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简述了莱钢50 t EAF-LF(VD)-CC流程中合金钢260 mm×300 mm连铸坯质量控制集成技术的开发和应用效果。通过合理的铸坯纯净度和全程保护浇铸,二冷动态控制的二冷工艺设备设计,工艺设备精度参数群优化,热装工艺的铸坯质量在线预报判定系统等控制技术的开发,提高了铸坯质量,钢材酸浸低倍检验合格率由2007年的97.50%提高到2009年的99.01%,铸坯合格率在99.92%以上,成材率由原来的96.50%提高到96.80%,铸坯热装率由45%提高到75%。
The development and application of quality control integrated technology for 260 mm × 300 mm continuous casting billets in 50 t EAF-LF (VD) -CC process of Laiwu Iron and Steel (Group) Co. Ltd. were briefly described. Through the reasonable casting purity and full protection of the casting, the second cooling dynamic control of the second cooling process equipment design, process equipment precision parameter group optimization, the hot charging process of the slab quality online forecasting decision system and other control technology development, improve the casting Billet quality, steel pickling low pass test pass rate increased from 97.50% in 2007 to 99.01% in 2009, the slab pass rate of 99.92% or more, the finished product rate increased from 96.50% to 96.80%, hot billet The rate increased from 45% to 75%.