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. 02, 2015
Filed:
Jul. 03, 2014
Rebei Bel Fdhila, Vasteras, SE;
Jan-erik Eriksson, Vasteras, SD;
Olof Hjortstam, Vasteras, SE;
Mohamed Ali Rahmani, Vasteras, SE;
Shiva Sander-tavallaey, Taby, SE;
Ola Widlund, Hagersten, SE;
Hongliang Yang, Vasteras, SE;
Xiaojing Zhang, Vasteras, SE;
Rebei Bel Fdhila, Vasteras, SE;
Jan-Erik Eriksson, Vasteras, SD;
Olof Hjortstam, Vasteras, SE;
Mohamed Ali Rahmani, Vasteras, SE;
Shiva Sander-Tavallaey, Taby, SE;
Ola Widlund, Hagersten, SE;
Hongliang Yang, Vasteras, SE;
Xiaojing Zhang, Vasteras, SE;
ABB RESEARCH LTD., , CH;
Abstract
A method for melting steel in an electric arc furnace (EAF). A hot heel is provided in the EAF. Metal scrap is loaded into the EAF. The metal scrap is melted in the EAF. The mass of the hot heel in relation to the mass of the metal scrap that is initially beyond the surface of the hot heel is a certain minimum. This minimum is 0.75 times the relation between the heat required to melt the metal scrap beyond the surface of the hot heel and the heat that can be taken from the hot heel without it being solidified when a theoretical heat balance calculation is applied as defined in a formula.