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. 18, 1992
Filed:
Mar. 19, 1991
Heinz Buhr, Meerbusch, DE;
Didier-Werke AG, Wiesbaden, DE;
Abstract
An interchangeable wearable refractory part for a discharge opening of a metallurgical vessel is provided with at least one ceramic filter for filtering a molten metal stream. The refractory part, such as a sliding valve plate, casting pipe, discharge sleeve or nozzle, or stationary base plate, may have the ceramic filter mounted in a passage opening thereof. The refractory parts are wearable, and thus are from time to time, replaced. The service life of the ceramic filters are chosen to correspond with the life span of the refractory part. The ceramic filter can either be a single filter in the passage opening, or a multi-stage filter including a coarse filter for larger impurities, a fine filter for smaller impurities as well as an absorption or reaction filter for dissolved impurities.