Tsugio Matsuura*, Keiji Taniguchi* and Kohichi Makida*

* Fukui University Graduate school of Engineering

+ Correspondence should be addressed to Tsugio Matsuura:
(3-9-1 Bunkyo, Fukui 910 Japan)

Abstract

In this paper, techniques for processing industrial waste by arc plasma which generates among six carbon electrodes using a six-phase current power supply and its applications are described. The power supply of this system can be realized by the combination of three single-phase transformers with the center-taped secondary coil. The characteristics of arc plasma generated around the discharge electrodes and a few examples applying an arc plasma to industries are presented here. The major advantages of this system are as follows:

1. As arc plasma always exists in the discharged space, the stable discharge phenomena can be maintained in low voltage,

2. Arc plasma at high temperature can be obtained in a wide space.

By the use of this system, incinerated urban garbage can be slagged, and a lot of spherical ceramics of about 200 microns in diameter are obtained from ash generated by the operation of power plants.

Key words: six-phase alternating current, arc-discharging phenomena, plasma, smelting of industrial waste