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矿浆中和过程中基于模型预估模糊自适应控制

DOI: 10.3969/j.issn.1005-3026.2014.05.003, PP. 617-621

Keywords: 矿浆中和过程,模型预估控制,模糊自适应控制,延时系统

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Abstract:

氢氧化镍钴矿浆用已有的中和过程闭环控制方法,在受到随机干扰影响的情况下,常会造成终点pH值偏离目标值,影响后续工艺过程的矿浆沉淀性能,降低镍钴氢氧化物的产品质量.提出模型预估与模糊自适应相结合的控制方法,通过模型预估控制尽量消除大滞后带来的影响,采用模糊自适应控制可以及时、有效地调整石灰石浆流量的设定值,采用PI控制器跟踪其设定值,从而满足pH值的工业过程控制要求.在国外某大型氢氧化镍钴冶炼厂的成功应用,表明该方法有效地解决了中和过程存在的大滞后时变等问题,使得氢氧化镍钴矿浆中和过程稳定运行,提高镍钴金属成分的回收率.

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