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Aluminum / Copper / Zinc / Lead / Magnesium: Holders / Launders

After melting, the aluminum is degassed and filtered. It is then generally tapped and gravity fed from the furnace into a holding furnace. From the holding furnace, aluminum is gravity fed again out to casting machines in insulated and heated troughs called launders. Many holding furnaces and almost all launder systems are electrically heated. However, one example of a gas-fired holding furnace is shown below.

This equipment features a flat flame roof mounted burner. Flat flame burners produce a flame pattern that eliminates flame impingement on the molten metal bath, minimizing metal losses. The equipment is designed to fit in a compact footprint space yet has the ability to recover greater metal temperature losses than an equivalent electrically heated design.