Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Comparative Study on Supervised Machine Learning Algorithms for Copper Recovery Quality Prediction in a Leaching Process

Version 1 : Received: 12 February 2021 / Approved: 16 February 2021 / Online: 16 February 2021 (13:33:53 CET)

A peer-reviewed article of this Preprint also exists.

Flores, V.; Leiva, C. A Comparative Study on Supervised Machine Learning Algorithms for Copper Recovery Quality Prediction in a Leaching Process. Sensors 2021, 21, 2119. Flores, V.; Leiva, C. A Comparative Study on Supervised Machine Learning Algorithms for Copper Recovery Quality Prediction in a Leaching Process. Sensors 2021, 21, 2119.

Journal reference: Sensors 2021, 21, 2119
DOI: 10.3390/s21062119

Abstract

The copper mining industry is increasingly using artificial intelligence methods to improve cop-per production processes. Recent studies reveal the use of algorithms such as Artificial Neural Network, Support Vector Machine, and Random Forest, among others, to develop models for predicting product quality. Other studies compare the predictive models developed with these machine learning algorithms in the mining industry, as a whole. However, not many copper mining studies published compare the results of machine learning techniques for copper recovery prediction. This study makes a detailed comparison between three models for predicting copper recovery by leaching, using four datasets resulting from mining operations in northern Chile. The algorithms used for developing the models were Random Forest, Support Vector Machine, and Artificial Neural Network. To validate these models, four indicators or values of merit were used: accuracy (acc), precision (p), recall (r), and Matthew’s correlation coefficient (mcc). This paper describes dataset preparation and the refinement of the threshold values used for the predictive variable most influential on the class (the copper recovery). Results show both a precision over 98.50% and also the model with the best behavior between the predicted and the real. Finally, the models obtained show the following mean values: acc=94.32, p=88.47, r=99.59, and mcc=2.31. These values are highly competitive as compared with those obtained in similar studies using other approaches in the context.

Keywords

Data analysis; Artificial Intelligence; Machine Learning; Knowledge Engineering; Computers and information processing, Data analysis; Data Processing.

Subject

MATHEMATICS & COMPUTER SCIENCE, Algebra & Number Theory

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