Hot blast is the preheated air blown into a blast furnace or used in other metallurgical process. This technology, which considerably reduces the fuel consumed, was one of the most important technologies developed during the Industrial Revolution.
Hot blast is the preheated air blown into a blast furnace or used in other metallurgical process. This technology, which considerably reduces the fuel consumed, was one of the most important technologies developed during the Industrial Revolution.
Source: Wikipedia "Hot blast" · CC BY-SA 4.0
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