A Soft Sensing Method for Zinc Ore Grade Based on Process Size Features

Abstract

A method of soft measurement of zinc flotation concentrate grade based on process characteristics. This invention combines expert knowledge and data modeling methods. First, the bubble size distribution in the image is used to characterize the foam according to the observation focus of the on-site workers when watching the bubbles. Image, according to the characteristics that on-site workers need to observe the foam state for a period of time to judge the current production state, it is proposed to use the size distribution sequence to mathematicize the current production state, and a modeling method for the foam size sequence is proposed, which reduces the dimension of the feature vector number. In the prediction algorithm, a large amount of accumulated data is used to adopt the improved lifting decision tree algorithm, which can effectively suppress the over-fitting problem caused by too fast learning and improve the generalization ability. Experiments have proved that the method of the invention is simple in calculation, fast in execution speed, high in prediction accuracy, convenient for on-site actual operation, can guide on-site operation in real time, optimize the production process, and solve the problem of difficulty in online detection of existing zinc ore grades.

Description

technical field [0001] The invention belongs to the technical field of froth flotation, and in particular relates to a method for predicting the grade of zinc flotation concentrate. Background technique [0002] Foam flotation is one of the most important beneficiation methods in zinc smelting today. Flotation is a method of sorting according to the difference in physical and chemical properties of the surface of mineral particles and according to the difference in mineral floatability. The separation process of useful minerals and their symbiotic gangues, through continuous stirring and blowing during the flotation process, a large number of air bubbles with different sizes, shapes, textures and other characteristics are formed in the slurry, and the air bubbles carry mineral particles up to the floating A foam layer is formed on the surface of the groove to realize the separation of minerals and gangue. For such a complex industrial process as froth flotation, due to the ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the difficulty of online detection of concentrate grade in the process of zinc flotation, high cost, large delay and insufficient prediction of zinc flotation concentrate grade, this invention proposes a lead-zinc A construction method for the process characteristics of the flotation foam image, and a prediction method for the concentrate grade, which has good prediction accuracy, anti-interference ability and fast operation speed

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