Prediction method for zinc powder effectiveness coefficient in wet zinc smelting and copper removal process

Abstract

The invention discloses a prediction method for a zinc powder effectiveness coefficient in a wet zinc smelting and copper removal process. The prediction method for the zinc powder effectiveness coefficient during copper removal is established by integrating a chemical reaction stoichiometry model and a continuous stirred tank reactor material balance model in the wet zinc smelting and copper removal process and according to process parameters of copper ion concentration at an outlet and an inlet, addition quantity and flow of zinc powder, a content test value of cuprous oxide in copper slag and the like. A zinc powder effectiveness coefficient database is established based on industrial operating data, and the current zinc powder effectiveness coefficient is predicted on line by means ofa time series prediction method and an adaptive window length adjustment algorithm, so that the problems of high fluctuation of the copper ion concentration at the outlet and low qualified rate due to excessive addition or insufficient addition of the zinc powder caused by lack of measure of impurity removal efficiency in a copper removal reaction are avoided, and a necessary condition is provided for implementation of stable control of the copper ion concentration at the outlet in the in a wet zinc smelting and copper removal process.

Description

technical field [0001] The invention belongs to the technical field of process control of zinc and copper removal in hydrometallurgy, and relates to a method for predicting the effectiveness coefficient of zinc powder in the process of copper and zinc removal in hydrometallurgy. 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] Zinc powder is the only control parameter in the copper removal proc...

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Problems solved by technology

[0005] The purpose of the present invention is to compensate the gap between the actual demand for zinc powder and the theoretically calculated value in the process of copper removal, avoid the problem that the conventional method cannot accurately correct the control amount of zinc powder, and provide a method for the effectiveness of zinc powder in the process of copper removal in zinc smelting Coefficient Calculation Method

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