COOLED LANCE FOR INJECTING INTO A METALLURGICAL VESSELS

摘要

The present invention relates to a cooled lance for injecting into a metallurgical vessel, comprising an internal tube or duct (2), with a gas inlet (5) in the top and gas outlet openings (6) in the bottom of the injection lance (1), and at least one external tube or duct (3) that forms a cooling sheath with the internal tube or duct (2), the internal tube or duct (2) being attached at just one point of the external tube or duct (3) and the gas flows only through the cooling sheath formed between the internal tube or duct (2) and the external tube or duct (3).