McDougall furnace

Mc·​Dou·​gall furnace | \ mə̇kˈdügəl-\

Definition of McDougall furnace

: a roasting furnace consisting of a vertical cylindrical shaft containing several superposed hearths over which ore entering at the top is made to pass consecutively by mechanical rabbles rotating around a central shaft

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History and Etymology for McDougall furnace

after McDougall, 19th century British engineer

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a bell tower

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