An automatic control method for lime addition amount in copper flotation process

Abstract

The invention discloses an automatic control method for lime addition in a copper flotation process. Firstly, the current flotation raw ore working conditions are classified through off-line data; the optimum pH setting value calculation model parameters for each classified working condition are determined; real-time Obtain the online measurement data in the copper flotation process; judge the current working condition classification according to the obtained raw ore copper grade measurement value and raw ore sulfur grade measurement value, and obtain the optimal PH setting value; according to the obtained concentrate copper grade measurement value 1. The deviation between the tailings copper grade measurement value and the grade target control range, the optimal pH setting value is automatically adjusted through the PH optimization control rule; according to the difference between the obtained pH measurement value and the optimal pH setting value The deviation and change amount, the lime addition amount is automatically adjusted through the PH stability controller adjusted by the variable coefficient. The method can ensure that the pH value of the pulp is quickly stabilized within the optimal range, thereby stabilizing the production index and ensuring 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 ...

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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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