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:
Aug. 17, 1976
Filed:
Sep. 10, 1975
Klaus Grebe, Kettwig, DT;
Hans DE Haas, Meerbusch, DT;
Norbert Dautzenberg, Wegberg-Beeck, DT;
Josef Hewing, Monchen-Gladbach, DT;
Mannesmann Aktiengesellschaft, Dusseldorf, DT;
Abstract
Iron oxide particles are made by spray calcination and the oxide is reduced at least substantially in CO at temperatures between 800.degree. and 1000.degree. C. The oxide is heat-treated prior to calcination or CaO is added to enhance formation of iron fibers. The reducing atmosphere may in parts include hydrogen or the last phase of reduction is carried out in hydrogen. The iron cake is cooled and broken up in a grinder. The resulting powder has low bulk density due to a fiber-like, non-porous consistency of its particles. Grinding may continue to increase bulk density.