DC arc furnace and starting electrode construction
US4024337A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Dec 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC arc furnace has a hearth through which electric power is transmitted to a melt, and at least one starting electrode which can be inserted into the furnace from its outside, for pressing against a pile of scrap on the furnace's hearth so that with the furnace's arcing electrode, a circuit can be formed effecting a melt-down of the scrap. The hearth is of the type permitting electric power to be transmitted through it to the resulting melt once the melt is formed, and the starting electrode being thereafter inactivated. This starting electrode is characterized by being made of metal and having a tip of carbonaceous material, such as graphite, providing the starting electrode with the rugged characteristics required for its insertion into and removal from the furnace for start-up of the furnace, while at the same time providing a tip that is particularly resistant to the heat and possible incidental arcing occurring during the use of the starting electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.