Patent · US Active

Method for melting steel

US9045810B2 · kind B2 · utility

2Cited by

5References

13Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Rebei Bel Fdhila · Hagfors, SE
Jan-Erik Eriksson · Visby, SE
Olof Hjortstam · Västerås, SE
Mohamed Ali Rahmani · Västerås, SE
Shiva Sander-Tavallaey · Hallsberg, SE
Ola Widlund · Stuvsta-Snättringe, SE
Hongliang Yang · Västerås, SE
Xiaojing Zhang · Austin, US

Key dates

Filing date	Jul 3, 2014
Grant date	Jun 2, 2015
Priority date	—
Expiry date	Jul 3, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/25
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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.

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