Method for automatically controlling lime addition amount in copper flotation process

Abstract

The invention discloses a method for automatically controlling the lime addition amount in a copper flotation process. The method comprises: classifying the current crude ore flotation working conditions through off-line data; determining the optimal PH set value calculation model parameters under each classified working condition; real-timely obtaining the online measurement data in a copper flotation process; judging the classification of the current working conditions according to the obtained raw ore copper grade measurement value and the crude ore sulfur grade measurement value to obtainthe optimal PH set value; according to the deviation between the obtained concentrate copper grade measurement value and the grade target control range and between the tailings copper grade measurement value and the grade target control range, automatically adjusting the optimal PH set value through a PH optimization control rule; and according to the deviation between the obtained PH measurementvalue and the optimal PH set value and the change amount, automatically adjusting the lime addition amount through a pH value stabilization controller capable of adjusting in a variable coefficient manner. With the method of the present invention, the pH value of the ore slurry can be rapidly stabilized within the optimal range so as to stabilize the production index and ensure the stable operation of the flotation process.

Description

technical field [0001] The invention relates to the technical field of automatic control of the dressing and smelting process industry, in particular to an automatic control method for lime addition in a copper flotation process. Background technique [0002] For the copper flotation process in the mineral processing process, lime is the most common regulator. The amount of lime added directly affects the pH value of the pulp, which in turn affects the flotation of the mineral, which has a negative impact on the stability of the final product index. Due to the frequent fluctuation of raw ore properties in the actual beneficiation production process, the corresponding lime addition amount needs to be adjusted manually frequently. [0003] Because the existing technical solutions rely too much on manual detection and manual experience operation, the stability of pH control in the actual flotation process is not good; and once the working conditions change, the operator has no ...

AI Technical Summary

Problems solved by technology

[0003] Because the existing technical solutions rely too much on manual detection and manual experience operation, the stability of pH control in the actual flotation process is not good; and once the working conditions change, the operator has no way of knowing the optimal control range of pH. Most of them are based on touch-and-search experience adjustments, which further lengthens the stable cycle of production indicators and easily causes economic losses

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