Minerals Engineering最新文献_第6页

Recovery of rare earth elements using phosphorylated yeast: A practical application from mineral ion-rich Tsukahara hot spring water 利用磷酸化酵母回收稀土元素：从富含矿物离子的土原温泉水中提取稀土元素的实际应用

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-09 DOI: 10.1016/j.mineng.2026.110061

Maya Kihara, Moena Amano, Yoshihiro Ojima, Koichi Igarashi, Masayuki Azuma

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The role of mineralogy study in the desulfurization flotation of vanadium-titanium magnetite 矿物学研究在钒钛磁铁矿脱硫浮选中的作用

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.mineng.2025.110045

Xinran Li , Hao Jiang , Yanhong Wang , Guangyi Liu , Fulin Chen , Ning Wu

{"title":"The role of mineralogy study in the desulfurization flotation of vanadium-titanium magnetite","authors":"Xinran Li , Hao Jiang , Yanhong Wang , Guangyi Liu , Fulin Chen , Ning Wu","doi":"10.1016/j.mineng.2025.110045","DOIUrl":"10.1016/j.mineng.2025.110045","url":null,"abstract":"<div><div>Vanadium-titanium magnetite is a paragenetic ore primarily composed of iron (Fe), vanadium (V), and titanium (Ti). In typical beneficiation processes, magnetite is first separated from vanadium–titanium magnetite through a combination of magnetic and gravity separation methods. The remaining ilmenite tailings are subsequently subjected to desulfurization and Ti enrichment treatments. In this study, the mineralogical characteristics of vanadium–titanium magnetite were first analyzed for desulfurization flotation. The primary useful metallic minerals in this ore were ilmenite and magnetite, along with minor amounts of sulfur-bearing minerals. Of that, approximately 98 % of the sulfur (S) existed as sulfides, predominantly pyrrhotite. Notably, 81.59 % of pyrrhotite particles achieved a liberation degree exceeding 80 % at a particle size less than 0.075 mm. Combined with the mineral dissociation analysis of pyrrhotite, a grinding particle size test was conducted at a −0.075 mm proportion of about 80 %, determining the optimal grinding particle size to be 85 % of −0.075 mm. Under the optimal desulfurization flotation conditions with a grinding particle size of 85 % less than 0.075 mm, a copper sulfate (CuSO<sub>4</sub>) dosage of 300 g/t, and a pulp pH of 4, a desulfurization of 91.33 % was achieved, and the S grade in the tailings was only 0.05 %. The difficulty in floating the remaining sulfides was due to their fine embedded size, close associative relationships, and low liberation, as determined by a process mineralogical study of the tailings. A process mineralogy of this vanadium-titanium magnetite, conducted both before and after desulfurization, provides a foundation basis for efficient desulfurization and separation.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110045"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940746","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}

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Synergistic adsorption mechanism of the combined PAX/cupferron collector on chrysocolla: surface hydrophobicity and flotation performance PAX/铜铁复合捕收剂对黄铜矿的协同吸附机理：表面疏水性和浮选性能

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.mineng.2025.110054

Hao Zeng , Qian Zhang , Yubin Sun , Youzhen Nie , Qicheng Feng

{"title":"Synergistic adsorption mechanism of the combined PAX/cupferron collector on chrysocolla: surface hydrophobicity and flotation performance","authors":"Hao Zeng , Qian Zhang , Yubin Sun , Youzhen Nie , Qicheng Feng","doi":"10.1016/j.mineng.2025.110054","DOIUrl":"10.1016/j.mineng.2025.110054","url":null,"abstract":"<div><div>Chrysocolla, a complex hydrophilic copper silicate mineral, presents significant challenges in mineral processing due to its refractory flotation behavior. Conventional sulfidization-xanthate flotation proves inefficient for chrysocolla recovery. Although combined collectors markedly enhance the floatability of oxide copper minerals, their synergistic adsorption mechanisms remain unclear. This study investigated the effects of the combined collector potassium amyl xanthate (PAX) and cupferron on chrysocolla floatability and its adsorption mechanism via flotation tests, X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FT-IR), Zeta potential, contact angle measurements, and adsorption tests. Flotation results demonstrate that the combined collector significantly improves chrysocolla recovery (83.33%) compared to the single collector systems. Mechanistic analyses reveal that PAX and cupferron co-adsorb synergistically on sulfidized chrysocolla surfaces. PAX is mainly chemisorbed on Cu(I) sites of the sulfidized chrysocolla surface, while cupferron preferentially chelates with Cu(II) sites on unstably sulfidized and unsulfidized chrysocolla surfaces, resulting in their interlaced and overlapping co-adsorption. Besides, the adsorption of PAX and cupferron is enhanced in the combined system, which improves the thickness, density, and stability of the adsorbed layer of the combined collector, thereby strengthening the surface hydrophobicity and floatability of chrysocolla.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110054"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940750","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}

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From molecular adsorption to process design: selective flotation of bastnaesite and monazite with phthalic acid as collector 从分子吸附到工艺设计：以邻苯二甲酸为捕收剂选择性浮选氟碳铈矿和独居石

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-12 DOI: 10.1016/j.mineng.2026.110063

Maoyuan Wang , Wenbo Li , Yuexin Han , Xiaolong Zhang , Shumin Zhang

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Enhancement of the analytical capabilities in on-line XRF analysis of multi-element ores 提高多元素矿石在线XRF分析能力

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.mineng.2025.110055

Pavels Kapitulskis, Ulises Miranda Ordóñez, Aleksander Sokolov

{"title":"Enhancement of the analytical capabilities in on-line XRF analysis of multi-element ores","authors":"Pavels Kapitulskis, Ulises Miranda Ordóñez, Aleksander Sokolov","doi":"10.1016/j.mineng.2025.110055","DOIUrl":"10.1016/j.mineng.2025.110055","url":null,"abstract":"<div><div>We propose the use of a simple method of compensation for matrix effects for the calculation of low element concentrations in the presence of elements with high concentrations. The method is based on Compton radiation scattering, with due account for selective absorption of low-energy photons by elements of the sample. This method can be used in the on-line XRF analysis of multi-element ores.</div><div>When applying the proposed method for the quantitative determination of Co and Cu in ore, it provided a measurement deviation of no more than 15% in the concentration range of 0.06 – 0.18% for Co and 1.56 – 3.24% for Cu. With the selected measurement time <em>T</em> = 180 s, detection limits for Co and Cu were 0.022% and 0.025%, respectively. Their quantification limits were 0.065% and 0.074%, respectively.</div><div>For on-line XRF analysis of rare-earth ores, our experiments with thin samples (1–2 mm) have shown that the detection limit for REE can reach values of a few ppm. The limit of quantification for them is less than 50 ppm. This level of analytical capabilities greatly expands the use of the on-line XRF method for the analysis of multi-element ores with rare-earth elements.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110055"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940747","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}

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Enhanced leaching process and mechanism of phosphorus-potassium associated ore with hydroxy-containing compounds: experimental study and DFT simulation 含羟基化合物强化磷钾伴生矿浸出过程及机理：实验研究与DFT模拟

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-07 DOI: 10.1016/j.mineng.2026.110057

Jiayu Ma , Pan Miao , Yuetao Gu , Junfeng Zhou , Yuan Tang , Dongsheng He

{"title":"Enhanced leaching process and mechanism of phosphorus-potassium associated ore with hydroxy-containing compounds: experimental study and DFT simulation","authors":"Jiayu Ma , Pan Miao , Yuetao Gu , Junfeng Zhou , Yuan Tang , Dongsheng He","doi":"10.1016/j.mineng.2026.110057","DOIUrl":"10.1016/j.mineng.2026.110057","url":null,"abstract":"<div><div>Extracting soluble potassium from insoluble potassium salt deposits such as phosphorus-potassium associated deposits (mine waste) is particularly important for China, which has a large demand for potassium fertilizers but is severely lacking in soluble potassium resources. Due to the presence of structurally stable potassium feldspar in the ore, how to enhance its decomposition process is a current technical challenge to be solved. This study investigated the enhanced leaching of phosphorus-potassium associated ore in the HCl-CaF<sub>2</sub> system using hydroxy-containing compounds, including small molecular weight alcohols such as lauryl alcohol, 1,4-butanediol, glycerol, and polyether polyesters with varying molecular weights and functional groups. Results showed that all the hydroxy-containing compounds have better strengthening effects, among which lauryl alcohol has the best effect, and the potassium leaching efficiency increased by 8.3 %. The mechanisms for these improvements were elucidated: hydroxy-containing compounds accelerated sedimentation and filtration rates, reducing solid–liquid separation time; decreased the surface tension and adhesion work in leachate, promoting wetting and permeation; increased the specific surface area of the filter residue, facilitating SiO<sub>2</sub> separation and advancing the acid leaching reaction. DFT (density functional theory) simulations indicate that the addition of hydroxy-containing compounds enhances the adsorption strength of H<sub>3</sub>O<sup>+</sup> on mineral surfaces. This proves highly advantageous for the progression of acid leaching reactions, thereby significantly improving potassium extraction.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110057"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940689","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

Mitigating amine-induced gold depression: mechanistic insights into stepwise xanthate addition in copper–gold flotation with pyrrhotite rejection 减轻胺诱导的金抑制：在磁黄铁矿排斥铜金浮选中逐步添加黄药的机理

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-06 DOI: 10.1016/j.mineng.2025.110056

Foad Raji , Tiisetso Moimane , Ronel Kappes , Alireza Rezvani , Yongjun Peng

{"title":"Mitigating amine-induced gold depression: mechanistic insights into stepwise xanthate addition in copper–gold flotation with pyrrhotite rejection","authors":"Foad Raji , Tiisetso Moimane , Ronel Kappes , Alireza Rezvani , Yongjun Peng","doi":"10.1016/j.mineng.2025.110056","DOIUrl":"10.1016/j.mineng.2025.110056","url":null,"abstract":"<div><div>The sodium metabisulfite (SMBS)–triethylenetetramine (TETA) system is widely used in copper–gold flotation to depress pyrrhotite, but often reduces gold recovery due to competitive TETA adsorption on gold surfaces. This study presents a practical, flowsheet-compatible strategy to counter this effect by optimising the dosage and addition sequence of sodium isobutyl xanthate (SIBX), the primary gold collector. Increasing the SIBX dosage from 2.5 to 5 g/t (added entirely in the flotation cell) improved gold recovery from 53% to 59%, but also raised pyrrhotite recovery. In contrast, splitting the same total SIBX dose between milling and flotation significantly improved gold recovery to 73% while maintaining pyrrhotite depression, highlighting the importance of extended interaction time and surface pre-conditioning. Electrochemical measurements showed that stepwise addition promotes a more stable and coherent xanthate/dixanthogen layer with enhanced surface passivation, interfacial resistance, and resistance to TETA disruption. Density functional theory calculations further revealed that TETA adsorbs preferentially at unprotected gold sites via electrostatic stabilisation and Au–N dative bonding. However, a well-organised xanthate layer sterically and electrostatically blocks TETA adsorption. These findings offer mechanistic insights into collector–depressant competition and demonstrate a simple, effective strategy to enhance gold recovery without compromising pyrrhotite selectivity.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110056"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897974","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

Selective flocculation mechanism of sodium oleate in flotation separation of cassiterite and calcite with cetylpyridinium bromide as a dispersant 油酸钠在十六烷基溴化吡啶浮选分离锡石和方解石中的选择性絮凝机理

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.mineng.2026.110079

Jinfang Lv , Chunli Zhang , Jinwen Li , Haiyu Qian

{"title":"Selective flocculation mechanism of sodium oleate in flotation separation of cassiterite and calcite with cetylpyridinium bromide as a dispersant","authors":"Jinfang Lv , Chunli Zhang , Jinwen Li , Haiyu Qian","doi":"10.1016/j.mineng.2026.110079","DOIUrl":"10.1016/j.mineng.2026.110079","url":null,"abstract":"<div><div>Under a dispersed system of cetylpyridinium bromide, selective flocculation mechanism of sodium oleate (NaOL) in flotation separation of cassiterite and calcite were investigated by micro-flotation experiments, turbidity measurements, particle size distribution analysis, contact angle measurements, zeta potentials measurements, infrared spectrum analysis and extended Derjaguin-Landau-Verwey-Overbeek (DLVO) calculation in this study. Compared with conventional flocculants, micro-flotation results demonstrated that addition of NaOL significantly enhanced the flotation separation between cassiterite and calcite. Results of turbidity tests and particle size distribution showed that NaOL effectively reduced the suspension turbidity and increased the particle size of minerals. Moreover, the addition of NaOL increased contact angle of cassiterite, improving the hydrophobicity of cassiterite. Zeta potentials measurements proved that the surfaces of cassiterite and calcite had positive surface charges after interaction with NaOL at pH values below 10.45. Infrared spectrum analysis demonstrated that NaOL acted on the surface of cassiterite and calcite in the form of chemisorption. Extended DLVO theory proved that the addition of NaOL reduced the electrostatic repulsion between cassiterite particles and enhanced hydrophobic attraction, leading to the mutual aggregation between cassiterite particles. The selective flocculation of NaOL facilitated the efficient separation of fine-grained cassiterite and calcite.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110079"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962552","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

Systematic DEM parameter calibration for copper ore crushing 铜矿石破碎系统DEM参数标定

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.mineng.2026.110062

Xin Wang, Lei Sun, Zhiyong Gao, Yang Cao, Wei Sun, Miaoxiang Ai, Qiqiang Lin, Yi Qiao

{"title":"Systematic DEM parameter calibration for copper ore crushing","authors":"Xin Wang, Lei Sun, Zhiyong Gao, Yang Cao, Wei Sun, Miaoxiang Ai, Qiqiang Lin, Yi Qiao","doi":"10.1016/j.mineng.2026.110062","DOIUrl":"10.1016/j.mineng.2026.110062","url":null,"abstract":"<div><div>The Discrete Element Method (DEM) is widely applied to analyze the mechanical behavior and breakage characteristics of ores and rock-like materials. The accuracy of DEM simulations, however, depends critically on the proper calibration of model parameters. In this study, a systematic calibration framework for copper ore was developed by combining laboratory testing, numerical simulations, and a response surface methodology based on the angle of repose (AoR). The calibrated parameter set includes both the fundamental physical properties required for the DEM contact model and the key parameters used in constructing Bonded-Particle Models (BPM) and Particle Replacement Models (PRM). Validation through uniaxial compression and single-particle impact tests confirms that the calibrated parameters accurately captured the material’s strength and fragmentation behavior. The results indicated that the proposed calibration approach yields consistent parameters and is suitable for modeling copper ore comminution. This framework provides a practical reference for subsequent research and engineering applications in mineral processing.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110062"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979335","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}

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Synergistic strategy for enhanced bio-oxidation of refractory gold concentrate with high arsenic and sulfur: ferric oxidation with mixed organic nutrients supplementation 强化高砷高硫难处理金精矿生物氧化的协同策略：铁氧化与混合有机营养物的补充

IF 5 2区工程技术

Minerals Engineering Pub Date : 2026-04-01 Epub Date: 2026-01-09 DOI: 10.1016/j.mineng.2025.110050

Shiqi Zhang , Hongying Yang , Linlin Tong , Zhenan Jin , Pengcheng Ma

{"title":"Synergistic strategy for enhanced bio-oxidation of refractory gold concentrate with high arsenic and sulfur: ferric oxidation with mixed organic nutrients supplementation","authors":"Shiqi Zhang , Hongying Yang , Linlin Tong , Zhenan Jin , Pengcheng Ma","doi":"10.1016/j.mineng.2025.110050","DOIUrl":"10.1016/j.mineng.2025.110050","url":null,"abstract":"<div><div>The bio-oxidation of refractory gold concentrates with high arsenic and sulfur contents is inefficient, due to its slow reaction kinetics and the arsenic toxicity. To address this limitation, present study proposed a novel strategy involving ferric (Fe<sup>3+</sup>) pre-oxidation synergistically combined with the simultaneous addition of hydrolyzed rice husk (HRH) and urea. Chemical and interfacial analyses revealed that ferric oxidation removed 13.4 ± 1.4 % of arsenic (As) from the concentrate and disrupted the physicochemical structures of mineral surfaces (pyrite and arsenopyrite), thereby creating favorable conditions for subsequent microbial growth, adsorption, and mineral dissolution. Bio-oxidation analysis demonstrated that urea supplementation significantly stimulated the growth of iron-oxidizing microorganisms, predominantly <em>Leptospirillum</em> spp., while HRH addition promoted the proliferation of the mixotrophic <em>Sulfobacillus</em> spp. and enhanced its adsorption capacity by improving mineral surface hydrophilicity. The combined effect of HRH and urea effectively optimized the microbial community structure, increasing species diversity and evenness, which in turn enhanced Fe<sup>3+</sup>/Fe<sup>2+</sup> cycling and the metabolism of the sulfur passivation layer. This effectively enhanced the reaction kinetics of the sulfide minerals. Consequently, this synergistic strategy improved the bio-oxidation efficiencies of Fe and S by 1.17-fold and 1.42-fold, respectively, compared with conventional bio-oxidation, and elevated the cyanide leaching levels of Au and Ag to 97.3 ± 0.5 % and 93.6 ± 0.8 % (31.0 % and 30.7 % improvements). This research provides a novel technical approach and theoretical foundation for the efficient and environmentally friendly processing of complex refractory gold ores.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"238 ","pages":"Article 110050"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940751","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