<p>An arc is drawn between a movable electrode (E) (preferably graphite), and a fixed electrode (7) in a furnace when smelting metal oxides using a plasma. Shielding gas, e.g. N. is introduced into plenum (P) about the movable electrode (E) to prevent metal vapor from settling on the inner lining (3;9) of the furnace (1). The movable electrode (E) may be connected to a mast (30) on the furnace roof (4) to align that electrode (E) in its path through a hole (10) in the roof (4) into the furnace chamber (C).</p>
申请公布号
DE69114296(D1)
申请公布日期
1995.12.07
申请号
DE1991614296
申请日期
1991.08.19
申请人
TETRONICS RESEARCH AND DEVELOPMENT CO. LTD., FARINGDON, OXFORDSHIRE, GB;INTERNATIONAL MILL SERVICE INC., HORSHAM, PA., US;MULTISERV INTERNATIONAL LTD., LONDON, GB