File:Le plancher des tuyères.jpg

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English: Blast furnace

A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.

In a blast furnace, fuel, ore, and flux (limestone) are continuously supplied through the top of the furnace, while air (sometimes with oxygen enrichment) is blown into the bottom of the chamber, so that the chemical reactions take place throughout the furnace as the material moves downward. The end products are usually molten metal and slag phases tapped from the bottom, and flue gases exiting from the top of the furnace. The downward flow of the ore and flux in contact with an upflow of hot, carbon monoxide-rich combustion gases is a countercurrent exchange process.

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Source Flickr: Le plancher des tuyères
Author Stephane Gaudry
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This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 28 April 2013, 18:30 by Jonund. On that date, it was confirmed to be licensed under the terms of the license indicated.
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