Patent · US Expired

Method for melting scrap in electric arc furnaces

US3999976A · kind A · utility

1Cited by

5References

4Claims

0Family size

Assignee

Demag Aktiengesellschaft

Inventors

Hans-Joachim Schubert · Wesseling, DE
Eckart Schunk · Düsseldorf, DE
Emil Elsner · Baden-Baden, DE

Key dates

Filing date	Apr 7, 1975
Grant date	Dec 28, 1976
Priority date	—
Expiry date	Apr 7, 1995

Classification

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

Abstract

A method is provided for lengthening the life of electric arc furnace linings in the production of steel from scrap, while at the same time introducing sponge iron pellets to shorten the melting time. This is achieved by predetermining the increase in power at the arc-molten bath interface upon introduction of the sponge iron and automatically reducing the power factor in the circuits feeding the electrodes according to the predetermination, upon each introduction of sponge iron.

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