Direct current-light arc furnace
US5297159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Mar 16, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current arc furnace, includes a graphite cathode; and a container forming a hearth with a hearth base surface and having a container bottom acting as anode. The container bottom includes a supporting copper-plated sheet steel base consisting of a steel sheet and a copper plating plated on the steel sheet; electrical connection means extending through the steel sheet to contact the copper plating to supply an anode current to the copper plating; and a refractory brick lining having a graphite content above the copper-plated sheet steel base with the copper-plated layer adjacent the brick lining. In a preferred embodiment the graphite content in the brick lining decreases from the vicinity of the copper-plated sheet steel base to the vicinity of the hearth base surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.