Zinc ore grade soft measurement method based on process size feature

Abstract

The invention discloses a zinc floatation concentrate grade soft measurement method based on a process feature. According to the method, expert knowledge and a data modeling method are synthesized. Bubble images are represented through utilization of bubble size distribution in the images according to an observation emphasis when an onsite worker watches bubbles. For the feature that the onsite worker needs to observe bubble states in a period of time to judge a current production state, the fact that the current production state is mathematized through utilization of a size distribution sequence is provided, a modeling method for a bubble size sequence is also provided, and the dimensionality of a feature vector is reduced. In a prediction algorithm, an improved boosting decision tree algorithm is employed through utilization of a great deal of accumulated data, the overfitting problem resulting from excessively fast learning is effectively suppressed, and the generalization capability is improved. An experiment shows that the method provided by the invention is simple in computing, relatively fast in execution speed, relatively high in prediction accuracy and is convenient for onsite practical operation, the onsite operation can be guided immediately, a production process is optimized, and the problem that the existing zinc ore grade online detection is difficult is solved.

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 ...

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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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