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:
Oct. 13, 1987
Filed:
Jul. 31, 1985
Wilfried Pirklbauer, Neuhofen, AT;
Klaus Wieser, Linz, AT;
Abstract
There is disclosed a shaft furnace for the direct reduction of iron ores. It includes a gas feed device arranged centrally in the bottom of the shaft furnace in the longitudinal axis of the shaft furnace and having a central cavity. From the cavity, a plurality of gas outlets for the reduction gas, superposed in stages and passing through the gas feed device in its upper part, lead into the interior of the shaft furnace. In order to provide a shaft furnace with which operational failures caused by the gas feed device are prevented and with which the gas feed device is subject to little wear so that it need be exchanged in large time intervals only, the gas feed device is designed as a double-shelled hollow body. The shell interspace of the hollow body is connected to at least one supply duct and at least one discharge duct for a coolant.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile