tuyere

nozzle

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In blast furnace
…into the furnace through multiple tuyeres (nozzles) located around the circumference of the furnace near the top of the hearth; these nozzles may number from 12 to as many as 40 on large furnaces. The preheated air is, in turn, supplied from a bustle pipe, a large-diameter pipe encircling the…
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In iron processing: Structure
…blown into the furnace through tuyeres, water-cooled nozzles made of copper and mounted at the top of the hearth close to its junction with the bosh. A short vertical section called the bosh parallel, or the barrel, connects the bosh to the truncated upright cone that is the stack. Finally,…
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