Patent · US Expired

Plasma burner for transferred electric arc

US5206481A · kind A · utility

16Cited by

11References

19Claims

0Family size

Assignee

Fried Krupp · DE

Inventors

Heinrich-Otto Rossner · Essen, DE
Ulrich Scheffler · Essen, DE
Gebhard Tomalla · Essen, DE
Herbert Klein · Kiel, DE

Key dates

Filing date	Jul 2, 1991
Grant date	Apr 27, 1993
Priority date	—
Expiry date	Jul 2, 2011

Classification

Technology area (CPC H)Electricity
CPC primaryH05H1/28
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A plasma burner has an annular passage extending along an insulated tube defining the outer wall of the electrode lance and located between the electrode lance and the multi wall burner shell to deliver the auxiliary gas outwardly of the plasma gas. The nozzle forming end of the electrode lance has a coolant circulation as has the burner shell and the annular passage extends substantially to the coolant inlets and outlets of the burner. The construction avoids the formation of parasitic arcs.

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