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Apparatus for melting metal

Image Number 3 for United States Patent #4562996.

This invention relates to apparatus for melting metal, and particularly for melting lead. The apparatus 10 comprises a reservoir 11, a heat exchange tube 12, which extends through the reservoir, a burner nozzle 13 at the inlet 14 of the tube and a flue 15 at the outlet 16 of the tube 12. Heating of air in the tube induces a draught through the tube and up the flue 15, so that air is drawn into the tube at the inlet 14. This flow of air causes the flame from the burner nozzle 13 to be sucked downwardly into the tube. The tube, and hence lead surrounding it, is thus heated.

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