炉外的精炼指的是在钢包之中进行冶炼之过程,它是现代化炼钢工艺之中不能缺少的重要环节。在精炼过程中需要加入石灰石和萤石等辅助原料,一般传统的手工加料方式是根据钢水成份和钢水重量估计一个初值,工人用铁锹手工加料到估计值后,进行采样检验,再根据检验结果再适量加料,再检验,直到达到成份要求。手工上料耗时长且精度差,影响冶炼周期和钢水质量。为此,有研究人员在对某钢厂精炼工艺改进过程中,设计了优良的自动配料系统,以增进生产效率及称量精度。考虑到现场的恶劣环境,该套设备采用了以PLC与工控机为核心的自动控制系统。

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