Analysis on the causes of breakout in continuous casting and its countermeasures at JISCO

For the production of Q235 and low alloy steels,a high breakout ratio of No.4 and No.5 slab casters of JISCO occurred in recent years had become a severe problem.The high breakout ratio was attributed to operation faults and equipment problems.In this paper,the reason of breakout and the measures to prevent breakout caused by sticking and leakage are analyzed and put forward.In the condition of no breakout prediction system for continuous casting,the occurrence of breakout was successfully decreased in 2005 after adopting the corresponding countermeasures.