Arc furnace for reducing metal oxides and method for operating such a furnace
US4149024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Mar 11, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D11/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An arc furnace has an arcing electrode through which a feeding passage is formed for feeding metal oxide particles through an arc and to a melt in the furnace. The arc is powered by DC power with the electrode cathodic and the melt anodic. Carbon is fed as required to reduce the oxides. Electric currents passing through the melt and the arc to the electrode are capable of causing magnetic forces forcing the arc to acquire an angular deflection in a downward direction away from alignment with the electrode's outer periphery and towards the side wall of the furnace in one direction subst antially continuously, during continuous operation of the furnace. Means are provided for electromagnetically causing the arc to continuously rotate, with its deflection, around the electrode. PAC BACKGROUND OF THE INVENTION
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.