Abstract
Impurity removal is a momentous part of zinc hydrometallurgy process. In this paper, a hybrid modeling method of mechanism modeling and parameter estimation modeling was proposed on the basis of not changing the actual production process of lead-zinc smeltery. Firstly, the overall nonlinear dynamic mechanism model was established, and then the deviation between the theoretical value and the actual detected outlet ion concentration was taken as the objective function to establish the parameter estimation optimization model. The gradient vector and Hessian matrix of the objective function with respect to the parameter vector were derived, and the algorithm based on the steepest descent and Newton method was given. Finally, using the production data of a lead-zinc smeltery in China, the model parameters were inversed. An intensive simulation validation and analysis of the dynamic characteristics shows the accuracy and the potential of the model, also in the perspective of practical implementation, which provides the basis for the optimal control of system output and the guidance for zinc powder addition.
Highlights
Zinc hydrometallurgy has been developed rapidly due to its advantages of high metal recovery, low air pollution, low energy consumption, good working conditions, easy realization of mechanization and automation [1]
The corresponding simulation diagrams are obtained to verify the effectiveness of the model and realize the prediction of the outlet ion concentration for the stage II purification process, which is of great significance for the in-depth study in the actual solution purification process of zinc hydrometallurgy
The part to be identified in this paper is the stage II purification process of zinc hydrometallurgy in a leadzinc smeltery in China
Summary
Zinc hydrometallurgy has been developed rapidly due to its advantages of high metal recovery, low air pollution, low energy consumption, good working conditions, easy realization of mechanization and automation [1]. In view of the problems existing in the research on the optimization control of the impurity removal process in the above literature, combined with the current actual process of a lead-zinc smeltery in China, the mechanism modeling for stage II purification process. The corresponding simulation diagrams are obtained to verify the effectiveness of the model and realize the prediction of the outlet ion concentration for the stage II purification process, which is of great significance for the in-depth study in the actual solution purification process of zinc hydrometallurgy
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
