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Title
Vintage diagram of a blast furnace. #211162722
Description
Harmworth`s Universal Encyclopedia 1940s. Blast Furnace - Diagram showing the essential features of a modern furnace capable of a weekly output of 2,000 tons of pig-iron. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being `forced` or supplied above atmospheric pressure.
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