湿法炼锌过程中pH值先进控制的研究

Advanced Control Research of pH Value During Wet Zinc Metallurgy

在湿法炼锌生产中,pH值在浸出过程中的控制好坏不仅直接影响到锌焙砂的浸出量和浸出率,而且还制约着后续工序的产量和质量。而pH值中和过程中高度非线性,一直是控制界的难点。文中针对这一问题提出了把基于预测函数控制的非线性PID控制,用于湿法炼锌的pH过程控制中,以提高浸出过程中pH的控制精度。并与传统的PID控制进行了实验仿真及各级中、酸性浸出槽pH现场控制的实时曲线比较。

During the course of wet zinc metallurgy,the pH value not only effects the leaching quantity and leaching yield of the zinc calcine,but also restricts the output and the quality of subsequent working procedure.The pH value is nonlinear,it is too hard to control.This paper used nonlinear PID controlling for pH process controlling in the wet zinc metallurgy in order to increase pH controlling precision.The paper compared it with traditional PID controlling based on experiment simulation and on real-time curve of pH control at all leaching vat.