| 摘要 |
EXTENDABLE LANCE Disclosed is apparatus for melting and refining metal, including a combustion block having a watercooled combustion chamber which opens at one end of the combustion block for combustion of fuel and oxygen and a nozzle located at the open end of the combustion chamber through which a flame is directed. Means is provided for delivering fuel to the combustion chamber. A movable, watercooled lance pipe having a conduit located within and running the length of the lance pipe for delivering oxygen through the lance pipe is located through the combustion block such that the lance pipe may be retracted to provide a means of supplying oxygen to the combustion chamber of the combustion chamber block to combust the fuel and may be extended through the combustion chamber and nozzle of the combustion block to provide a means of supplying oxygen to refine metal. Means is provided for extending the lance pipe through and beyond the combustion chamber and for retracting the end of the lance pipe. |
