Adaptive optimization for gold cyanidation leaching process

doi:10.3969/j.issn.0438-1157.2014.12.033

CIESC Journal ›› 2014, Vol. 65 ›› Issue (12): 4890-4897.DOI: 10.3969/j.issn.0438-1157.2014.12.033

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Adaptive optimization for gold cyanidation leaching process

ZHANG Jun¹, MAO Zhizhong^1,2, JIA Runda^1,2, HE Dakuo^1,2

1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, Liaoning, China;
2. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang 110819, Liaoning, China

Received:2014-04-01 Revised:2014-08-07 Online:2014-12-05 Published:2014-12-05
Supported by:
supported by the National High Technology Research and Development Program of China(2011AA060204) and the National Natural Science Foundation of China(61203103, 61374147).

金氰化浸出过程自适应优化

张俊¹, 毛志忠^1,2, 贾润达^1,2, 何大阔^1,2

1. 东北大学信息科学与工程学院, 辽宁沈阳 110819;
2. 东北大学流程工业综合自动化国家重点实验室, 辽宁沈阳 110819

通讯作者: 张俊
基金资助:
国家高技术研究发展计划项目(2011AA060204);国家自然科学基金项目(61203103,61374147).

Abstract

Abstract: The adaptive real-time optimization (RTO) of gold cyanidation leaching process in a hydrometallurgy plant was investigated. To solve plant-model mismatch, an adaptive real-time optimization strategy based on the modifier adaptation method was proposed, and the real plant data and gradient information were used to correct the original optimization problem iteratively to drive its solution to converge to the optimal set point for the plant. The simulation results showed that in the presence of moderate measurement noise and model uncertainty, the iterates based on the proposed adaptive strategy could converge to the optimal set point for the plant after several iterations and moreover the step of parameter estimation was not necessary, laying an important foundation for the successful implementation of the plant-wide optimization and control for hydrometallurgy process.

Key words: cyanidation leaching, mechanistic model, model uncertainty, real-time optimization, adaptive strategy

摘要： 以某湿法冶炼厂金氰化浸出过程为背景,研究了浸出过程的自适应实时优化问题.针对实际过程中的模型失配问题,提出了一种金氰化浸出过程的修正项自适应实时优化策略,利用实际过程测量值及梯度信息不断修正原优化问题,使其迭代收敛到实际过程的最优设定点.仿真结果表明在过程输出存在适量的测量噪声时,对于模型参数不确定性、结构不确定性以及工况改变3种情况,该方法经过数次的迭代最终都能够收敛到实际过程的最优设定点附近,节约了生产成本,而且不需要模型更新步骤,这为湿法冶金全流程优化控制的顺利实施奠定了重要基础.

关键词: 氰化浸出, 机理模型, 模型不确定性, 实时优化, 自适应策略

CLC Number:

TP301.6

ZHANG Jun, MAO Zhizhong, JIA Runda, HE Dakuo. Adaptive optimization for gold cyanidation leaching process[J]. CIESC Journal, 2014, 65(12): 4890-4897.

张俊, 毛志忠, 贾润达, 何大阔. 金氰化浸出过程自适应优化[J]. 化工学报, 2014, 65(12): 4890-4897.

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Adaptive optimization for gold cyanidation leaching process

金氰化浸出过程自适应优化

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