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    7up's Avatar
    7up Posts: 180, Reputation: 1
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    #1

    Mar 3, 2011, 04:40 AM
    I built a small gas furnace to melt copper,but I close the lid the flame goes out.
    The furnace is built with fire bricks so copper can be melted down and cast,but when the lid is closed the flame goes out.
    tickle's Avatar
    tickle Posts: 23,801, Reputation: 2674
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    #2

    Mar 3, 2011, 05:15 AM

    You need an in draft to keep the fire going. When you close the lid, you cut off the oxygen supply that keeps the fire going. In other words you need 'dampers'.
    Tick
    tickle's Avatar
    tickle Posts: 23,801, Reputation: 2674
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    #3

    Mar 3, 2011, 10:04 AM

    7, you don't need a blower, just a good up draft, or side draft. It has to be the kind of draft you can control, like a damper in a fireplace insert. Go take a look at one in a store where they sell them.

    Tick

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