Article
Engineering, Chemical
Peace P. Mkhonto, Xingrong Zhang, Liang Lu, Wei Xiong, Yangge Zhu, Long Han, Phuti E. Ngoepe
Summary: By using computational density functional theory (DFT) and microflotation tests, the adsorption mechanism of thiocarbamate collectors on chalcopyrite and pyrite surfaces was investigated. The results showed different adsorption preferences on Cu and Fe atoms, with ADEDTC exhibiting the strongest adsorption. Microflotation tests confirmed the higher recovery rates of chalcopyrite compared to pyrite, with ADEDTC showing the highest recoveries. XPS analysis further supported the correlation between experiments and DFT predictions.
MINERALS ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Ahmed M. Eldosouky, Reda A. Y. El-Qassas, Luan Thanh Pham, Kamal Abdelrahman, Mansour S. Alhumimidi, Ahmed El Bahrawy, Kevin Mickus, Haytham Sehsah
Summary: This study created a new subsurface structural map of Saudi Arabia using gravity data and potential field data, revealing the relationships between major structures and gold deposits. The results indicate that central zones are important areas of gold mineralization, while fault zones parallel to the Red Sea control numerous gold mines.
Article
Mining & Mineral Processing
Tien Trung Vu
Summary: This article analyzes and assesses the geological conditions, technological parameters, and support methods of a longwall to identify the causes and rules of face spall and roof falling in fully mechanized longwalls. The author proposes solutions to prevent this phenomenon and ensure the safety of the longwall. The research results have practical implications and can be applied to troubleshoot fully mechanized longwalls in Quang Ninh coalfield, Vietnam.
MINING OF MINERAL DEPOSITS
(2022)
Article
Metallurgy & Metallurgical Engineering
Tatiana Aleksandrova, Abdalla Elbendari, Nadezhda Nikolaeva
Summary: This work aimed to upgrade a low-grade sedimentary phosphate ore through attrition scrubbing/desliming and an anionic/cationic reverse flotation technique. The results showed that using the optimized conditions, a high grade and recovery of P2O5 were achieved in the coarse size fraction through attrition scrubbing accompanied by desliming. Cationic reverse flotation was found to be more desirable in terms of achieving a high grade and recovery of P2O5 compared to anionic reverse flotation.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2022)
Article
Engineering, Geological
Anlin Zhang, Heping Xie, Ru Zhang, Mingzhong Gao, Jing Xie, Zheqiang Jia, Li Ren, Zetian Zhang
Summary: This research comprehensively analyzed the mechanical behavior of coal at different depths during mining through experiments. The results showed that with increasing depth, the strength and deformation of coal increased, the evolution of the Poisson's ratio presented a nonlinear increase, and the elastic modulus gradually decreased. The plastic deformation and progressive damage characteristics of the coal became more significant. The analysis of acoustic emission monitoring revealed that shallow coal samples failed mainly due to tensile cracking, while deep coal samples failed due to shear cracking. The energy evolution and partition characteristics were also investigated, showing an increase in the storage capacity of elastic strain energy with depth. The study also found that the damage development process of deeper coal was slower, but the damage degree was more serious. An improved damage model considering the depth effect was established. The model prediction curves agreed well with the testing values.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Mining & Mineral Processing
Han Wang, Shuming Wen, Guang Han, Yongxin He, Qicheng Feng
Summary: Pretreatment with an appropriate concentration of copper ions can improve the recovery rate of malachite, while an excessive amount of copper ions reduces the hydrophobicity of the malachite surface. Copper ion pretreatment also promotes sulfidization reactions and the formation of a sulfidization layer on the malachite surface.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Xiaojun Feng, Zeng Ding, Qinjing Hu, Xue Zhao, Muhammad Ali, Jefferson T. Banquando
Summary: This study analyzes the factors affecting the deformation and failure mechanism of deep-buried roadways and locates areas of highly concentrated deformation using stress and electromagnetic radiation monitoring data. The results show that the degree of influence of the surrounding rock and geometric parameters on the deformation of the deep-buried roadway varies. The higher the level of the surrounding rock, the more serious the deformation. Electromagnetic radiation reflects the distribution range of high-stress concentration and strength deterioration areas.
Article
Metallurgy & Metallurgical Engineering
S. K. Kawatra, V. Claremboux
Summary: The behavior of iron ore pellet binders is complex, requiring them to meet practical requirements such as dispersion, water movement control, and inter-particle bonding. The ultimate quality of pellets is determined by how they grow, and this review aims to simplify the many approaches to binders into these key requirements.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2022)
Article
Engineering, Geological
Quan Zhang, Manchao He, Shan Guo, Jingchen Qi, Jun Yang, Chao Wang, Min Xia, Luning Li
Summary: The first-generation AFRCPRC technology faced safety concerns and explosive approval issues, while the second-generation AFRCPRC technology addressed these problems by using non-explosive blasting and micro-NPR anchor cables, improving safety and ease of use. Successful coal mine experiments were conducted to demonstrate the effectiveness of the second-generation technology.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Ocean
Po Cheng, Jia Guo, Kai Yao, Xuejian Chen
Summary: This paper investigates the effect of random soil strength distribution on helical piles using large deformation random finite element analysis. The results show that soil randomness has an insignificant influence on the failure mechanism of helical piles, but there are significant variations in the probabilistic failure envelopes for different soil configurations.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Chongchong Qi, Xinhang Xu, Qiusong Chen
Summary: This study compared beta-C2S and M3-C3S in terms of their structural and electronic properties, shedding light on their differences in hydration reactivity. The results showed that the atoms became more reactive after surface relaxation, and the electrons of the surface were transferred to the adsorbed water molecules. A type of O atom with special bond characteristics existed in M3-C3S, and the reactivity of Ca and O atoms was generally higher in M3-C3S than in beta-C2S. The study further explains the differences in hydration reactivity of calcium silicates and has implications for the design of highly reactive and environmentally friendly cements.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Review
Energy & Fuels
Zhenfu Luo, Yuemin Zhao, Bo Lv, Yanhong Fu, Xuan Xu, Changshuai Chen
Summary: The pseudo-fluid characteristics of the gas-solid separation fluidized bed offer a feasible method for the dry separation of coal. Recent advancements have been made in the study of the structural design, fluidization characteristics, and separation performance. However, industrial application using complex fluidization equipment still faces challenges.
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION
(2022)
Review
Materials Science, Multidisciplinary
Guanzhou Qiu, Yufeng Guo
Summary: Titanium metal and alloy are crucial materials for China's high-tech economy, but their application is currently limited. To improve the overall level, the entire titanium industry chain should be updated, with an emphasis on improving raw material quality, reducing processing costs, and expanding consumption structures.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Engineering, Chemical
Oriana C. Barrios, Yarivith C. Gonzalez, Lucia I. Barbosa, Pablo Orosco
Summary: Chlorination roasting is an effective method for recovering lithium, manganese, nickel, and cobalt from spent lithium-ion batteries, with extraction yield increasing significantly with temperature.
MINERALS ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Mengchen Song, Liuting Zhang, Jiaguang Zheng, Zidong Yu, Shengnan Wang
Summary: Graphene-supported FeOOH nanodots were successfully prepared and incorporated into MgH2, resulting in improved hydrogen storage performance.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xing Feng, Pengfei Yin, Limin Zhang, Xiyuan Sun, Jian Wang, Liang Zhao, Changfang Lu, Zhihua Gao, Yongxin Zhan
Summary: In this study, a Co@CuFe2O4 absorbing agent was obtained through ball-milling assisted chemical precipitation and annealing method, which showed excellent impedance matching at thin thickness. The composite possessed sufficient interface polarization ability and eddy current loss due to the contact between CuFe2O4 NPs and Co. The broadband microwave absorption of the composite was also contributed by dipole polarization, electron hopping/conduction, and structural scattering. The preparation method reported here can be referenced for manufacturing electromagnetic absorbers with outstanding performance.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Koji Hagihara, Takayoshi Nakano
Summary: Additive manufacturing allows for the production of complex geometries with superior properties by controlling the microstructure and texture of the product through selecting appropriate process parameters. The use of selective laser melting is discussed as a common method to control product texture.
Article
Materials Science, Multidisciplinary
Qian Zhang, Shuming Wen, Qicheng Feng, Han Wang
Summary: This study demonstrates that the addition of ammonium phosphate and sodium sulfide enhances the sulfidization of azurite surfaces, improving the flotation performance of azurite in sulfidization-xanthate flotation.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Luis A. Cisternas, Javier Ordonez, Ricardo Jeldres, Rodrigo Serna-Guerrero
Summary: Mining resources have a significant impact on human development, but standard practices in mining and mineral processing have negative environmental impacts. While the circular economy is seen as a solution, the mining industry's reluctance to adopt new technologies and processing strategies hinders its implementation.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2022)
Article
Mining & Mineral Processing
Yonggang Zhang, Jun Tang, Yungming Cheng, Lei Huang, Fei Guo, Xiangjie Yin, Na Li
Summary: This paper proposes a dynamic way to predict landslide displacement based on the GRU neural network and CEEMDAN, and demonstrates its accuracy improvement over SVM in periodic displacement prediction through a case study. The dynamic predictive method significantly enhances accuracy by capturing the dynamic features of the inputs to optimize landslide displacement prediction.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
