Variable delivery pump for molten metal
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United States of America Patent
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Apr 23, 1996
Grant Date -
N/A
app pub date -
May 27, 1994
filing date -
May 27, 1994
priority date (Note) -
Expired
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Abstract
A pump for use in a bath of reactive molten metal such as zinc has a graphite rotor, driven at constant speed, and capable of pumping molten metal at selective rates from the bath. The pump includes an internal delivery flow path and protected drive shaft, so that the liquid metal of the bath is not turbulated by the rotating shaft, and the temperature of the metal within the pump, during semi-quiescent periods is maintained substantially constant. The pump has a robust structure and yet can handle rates as low as 10 to 15 pounds per minute, in contrast to usual types of pumps that require pumping about 80 pounds per minute, and being speed controlled, are less accurate in their delivery rates. An adjustable control for regulating flow rate during operation also is provided.
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