简述了攀钢板坯连铸高效化生产技术及其应用效果.通过研究开发适应高拉速要求的连铸保护渣、结晶器冷却制度和钢水温度控制制度,连铸拉速达到1.30～1.80 m/min;通过应用钢包渣改性、精炼工艺优化和高粘度连铸保护渣,IF钢冷轧板卷条痕缺陷率由10.97%降至1%以内;通过合理分配两台板坯铸机功能,推广应用中包快换水口,减少LF工序钢水加热时间和提高RH连续处理能力等技术,铸机作业率由平均89.39%增至92.96%.为攀钢2008年上半年板坯产量达154万t提供了重要的技术支撑.
Technologies of high efficient slab caster and its application effect at PISCO (Panzhihua Iron ＆ Steel Co. ) were presented. The casting speed was increased to the range between 1. 30 m/min and 1.80 m/min owing to developing reasonable mold flux, primary cooling scheme and molten steel temperature control. The rate of sliver defect on cold -rolled sheet was decreased from 10.97% to 1% due to adjus-ting compositions and performance of steel slag, optimizing refining process, and designing high viscosity flux. Meanwhile, the mean operating rate of slab caster was increased from 89.39% to 92.96% benefit from reasonable distributing function between two slab casters, applying quick exchanging for nozzle, re-ducing reheating time of molten steel at LF, and improving production capacity of RH. These achieve-merits have provided important technology supports for PISCO to obtain 154 million tons product of contin-uously cast slab in half a year of 2008.
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