Article
Engineering, Chemical
Hepeng Zhou, Zhizhao Yang, Yongbing Zhang, Wei Sun, Zhiyong Gao, Meifen Lei
Summary: The study found that Artemisia sphaerocephala Krasch. gum has a strong depression effect on calcite, but has minimal impact on the flotation of fluorite. Analyzing Zeta potential, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy confirmed the adsorption mechanism and effects of the gum on the mineral surfaces, leading to successful flotation separation in the experiments.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Jie Liu, Xun Wang, Yimin Zhu, Yuexin Han
Summary: The novel depressant DTPA was found to effectively inhibit the floatability of fluorite while minimally affecting scheelite due to its selective adsorption on fluorite surface and hindering the further adsorption of NaOL. The chemical adsorption of DTPA on the fluorite surface allows for the potential effective separation of scheelite from fluorite.
MINERALS ENGINEERING
(2022)
Article
Chemistry, Physical
Cheng Liu, Tianyu Wang, Liwei Han, Shenxu Bao, Ruan Chi, Siyuan Yang
Summary: This study investigated the feasibility of using tannin extract (TE) as a depressant to separate fluorite and calcite. Microflotation results showed that sodium oleate (NaOl) could effectively float both fluorite and calcite, but the addition of TE completely depressed the flotation of calcite while having little effect on fluorite. Various analysis techniques demonstrated that TE had stronger adsorption on calcite, weak interaction with fluorite, and formed stable chelating compounds only with calcite.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Hepeng Zhou, Zhizhao Yang, Xuekun Tang, Wei Sun, Zhiyong Gao, Xianping Luo
Summary: The research found that there are significant differences in the adsorption behavior of tamarind seed gum between fluorite and calcite, and separating the two minerals can be efficiently achieved by adding tamarind seed gum.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Xun Wang, Jie Liu, Yimin Zhu, Yanjun Li
Summary: The study successfully achieved efficient separation of cassiterite and fluorite using the eco-friendly depressant 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA). The results showed that PBTCA selectively depressed the flotation of fluorite, and further analyses revealed the adsorption mechanism of PBTCA on the mineral surfaces.
MINERALS ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Wen-jie Han, Yi-min Zhu, Wen-cheng Ge, Jie Liu, Yan-jun Li, Wen-bo Li
Summary: In this study, curdlan was used as an efficient and eco-friendly calcite depressant for flotation of fluorite/calcite. The selective depression mechanism of calcite by curdlan was investigated and it was found that curdlan selectively depressed calcite by adsorbing onto its surface through chemical bonding. This selective adsorption resulted in the modification of calcite's hydrophilicity and hindered the subsequent hydrophobic modification caused by the adsorption of sodium oleate.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Chemistry, Physical
Qingmin Nie, Tingsheng Qiu, Huashan Yan, Yonggai Li
Summary: In this study, an eco-friendly depressant polyepoxysuccinic acid (PESA) was used for the flotation separation of bastnaesite from fluorite. The results showed that PESA had a strong depression effect on fluorite while having a negligible impact on bastnaesite. The addition of PESA also impeded the adsorption of octyl hydroxamic acid (OHA) on fluorite surface, which confirmed the selective depressant effect of PESA.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Hongli Fan, Wen Tan, Guangyi Liu
Summary: The study found that bastnasite exhibited good floatability using HDDPA as a collector at pH 7.0-10.0, with efficient separation from calcite at around pH 8.0. HDDPA(3)- anions were able to replace CO32- ions on the bastnasite surface, resulting in a high flotation recovery. However, increasing OH concentration reduced the floatability of bastnasite as competition with HDDPA anions intensified.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Ruiqi Xie, Zhihui Zhao, Xun Wang, Xiong Tong, Xian Xie
Summary: This study successfully separated scheelite and fluorite using NTA as a depressant, and revealed the selective adsorption mechanism of NTA on fluorite.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Geochemistry & Geophysics
George Blankson Abaka-Wood, Bob Johnson, Jonas Addai-Mensah, William Skinner
Summary: This study aims to develop an efficient, cost-effective, and environmentally friendly processing method to extract rare earth elements (REE) from low-grade saprolite ore in Australia. The results show that using depressants and desliming techniques can improve the recovery and grade of REE, and further flotation studies may optimize the process.
Article
Engineering, Chemical
Long Wang, Weijian Lyu, Lingyun Huang, Fuping Li, Hao Zhang
Summary: In this study, gellan gum (GG) was utilized as a depressant in the flotation separation of fluorite and barite. The inhibitory impact of GG on the flotation performances of these two minerals was evaluated and the potential inhibiting mechanism of GG was systematically revealed. The results showed that GG exhibited strong depressing effect on barite flotation while it had little impact on fluorite flotation, achieving the selective separation of these two minerals.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Ruofan Sun, Dan Liu, Xiaosong Tian, Qi Zuo, Daqian Wang, Shuming Wen
Summary: This study investigated the effects and mechanisms of Cu2+ and soluble starch (SS) in the flotation separation of fluorite and calcite. The results show that the combination of Cu2+ and SS can effectively depress calcite, while the impact on fluorite flotation is relatively small. Various analyses revealed that Cu2+ can react with SS to form a Cu-SS complex, leading to differential flotation performance between fluorite and calcite.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Mei Li, Zhilong Liu, Bin Wang, Xin Teng, Hao Jiang
Summary: In this study, the flotation separation performance and mechanism of fluorite and calcite using a mixed anionic/cationic collector and salted water glass were investigated. The results showed that the mixed collectors had strong selectivity for the two minerals, while the salted water glass selectively inhibited the flotation of calcite. Analysis revealed that the mixed collectors had greater molecular activity and a synergistic effect compared to a single collector. This research provides insights into the separation of fluorite and calcite.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Wei Sun, Qianqian Lu, Zhao Wei
Summary: The flotation separation of scheelite and barite is challenging due to their similar chemical properties, but an effective separation can be achieved through the dissolution and surface transformation of fluorite. Fluorite ions play a crucial role in the separation process, affecting the surface charge of barite significantly. Surface transformation is essential for successful flotation and offers a new strategy for separating salt minerals.
MINERALS ENGINEERING
(2021)
Review
Chemistry, Physical
Zhiyong Gao, Cong Wang, Wei Sun, Yuesheng Gao, Przemyslaw B. Kowalczuk
Summary: Fluorite, as a scarce nonrenewable strategic non-metallic mineral resource, is crucial in various fields and its demand continues to grow. This review provides insight into the crystal structure, common reagents in fluorite flotation, and the synergistic effect of collectors and depressants. It also summarizes widely seen fluorite-flotation cases for separation from other minerals, offering new understanding and potential guidance for similar mineral flotation.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Chemical
Yufan Mu, Yongjun Peng
MINERALS ENGINEERING
(2019)
Article
Engineering, Chemical
Yufan Mu, Yongjun Peng
MINERALS ENGINEERING
(2019)
Article
Engineering, Chemical
Yufan Mu, Yupu Cheng, Yongjun Peng
MINERALS ENGINEERING
(2020)
Article
Metallurgy & Metallurgical Engineering
Zhao Cao, Peng Wang, Wen-bo Zhang, Xiao-bo Zeng, Yong-dan Cao
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2020)
Article
Engineering, Chemical
Pei Li, Zhao Cao, Ruichao Zhao, Gang Li, Mao Yu, Shiqi Zhang
ADVANCED POWDER TECHNOLOGY
(2020)
Article
Engineering, Chemical
Yufan Mu, Yupu Cheng, Yongjun Peng
MINERALS ENGINEERING
(2020)
Article
Metallurgy & Metallurgical Engineering
Jieliang Wang, Peng Zu, Shiwen Yi, Zhao Cao
Summary: Bayan Obo ore contains high levels of rare earth and fluorite, making it difficult to efficiently separate using conventional magnetic separation and flotation. A stepwise magnetic separation process can achieve high-purity preconcentrates, improving efficiency for subsequent flotation separation.
MINING METALLURGY & EXPLORATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Yufan Mu, Yongjun Peng
Summary: In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0, successfully deactivating pyrite. Additionally, the type of grinding media used was found to have a significant impact on the depression role of MBS in pyrite flotation.
MINING METALLURGY & EXPLORATION
(2021)
Article
Chemistry, Applied
Zhao Cao, Zeyu Cheng, Jieliang Wang, Yongdan Cao
Summary: This study investigates the effect of Ca2+ ions and sodium silicate individually or in combination on bastnaesite flotation. The results show that the combination of Ca2+ ions and sodium silicate more severely depresses bastnaesite due to their synergistic effect.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Applied
Zhao Cao, Xu Wu, Sultan Ahmed Khoso, Wenbo Zhang, Yuling Liu, Mengjie Tian, Jieliang Wang
Summary: This study demonstrates the high adsorption and recovery rate of nonane-1,1-bisphosphonic acid (C9-BPA) as a collector in monazite flotation, showing better performance compared to the traditional collector sodium oleate (NaOL).
JOURNAL OF RARE EARTHS
(2022)
Article
Materials Science, Multidisciplinary
Wence Xu, Kexuan Shen, Zhao Cao, Fang Liu, Yuxuan Zhang, Tiezhu Zhang, Nannan Wu, Shunli Ouyang
Summary: The study focuses on the production of slag glass-ceramics using Bayan Obo tailings and explores the effect of the preparation process on the stable behavior and crystallization mechanism. Results show that high crystallization temperature enhances the mechanical properties of the glass-ceramics.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Chemical
Xiaoxia Yang, Yufan Mu, Yongjun Peng
Summary: Copper ions and lead ions show different activation effects on pyrite with different degrees of oxidation, with lead ions performing better in activating severely oxidized pyrite, while copper ions being more effective in moderately oxidized pyrite. The difference in behavior is attributed to the species adsorbed on the pyrite surface.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Physical
Jieliang Wang, Zeyu Cheng, Yiwen Hu, Yongdan Cao, Peng Wang, Zhao Cao
Summary: This study compared the effect of sodium silicate on the flotation of bastnaesite and parisite, indicating that the inhibition effect of sodium silicate on parisite was significantly stronger than that on bastnaesite. Sodium silicate hindered the adsorption of hydroxamate collector on parisite surface, leading to heavy inhibition on parisite flotation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Xiaoxia Yang, Yufan Mu, Yongjun Peng
Summary: Lead ions can counteract the negative effects of free cyanide on pyrite flotation in alkaline conditions and significantly activate pyrite flotation. The adsorption of lead ions on pyrite surface counteracts the depression of free cyanide by covering lead species on top of iron cyanide and thiocyanate, but the preference for adsorption on thiocyanate limits the ability of lead ions to counteract free cyanide.
MINERALS 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)
