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:
Apr. 05, 1988
Filed:
Dec. 08, 1986
Charles E Eckert, Plum Boro, PA (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A system is disclosed for efficiently mixing streams of molten metal to form a molten metal alloy while inhibiting oxidation and introduction of impurities such as hydrogen gas into the molten metal which comprises passing a first molten metal stream at a minimum velocity of at least 18 cm/sec into a mixing zone and feeding a second molten metal stream at a lower velocity into the mixing zone through a concentric feed tube around which the first molten metal stream is flowing. The first molten metal stream is maintained in turbulent flow conditions with a Reynolds number of greater than 2100. In a preferred embodiment, the minimum velocity of the first stream is raised before reaching the mixing zone by introducing a non-oxidizing gas into the stream.