| 摘要 |
The invention relates to producing and processing liquid metal in metallurgy. The tuyere device for introducing gaseous media under a liquid-metal layer comprises a refractory nest block provided with a sleeve incorporated therein, coaxial metal tubes provided with at least one central operating channel and at least one annular operating channel which are arranged on the side thereof for entering a liquid metal and separately connected to inlets for supplying gaseous media to the metal. According to said invention, said coaxial metal tubes consist of two interconnected sections having different diameters, the first section has a smaller diameter and is used for supplying the gaseous media to the liquid metal, and the second section has a larger diameter and is connected to said inlets for separately supplying the gaseous media to the operating channels of the first section, at the same time the second section is provided with an additional metal tube and with the annular operating channels only, the internal tube of said section is closed on both ends thereof and filled with a refractory material, the spaces of said annular operating channels of the tuyere are embodied in the form of capillaries for the liquid metal. Said invention makes it possible to exclude a metal break through the operating channels.
|
