Study on thermal activation and its non-isothermal kinetics of chalcopyrite

被引：0
作者：
Wu Y. [1 ]
Liao Y. [1 ]
Ma H. [1 ]
Ji G. [1 ]
Liu Q. [1 ]
Xi J. [1 ]
机构：
[1] Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 02期
基金：
中国国家自然科学基金;
关键词：
chalcopyrite; chase change; non-isothermal kinetics; pyrolysis;
D O I：
10.11817/j.issn.1672-7207.2023.02.005
中图分类号：
学科分类号：
摘要：
In order to study the dynamic behavior of non-isothermal pyrolysis of complex polymetallic chalcopyrite, thermogravimetric differential scanning calorimetry(TG-DSC) analysis was carried out in argon atmosphere. The activation energy(Eα), pre-exponential factor(A) and mechanism function of the pyrolysis of complex polymetallic chalcopyrite were calculated by the methods of FWO, Kissinger and Coats-Redfern, and the mineral phase structure and morphology of pyrolyzed products were characterized by XRD and SEM-EDS. The results show that chalcopyrite in the raw material is transformed into corresponding copper and iron sulfides after pyrolysis, and the morphology of pyrolyzed products changes to loose multi-granular shape with cracks from the dense massive structure of the raw material, and that the pyrolysis of chalcopyrite can be divided into two stages. The first stages carried out at the temperature of 40 − 300 ℃, which is consistent with the R3 model(volume shrinkage model) with the apparent activation energy(Eα) of 11.422 kJ/mol and the logarithm of pre-exponential factor(lgA) of −1.882. The second stage occurs at the temperature in the range of 300−650 ℃, which conforms to AE4 model(Avrami-Erofeev equation) with the apparent activation energy(Eα) of 134.233 kJ/mol, and the logarithm of pre-exponential factor (lgA) of 9.777. © 2023 Central South University of Technology. All rights reserved.
引用
收藏
页码：443 / 455
页数：12
相关论文
共 29 条
[1]  
LIAO Yalong, ZHOU Juan, HUANG Feirong, Et al., Optimization of selective leaching technology of complex sulfide copper ore by response surface methodology, The Chinese Journal of Nonferrous Metals, 26, 1, (2016)
[2]  
KARTAL M, XIA Fang, RALPH D, Et al., Enhancing chalcopyrite leaching by tetrachloroethylene-assisted removal of sulphur passivation and the mechanism of jarosite formation, Hydrometallurgy, 191, (2020)
[3]  
YANG Baojun, LUO Wen, WANG Xingxing, Et al., The use of biochar for controlling acid mine drainage through the inhibition of chalcopyrite biodissolution, Science of the Total Environment, 737, (2020)
[4]  
ZHAO Hongbo, ZHANG Yisheng, ZHANG Xian, Et al., The dissolution and passivation mechanism of chalcopyrite in bioleaching: an overview[J], Minerals Engineering, 136, (2019)
[5]  
NOURMOHAMADI H, ESRAFILI M D, AGHAZADEH V., DFT study of ferric ion interaction with passive layer on chalcopyrite surface: elemental sulfur, defective sulfur and replacement of M<sup>2+</sup> (M=Cu and Fe) ions, Computational Condensed Matter, 26, (2021)
[6]  
WU Shifa, YANG Congren, QIN Wenqing, Et al., Sulfur composition on surface of chalcopyrite during its bioleaching at 50 ℃ [J], Transactions of Nonferrous Metals Society of China, 25, 12, (2015)
[7]  
MCDONALD R G, MUIR D M., Pressure oxidation leaching of chalcopyrite. Part I. Comparison of high and low temperature reaction kinetics and products[J], Hydrometallurgy, 86, 3, (2007)
[8]  
TIAN Zuyuan, LI Haodong, WEI Qian, Et al., Effects of redox potential on chalcopyrite leaching: an overview, Minerals Engineering, 172, (2021)
[9]  
PRAMEENA B, ANBALAGAN G, GUNASEKARAN S, Et al., Structural, optical, electron paramagnetic, thermal and dielectric characterization of chalcopyrite[J], Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 122, (2014)
[10]  
AKCIL A, CIFTCI H., Metals recovery from multimetal sulphide concentrates (CuFeS<sub>2</sub>-PbS-ZnS): combination of thermal process and pressure leaching[J], International Journal of Mineral Processing, 71, (2003)
123