Title:
DIRECT SMELTING PROCESS
Document Type and Number:
WIPO Patent Application WO/1990/008843
Kind Code:
A1
Abstract:
This invention relates to a process for the direct smelting of ores, metallic compounds and the like with the use of a heat plasma. This process can be readily conducted with a simple installation irrespective of the shape of the object being smelted and without the necessity of using any plasma generating gas. The process of the invention is characterized by applying a multiphase AC voltage to a number of graphite electrodes to thereby cause arc discharge in the air and directly impinging a highly reductive non-transferred plasma arc generated by the oxidative decomposition of the graphite electrodes against the object from the tips of the electrodes.
Inventors:
SATO RYODA (JP)
SHOJI KICHINOSUKE (JP)
TAKEMURA NAOSHI (JP)
SHOJI KICHINOSUKE (JP)
TAKEMURA NAOSHI (JP)
Application Number:
PCT/JP1990/000076
Publication Date:
August 09, 1990
Filing Date:
January 23, 1990
Export Citation:
Assignee:
MANYO KOGYO KK (JP)
International Classes:
C22B5/10; C21B11/10; C21B13/12; C21C5/56; C22B4/00; C22B9/22; C22B21/00; C22B34/10; C22B34/32; C22B34/34; (IPC1-7): C21B11/00; C22B5/10; C22C33/04
Foreign References:
JPS58123809A | 1983-07-23 | |||
JPS5253713A | 1977-04-30 |
Other References:
See also references of EP 0417296A4
Attorney, Agent or Firm:
Yasuda, Toshio (Mikuriya Higashi-Osaka-shi, Osaka 577, JP)
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