Article
Engineering, Chemical
Canneng Chen, Song Zhang, Quanjun Liu, Luzheng Chen, Yongjun Xian, Yijie Wang
Summary: This study introduces the use of ultrasonic pretreatment to enhance the flotation separation of elemental sulfur and silver-bearing lead minerals from ultrafine residue. The results show that ultrasonic pretreatment effectively liberates associated sulfur and improves the separation of sulfur and silver-bearing lead minerals. Under optimized conditions, ultrasonic pretreatment significantly improves the recovery and grade of sulfur in the concentrate, as well as the recovery of lead and silver in the tailings.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yuan Li, Dirk van Zyl
Summary: This paper presents a modified Kynch's approach to explain the hindered settling behavior of suspensions impacted by segregation. The experimental data and predicted results confirm the effectiveness of the proposed method.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yulai Zhang, Nicolas Francois, Richard W. Henley, Lydia Knuefing, Michael Turner, Mohammad Saadatfar, Frank Brink, Mark Knackstedt
Summary: This study presents a quantitative method for the 3D characterization of ore texture and breakage using X-ray micro-CT and in-situ micromechanical test. The research focuses on a porphyry copper ore and demonstrates the dominant role of internal breakage in grain boundary fracturing. The study also discusses the influence of microporous regions, size reduction, ore texture, and breakage characteristics on the degree of liberation of copper minerals.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Nieves Iglesias-Gonzalez, Antonio D. Dorado, Pablo Ramirez, Alfonso Mazuelos
Summary: A global process for recovering copper from end-of-life mobile phones is proposed, which combines bioleaching and solvent extraction and electrowinning to achieve efficient and sustainable copper recovery.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yuze Zhong, Zhaohui Tang, Hu Zhang, Yongfang Xie, Juncen Guo
Summary: Utilizing a short-long temporal graph convolution network (SLTGCN) trained with multiple froth videos, this study successfully monitors the tailings grade of the first rougher layer in a zinc flotation circuit. By treating visual features and similarity graphs as nodes and edges in a graph respectively, the proposed model makes full use of temporal information to predict the tailings grade with improved accuracy compared to existing methods.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Hanna Miettinen, Malin Bomberg, Ozlem Bicak, Zafir Ekmekci, Paivi Kinnunen
Summary: Mineral processing requires large amounts of water, and reducing water consumption through recirculation and closing water loops is important. However, this can lead to the accumulation of contaminants in the process water, which can negatively affect the process performance. In this study, the impact of microorganisms on flotation performance was investigated, and ion exchange was evaluated for removing dissolved sulfur species and microorganisms from water. The results showed that adding microorganisms had a positive effect on flotation selectivity, especially for nickel. Different water types, process water and final tailings water, behaved slightly differently. Ion exchange proved to be effective in removing sulfur species and microorganisms, and dissolved air flotation was a successful pretreatment for ion exchange in removing microorganisms.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
S. J. Neethling, D. Mesa, P. R. Brito-Parada
Summary: In this paper, a model for froth recovery that incorporates the effects of detachment and subsequent transport of particles is presented. The model is compared to experimental results and shown to accurately describe the evolution of froth recovery behavior under decreasing froth stability.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yimei Xiao, Jinchan Feng, Bingqiao Yang, Huihua Luo, Fang Zhou
Summary: In this study, the use of fulvic acid as a depressant for the flotation separation of chalcopyrite from arsenopyrite was investigated. It was found that fulvic acid strongly depressed arsenopyrite while having little influence on chalcopyrite flotation. The addition of calcium hypochlorite facilitated the adsorption of fulvic acid on arsenopyrite surface.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Wei Liu, Zhongqing Xiao, Subodh Das, Wencai Zhang
Summary: This study conducted direct acid leaching to recover rare earth elements from an allanite ore, and examined the effects of operational variables on the extraction efficiency. The results showed that under certain conditions, the extraction efficiency of rare earth elements was high.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Haoyu Li, Qian Ren, Jinfeng Tian, Shihong Tian, Jun Wang, Xuejun Zhu, Yuanhong Shang, Jiayuan Liu, Liping Fu
Summary: This study compares the conventional leaching process with the ultrasound-H2O2 synergistic enhanced process for extracting residual vanadium from calcification roasted-acid leaching tailings, and optimizes the experimental parameters. The findings show that the ultrasound-H2O2 synergistic vanadium leaching process increases the leaching rate by 63.64% and reduces energy consumption by 50%. The enhancement mechanism is attributed to the effective decomposition of H2O2 into center dot OH radicals under ultrasound, which provides higher oxidation potential and accelerates the reaction process. The process also enhances cavitation effects and increases the reaction area by destroying the composite oxide structure on the surface of the tailing particles. In conclusion, the ultrasound-H2O2 synergistic vanadium leaching process holds great potential in the management and recovery of industrial tailings.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Bo Hao, Minqiang Fan
Summary: Particle-bubble attachment is crucial in coal and mineral flotation processes. In this study, the attachment process of low-rank coal particles to the bubble surface was simulated, revealing the important role of water film rupture in particle attachment.
MINERALS ENGINEERING
(2024)
Article
Metallurgy & Metallurgical Engineering
Jinmiao Wang, Jun Xiao, Yan Xue, Lixue Wen, Dongping Shi
Summary: This paper aims to reduce the energy consumption of mine ventilation system by establishing a mathematical model and applying optimization algorithms. The experimental results demonstrate that the energy consumption of the mine can be significantly reduced, which is of great value for the safety and clean production of the mine.
MINING METALLURGY & EXPLORATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Ruyang Cao, Yunpeng Li, Chun Feng, Yiming Zhang
Summary: In the past, the selection of the number of empty holes between blast holes relied on subjective experience, leading to unsatisfactory results. This study established a numerical model and conducted simulations to determine the optimal number of empty holes for inducing crack propagation. By adjusting the number of empty holes, effective penetration and fracture zone direction can be achieved.
MINING METALLURGY & EXPLORATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Alexander Douglas, Martin Langenderfer, Catherine Johnson
Summary: This study proposes a method using UAV and haul truck's GNSS to identify and quantify defects in mine haul roads. By analyzing the road center line and generating a dense point cloud, the surface roughness and grade inconsistencies can be accurately assessed, aiding in optimizing road remediation and reducing costs.
MINING METALLURGY & EXPLORATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Peiwei Han, Zhengchen Li, Yubo Tu, Tianyi Zhao, Lianqi Wei, Shufeng Ye
Summary: This study investigated the effect of oxygen partial pressure on the volatilization percentages of valuable metals from iron-rich pyrite cinder using the chlorination-volatilization method with CaCl2 as the chlorinating agent. X-ray diffraction analysis revealed the presence of CuCl2, CuCl, PbCl2, and ZnCl2 in the volatile products. The volatilization percentages of Au and Pb were almost unaffected by oxygen partial pressure. The volatilization percentages of Cu and Zn were negatively correlated with oxygen partial pressure when the CaCl2 dosage was no more than 4 wt%, and almost uncorrelated with oxygen partial pressure at a CaCl2 dosage of 6 wt%.
MINING METALLURGY & EXPLORATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Max Barham, Tim Bauerle, Brianna Eiter
Summary: This study provided an overview of similarities and differences between fatigue-related risk and sleepiness in the mining industry, and presented a visual model to highlight these points. Expanding industry knowledge can help develop more targeted risk management practices.
MINING METALLURGY & EXPLORATION
(2023)
Article
Materials Science, Multidisciplinary
Georg Klepp
Summary: One possibility for energy storage is using fuels like hydrogen or methane, but feasible storage methods are needed. Storage by adsorption in porous media using nano-carbons, metal-organic frameworks, or metal hydrides as adsorbents is an alternative to high-pressure or cryogenic gas storage. Digital twins based on machine learning are being developed to simplify the analysis and prediction of the models. Assessing the performance of the adsorption tanks requires considering mass and energy balance, phase equilibrium, and spatial distribution of properties.
Article
Environmental Sciences
Hao Liu, Xuejie Deng, Xiaoming Shi, Zhenchao Wang, Ning Jia, Erol Yilmaz, Liguo Bian
Summary: A new filling effect index, FBR, is proposed in this study through experimental tests and theoretical analysis. The sensitivity of FBR is investigated and the control method of FBR is obtained. The results show that reducing the void between the filling body and roof and increasing the UCS of the backfill body both can significantly increase the FBR.
INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Jinxi Qiao, Ailiang Chen, Xueyi Guo, Dong Li, Junhong Lin
Summary: This paper investigates the extraction method of precious metals in spent automobile exhaust catalysts. It proposes the use of ferric chloride as an oxidant to efficiently leach palladium in a hydrochloric acid system, and further oxidize the leaching residue by hydrogen peroxide. The experimental results show that the comprehensive leaching ratios of platinum, palladium, and rhodium are relatively high.
Article
Materials Science, Multidisciplinary
Weizhi Zeng, Xiangyu Hu, Yang Yan, Bingxin Chen, Yongming Chen, Chaobo Tang, Jianguang Yang
Summary: This paper studies the process of treating zinc leaching residue by cavitation and dissociation technology, and forms the control technology of zinc leaching residue monomer through process optimization tests. The optimal conditions for treatment are a reactor temperature of 80 degrees C, a gas flow of 6 x 10-5 kg L-1, a pulp concentration of 5 g L-1, and air as the gas phase input, achieving a sulfur recovery rate of 85.4%.
