Article
Metallurgy & Metallurgical Engineering
Hector M. Lizama
Summary: In-situ leaching assisted by geophysical techniques were used to exploit previously leached and long-abandoned copper sulphide heaps. The technology was first piloted for five months at the 59 kt scale with up to three in-jection wells. This was followed by a 14-month industrial pilot at the 1.2 Mt. scale with 97 injection wells. Geophysical surveys were used to visualize the movement of the injected leaching solutions in-situ. Geophysical imaging was also used to avoid flooding and prevent geotechnical instability. The imaging indicated the injection wells had a radius of influence of 11 to 13 m, and that well injection flows should not exceed 1.5 L/s. Oxidative conditions were facilitated in-situ by encouraging air entry from the heap drainage system and alternating periods of injection with rest periods that allowed air entry through the injection wells. This work introduces some concepts and terms related to in-situ leaching operations.
Article
Environmental Studies
Glen T. Nwaila, Hartwig E. Frimmel, Steven E. Zhang, Julie E. Bourdeau, Leon C. K. Tolmay, Raymond J. Durrheim, Yousef Ghorbani
Summary: The concept of the 4th industrial revolution is becoming increasingly important in the modern mining sector, as it determines the sustainability, success, and competitiveness of the industry. The digital transformation of the mining industry, particularly in terms of energy efficiency and environmental sustainability, has been a topic of debate. This review provides an overview of the technologies and techniques that can help reduce mining waste.
Review
Green & Sustainable Science & Technology
Leiming Wang, Shenghua Yin, Aixiang Wu
Summary: The study reviews the significance of ore agglomeration for copper metal recovery and the impact of agglomeration behavior on leaching reactions, discussing key factors and parameters, quality evaluation and process control, as well as mass transfer, dual pore structure, and flow behavior.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Xiaoyu Meng, Hongbo Zhao, Yu Zhao, Li Shen, Guohua Gu, Guanzhou Qiu
Summary: In this study, semi-industrial scale heap leaching of 200 t ion adsorption rare earth ores was conducted using biosynthetic citrate/(Na)3Cit as the lixiviant. An organic precipitation method using oxalic acid was proposed to effectively recover rare earth elements (REEs) and reduce production cost. The heap leaching efficiency of REEs reached 98% with a lixiviant concentration of 50 mmol/L and a solid-liquid ratio of 1:2. The lixiviant can be regenerated during the precipitation process, with REE yields of 94.5% and impurity aluminum yields of 7.4%. The work provides an eco-friendly alternative for IRE-ore extraction and proves feasibility for further industrial tests and production in situ (bio)leaching processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Xiu-Tong Li, Zhong-Sheng Huang, Ye Huang, Zhen Jiang, Zong-Lin Liang, Hua-Qun Yin, Guang-Ji Zhang, Yan Jia, Ye Deng, Shuang-Jiang Liu, Cheng-Ying Jiang
Summary: Monitoring the microbial community in bioleaching system is crucial for controlling process parameters and enhancing leaching efficiency. This study investigated the geo-chemical parameters and microbial community structure in a bioleaching heap and leachate. The results revealed that pH, Cu, Fe, and total sulfur contents were major factors shaping the microbial communities in the bioleaching system. The abundance of sulfur and iron oxidizers was significantly higher in the leaching heap than in the leaching solution, while members of Leptospirillum and unclassified Archaea were abundant in the leaching solution and showed strong interactions with members of Thermoplasmatales. This study provides theoretical guidance for future process design and control of microbial community in heap leaching.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Lei Tian, Ao Gong, Xuangao Wu, Xiaoqiang Yu, Zhifeng Xu, Lijie Chen
Summary: An ammonia-based system was utilized to selectively leach cobalt (Co) from an African high-silicon low-grade Co ore, while inhibiting other elemental impurities from leaching. The process was shown to be simple and environmentally friendly, achieving a Co leaching ratio of up to 95.61% using (NH4)(2)SO4 under specific conditions. The leaching kinetics of Co indicated that the process was controlled by an interfacial chemical reaction, and a developed model was established to express the leaching behavior of Co.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Mohammad Mokmeli, Masoumeh Torabi Parizi
Summary: This study compared the technical and economic feasibility of pyrometallurgical and hydrometallurgical treatment of low grade chalcopyrite ore, showing that while hydrometallurgical treatment has higher operating costs, the higher sales revenue makes it more favorable.
Article
Engineering, Environmental
Marja Rinne, Heini Elomaa, Mari Lundstrom
Summary: The study evaluated the cradle-to-gate impacts of cobalt sulfate recovery from unutilized cobalt- and gold-bearing ores. It found that improving treatment of cobalt-containing wash waters and optimizing oxygen utilization efficiency in pressure leaching could significantly reduce environmental impacts. Additionally, optimizing concentrate solutions based on experimental data on mineral processing steps could further improve cobalt recovery.
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
(2021)
Article
Environmental Studies
Yongbo Li, Mark Christhian Barrueta Pinto, D. Thresh Kumar
Summary: The mining sector is often criticized for its negative impacts on society and the environment. This study focuses on exploring influential sustainability indicators and their corresponding dimensions in the Chinese mining sector. Using a multi-criteria decision making tool called DEMATEL, the study evaluates and identifies the most influential sustainability indicators for Chinese mining.
Article
Engineering, Environmental
Kaleisha D. Miller, Matthew J. Bentley, Joseph N. Ryan, Karl G. Linden, Caleb Larison, Benjamin A. Kienzle, Lynn E. Katz, Alana M. Wilson, Jordan T. Cox, Parthiv Kurup, Kurt M. Van Allsburg, James McCall, Jordan E. Macknick, Michael S. Talmadge, Ariel Miara, Kurban A. Sitterley, Anna Evans, Kiran Thirumaran, Mini Malhotra, Susana Garcia Gonzalez, Jennifer R. Stokes-Draut, Shankararaman Chellam
Summary: This study aims to evaluate the impact of mining on local water supplies and environments and identifies research directions for implementable, reliable, and cost-effective advanced water treatment in the mining sector. By reviewing existing literature and conducting case studies, this study reveals the water usage in mining, treatment technologies, and the potential for beneficial reuse. The study also assesses the national level impacts resulting from the reuse of treated mine source water.
ACS ES&T ENGINEERING
(2022)
Article
Engineering, Chemical
Feiyu Zhang, Yaru Cui, Xihong He, Chaofei Lv, Linbo Li, Jinfeng Zhang, Junfang Nan
Summary: In order to eliminate the adverse effect of antimony on gold extraction from Sb-bearing refractory gold ores, a sodium sulfide leaching method was used to selectively remove antimony. The analysis of raw materials indicated that antimony in the ores exists mainly as stibnite with small amounts of oxides, while gold is mainly wrapped up in sulfides and silicates. The effects of sodium sulfide and sodium hydroxide concentration, temperature, leaching time, and liquid-solid ratio on the extraction rate of antimony and gold were investigated. The optimized process yielded extraction rates of 94.15% for antimony and 3.37% for gold, which were consistent with the predicted values of the regression equation.
MINERALS ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Defeng Liu, Wenxin Yan, Zhenyue Zhang, Wenda Guo, Ruan Chi
Summary: This study used column leaching experiments, CT scanning, numerical simulation, and fractal theory to investigate the continuously weakening mechanism of heap leaching velocity for weathered rare earth ores with increasing burial depth. The variation characteristics of pore structure and the seepage law of solution during leaching at different depths were explored. The results showed that the decrease in leaching velocity was mainly due to the variation of characteristic parameters of the pore structure in the lower ore samples. The research results are helpful in enriching the basic theory of heap leaching of weathered rare earth ores.
Review
Engineering, Environmental
Valerio Funari, Helena Gomes, Daniela Coppola, Giovanni Andrea Vitale, Enrico Dinelli, Donatella de Pascale, Marzia Rovere
Summary: Research on selenium has increased due to its extensive use in various industries, with new discoveries highlighting its importance in medical biotechnology and human health. Challenges and opportunities associated with selenium recovery from unconventional ores are identified, with potential for full-scale development of non-commercial processes. Advances in mining from alternative and urban sources may offer a stable and diversified supply of selenium in the future, considering its scarcity and commercial value.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Environmental Studies
Samuel Famiyeh, Robert A. Opoku, Amoako Kwarteng, Disraeli Asante-Darko
Summary: Based on institutional theory, a study in Ghana's mining sector found that coercive and normative pressures are significant drivers of sustainability decisions, while mimetic institutional pressures primarily impact environmental and social sustainability. The research suggests that understanding various institutional pressures is crucial for guiding sustainability policies in mining organizations.
Review
Environmental Sciences
Szymon Kalisz, Katarzyna Kibort, Joanna Mioduska, Marek Lieder, Aleksandra Malachowska
Summary: Waste generated from mining activities is a serious issue, and this work reviews the management of waste from metals ores, coal, oil and natural gas mining. It discusses the possibilities, benefits, disadvantages, and environmental impact of waste management, as well as the importance of implementing a circular economy and sustainable development in this industry.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Wei Chen, Shenghua Yin, I. M. S. K. Ilankoon
Summary: This study investigated the dynamics of bacterial community and copper leaching during low-grade copper sulphide bioleaching with forced aeration. The results showed that appropriate aeration improved bacterial concentrations and leaching efficiencies. Attached bacteria played a significant role in the early stages of bioleaching, while free bacteria dominated the later stages due to the formation of a passivation layer.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Review
Engineering, Civil
Sandun M. Dassanayake, Ahmad A. Mousa, Saman Ilankoon, Gary J. Fowmes
Summary: The paper presents the long-standing knowledge on internal instability phenomenon in soils, discussing the current research status and issues related to susceptibility to suffusion. It combines different methods to deepen the understanding of this phenomenon.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Agricultural Engineering
Yi An Lim, Nicholas M. H. Khong, Sajeewa Dilshan Priyawardana, Khi Rern Ooi, I. M. S. K. Ilankoon, Meng Nan Chong, Su Chen Foo
Summary: Microalgae species, Chlorella and Chlamydomonas, showed increased biomass concentration under elevated CO2 levels due to their cell concentrations, while Chlorella and Nostoc exhibited enhanced cell sizes at high CO2 concentrations. These findings provide new insights for designing carbon capture and storage schemes and biochemical production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Arshia Fathima, Yong Zheng Liam, Imsk Ilankoon, Meng Nan Chong
Summary: Mathematical modelling is crucial for the scale-up of microbial fuel cells (MFC). In this study, data-driven correlations were developed to predict the areal power density of a batch-fed dual-chamber MFC. Results showed that logistic kinetics outperformed Monod kinetics, and sensitivity analysis improved model predictions.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Marc van der Meide, Carina Harpprecht, Stephen Northey, Yongxiang Yang, Bernhard Steubing
Summary: This study investigated the environmental impacts of cobalt production and found that they could likely increase over time, with a strong dependence on recycling market share and energy transition. The study also found that the energy transition can offset the increase in climate change impacts caused by other impacts such as human toxicity.
JOURNAL OF INDUSTRIAL ECOLOGY
(2022)
Article
Engineering, Environmental
Takuma Watari, Stephen Northey, Damien Giurco, Sho Hata, Ryosuke Yokoi, Keisuke Nansai, Kenichi Nakajima
Summary: Moving towards a 1.5 degrees C world could significantly impact the global copper cycle through decarbonization technologies and emissions budget. The study shows a substantial increase in copper demand, primarily driven by renewable energy-based power plants and electric vehicles. However, the emissions from the copper cycle may exceed the emissions budget, highlighting the need for collective action and mitigation efforts.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Aerospace
B. A. C. S. Jayathilake, I. M. S. K. Ilankoon, M. N. P. Dushyantha
Summary: This critical review examines the geotechnical challenges of lunar regolith excavations and discusses various concepts and methods to mitigate these challenges. It highlights the importance of optimizing geotechnical considerations and presents potential measures to overcome issues such as resistive forces, dust generation, and equipment wear and tear.
Review
Environmental Sciences
Arshia Fathima, Jessie Yuk Bing Tang, Apostolos Giannis, I. M. S. K. Ilankoon, Meng Nan Chong
Summary: This article reviews the importance of metal recovery from e-waste, focusing on the example of copper recovery through electrowinning. The challenges of this method and possible solutions, such as catalysts and coupled systems, are discussed. Electro-catalysts have been found to improve the electrowinning process, while coupled systems can reduce energy consumption.
Article
Engineering, Chemical
Diyasha Sengupta, I. M. S. K. Ilankoon, Kai Dean Kang, Meng Nan Chong
Summary: E-waste is one of the fastest growing solid waste streams, and India is the third largest e-waste generating country. However, the formal e-waste recycling rate in India is less than 10%. Informal e-waste collectors and value recovery operations handle a significant portion of e-waste, but their methods pose severe threats to human health and the environment. Improvements are needed in both formal and informal e-waste collection and value recovery operations to establish a more sustainable industry.
MINERALS ENGINEERING
(2022)
Article
Thermodynamics
Wen Cai Ng, Tridib Saha, I. M. S. K. Ilankoon, Meng Nan Chong
Summary: In this study, a novel hierarchical photoanode structure of Ag/{1 1 1}Ag3PO4/PANI/Pt was synthesized, demonstrating a new and facile approach to design a high-performing Ag3PO4-based photoanode for visible-light-driven solar green hydrogen generation. By utilizing PANI and Pt NPs as a hole-transporting layer and co-catalysts, respectively, this novel photoanode achieved a record photocurrent density, outperforming previous Ag3PO4-based photoanodes.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Chemical
Kai Dean Kang, I. M. S. K. Ilankoon, Meng Nan Chong, Ta Yeong Wu
Summary: This study investigates value recovery using coarse printed circuit boards (PCBs) through organic swelling pre-treatment. The experiment demonstrates the effectiveness of organic swelling in causing cracks and delamination in the multi-layered structure of the PCBs. Copper concentrate with high copper contents can be obtained by performing organic swelling for coarse PCBs. The weakened PCBs after organic swelling can be subjected to a less energy-intensive mechanical method to yield embedded copper foils.
MINERALS ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Yi An Lim, I. M. S. K. Ilankoon, Meng Nan Chong, Su Chern Foo
Summary: This study aims to improve the growth of microalgae and enhance their CO2 capturing ability. By designing different gas spargers and studying their mixing performances, it was found that customised sintered metal spargers achieved higher mixing performances. These findings are important for the scale-up studies of photobioreactors and the realization of the circular bioeconomy concept.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Nimila Dushyantha, I. M. Saman K. Ilankoon, N. P. Ratnayake, H. M. R. Premasiri, P. G. R. Dharmaratne, A. M. K. B. Abeysinghe, L. P. S. Rohitha, Rohana Chandrajith, A. S. Ratnayake, D. M. D. O. K. Dissanayake, N. M. Batapola
Summary: Sri Lanka, rich in gem resources, has potential to use gem mining waste as a secondary source for rare-earth elements (REEs) but detailed research and value recovery processes are needed.
Article
Geosciences, Multidisciplinary
Nimila Dushyantha, Nalin Ratnayake, Ranjith Premasiri, Nadeera Batapola, Hemalal Panagoda, Chulantha Jayawardena, Rohana Chandrajith, I. M. Saman K. Ilankoon, Sudath Rohitha, Amila Sandaruwan Ratnayake, Bandara Abeysinghe, Kithsiri Dissanayake, Pubudi Dilshara
Summary: Rare earth elements (REEs) are critical elements globally due to their indispensable applications in high-tech industries. Exploitation of secondary REE deposits is essential as identified primary resources cannot meet the increasing demand. This study investigates the REE potential in lake sediments near the Eppawala Phosphate Deposit (EPD) in Sri Lanka. Results show that downstream lake sediments have higher concentrations of total REEs (TREE), light REEs (LREE) and heavy REEs (HREE) compared to upstream lake sediments, suggesting the EPD as the main REE source and the Jaya-Ganga water canal as the main transport medium. The downstream lake sediments, with their relatively high REE grade, could be a potential secondary source for future REE exploitation.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Engineering, Environmental
Wen Cai Ng, Meng Nan Chong, I. M. S. K. Ilankoon, Joey D. Ocon
Summary: A novel Ag/Ag3PO4 interfaced photoanode was successfully synthesized by controlling the oxidation of Ag foil. The photoanode has a top porous layer of {111} facets-bounded Ag3PO4 tetrahedrons layer. The optimized Ag/Ag3PO4 interfaced photoanode achieved an unprecedentedly high photocurrent density of 4.19 mA/cm(2) at 1 V vs Ag/AgCl with an accompanying measured H-2 evolution rate of 49.08 mu mol/h cm(2).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Benjamin De Castro, Mostafa Benzaazoua, Soumali Roychowdhury, Aurelie Chopard, Francis Quintal Lauzon, Benoit Plante
Summary: This study proposes an innovative method using deep learning algorithm and reflected light optical imaging to automatically detect all particles and minerals in acrylic resin polished sections. The experimental results show that this method can accurately detect all mineral particles, including transparent minerals, under reflected light optical microscopy, and provide unbiased mineralogical quantification.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Qiushi Song, Xinyu Du, Changlu Shan, Hongwei Xie, Zhiqiang Ning, Kai Yu
Summary: This study investigated the effect of magnetic stirring on the microstructure of Co deposits during electrowinning in a chloride solution. It was found that magnetic stirring effectively reduced the negative influence of H2 bubbles on the structure of Co deposits and changed their nucleation and growth behavior, resulting in the preparation of high-quality columnar Co crystals.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Tao Ge, Xiaowei Zhou, Liang Xu, Yan Sun, Cheng Yang, Yongpan Tian, Zhuo Zhao
Summary: In this study, the extraction performance and complexation mechanism of p-di-ethyl-amino-methylthiacalix[4]arene (L) towards Pt(IV) were investigated. The results indicated that L had excellent complexation ability towards Pt(IV) and could selectively extract it from a solution containing multiple competing ions.
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
Yi Fang, Aurora Robledo-Cabrera, Changsheng Peng, Shan Huang, Qi Xiao, Alejandro Lopez-Valdivieso
Summary: With the assistance of mechanical ball milling, the partially oxidized micro-sponge iron (micro-Fe0@Fe2O3) achieves significantly improved removal of Cr(VI) across a broad pH range. Mechanical force eliminates the surface oxide layer and exposes the Fe0 core, leading to sustained reduction of Cr(VI). The efficiency of micro-Fe0@Fe2O3 is strongly influenced by dissolved oxygen, with higher DO resulting in the generation of stable reductant Fe(II) under acidic conditions, while DO consumption hinders the reduction of Cr(VI) under alkaline conditions due to increased pH. Parameters of ball milling operation, especially rotation speed, have a significant impact on the removal of Cr(VI).
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Alton F. Grabsch, Phillip D. Fawell, Michael G. Davies
Summary: High molecular weight partially hydrolysed polyacrylamide (PHPA) is commonly used in mineral exploration drilling to increase fluid viscosity and help maintain the suspension of fine particles. However, clarifying these suspensions can be difficult, and previous studies have found that anionic flocculants are ineffective. This study confirmed that nonionic flocculants can successfully aggregate the particles, indicating that the charged tails of adsorbed PHPA prevent anionic flocculants from accessing the particle surfaces.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
J. S. Guiral-Vega, L. Perez-Barnuevo, J. Bouchard, A. Ure, E. Poulin, C. Du Breuil
Summary: This paper introduces an approach that combines particle properties and process modeling to describe the behavior of iron ore in a laboratory-scale drum-type magnetic separator. Early information on iron ore processing behavior can be obtained through laboratory testing, automated mineralogy analysis, and process modeling.
MINERALS ENGINEERING
(2024)
Review
Engineering, Chemical
Sayed Janishar Anzoom, Ghislain Bournival, Seher Ata
Summary: This review discusses the benefits and challenges of coarse particle flotation, as well as recent developments in improving the process. Coarse particle flotation has various applications and offers advantages in technical, economic, and sustainability aspects. However, it also faces challenges such as particle detachment, transfer between phases, and persistence in the froth phase. Technological advancements, such as fluidized-bed flotation and processes enhancing bubble-particle attachment, have shown promising results in efficiently recovering larger particles.
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
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
Engineering, Chemical
Shuwei Wu, Shuai Wang, Guoqiang Wang, Longfei Fan, Jianbo Guo, Zhengbin Liu, Haoyan Zhang, Wei Guan, Yukuan Wang, Yewei Wu
Summary: This study analyzes the motion mode of eccentric roller crushers and proposes a calculation method for productivity. Through laboratory experiments, the results indicate that the proposed method can effectively estimate the productivity of eccentric roll crushers.
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
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
Genzhuang Li, Fisher Wang, Bern Klein, Michael Deal, Aaron Wright, Hector Mezquita
Summary: This paper presents a stress-based approach for predicting and improving large-scale HIG mill performance through experimental testing and model calibration.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Runpeng Liao, Shuming Wen, Jian Liu, Shaojun Bai, Qicheng Feng
Summary: This study demonstrates that the use of a DDA/DDTC mixed collector system can significantly improve the flotation performance of smithsonite. The synergistic effect between DDA and DDTC is confirmed, and the mixed collector system contributes to a decrease in solution surface tension. The use of FT-IR and XPS confirms the simultaneous physisorption and chemisorption of DDA and DDTC on the smithsonite surface, and contact angle measurements show that the mixed collector effectively enhances the hydrophobicity of smithsonite. Molecular dynamics simulations reveal the multilayer adsorption of DDTC and DDA on the smithsonite surface, with DDTC promoting the adsorption of DDA.
MINERALS ENGINEERING
(2024)
