Study on Periodic Fluctuation of CC Slab Mould Level
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 shells 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.
mould period level fluctuation array of roller
Jiang Zhongkuai Cheng Nailiang Chen Zhiping
Shanghai Meishan Iron & Steel Co., Baosteel Co., Nanjing 210039, Jiangsu, China
国际会议
The 4th Australia-China-Japan Joint Symposium on Iron and Steelmaking(第四届中日澳钢铁冶金学术会议)
沈阳
英文
255-259
2012-11-03（万方平台首次上网日期，不代表论文的发表时间）