Improving the Estimation Accuracy of Copper Oxide Leaching in an Ammonia–Ammonium System Using RSM and GA-BPNN
- Авторлар: Zhao M.1,2, Fang J.1,2, Zhang L.1,2, Dai Z.2, Yao Z.1,2
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Мекемелер:
- Faculty of Resource Engineering of Kunming University of Science and Technology
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
- Шығарылым: Том 58, № 6 (2017)
- Беттер: 591-599
- Бөлім: Metallurgy of Nonferrous Metals
- URL: https://journals.rcsi.science/1067-8212/article/view/226363
- DOI: https://doi.org/10.3103/S1067821217060177
- ID: 226363
Дәйексөз келтіру
Аннотация
In this study, a response surface methodology (RSM) model was used to analyze and optimize the factors affecting copper leaching efficiency in a copper oxide ammonia-ammonium (AA) system based on the parameters of AA concentration (ammonium hydroxide and ammonium bicarbonate matched with 1: 1), leaching time, grinding fineness, liquid-solid ratio, and temperature. The RSM analysis showed that five individual variables had a significant influence and that the interaction between AA concentration and leaching time had the most significant influence on leaching efficiency. In order to improve the estimation accuracy of the copper leaching efficiency, a model consisting of a genetic algorithm and a back propagation neural network (GA-BPNN) was used to optimize the operation index. A back propagation feed forward neural network with 3 layers (5–10–1) was applied to predict copper leaching efficiency. The genetic algorithm was applied to analyze the optimal leaching conditions. The results revealed that the GA-BPNN model outperformed the RSM model for predicting and optimizing copper oxide AA leaching. The optimization results of the GA-BPNN resulted in an R2 of 0.99827 and the highest predicted copper leaching efficiency of 79.49% was obtained under the conditions of an AA concentration of 4.78 mol/L, a leaching time of 157 min, a grinding fineness of 86.86% (–74 μm content account), a liquid-solid ratio of 2.87: 1, and a temperature of 313.17 K. A prediction and optimization method combining RSM and GA-BPNN, as used in this paper, can be further employed as a reliable and accurate method for ore leaching.
Авторлар туралы
Minjie Zhao
Faculty of Resource Engineering of Kunming University of Science and Technology; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
Email: fjjkmust@outlook.com
ҚХР, Kunming, 650093; Kunming, 650093
Jianjun Fang
Faculty of Resource Engineering of Kunming University of Science and Technology; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
Хат алмасуға жауапты Автор.
Email: fjjkmust@outlook.com
ҚХР, Kunming, 650093; Kunming, 650093
Lin Zhang
Faculty of Resource Engineering of Kunming University of Science and Technology; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
Email: fjjkmust@outlook.com
ҚХР, Kunming, 650093; Kunming, 650093
Zong Dai
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
Email: fjjkmust@outlook.com
ҚХР, Kunming, 650093
Zhangwei Yao
Faculty of Resource Engineering of Kunming University of Science and Technology; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
Email: fjjkmust@outlook.com
ҚХР, Kunming, 650093; Kunming, 650093