结晶器渣圈对渣道压力、振痕及渣耗影响的分析

对比分析了三种类型结晶器渣圈,阐明了渣圈对连铸坯生产过程的影响。结果表明,当渣圈存在时,渣道动态压力变化幅度显著增大,最大正压由1.373 k Pa提高到21 k Pa,压力增大导致振痕产生,渣圈越厚,振痕越深;同时,渣圈会影响保护渣的消耗量,无渣圈时,最大渣耗量为0.009 7 kg/(m·s),渣圈存在时,最大渣耗量降至0.007 kg/(m·s),较厚的渣圈会使渣道宽度变窄,在振动负滑脱中期降低保护渣的消耗量。

Analysis on Influences of Mold Slag Rim on Channel Pressure,Oscillation Marks and Slag Consumption

The influences of slag rim on the process of continuous casting strand production were explained based on the comparative analysis of three different types of mold slag rims. The results show that when slag rim was used, the amplitude of variation of the dynamic channel pres-sure changed significantly, indicating that the maximum positive pressure increased to 21 kPa from 1.373 kPa, which caused the oscillating marks and the thicker the slag rim was, the deeper the os-cillating marks would be. At the same time, slag rim would have influence on consumption of the slag. When slag rim was not used, the maximum consumption of slag was about 0.009 7 kg/(m.s) while slag rim was used, the maximum consumption of slag was decreased to 0.007 kg/(m.s). And also thicker slag rim would make the width of slag channel narrow down, which would cut down the consumption of slag during the metaphase of negative strip time in oscillation.