Document Type and Number:
Japanese Patent JPS6253584
Kind Code:
B2
Abstract:
A casting furnace is fed an inert gas under pressure through a feed line with the pressure being regulated by a melt level control device. When the pressure is reduced, the inert gas is exhausted from the casting furnace by an exhaust line, the feed line having a check valve to prevent gas which is contaminated by magnesium from entering the feed line. An oxidizing gas, preferably pressurized air, is periodically fed into the exhaust line by an oxidizing gas line for cleaning the drain line and the pressure-controlling aperture therein by oxidizing the magnesium.
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Inventors:
DERUSHU SUTEFUAN
RIISUMAN MATSUKUSU
RIITSUSHAA RORUFU
RIISUMAN MATSUKUSU
RIITSUSHAA RORUFU
Application Number:
JP3101386A
Publication Date:
November 11, 1987
Filing Date:
February 17, 1986
Export Citation:
Assignee:
GEORUKU FUITSUSHAA BURUTSUKU EERAA AG
International Classes:
C22C33/10; B22D1/00; B22D3/00; B22D18/00; B22D18/04; B22D23/00; B22D27/13; B22D39/06; B22D41/50; C21C1/08; C21C1/10; F27D25/00