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Breakout is the most detrimental event associated with the continuous casting process, with the overview of the breakout prevention system, a lot of valuable things had been acquired. For breakout prevention, the embedded thermocouples had been proved best for breakout signals detecting. But in china, the system which used well in foreign countries did not fit for the current local condition, and gives error reports more often, so developing an efficient breakout system which fit for the condition of nowadays in China becomes more and more urgently.

Heat transfer of the mould flux between the mould and the strand is very complicated, especially for the high carbon steel thin slab continuous casting. In this research the orthogonal experiment has been carried out, and the results showed that: the effect for the heat flux form strong to weak is: R>Na2O>F>MgO>BaO. and in the experiment range, with the R increasing, when the R, Na2O content and the F- content are increasing, the heat flux would be decreasing; with the MgO content increasing, the crystallization temperature would getting fluctuant; with the BaO content increasing, the heat flux would getting fluctuant, when its content is around 6%, the heat flux is reach its summit.

Breakout is the most detrimental event associated with the continuous casting process, with the overview of the sticking breakout behavior, a lot of valuable things had been acquired. For the mechanism of the sticking breakout forming, the key for the breakout prevention is decreasing the probability of the hot spot; the content of the carbon or alloy element, the wear and tear of the mould corner, the mould flux, the fluctuation of the casting speed and the fluctuation of the meniscus are easy to cause the sticking; and with high casting speed and the funnel mould, the thin slab continuous casting is more easier to lead to sticking breakout than the normal strand.

Crystallization temperature is very important for the high carbon steel for thin slab continuous casting, in this research the orthogonal experiment has been carried out, and the results showed that: the effect for the flux crystallization temperature form strong to weak is: F>Na2O>R>BaO>MgO. In the experiment range, with the R, Na2O, MgO and F- content increasing, the flux crystallization temperature would be higher, but for the complicated infect of the Na2O and F-, there are some flucuations for the flux crystallization temperature, but for the BaO content increasing, the crystallization temperature of the flux would be decreasing slowly.

Viscosity is very important for the high carbon steel for thin slab continuous casting, in this research the orthogonal experiment has been carried out, and the results showed that: the effect for the flux viscosity form strong to weak is: R>F>BaO>Na2O>MgO. and in the experiment range, with the R increasing, when the R is between 0.80 and 0.90, the flux viscosity is diminished slowly; but when the R is bigger than 0.90, the flux viscosity is diminished sharply; Na2O,MgO and F- could decrease the flux viscosity; BaO could lower the melting temperature of the flux to decrease the flux viscosity.