Melting furnace
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United States of America Patent
Stats
-
Sep 21, 2021
Grant Date -
Feb 25, 2021
app pub date -
May 20, 2020
filing date -
May 23, 2019
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A melting furnace includes a melting portion to which a metal material is supplied; a burner for melting the metal material in the melting portion; a heating portion that receives the molten material from the melting portion; a temperature regulating portion that receives the molten material from the heating portion; a separator that separates the heating portion and the temperature regulating portion, wherein the lower portion of the separator is immersed in the molten material to form, below the separator, an inlet; an immersion heater wherein at least part of the immersion heater is immersed in the molten material in the temperature regulating portion; and a gas introduction path that is formed in the separator, and that introduces combustion gas from the burner into a space above the molten material in the temperature regulating portion; wherein the burner is controlled so that the combustion gas has an oxygen concentration of 5% or less.
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