Plasma arc furnaces
US4521890A · kind A · utility
16Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1983 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | May 25, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2099/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to the construction and use of plasma arc furnaces; more particularly it relates to a transferred arc mode of operation in such furnaces. In more detail a plasma arc furnace according to this invention comprises at least two stationary plasma torches positioned at or near the upper end of a furnace chamber and directed downwardly at an inclined angle towards an electrically conducting vessel for containing melt produced in the furnace and at least one electrical return anode connection made to said vessel at a point above the point of coalescence of the arcs produced, in use, by the torches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.