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)
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
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
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
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)
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
Zahra Ghasemi, Frank Neumann, Max Zanin, John Karageorgos, Lei Chen
Summary: The mining industry has a large amount of stored production data, but the potential of these datasets in process modelling is yet to be fully explored. This research aims to find the most accurate prediction model for SAG mill throughput by comparing six machine learning models. The results show that the recurrent neural network is the most accurate model, followed by genetic programming and support vector regression. Sensitivity analysis reveals that turning speed and inlet water are the most significant factors affecting SAG mill throughput.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Luyi Xu, Dan Liu, Runfan Sun, Yijie Wang, Zhipeng Liu, Ping Shao, Chunjing Wang, Shuming Wen
Summary: This study investigated the effect of soluble starch (SS) as a depressant on the flotation separation of smithsonite and calcite. The results showed that soluble starch can effectively reduce the floatability of calcite by forming different chemical bonds during the interaction with mineral surfaces, resulting in differences in adsorption energies and flotation recovery rates.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Rodrigo M. de Carvalho, Thales S. M. Gama, Bruno P. da Silva, Luis Marcelo Tavares
Summary: This study utilizes modeling and simulation techniques to predict the response of a rod milling circuit in long-term operation. The results show that increasing the rod charge and diameter, coupled with initially operating at lower speed and replacing worn rods during the midlife of the charge, can significantly improve the rod charge lifetime, reduce variability in product quality, and decrease the cost of coke breeze production per ton.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
L. D. Jasso-Recio, J. C. Fuentes-Aceituno, R. Perez-Garibay
Summary: This study presents an electrochemical investigation of the electro-assisted reduction of chalcopyrite using an organic weak acid for the first time. The experimental results reveal that increasing the concentration of acetic acid promotes the reduction of chalcopyrite, resulting in the release of a higher quantity of chalcopyritic iron. It is also found that the rate determining step of the reduction reaction involves the formation of monoatomic hydrogen from undissociated acetic acid molecules.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Alban Duvernois, Mathieu Villeneuve, Isabelle Demers, Li Zhen Cheng, Carmen Mihaela Neculita
Summary: Environmental assessment is commonly conducted during the advanced development stage of a mining project, and this study proposes a preliminary method using non-destructive and portable tools for early assessment. The methodology was validated and applied to two mining projects, providing comparable results to traditional testing methods and enabling the classification of preliminary geo-environmental domains.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Moonchul Jung, Bogale Tadesse, Craig Dick, Alex Logan, Laurence Dyer, Boris Albijanic
Summary: Using saline water in mineral processing plants can improve water efficiency, but the dissolved ions in the water such as Ca2+ and Mg2+ can negatively affect the flotation of rare earth (RE) minerals. This study investigated the impact of divalent cations like Ca2+ and Mg2+ on RE mineral flotation, finding that they decreased selectivity and recovery of RE minerals while increasing the recovery of iron oxide minerals.
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)
Article
Engineering, Chemical
Edwin J. Y. Koh, Eiman Amini, Carlos A. Spier, Geoffrey J. McLachlan, Weiguo Xie, Nick Beaton
Summary: This study investigates a technique using deep learning machine vision and optical microscopy for in-pulp characterization of mineralogy and particle size distribution for multiple minerals in a copper ore pulp. The technique can predict the particle size and mineralogy for chalcopyrite, quartz, and other sulfides in-pulp within 5 minutes.
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
Luciano Bernardo Jose, Gabriela Cordeiro Silva, Ana Claudia Queiroz Ladeira
Summary: This study evaluated the pre-concentration and fractionation of rare earth elements (REE) from acid mine drainage using ion exchange technique. The results showed that the ion exchange resin exhibited higher selectivity for La, Ce, Pr and Nd during the loading step, while 0.01mol L-1 NH4EDTA achieved better elution profiles during the fractionation step.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yesica L. Botero, Luis A. Cisternas, Isabelle Demers, Mostafa Benzaazoua
Summary: Flotation is a widely used mineral concentration technology, but there is limited research on flotation circuit designs for polymetallic ores. Sulfide mineral flotation tailings can generate acid mine drainage, highlighting the need for tailings without sulfur species. This paper investigates different circuit designs for polymetallic ores, considering factors such as stage recovery uncertainty, costs, energy use, and environmental impacts. The results suggest that holistic design approaches can lead to more efficient designs and that traditional processing methods have higher energy, water, and material consumption, resulting in greater environmental impact.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
C. Garner, J. Strongman, B. Staniforth, J. Fletcher, C. Brough
Summary: The use of automated mineralogy is crucial in all stages of a mine cycle, but the quality and automation of the process depend on the accuracy and efficiency of sample preparation. Poor sample preparation can lead to lower quality automated mineralogy data outputs, highlighting the need for optimization in this stage.
MINERALS ENGINEERING
(2024)
