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:
Jun. 07, 2016
Filed:
Feb. 27, 2014
Abb Research Ltd., Zurich, CH;
Jan-Erik Eriksson, Vasteras, SE;
Tord Kroon, Vasteras, SE;
Mohamed Ali Rahmani, Vasteras, SE;
Ola Widlund, Hagersten, SE;
Xiaojing Zhang, Vasteras, SE;
Christer Carlsson, Pewaukee, WI (US);
Hongliang Yang, Västerås, SE;
ABB Research Ltd., Zurich, CH;
Abstract
A method for reducing vortex formation in molten metal when bottom tapping the molten metal from a metallurgical vessel in a metal making process. The method includes the steps of tapping the molten metal via a tapping hole in the metallurgical vessel, and providing a flow of the molten metal in the metallurgical vessel while tapping via a time-varying electromagnetic field applied to the metallurgical vessel, the flow of the molten metal being such that it constantly moves vortices in the molten metal away from a tapping hole region during the tapping to thereby prevent accumulation of the vortices for vortex formation over the tapping hole. It is also presented an arrangement for carrying out the method.