| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect early during continuous casting the abnormality of a two-fluid spray nozzle in a secondary cooling zone of a continuous casting machine. <P>SOLUTION: The method for detecting the abnormality of the two-fluid spray nozzle that composes the secondary cooling zone of the continuous casting machine includes (a1) measuring pressure and flow on the secondary side of a flow regulating valve for regulating the flow of cooling water fed to the two-fluid spray nozzle, and comparing them with a predetermined pressure-flow reference line to obtain a pressure difference, (a2) measuring pressure and flow on the secondary side of a flow regulating valve for regulating the flow of air fed to the two-fluid spray nozzle, and comparing them with a predetermined pressure-flow reference line to obtain a pressure difference, and (b) detecting the abnormality of the two-fluid spray nozzle from a combination of the pressure difference of cooling water and the pressure difference of air. The secondary side of the flow regulating valve means the downstream side of the flow regulating valve. <P>COPYRIGHT: (C)2013,JPO&INPIT |
