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首页> 外文会议>The 4th Australia-China-Japan joint symposium on iron and steelmaking >Study on Periodic Fluctuation of CC Slab Mould Level
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Study on Periodic Fluctuation of CC Slab Mould Level

机译：CC板坯结晶度的周期性波动研究

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Study on periodic fluctuation of mould level due to non-controlled factors is described in this paper,which includes that insufficient secondary cooling during continuous casting of low carbon steel causes bulging,uneven initial shell's thickness of peritectic steel makes bulging,and periodic shedding of the deoxidization products in the nozzle creates periodical fluctuation of steel flowing.According to the relevant data analysis of mould level periodic fluctuation for peritectic steel in a certain steel plant,it was found that the mould level fluctuation period was in precise direct proportion to the roller space,i.e.T=L/V(T is mould level fluctuation period,L is roller space for adjacent rollers,V is drawing speed of continuous caster),it was shown that main causes of mould level periodic fluctuation was casting blank bulging shell periodically extruded by segment section with equal roller space.Through changing roller space of certain segment sections,probability of mould level periodic fluctuation decreased to lower than original 50％,fluctuation scope reduced greatly.Results showed that the most effective method of resolving mould level fluctuation was to design segment sections with unequal roller space,self-compensating of mould level auto-controlling system for decreasing mould level fluctuation had some limits and its effect was unsteady,effect of adjusting cooling intensity (including powder and cooling water) was limited,which had no steady effect.
机译：本文介绍了由于非控制因素引起的结晶器液面周期性波动的研究，其中包括低碳钢连续铸造过程中的二次冷却不足会导致鼓胀，包晶钢的初始外壳厚度不均匀会导致鼓胀，以及周期性的脱落。喷嘴中的脱氧产物产生钢水的周期性波动。根据某钢厂包晶钢结晶器液面周期性波动的相关数据分析，发现结晶器液面波动时期与辊间距成正比。 ，即T = L / V（T为模具高度波动周期，L为相邻辊的辊间距，V为连铸机的拉拔速度），表明模具高度周期性波动的主要原因是铸坯鼓胀壳的周期性挤压。具有相等辊距的扇形段。通过改变某些扇形段的辊距，每模模数的可能性结果表明，解决模具液位波动最有效的方法是设计辊间距不等的分段段，对模具液位自动控制系统进行自动补偿以减小模具液位波动有一定的极限，其效果不稳定，调节冷却强度（包括粉体和冷却水）的效果有限，没有稳定作用。

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