METHOD FOR PREDICTING BREAKOUT IN CONTINUOUS CASTING

摘要

PURPOSE:To decrease erroneous judgement of breakout and to judge exactly the breakout with a method for predicting the breakout from the value detected by plural temp. detecting ends embedded into the side wall of a casting mold by judging abnormality when the detected values deviate specifically. CONSTITUTION:Plural pieces of temp. detecting ends 2 are embedded like A-C in the copper plate wall 1 of a casting mold in the moving direction of a billet. When a molten steel 4 forms a solidified shell 5 of a billet and the broken part 6 of the shell 5 owing to the seizure or the like between the shell 5 and the wall 1 which is the cause for breakout, the broke part 6 moves downward on progressing of casting and when said part deviates from the bottom end of the mold 1, breakout arises. The values detected by the ends A-C in this stage transfer from A to B and from B to C in temp. rise with the delay time proportional to the casting speed. The breakout is thus predicted and judged from the deviation of the >=2 consecutive values detected by the detecting ends to the high temp. side from a stationary level in succession.