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An opening in the shell and refractory lining of a furnace through which air is forced.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a device for supplying an air blast in metallurgical furnaces or for blowing oxygen into metal baths in steelmaking and the smelting of nonferrous metals. In blast furnaces a tuyere is a nozzle with a water-cooled jacket, and in cupolas and water-cooled blast furnaces it is a slit-shaped opening in the wall of the unit. In converters, open-hearth furnaces, and two-bath steel-making furnaces such a device is called a lance; it is a pipe for supplying oxygen that has a tip of special construction and a water-cooled jacket. A mechanism is provided for raising, lowering, and replacing the tuyere. Besides oxygen, powdered materials can be supplied through tuyeres and lances (for example, in the basic oxygen process).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The fragments of vitrified ceramics, tuyere, quartz, haematite and dense slag with flow marks found during the excavation suggest that these structures were furnaces used for iron smelting.
When the oxygen-enriched air is injected from tuyere into the bath at a low velocity, the air is actually sprayed into the molten pool at a pulse type, belonging to the bubble generation system, namely, the bubble bath smelting.
Our smelting experiments necessitated the continuous labor of three to four individuals providing continuous draft into a small furnace through narrow blowtubes with ceramic tuyeres for roughly three hours to produce slag lumps weighing ca.
Shlyapnikov, "Method of Calculating and Designing Systems for Distributing Coal-Dust Fuel among a Blast Furnace's Tuyeres," Steel in Translation 27(1), 11-20 (1997).
The report theorized that the injection of the upgraded ASR would be done through the tuyeres of the blast furnace directly into the combustion zone, thereby reducing the total amount of fuel material required.
In the lead circuit, US$3.8 million will provide a new bank of cells to give the extra 10,000 t of output, half of which will be seen this year, also automatic controllers are to be installed on the tuyeres in the lead blast furnace and there is to be some equipment replacement.
Tuyeres - three concentric pipes that carry wastes in the center, oxygen in the intermediate pipe, and methane in the outer pipe - are also incorporated in the design.
Evidence for this early mining activity comes in the form of copper slag deposits (Halbich, 1968), stone constructions and several tuyeres (blast furnace nozzles) found in the vicinity.