Article
Environmental Sciences
Wenjie Lv, Qi Wei, Yujie Ji, Bing Liu, Hongpeng Ma, Yuan Huang, Haitao Huang, Hualin Wang, Pengbo Fu
Summary: Ore resources in the mining process generate a large amount of unmanageable tailings, which can cause serious pollution when released into the environment, but are also valuable resources. The conventional cyclone separation for fine particles has low recovery and utilization rates and requires performance optimization. This study proposes a new volute feed structure to enhance the classification and recovery of fine mineral particles. Through numerical simulation and experimental research, the effects of various structural and operating parameters on flow field distribution, particle motion, and classification performance are systematically examined. The results reveal that the new feed structure can effectively improve flow field stability and particle classification efficiency, leading to an increase in the classification efficiency of fine particles by 10-18%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Duanxu Hou, Lin Zhang, Baoyu Cui, Qiang Zhao, Lanyue Jiang, Peikun Liu, Dezhou Wei
Summary: The particle circulation flow and classification performance of the cylindrical hydrocyclone and multi-stage cylindrical hydrocyclone were studied using numerical simulations and physical tests. The results showed that the multi-stage cylindrical hydrocyclone can enhance the circulation flow of certain particles and limit the circulation flow of others, leading to improved classification efficiency.
Article
Engineering, Environmental
Wenjie Lv, Jinchao Zhao, Mingxun Hao, Junyi Liu, Yanhong Zhang, Jiayu Zheng, Bi Su, Yiwei Wang, Yuan Huang
Summary: This paper presents a triple hydrocyclone pre-sequencing grading system for treating waste drilling fluid, which employs a swirl particle arranger to enhance classification and recovery of barite particles. Experimental results show that the inclusion of a cylindrical arranger in front of the hydrocyclone increases the recovery rate of barite by 5.7% to 75.0%. The optimal classification performance is achieved when the arranger cone angle is 6, with a significant reduction in solid content and a high barite recovery rate. This technology enables deep removal of drilling cuttings, efficient recovery of barite, and recycling of bentonite.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Energy & Fuels
Xuebin Zhang, Youjun Tao
Summary: This study introduced Krebs hydrocyclone into the fine coal EGS process and examined its ultrafine classification effect and flow field characteristics. The results showed that Krebs hydrocyclone has excellent grading efficiency and separation performance in fine coal washing. This study provides an effective approach for the industrial application of enhanced gravity separators in the fine coal washing process.
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION
(2023)
Article
Engineering, Chemical
Caie Zhang, Shuaishuai Lu
Summary: In this study, experiments were conducted to investigate the classification performance of coal slime. It was found that the misplacement of fine particles in the underflow was mainly caused by the presence of fine gangue components. Increasing the feed concentration appropriately can reduce the adverse effect of particle density on classification. This work provides insights into the migration mechanism of multi-component particles during the classification of coal slime.
Article
Engineering, Chemical
Qiang Zhao, Baoyu Cui, Guobin Zou, Tao Song, Tianhao Yang, Junwu Zhou, Yanbai Shen
Summary: This study evaluates the performance of well-known models for hydrocyclone separation based on extensive data and introduces a new model that combines the merits of existing models and considers particle size distribution effects. The results confirm the validity of the new model and provide valuable guidance for industrial applications.
Article
Engineering, Chemical
Caie Zhang, Shuaishuai Lu
Summary: Numerical experiments were conducted to investigate the classification characteristics of magnetite ore particles in the presence of gangue minerals. The study found a significant difference in recovery for intermediate-sized particles due to density effect. Increasing feed d0.5 resulted in an increasing trend in cut size, Ep value, solid concentration, and underflow yield. The proposed density effect coefficient revealed extreme values for intermediate-sized particles. The migration mechanism of magnetite and gangue particles under different feed d0.5 and Q/M ratios was analyzed. This work provides a clear understanding of the intrinsic classification characteristic of magnetite ore particles.
Article
Metallurgy & Metallurgical Engineering
Meng Zhou, Lilla A. Farkas, Ozan Kokkilic, Raymond Langlois, Neil A. Rowson, Kristian E. Waters
Summary: Fine grinding in the mineral processing industry leads to loss of valuable metal-containing fine materials. Magnetic adsorbents are being explored as a method for processing wastewater, resulting in the need for methods to recover fine materials post adsorption. This study investigates the use of a magnetic hydrocyclone to enhance the recovery of ultrafine and fine particles from slurry.
CANADIAN METALLURGICAL QUARTERLY
(2023)
Article
Engineering, Chemical
Kevin P. Galvin
Summary: The transition from a carbon to a metals-based economy is driving an unprecedented demand for minerals, posing a challenging process engineering task due to decreasing ore grade and environmental concerns. Recent developments with the Reflux Classifier show potential for significant improvements in separation efficiency and processing speed by applying new forces to enhance selectivity.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Thermodynamics
P. Katare, A. Krupan, A. Dewasthale, A. Datar, A. S. Dalkilic
Summary: This study focuses on the industrial application of hydrocyclones for fine filtration, designing a hydrocyclone for cleaning machine filtration system and analyzing its performance efficiency through computational fluid dynamics software. Results show increasing pressure from center to wall and initial increase then decrease in velocity inside the cyclone. The study concludes with an efficiency of 76.19% for the hydrocyclone.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Engineering, Chemical
Qiang Zhao, Baoyu Cui, Yanbai Shen, Wenbao Liu, Sikai Zhao, Yuqing Feng
Summary: This study numerically investigated the motion behavior, dynamic forces, spatial distribution, and flow characteristics of particles in the axial velocity fluctuation zone (AVFZ). The results showed that the particle size mainly affected the drag force, while the particle density mainly influenced the ratio of centrifugal force to pressure gradient. The AVFZ exhibited strong turbulence dispersion, resulting in prolonged residence time and limited separation sharpness.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Energy & Fuels
Dongyang Dou, Zhaoyu Qiu, Jianguo Yang
Summary: An industrial water injection hydrocyclone was adopted in the Taixi coal preparation plant to overcome the problem of fine particle entrainment and improve grading efficiency. The parameter optimization of the hydrocyclone was conducted using a particle swarm optimization optimized support vector machine model. The study found that the maximum efficiency was achieved with a 50 mm underflow port diameter, 0.25 MPa inlet pressure, and 0.04 MPa water injection pressure.
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION
(2022)
Article
Agronomy
Peng Hou, Jaume Puig-Bargues, Yang Xiao, Tao Xue, Jinyan Wang, Peng Song, Yunkai Li
Summary: Improving centrifugal filters with volute optimized design and semi-closed inlets can significantly enhance the separation efficiency of fine sediment and reduce the head loss. The combination of these two improvements can further increase the separation efficiency while gradually increasing the head loss.
IRRIGATION SCIENCE
(2022)
Article
Engineering, Chemical
Tong Zhang, Jianping Li, Aosong Wei, Junjun Huang, Shihao Li, Jun Huan, Faquan Wang, Hualin Wang
Summary: This study proposed a method for ultra-clean separation of micro-particle contaminants using mini-hydrocyclones with overflow microchannels. By controlling the width of the overflow microchannels, the adverse effects of short-flow can be significantly reduced, leading to efficient separation. Experimental results showed that this method can greatly decrease the concentration and quantity of micro-particle contaminants in lubricating oil, achieving the cleanliness requirements of international standards and demonstrating excellent technical-economic performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaohua Huang, Yingying Lu, Guobo Wu, Zhiping Liu
Summary: The primary sewage sludge in Chongqing contains a high concentration of fine sand, which presents challenges in treatment processes. While a grit chamber is commonly used for separation, hydrocyclones show superior performance in terms of cost effectiveness and ease of operation. Through experiments, it was found that hydrocyclone FX100 was more suitable for actual operation due to its higher processing capacity and operating power compared to FX50.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
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)