On-line Monitoring of the Ladle Stirring

摘要

Gas stirring is commonly applied in secondary steel making and the objectives of stirring is to enhance heat and mass transfer inside the ladle to achieve homogenization of temperature and composition, facilitate slag-metal interactions, and accelerate the removal of inclusions in the steel'11, however, it is difficult to monitor the stirring effect using just the gas line pressure and the volume flow rate due to leakages between the connectors and hook-ups'21. An intermittent view of the top disturbed surface has to be applied to monitor the stirring conditions during the actual operations, in which, the subjective judgement of the operator is required to control the stirring process. Acoustic technology and vibration analysis to monitor and control steelmaking process have found increasing application in recent years.