Measuring system, for measuring slag thickness on molten steel in a ladle, comprises a computer for determining the atmosphere-slag and slag-steel interfaces from immersion lance load variation

摘要

A slag thickness measuring system, comprising a computer for determining atmosphere/slag and slag/steel interfaces from immersion lance load variation, is new. A slag thickness measuring system comprises (a) a motor for immersion lance lowering into and raising from a ladle containing slag and molten steel; (b) an encoder for delivering a pulsed signal corresponding to the drive speed and rotating direction of the motor; (c) a counter for counting the signal pulses delivered in real time from the coder and for determining complete withdrawal of the lance (3); (d) a force measuring gauge for measuring load variations acting on the lance; (e) a transducer for converting the detected load variations into an electrical signal; and (f) a computer for calculating the slag thickness by creating a graph of load variation versus the completed lance path and for determining the atmosphere/slag interface and the slag/steel interface from the graph. An Independent claim is also included for a slag thickness measuring process employing the above system.