Werner Stockhausen, Bad Vilbel, DE;
Michael Ströder, Neu-Anspach, DE;
Outotec Oyj, Espoo, FI;
Abstract
The present invention relates to a process for producing metal oxide from metal compounds, in particular metal hydroxide or metal carbonate, in which the metal compound is conveyed into a reactor () with fluidized bed, heated there to a temperature of 650 15 to 1150° C. by combustion of fuel, and metal oxide is generated, as well as to a corresponding plant. To improve the utilization of energy, 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, andto adjust the gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed () such that the Particle-Froude numbers in the gas supply tube () lie between 1 and 100, in the annular fluidized bed () between 0.02 and 2, and in the mixing chamber () between 0.3 and 30.