Patent · US Active

Method and arrangement for vortex reduction in a metal making process

US9360255B2 · kind B2 · utility

1Cited by

1References

11Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Jan-Erik Eriksson · Visby, SE
Tord Kroon · Visby, SE
Mohamed Ali Rahmani · Västerås, SE
Ola Widlund · Stuvsta-Snättringe, SE
Xiaojing Zhang · Austin, US
Christer Carlsson · Pewaukee, US
Hongliang Yang · Västerås, SE

Key dates

Filing date	Feb 27, 2014
Grant date	Jun 7, 2016
Priority date	—
Expiry date	Oct 30, 2034

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF27D27/00
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.