OPTIMIZATION OF MOLD COOLING PROCESS AT BLOOM CONTINUOUS CASTING
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摘要: 在分析攀钢大方坯连铸现行结晶器冷却能力的基础上,优化调整了结晶器冷却制度。结果表明,增大结晶器冷却强度,强化结晶器传热,结晶器出口坯壳厚度由14.5~15.0mm增至19.0~20.5mm;合理匹配结晶器宽窄面水量分配,可以促进结晶器区域凝固坯壳均匀生长,宽面、窄面坯壳厚度一致,有利于减少因初生坯壳厚度偏薄或厚薄不均产生的铸坯表面角部纵裂或凸包缺陷。Abstract: The existing cooling ability of bloom continuous casting mold at PZH Steel was evaluated, then, the mold cooling process was optimized. The practical operation shows that the solidified shell of molten steel at the exit of mold is increased from 14.5~15.0mm to 19.0~20.5mm by enhancing cooling intensity in mold, while, the solidified shell thickness is more uniform with adjusted the mold water flow distribution to balance the heat removal between wide and narrow plates, and the longitudinal corner crack is obviously reduced.
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Key words:
- bloom continuous casting /
- mold /
- cooling process /
- longitudinal corner crack
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