Optimal control method based on oxidation-reduction potential and used for liquid zinc purification and copper removal process

A zinc liquid purification and process optimization technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem of unqualified copper ion concentration at the outlet

Active Publication Date: 2016-09-21
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to control the amount of zinc powder added in the copper removal process in real time, to avoid the problem that the concentration of copper ions at the outlet is unqualified

Method used

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  • Optimal control method based on oxidation-reduction potential and used for liquid zinc purification and copper removal process
  • Optimal control method based on oxidation-reduction potential and used for liquid zinc purification and copper removal process
  • Optimal control method based on oxidation-reduction potential and used for liquid zinc purification and copper removal process

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Embodiment 1

[0058] Embodiment 1: The copper removal process of the hydrometallurgy zinc smelting process in a certain lead-zinc factory is taken as an example to illustrate the superiority of the present invention.

[0059] The first step is to establish the relationship model between redox potential and copper ion concentration in the copper removal process and the control model of zinc powder addition, and carry out parameter identification.

[0060] In the second step, the operating condition data is collected at time T and compared with the identification data, and the adjustment instruction is determined according to the comparison result.

[0061] The third step is to perform model retraining or controller selection according to the obtained adjustment instructions. The expert rules of the controller are as follows:

[0062] R i 1 : y T ∈ [ Y ...

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PUM

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Abstract

The invention discloses an optimal control method based on an oxidation-reduction potential and used for the liquid zinc purification and copper removal process. Firstly, a relational model of the oxidation-reduction potential (ORP) and the copper ion concentration and a zinc powder adding amount control model are established and subjected to parameter identification; secondly, during zinc powder adding control, field liquid zinc flow, the ion concentration at a reactor inlet and ORP data are collected and compared with data used for parameter identification, and adjusting instructions are determined according to the comparison result; and thirdly, the zinc powder adding amount is determined according to relevant control rules according to the sent adjusting instructions, so that adding of zinc powder is controlled.

Description

technical field [0001] The invention belongs to the technical field of process control of copper removal in zinc hydrosmelting, and relates to an optimization control method for copper removal process of zinc liquid purification based on oxidation-reduction potential. Background technique [0002] As the first process of the purification process of zinc hydrometallurgy, the copper removal process is one of the key links in the purification production, and plays an important role in the qualified rate of the purified export solution and the quality of electrolytic zinc. In this process, zinc powder is continuously added in two series-connected continuous reaction stirred tanks to precipitate excess impurity copper ions in the zinc sulfate solution in the form of cuprous oxide and simple copper, and retain copper ions at a specified concentration as an activator for subsequent reactions . [0003] In the copper removal process, a large amount of copper ions are removed in the...

Claims

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Application Information

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IPC IPC(8): C22B3/46C22B19/20G05B13/04
CPCC22B3/46C22B19/20G05B13/042Y02P10/20
Inventor 阳春华张凤雪李勇刚张斌刘文德朱红求陈爱国谢永芳窦传龙
Owner CENT SOUTH UNIV
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