Process for preventing the formation of deposits in a discharge

Details Process for preventing the formation of deposits in a discharge Process for preventing the formation of deposits in a discharge

1986-02-21

1990-03-20

Seidel, Richard K.

Dispensing

Processes of dispensing

Molten metal

164 661, 164475, 164488, 222603, B22D 1100, B22D 3700

Patent

active

049094220

ABSTRACT:
Molten metal is teemed through a discharge nozzle controlled by a shut-off device during which inert gas is injected into an inlet portion of the discharge nozzle. A reduction of the cross section of the discharge nozzle due to the formation therein of deposits is prevented by injecting at least a portion of the inert gas into the inlet portion in a pulse-like manner by controlling the supply of the inert gas with respect to time and volume. The inert gas may be supplied from a source as partial volumes through plural branch lines each provided with shut-off and control valves, and the operation of such valves may be programmed to control the duration and repetition period of the supply of each partial volume.

REFERENCES:
patent: 3253307 (1966-05-01), Griffiths et al.
patent: 3502134 (1970-03-01), Orehoski
patent: 4003561 (1977-01-01), Cudby
patent: 4203538 (1980-05-01), Luhrsen

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