Automatic control method of iron ore flotation reagent dosage based on tailings grade

Abstract

The invention provides an automatic control method of an iron ore flotation reagent dosage based on tailings grade. The automatic control method includes extracting historical data from production process of iron ore flotation; solving difference value of tailings grade; setting the difference value of tailings grade and ore properties as case description and setting a flotation reagent regulatedvalue as case solution; retrieving case in a case library to acquire a group of similar values; arranging the similar values from large to small, selecting the historical cases, corresponding to frontbeta similar values, from the case library as reference cases for the current new case; reusing the case to obtain new case solution, saving the new cases in the case library, thereby completing updating of the case library. Online closed-ring control of the iron ore flotation reagent dosage can be realized according to fluctuation of the tailings grade, and accordingly safety, reliability and economic efficiency of iron ore flotation production can be improved.

Description

technical field [0001] The invention belongs to the technical field of iron ore flotation, and in particular relates to an automatic control method for the dosage of iron ore flotation reagents based on tailings grade. Background technique [0002] In the production process of iron ore flotation, the tailings usually contain more iron elements, and as the tailings are discharged, this part of the iron elements is not recovered, resulting in waste. A reasonable chemical system can effectively reduce the tailings grade, but the current chemical dosage is mostly set by manual experience, and the setting of the chemical dosage only considers the properties of the ore, and does not affect the chemical dosage through the change of the tailings grade. Perform closed-loop timely regulation control. In addition, the iron ore flotation process is a complex physical and chemical reaction process with strong nonlinearity and coupling, so it is difficult to automatically adjust the dosa...

AI Technical Summary

Problems solved by technology

[0002] In the iron ore flotation production process, the tailings usually contain a lot of iron elements. As the tailings are discharged, this part of the iron elements is not recovered, resulting in waste.

A reasonable chemical system can effectively reduce the tailings grade, but the current chemical dosage is mostly set by manual experience, and the setting of the chemical dosage only considers the properties of the ore, and does not affect the chemical dosage through the change of the tailings grade. Perform closed-loop timely adjustment control

In addition, the iron ore flotation process is a complex physical and chemical reaction process with strong nonlinearity and coupling, so it is difficult to automatically adjust the dosage of reagents by establishing a mathematical model

The neural network-based control method needs to artificially set the network structure and neuron activation function during model training. This method is highly subjective and cannot allow the neural network to objectively describe the relationship between the dosage of the drug and its various factors.

Moreover, the neural network is easily affected by the data, resulting in local optimum or over-fitting, resulting in large errors in calculation results.

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