Minerals Engineering最新文献_第9页

Micro-CT imaging of bubble clusters: Extending single mineral observations to a real ore system 气泡团簇的微ct成像：将单一矿物观察扩展到真实的矿石系统

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.mineng.2026.110071

Sayed Janishar Anzoom, Ghislain Bournival, Seher Ata

In a fluidized-bed flotation system, hydrophobic particles are often buoyed in the pulp phase as bubble clusters. However, the impact of these clusters on the flotation process is not thoroughly understood due to a lack of characterization techniques to study their properties. A technique for studying the properties of clusters using micro-computed tomography (micro-CT) was established with single mineral particles (Anzoom et al., 2024). This study aims to extend this approach to real ores, such as copper ore, where the particles consist of different minerals, to gain a more comprehensive understanding of the properties of bubble clusters. The approach integrates micro-CT, X-ray, diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS) to perform three-dimensional quantitative characterization of bubble clusters and visualize the internal structure and distribution of different mineral phases present in the particles. Two methods were used to generate clusters: one involving a hand-shaking experiment and another using a fluidised-bed flotation system. Results revealed that cluster characteristics vary depending on their formation method and the particle size distribution. Particle-particle aggregation was more pronounced in the cluster formed using the hand-shaking experiment. The hydrophobic chalcopyrite mineral phase was observed attaching to bubbles, while gangue minerals were engulfed within particles transported by the bubble clusters. While this study focuses on copper ore, which contains a high concentration of chalcopyrite, the method is applicable to studying bubble clusters with any mineral particles.

在流化床浮选系统中，疏水颗粒通常以气泡团簇的形式浮在矿浆相中。然而，由于缺乏表征技术来研究其性质，这些团簇对浮选过程的影响尚未完全了解。一种利用微计算机断层扫描（micro-CT）研究单个矿物颗粒簇性质的技术被建立起来（Anzoom et al., 2024）。本研究旨在将这种方法扩展到真实的矿石，如铜矿石，其中颗粒由不同的矿物组成，以获得对气泡团簇性质的更全面的了解。该方法将微ct、x射线、衍射（XRD）、扫描电子显微镜与能量色散x射线能谱（SEM-EDS）相结合，对气泡团簇进行三维定量表征，并可视化颗粒中不同矿物相的内部结构和分布。研究人员使用了两种方法来生成簇：一种是握手实验，另一种是流化床浮选系统。结果表明，聚类特征随其形成方式和粒径分布的不同而不同。在握手实验形成的团簇中，粒子-粒子聚集更为明显。观察到疏水黄铜矿矿物相附着在气泡上，而脉石矿物被气泡团运输的颗粒吞没。该方法适用于任何矿物颗粒的气泡团簇研究，但研究对象为铜矿石，其中黄铜矿含量较高。

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引用次数: 0

Deep learning-based bubble characterization and growth model refinement in gas–solid separation fluidized beds 基于深度学习的气固分离流化床气泡表征及生长模型改进

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-09 DOI: 10.1016/j.mineng.2026.110070

Song Wang , Yanhong Fu , Yandaizi Zhou , Liang Dong , Tielin Wang , Dongsheng He

In gas–solid fluidized beds, distributor-governed bubble dynamics critically govern system efficiency and particle separation. However, traditional bubble identification methods based on thresholding and edge detection often struggle with accuracy due to their reliance on low-level image features. This study applies deep learning-based image semantic segmentation to quantitatively analyze bubble distribution and evolution in gas–solid fluidized beds equipped with conventional perforated distributors (CPD) or micro-orifice distributors (MOD). The deep learning method used in this study achieved 98.40% pixel accuracy and 83.92% Mean Intersection over Union (MIoU) in bubble image segmentation. Experimental results showed that MOD reduced average bubble diameter by 36–55% and lowered bed density standard deviation by 60.76% compared to CPD fluidized beds. Analysis of bubble coalescence mechanisms indicates that MOD suppresses coalescence rates through high-density micro-jetting flows, significantly improving bed density stability. Time-domain and frequency-domain analyses of bed pressure drop signals reveals that the MOD fluidized bed exhibits weaker periodic oscillations at the influence of small bubbles. The minimum standard deviation of bed density reached 0.031 g/cm³, compared to 0.079 g/cm³ for the CPD fluidized bed. A region-specific bubble growth model was developed by introducing parameter k corrections to traditional models, distinguishing between the near-distributor and upper bed regions, with prediction errors within 30%. These results provide a theoretical basis for the zonal optimization of gas–solid separation fluidized beds.

在气固流化床中，分布器控制的气泡动力学对系统效率和颗粒分离起着关键的控制作用。然而，传统的基于阈值和边缘检测的气泡识别方法由于依赖于低层次的图像特征，往往难以准确识别。本研究采用基于深度学习的图像语义分割方法，定量分析了传统穿孔分布器（CPD）和微孔分布器（MOD）气固流化床中气泡的分布和演化。本研究使用的深度学习方法在气泡图像分割中，像素精度达到98.40%,MIoU （Mean Intersection over Union）达到83.92%。实验结果表明，与CPD流化床相比，MOD可使平均气泡直径减小36-55%，使床层密度标准差降低60.76%。气泡聚结机理分析表明，MOD通过高密度微喷流抑制了气泡聚结速率，显著提高了床层密度稳定性。对床层压降信号的时域和频域分析表明，在小气泡影响下，MOD流化床表现出较弱的周期振荡。床层密度的最小标准偏差达到0.031 g/cm3，而CPD流化床的最小标准偏差为0.079 g/cm3。通过对传统模型引入参数k校正，建立了区域性气泡生长模型，区分了近分布区和上层区，预测误差在30%以内。研究结果为气固分离流化床分区优化提供了理论依据。

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引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-09 DOI: 10.1016/j.mineng.2026.110061

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

An efficient, low-impact technology is needed to recover rare earth elements (REEs) from the environment. We previously showed that phosphorylated yeast (P-yeast) effectively adsorbs REEs in acidic solutions. This study evaluates P-yeast for REE recovery from Tsukahara hot spring water, which has high mineral ion concentrations. This hot spring water contains higher levels of base metals and REEs than others. By adjusting the pH, we achieved nearly 100 % removal of Al and Fe, leaving 43 %–67 % of REEs in the supernatant. Remarkably, P-yeast adsorbed almost all REEs, with an Mg adsorption ratio of about 8.6 %, while removing Mg effectively. REEs were desorbed using 1.0 M HCl, achieving a 31 % recovery ratio after three desorption cycles for all seven REEs. Overall, P-yeast is an effective method for REE recovery, showcasing the potential of biosorbents.

从环境中回收稀土元素需要一种高效、低影响的技术。我们之前发现磷酸化酵母（p -酵母）在酸性溶液中有效吸附稀土。本研究评价了p -酵母菌对高矿质离子含量的土原温泉水中稀土元素的回收效果。这里的温泉比其他温泉含有更多的基本金属和稀土元素。通过调整pH，我们实现了几乎100%的Al和Fe的去除，在上清中留下43% - 67%的ree。p -酵母菌对稀土元素几乎全部吸附，对Mg的吸附率约为8.6%，对Mg的去除效果较好。用1.0 M HCl解吸7种稀土元素，经过3个解吸循环，7种稀土元素的回收率均达到31%。综上所述，p -酵母是一种有效的稀土回收方法，显示了生物吸附剂的潜力。

引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-09 DOI: 10.1016/j.mineng.2025.110050

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

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 (Fe³⁺) 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 Leptospirillum spp., while HRH addition promoted the proliferation of the mixotrophic Sulfobacillus 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 Fe³⁺/Fe²⁺ 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.

高砷高硫难处理金精矿由于反应动力学慢，且具有砷毒性，生物氧化效率低。为了解决这一问题，本研究提出了一种新的策略，即铁（Fe3+）预氧化与水解稻壳（HRH）和尿素同时添加协同作用。化学和界面分析表明，铁氧化从精矿中去除了13.4±1.4%的砷（As），破坏了矿物表面（黄铁矿和毒砂）的物理化学结构，从而为随后的微生物生长、吸附和矿物溶解创造了有利条件。生物氧化分析表明，尿素的添加显著刺激了铁氧化微生物的生长，主要是钩端螺旋体，而HRH的添加促进了混合营养型硫杆菌的增殖，并通过改善矿物表面亲水性来增强其吸附能力。HRH和尿素的联合作用有效地优化了微生物群落结构，增加了物种多样性和均匀性，从而促进了Fe3+/Fe2+的循环和硫钝化层的代谢。这有效地提高了硫化矿物的反应动力学。结果表明，与传统生物氧化相比，该协同策略将Fe和S的生物氧化效率分别提高了1.17倍和1.42倍，并将Au和Ag的氰化浸出水平提高到97.3±0.5%和93.6±0.8%（分别提高31.0%和30.7%）。本研究为复杂难处理金矿石的高效、环保处理提供了新的技术途径和理论基础。

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引用次数: 0

Assessing the potential of phosphate mine tailings through advanced characterization and spatial modelling 基于先进表征和空间模型的磷矿尾矿潜力评价

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-09 DOI: 10.1016/j.mineng.2025.110046

Kaoutar Erraihani , Yassine Taha , Noaman Bouhlali , Mustapha El Ghorfi , Manar Derhy , Mostafa Benzaazoua , Yassine Ait-Khouia

Phosphate mine tailings are often treated as waste, even though they contain significant residual phosphorus (P₂O₅) and rare earth elements (REEs). Reprocessing these tailings presents a promising opportunity for recovering critical raw materials (CRMs) to support the green energy transition and sustainable fertilizer production. Phosphate tailings storage facilities (TSFs) occupy large land areas, pose long-term geotechnical risks and lock up critical raw materials. This study presents an integrated approach to evaluate the residual value of phosphorus and rare earth elements lost within the phosphate tailings from Youssoufia site (Morocco) by combining strategic drill cores sampling, comprehensive physical, chemical and mineralogical characterization and 3D modelling. The chemical analysis results were compiled into a database, which was then geo-referenced and integrated to develop a 3D block model using DATAMINE StudioRM software. On average, the tailings contain between 10 and 16 wt% P₂O₅ along with approximately 250 ppm of REEs. Around 50% of francolite particles are free, indicating high recovery potential via flotation and demonstrated a positive correlation between P₂O₅ and REEs. 3D modelling identified spatially enriched zones for targeted re-mining. Results demonstrate that combining drilling, advanced mineralogy and 3D modelling transforms waste into a secondary resource a key step toward circular phosphate supply strategies.

磷矿尾矿虽然含有大量的磷（P2O5）和稀土元素（ree），但通常被当作废物处理。这些尾矿的后处理为回收关键原料（crm）提供了一个有希望的机会，以支持绿色能源转型和可持续肥料生产。磷酸盐尾矿储存设施（TSFs）占地面积大，长期存在岩土风险，并锁定了关键原材料。本研究提出了一种综合方法，通过结合战略岩心取样、综合物理、化学和矿物学表征以及3D建模，来评估摩洛哥Youssoufia遗址磷酸盐尾矿中磷和稀土元素的残值。化学分析结果被编译到数据库中，然后使用DATAMINE StudioRM软件进行地理参考和集成，以开发3D块体模型。平均而言，尾矿含有10%至16%的P2O5以及大约250 ppm的稀土。游离矿颗粒约50%，表明浮选回收率高，且P2O5与稀土元素呈正相关。三维建模确定了有针对性再采矿的空间富集区。结果表明，将钻井、先进矿物学和3D建模相结合，可以将废物转化为二次资源，这是实现循环磷酸盐供应策略的关键一步。

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引用次数: 0

Exploring electric arc furnace dust as a new source of rare earth elements: comparative leaching strategies and two-step selective precipitation 探索电弧炉粉尘作为稀土元素的新来源：比较浸出策略和两步选择性沉淀

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-08 DOI: 10.1016/j.mineng.2026.110060

Seyedeh Neda Mousavi , Seyyed Mohammad Mousavi , Francesca Beolchini

The recovery of rare earth elements (REEs) from electric arc furnace dust (EAFD) was investigated through a post-bioleaching process involving leaching and selective precipitation. Due to the low extraction efficiency in the bioleaching process, bio and chemical leaching were performed on the EAFD bioleaching residues using metabolites from Yarrowia lipolytica and Acidithiobacillus thiooxidans, as well as citric and sulfuric acids. Sulfuric acid was the most effective leaching agent, achieving a REEs concentration of 119.6 mg/l under optimized conditions (1 M, 6 h, 30 °C). Precipitation was then employed to recover REEs using oxalic acid and disodium carbonate. Oxalic acid precipitated cerium selectively but removed a significant amount of manganese, limiting its selectivity. A two-step precipitation strategy using disodium carbonate was developed to enhance the purity of REEs. The first step efficiently removed iron and a portion of manganese, while the second step focused on REEs recovery. In this situation, the enrichment factor of the total REEs content reached 148. Speciation modeling with MEDUSA software supported experimental findings and guided the process. This integrated approach demonstrates the feasibility of post-bioleaching REEs recovery from the EAFD, offering insights into process design and metal separation strategies.

采用浸出-选择性沉淀的后生物浸出工艺对电弧炉粉尘中稀土元素的回收进行了研究。由于生物浸出过程中萃取效率较低，利用多脂耶氏杆菌和酸性硫氧化硫杆菌的代谢物以及柠檬酸和硫酸对EAFD生物浸出渣进行了生物浸出和化学浸出。硫酸是最有效的浸出剂，在优化条件下（1m, 6 h, 30°C），稀土浓度达到119.6 mg/l。然后用草酸和碳酸二钠沉淀法回收稀土。草酸选择性地沉淀铈，但去除大量的锰，限制了其选择性。采用碳酸二钠两步沉淀法提高稀土元素的纯度。第一步有效地去除了铁和部分锰，而第二步侧重于稀土的回收。在这种情况下，稀土元素的富集系数达到148。利用MEDUSA软件进行物种形成建模，支持实验结果并指导过程。这种综合方法证明了从EAFD中回收生物浸出后稀土元素的可行性，为工艺设计和金属分离策略提供了见解。

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引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-08 DOI: 10.1016/j.mineng.2025.110045

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

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 (CuSO₄) 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.

钒钛磁铁矿是一种主要由铁（Fe）、钒(V)和钛（Ti）组成的共生矿石。在典型的选矿工艺中，磁铁矿首先通过磁选和重选相结合的方法从钒钛磁铁矿中分离出来。剩下的钛铁矿尾矿随后进行脱硫和富钛处理。本研究首先对钒钛磁铁矿的矿物学特征进行了分析，并对其进行了脱硫浮选。该矿石中主要有用的金属矿物为钛铁矿和磁铁矿，以及少量含硫矿物。其中，约98%的硫(S)以硫化物形式存在，主要是磁黄铁矿。值得注意的是，81.59%的磁黄铁矿颗粒在粒径小于0.075 mm时解离度超过80%。结合磁黄铁矿矿物解离分析，在−0.075 mm占比约80%的条件下进行磨矿粒度试验，确定最佳磨矿粒度为−0.075 mm的85%。在磨矿粒度为85% < 0.075 mm、硫酸铜（CuSO4）用量为300 g/t、矿浆pH为4的最佳脱硫浮选条件下，脱硫率可达91.33%，尾矿中S品位仅为0.05%。对尾矿进行工艺矿物学研究后发现，剩余硫化物的浮选困难是由于它们的嵌布粒度细，结合关系密切，解离率低。对该钒钛磁铁矿进行了脱硫前后的工艺矿物学研究，为高效脱硫分离提供了基础依据。

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引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-08 DOI: 10.1016/j.mineng.2025.110054

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

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.

黄铜矿是一种复杂的亲水铜硅酸盐矿物，由于其难浮选的特性，在选矿方面面临着很大的挑战。常规硫化-黄药浮选回收黄铜矿效率不高。虽然组合捕收剂显著提高了氧化铜矿物的可浮性，但其协同吸附机制尚不清楚。通过浮选试验、x射线光电子能谱（XPS）、x射线能谱扫描电镜（SEM-EDS）、傅里叶变换红外光谱（FT-IR）、Zeta电位、接触角测量和吸附试验，研究了氨基黄药钾（PAX）和铜铁复合捕收剂对黄铜矿可浮性的影响及其吸附机理。浮选结果表明，与单一捕收剂相比，组合捕收剂可显著提高黄铜矿回收率（83.33%）。机理分析表明，PAX和铜铁在硫化铜表面具有协同吸附作用。PAX主要化学吸附在硫化铜表面的Cu(I)位点上，而铜铁优先与不稳定硫化和未硫化铜表面的Cu（II）位点螯合，导致它们相互交错重叠共吸附。此外，PAX和铜铁在组合体系中的吸附增强，提高了组合捕收剂吸附层的厚度、密度和稳定性，从而增强了黄钻的表面疏水性和可浮性。

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引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-08 DOI: 10.1016/j.mineng.2025.110055

Pavels Kapitulskis, Ulises Miranda Ordóñez, Aleksander Sokolov

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.

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 T = 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.

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.

我们建议使用一种简单的方法来补偿矩阵效应，以便在存在高浓度元素的情况下计算低元素浓度。该方法基于康普顿辐射散射，充分考虑了样品元素对低能光子的选择性吸收。该方法可用于多元素矿石的在线XRF分析。将该方法应用于矿石中Co和Cu的定量测定，在Co的浓度范围为0.06 ~ 0.18%，Cu的浓度范围为1.56 ~ 3.24%，测量偏差不大于15%。选择测量时间T = 180 s时，Co和Cu的检出限分别为0.022%和0.025%。定量限分别为0.065%和0.074%。对于稀土矿石的在线XRF分析，我们对薄样品（1-2 mm）的实验表明，REE的检测限可以达到几个ppm的值。它们的定量限小于50ppm。这种水平的分析能力极大地扩展了在线XRF方法在稀土多元素矿石分析中的应用。

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引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-07 DOI: 10.1016/j.mineng.2026.110057

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

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-CaF₂ 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 SiO₂ 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 H₃O⁺ on mineral surfaces. This proves highly advantageous for the progression of acid leaching reactions, thereby significantly improving potassium extraction.

从不溶性钾盐矿床（如磷钾伴生矿床（矿山废物））中提取可溶性钾对于钾肥需求量大但可溶性钾资源严重缺乏的中国来说尤为重要。由于矿石中存在结构稳定的钾长石，如何增强其分解过程是当前需要解决的技术难题。本研究利用含羟基化合物（包括小分子量醇，如月桂醇、1,4-丁二醇、甘油和具有不同分子量和官能团的聚醚聚酯）研究了在盐酸- caf2体系中磷钾伴生矿的强化浸出。结果表明，各含羟基化合物均有较好的强化效果，其中以月桂醇效果最好，钾浸出效率提高8.3%。结果表明：含羟基化合物加速了沉淀和过滤速度，缩短了固液分离时间；降低渗滤液表面张力和附着力，促进润湿渗透；增加了滤渣的比表面积，有利于SiO2的分离，促进了酸浸反应。DFT（密度泛函理论）模拟表明，含羟基化合物的加入提高了矿物表面对h30 +的吸附强度。这对酸浸反应的进行是非常有利的，从而大大提高了钾的提取率。

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引用次数: 0