(under subclass 6) Subject matter comprising conduits for feeding air to furnaces and provided with a closed water-circulation.
SEE OR SEARCH CLASS
110, Furnaces,
182.5+, for tuyeres of general application and for other water circulation means therefor.
266, Metallurgical Apparatus,
265+, and especially 270 for tuyeres used in metallurgical apparatus which may include a liquid cooled tuyere element where the tuyere element is combined with additional structure, as for example, an external gas supply pipe, means for feeding diverse materials, flow control valves or a tuyere cooler, Further, see subclasses 186+ and 218+ for tuyeres combined with the treating vessel.
