Minerals Engineering最新文献_第3页

Acid-Free Cu(I) activator for Selective pyrrhotite Flotation: Interfacial activation pathway and mechanistic insights 无酸铜(I)活化剂选择性磁黄铁矿浮选：界面活化途径和机理的见解

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-25 DOI: 10.1016/j.mineng.2026.110113

Yiqi Cui , Chuyu Yang , Ke Zhou , Jing Wang , Xiao Wang , Zhentao Yuan

{"title":"Acid-Free Cu(I) activator for Selective pyrrhotite Flotation: Interfacial activation pathway and mechanistic insights","authors":"Yiqi Cui , Chuyu Yang , Ke Zhou , Jing Wang , Xiao Wang , Zhentao Yuan","doi":"10.1016/j.mineng.2026.110113","DOIUrl":"10.1016/j.mineng.2026.110113","url":null,"abstract":"<div><div>Tin ores in southwestern China are complex polymetallic deposits containing copper, tin, and iron, with abundant pyrrhotite that is difficult to separate from cassiterite, resulting in low desulfurization efficiency. To address the high operational cost, excessive reagent consumption, and environmental risks of conventional CuSO<sub>4</sub> activators, an acid-free Cu(I)-based desulfurization activator named SY-1 was developed. SY-1 increased pyrrhotite recovery to approximately 90 % at 0.4 × 10<sup>–4</sup> mol·L<sup>−1</sup> and remained effective across a wide pH range of 2–12. Compared with CuSO<sub>4</sub>, SY-1 induced a stronger negative shift in zeta potential, enabling higher BX anion adsorption and superior activation efficiency. Furthermore, surface characterization confirmed that activation increased the Cu(I) content and S<sup>2-</sup>/S<sub>2</sub><sup>2-</sup> ratio of pyrrhotite, thereby exposing additional active sites. In addition, quantum chemical calculations and AIMD simulations showed that Cu(I) adsorbs strongly on pyrrhotite and creates additional BX anion adsorption sites, thereby avoiding the multi-step electron-transfer pathway of Cu (II) and enabling efficient, low-dosage flotation. Taken together, this study presents a green and highly efficient desulfurization activator, offering a sustainable strategy for processing complex polymetallic tin ores.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110113"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of polyamino polyether methylene phosphonic acid as an eco-friendly depressant in the separation of apatite and dolomite 聚氨基聚醚亚甲基膦酸在磷灰石和白云石分离中的环保型抑制剂评价

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-02-01 DOI: 10.1016/j.mineng.2026.110122

Yuhua Zhu , Cheng Liu , Hongyang Wang , Wei Xu , Siyuan Yang

{"title":"Evaluation of polyamino polyether methylene phosphonic acid as an eco-friendly depressant in the separation of apatite and dolomite","authors":"Yuhua Zhu , Cheng Liu , Hongyang Wang , Wei Xu , Siyuan Yang","doi":"10.1016/j.mineng.2026.110122","DOIUrl":"10.1016/j.mineng.2026.110122","url":null,"abstract":"<div><div>Flotation separation of apatite from dolomite is still a challenge due to their similar surface characteristics. To address this issue, polyamino polyether methylene phosphonic acid (PAPEMP) was employed to separate apatite and dolomite. The single-mineral flotation results showed that PAPEMP selectively depressed the floatability of dolomite using the sodium oleate (NaOl) collector. The artificial mixed mineral and real flotation tests confirmed that separation between apatite and dolomite could be realized in the reagent scheme of PAPEMP/NaOl. The adsorption tests indicated that the adsorption of PAPEMP on the dolomite surface was much greater than that on the apatite surface. The zeta potential and Fourier Transform Infrared Spectroscopy (FTIR) experiments verified that the interaction between dolomite and PAPEMP was stronger than that between apatite and PAPEMP, then selectively hindered the interaction of NaOl with the dolomite surface. The XPS results indicated that phosphate groups in the PAPEMP molecule interact with calcium/magnesium ions on the dolomite surface, while no effective chemical interaction occurred between PAPEMP and the apatite surface. MS calculation results further confirmed that the interaction between PAPEMP and the dolomite surface was stronger than that between PAPEMP and the apatite surface. Therefore, PAPEMP could be used as an appropriate depressant to separate apatite and dolomite.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110122"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review of particle separation technologies for lunar in-situ resource utilization 月球原位资源利用中的颗粒分离技术综述

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-21 DOI: 10.1016/j.mineng.2026.110099

Ruoxi Zhao, Haifeng Wang, Chenlong Duan, Liang Dong, Juan Hao, Chenmin Liu

{"title":"A review of particle separation technologies for lunar in-situ resource utilization","authors":"Ruoxi Zhao, Haifeng Wang, Chenlong Duan, Liang Dong, Juan Hao, Chenmin Liu","doi":"10.1016/j.mineng.2026.110099","DOIUrl":"10.1016/j.mineng.2026.110099","url":null,"abstract":"<div><div>Particle separation technology plays a pivotal role in resource extraction and processing, particularly for lunar in-situ resource utilization. This paper comprehensively reviews recent advances in particle separation methods suitable for the lunar environment, with special emphasis on screening, magnetic separation, and electrostatic separation techniques for regolith processing. Research demonstrates that dry separation technologies have emerged as the preferred approach for lunar regolith beneficiation due to their low energy consumption, lightweight equipment requirements, and water-free operation − critical advantages in the Moon’s unique reduced-gravity, high-vacuum, and extreme temperature conditions. Through comparative analysis of existing technologies, this study examines the feasibility of integrated separation systems and identifies future development directions focusing on technological optimization and multi-process integration. The continuous improvement of separation efficiency and the development of hybrid solutions will provide essential resource support for lunar base construction and deep space exploration missions, while also advancing space resource utilization technologies. Notably, the innovations derived from lunar applications may offer valuable insights for particle separation in terrestrial extreme environments.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110099"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbothermal synthesis of quartz-supported S-nZVI from limonite and pyrite for enhanced organic pollutant degradation 褐铁矿和黄铁矿碳热合成石英负载S-nZVI增强有机污染物降解

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-29 DOI: 10.1016/j.mineng.2026.110111

Jiangan Chen , Ting Liao , Meian Wang , Mingxing Cheng , Danliang Zeng , Zuocheng Yuan , Wen Yu , Ying Ye , Wenjie Zhang , Qiongyao Tang , Chengdu Qi

{"title":"Carbothermal synthesis of quartz-supported S-nZVI from limonite and pyrite for enhanced organic pollutant degradation","authors":"Jiangan Chen , Ting Liao , Meian Wang , Mingxing Cheng , Danliang Zeng , Zuocheng Yuan , Wen Yu , Ying Ye , Wenjie Zhang , Qiongyao Tang , Chengdu Qi","doi":"10.1016/j.mineng.2026.110111","DOIUrl":"10.1016/j.mineng.2026.110111","url":null,"abstract":"<div><div>Sulfidized nano zero-valent iron (S-nZVI) is an exceptional wastewater treatment material, but its excessively high preparation costs severely restrict its industrial applications. In this study, a carbothermal reduction method was developed to prepare quartz-supported S-nZVI (SiO<sub>2</sub>@S-nZVI) from limonite ore and pyrite. The preparation conditions, characteristics, preparation mechanism of SiO<sub>2</sub>@S-nZVI, and its performance in removing organic contaminants were investigated. Batch experiments revealed that SiO<sub>2</sub>@S-nZVI prepared under the conditions of an FeS<sub>2</sub> dosage of 6% and a roasting temperature of 1000 ℃ with a S/Fe molar ratio of 0.125 and an iron metallization rate of 91.76% exhibited the best performance for removing methyl orange. Core-shell structure S-nZVI was successfully synthesized on SiO<sub>2</sub> surfaces in the SiO<sub>2</sub>@S-nZVI, where ZVI derived from iron mineral reduction reacted with S<sub>2</sub> released by pyrite decomposition during carbothermal reduction process. The incorporation of S into both the surface and the bulk of ZVI accelerates electron transfer, while the carrier SiO<sub>2</sub> inhibits the aggregation of S-nZVI, thereby significantly enhancing the material’s pollutant removal performance. The degradation kinetics of organic contaminants were studied under various conditions, and the results showed that SiO<sub>2</sub>@S-nZVI can degrade methyl orange, acid orange G, methylene blue, and p-nitrophenol efficiently. The degradation mechanism analysis reveals that a redox reaction occurs between SiO<sub>2</sub>@S-nZVI and methyl orange, leading to the cleavage of the azo double bond in methyl orange and its subsequent degradation and mineralization. These findings offer a cost-effective method for the preparation of highly reactive S-nZVI.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110111"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing gravity separation of low-grade ilmenites by surface flash passivation against ultrafine aluminosilicate coating 超细硅酸铝涂层表面闪蒸钝化提高低品位钛铁矿重选效果

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-20 DOI: 10.1016/j.mineng.2026.110090

M. Tang, J. Luo

{"title":"Enhancing gravity separation of low-grade ilmenites by surface flash passivation against ultrafine aluminosilicate coating","authors":"M. Tang, J. Luo","doi":"10.1016/j.mineng.2026.110090","DOIUrl":"10.1016/j.mineng.2026.110090","url":null,"abstract":"<div><div>Iron ore tailings often contain valuable titanium minerals, yet recovering finely liberated ilmenite remains a challenge for gravity separation. This study aims to identify the factors hindering the beneficiation of a low-grade ilmenite ore with alumina-silicate gangues using Vibrated Cone Separation (VCS) as an EGS technique and explores potential mitigation strategies. A series of gravity separation tests, coupled with scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS) observations, were conducted to determine the factors influencing the selective separation of ilmenite particles. The results show that ultrafine aluminosilicates strongly adhere to the surfaces of free ilmenite particles, diluting the TiO<sub>2</sub> concentrate grade. Attritioning this material by high-speed agitation was not effective in removing the coating of the ultrafine gangues. However, flash surface passivation by adding oxalic acid directly into the grinding process significantly decreased these non-selective particle aggregates, resulting in cleaner surfaces and a 6% increase in TiO<sub>2</sub> content.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110090"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and characterization of a novel multi-component dust suppressant suitable for dust control in tailings pond 一种适用于尾矿库粉尘治理的新型多组分抑尘剂的制备与表征

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-21 DOI: 10.1016/j.mineng.2026.110080

Xiaochuan Xu , Chao Li , Yajun Dong , Xiaowei Gu , Yunqi Zhao , Zhiyuan Wu , Yuxiang Zhong , Depei Lu

{"title":"Preparation and characterization of a novel multi-component dust suppressant suitable for dust control in tailings pond","authors":"Xiaochuan Xu , Chao Li , Yajun Dong , Xiaowei Gu , Yunqi Zhao , Zhiyuan Wu , Yuxiang Zhong , Depei Lu","doi":"10.1016/j.mineng.2026.110080","DOIUrl":"10.1016/j.mineng.2026.110080","url":null,"abstract":"<div><div>Dust emissions from tailings ponds threaten worker health and nearby ecosystems. A multi-component dust suppressant (MCDS) composed of glycerol (GLY), sodium carboxymethyl cellulose (CMC-Na), and polyacrylamide (PAM) was optimized by response-surface methodology with viscosity and surface tension as dual objectives. The optimal ratio of MCDS is 23.62 % GLY, 2.28 % CMC-Na, and 0.3 % PAM, it exhibited a viscosity of 38.1 mPa·s and a surface tension of 58.1 mN/m, the penetration depth of dust reaches 11 cm in 130 min, produced a 6° contact angle on iron tailings, retained water for 5 h at 45 °C, and achieved 96.5 % dust-suppression efficiency at a wind speed of 15 m/s. These indicators indicate that MCDS exhibits satisfactory wettability, permeability, evaporation resistance, and wind erosion resistance under the tested laboratory surrogate conditions, including 45 °C and a maximum wind speed of 15 m/s. Multiscale characterization (FT-IR, SEM, TG–DSC–DTG) combined with molecular dynamics (MD) elucidated the mechanism: MD resolved an 21.8 Å adsorbed interfacial layer, a pronounced reduction of the interfacial water diffusion coefficient to 0.1265, and enhanced interfacial binding energy, supporting a synergy of hydrogen bonding, electrostatic attraction, and polymer-network formation that stabilizes the surface crust and retains moisture.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110080"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption mechanisms and weathered surface effects in the neutral flotation separation of feldspar from quartz using a mixed anionic/cationic system 阴离子/阳离子混合体系中长石与石英中性浮选分离的吸附机理及风化面效应

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-20 DOI: 10.1016/j.mineng.2026.110081

Yuhao He , Yuhan Song , Xiaohui Li , Ge Zhu , Lu Xiang , Zijie Ren

{"title":"Adsorption mechanisms and weathered surface effects in the neutral flotation separation of feldspar from quartz using a mixed anionic/cationic system","authors":"Yuhao He , Yuhan Song , Xiaohui Li , Ge Zhu , Lu Xiang , Zijie Ren","doi":"10.1016/j.mineng.2026.110081","DOIUrl":"10.1016/j.mineng.2026.110081","url":null,"abstract":"<div><div>The flotation separation of quartz and feldspar under neutral conditions present a significant challenge in mineral processing. This study systematically investigates a novel mixed anionic/cationic collector system for this separation, optimizing key parameters including collector types [sodium petroleum sulfonate (SPS) with varying active matter content; dodecylamine (DDA), octadecylamine (ODA), cocoalkylamine (CCA)], ratio (2:1 anionic-to-cationic), dosage (300 g/t), and the dosage of the depressant sodium hexametaphosphate (SHMP). This optimal reagent scheme yields a high Al<sub>2</sub>O<sub>3</sub> recovery of 81.10 % in the froth product of the mixed pure minerals, and the Al<sub>2</sub>O<sub>3</sub> recovery in the actual minerals were 77.45 % and 70.68 % respectively. Key findings indicate that a high-active-matter SPS combined with DDA yielded optimal performance. Mechanistic studies via FTIR and zeta potential analysis revealed distinct adsorption mechanisms: a weak, physically adsorbed layer on quartz that was readily desorbed by Sodium hexametaphosphate (SHMP), versus a stable, multi-mechanism complex (involving physical adsorption, hydrogen bonding, and chemisorption) on feldspar. Furthermore, SHMP hydrolysis species (H<sub>2</sub>PO<sub>4</sub>−/HPO<sub>4</sub><sup>2</sup>−) under neutral conditions compete with SPS on mineral surfaces, selectively depressing quartz at low dosages. Notably, the flotation behavior was profoundly influenced by the degree of feldspar weathering, as confirmed by SEM-EDS and XPS. Highly weathered feldspar exhibits a unique and inverse flotation behavior, characterized by the enrichment of Al<sub>2</sub>O<sub>3</sub> in the sink product rather than the froth product. This work provides a practical and environmentally friendly strategy for quartz-feldspar separation and offers deep insights into the surface chemistry involved.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110081"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Targeted enrichment of associated silver minerals in lead–zinc sulfide ores: Reagent design guided by coordination chemistry principles 铅锌硫化矿伴生银矿物的定向富集：配位化学原理指导下的试剂设计

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-28 DOI: 10.1016/j.mineng.2026.110101

Hongliang Zhang , Heng Yu , Xin Rao , Wei Sun , Chenyang Zhang

{"title":"Targeted enrichment of associated silver minerals in lead–zinc sulfide ores: Reagent design guided by coordination chemistry principles","authors":"Hongliang Zhang , Heng Yu , Xin Rao , Wei Sun , Chenyang Zhang","doi":"10.1016/j.mineng.2026.110101","DOIUrl":"10.1016/j.mineng.2026.110101","url":null,"abstract":"<div><div>Silver, commonly associated with lead–zinc sulfide ores, varies greatly in its counting coefficient in lead and zinc concentrates, typically being 0.85 and 0.20, respectively. Therefore, targeted enrichment of silver into lead concentrates can offer fatter economic benefits. To achieve this objective, the design of silver-friendly collectors is required. Herein, a targeted reagent design strategy for the lead-silver simultaneous enrichment was presented based on the coordination chemistry principles. The principal finding is that monothiophosphate and dithiophosphate—identified through systematic screening of thiosulfate, thiosulfonate, monothiophosphate, and dithiophosphate as candidate mineralophilic functional groups—exhibit superior performance for the selective recovery of galena and silver. The hydrophobic alkyl chain design reveals that the solvation free energy increases with chain elongation, and branched chains exhibit stronger hydrophobicity than straight ones. The rationally designed reagents, di-isobutyl monothiophosphate (DIBMTP) and di-isobutyl dithiophosphate (DIBDTP), possess large HOMO-LUMO energy gaps, effectively preventing them from self-reacting to form dimers, in marked contrast to xanthates that readily form dixanthogens under similar conditions. Notably, DIBMTP and DIBDTP exhibit distinct interfacial coordination mechanisms with galena and silver minerals. Specifically, the coordination bonding with galena involves conventional orbital bonding, while that with argentite and elemental silver features orbital backbonding interactions, albeit differing in electron contributions between the Ag<sup>+</sup> of argentite and Ag<sup>0</sup> of elemental silver.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110101"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Air-induced segregation of micron-scale particles in a vertical roller mill 垂直辊磨机中微米级颗粒的气致偏析

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-30 DOI: 10.1016/j.mineng.2026.110114

Yuntao Zhu , Zhong Luo , Haobin Wang , Qirun Zhou , Zhen Zhang

{"title":"Air-induced segregation of micron-scale particles in a vertical roller mill","authors":"Yuntao Zhu , Zhong Luo , Haobin Wang , Qirun Zhou , Zhen Zhang","doi":"10.1016/j.mineng.2026.110114","DOIUrl":"10.1016/j.mineng.2026.110114","url":null,"abstract":"<div><div>Particle behavior directly influences the classification performance of vertical roller mills (VRMs), but limited understanding hinders structural optimization. This study employs the CFD–DEM method to investigate the flow characteristics and segregation behavior of particles with different densities under air induction, and innovatively proposes “VRM bend pipe model” hypothesis to explain particle retention and roping phenomena. Results show that dual-inlet confluence generates a dual-spiral flow field, creating strong and weak airflow zones and subsequent cyclic, periodically segregated particle flows. High-density particles exhibit time lag and larger turning radius. The segregation index along the stationary blades shows a “digit-3” axial distribution, with a <em>DI</em> = 0 fixed point that tends to rise. Local analysis reveals that deflector in the air ring promotes outer-side particle accumulation, forming stagnant “dead zone”, while high-density particles form an annular distribution at the millstone center, and a transport mechanism exists wherein particles migrate downward along the millstone wall against the airflow. In the stationary blade zone, low-density particles form continuous streams, whereas high-density ones exhibit intermittent flow with more severe local segregation. In the upper shell zone, particles undergo coupled segregation governed by both density differences and flow-field induction. This study deepens the understanding of gas–solid flow and particle separation mechanisms in VRMs, providing theoretical support for design optimization.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110114"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization and mechanism study of phosphorus and rare earth elements separation from phosphate ore by two-step leaching process 两步浸出法分离磷矿中磷和稀土元素的优化及机理研究

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-05-01 Epub Date: 2026-01-28 DOI: 10.1016/j.mineng.2026.110116

Yue Ma, Junhu Wu, Yanru Jin, Yue Lan, Lin Yang

{"title":"Optimization and mechanism study of phosphorus and rare earth elements separation from phosphate ore by two-step leaching process","authors":"Yue Ma, Junhu Wu, Yanru Jin, Yue Lan, Lin Yang","doi":"10.1016/j.mineng.2026.110116","DOIUrl":"10.1016/j.mineng.2026.110116","url":null,"abstract":"<div><div>Phosphorus ore containing rare earth elements is a valuable strategic resource, but its industrialization remains challenging due to cost constraints. This study utilized phosphate ore containing 911.2 ppm rare earth elements and 30.3 % P<sub>2</sub>O<sub>5</sub> as raw material. By employing response surface methodology to optimize the two-step leaching process using phosphoric acid and sulfuric acid, demonstrating high efficiency in extracting rare earth elements and phosphorus while leveraging existing phosphate chemical industries to reduce costs. With a liquid-to-solid ratio of 7, a leaching temperature of 45 °C, a sulfuric acid addition time of 2 h, and a sulfuric acid excess coefficient of 0.8, the leaching efficiency for rare earth and phosphorus elements was 93.33 % and 91.89 %, respectively. Through thermodynamic analysis and in situ characterization, we thoroughly investigated the leaching process to elucidate the leaching mechanism. This study proposes a novel technology for the simultaneous recovery of rare earths and phosphorus, which holds significant strategic importance for the sustainable development of the rare earth and phosphorus chemical industries.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"239 ","pages":"Article 110116"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0