Minerals Engineering最新文献_第8页

Flow ability of cemented paste backfill with high-volume industrial wastes 大容量工业废弃物胶结膏体充填体的流动性能

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-20 DOI: 10.1016/j.mineng.2026.110073

Qianlong Li , Mamadou Fall

This study investigates the rheological properties of cemented paste backfill (CPB) incorporating high-volume slag and fly ash (FA) as sustainable substitutes for Portland cement type I (PCI). The research aims to enhance CPB flowability while maximizing the reuse of industrial byproducts. Rheological tests were conducted on CPB samples composed of silica tailings with varying PCI/slag/FA ratios to assess their effects on yield stress and viscosity. Using a central composite design and response surface methodology, mathematical models were developed to quantify and predict the relationships between rheological parameters and binder composition. Microstructural and monitoring analyses revealed that slag and FA influence CPB flowability through particle size, shape, and hydration characteristics. Results indicate that replacing up to 80 % of PCI with slag and FA reduces yield stress and viscosity by 4.2 %–21.7 % and 0.7 %–5.0 %, respectively, improving flowability for mine filling applications. However, excessive slag and FA contents (90 %) increase fine particle interactions, elevating yield stress and viscosity. Time-dependent rheological changes were observed, with yield stress and viscosity increasing by 40 %–66.7 % and 3.9 %–7.1 % during two hours of curing, driven by hydration product formation. The optimal binder ratio (10.15 % PCI, 20.3 % slag, and 79.7 % FA) achieves a desirable balance of low yield stress (137.4 Pa) and viscosity (2.91 Pa·s) with over 90 % industrial waste reutilization. This study provides a robust framework for optimizing CPB formulations, addressing key challenges in sustainable mining practices, and guiding the large-scale reuse of industrial wastes.

本研究研究了含大量矿渣和粉煤灰（FA）作为I型硅酸盐水泥（PCI）的可持续替代品的胶结膏体充填体（CPB）的流变特性。该研究旨在提高CPB的流动性，同时最大限度地利用工业副产品。对不同PCI/渣/FA比例的硅尾矿组成的CPB试样进行流变学试验，评估其对屈服应力和粘度的影响。利用中心复合材料设计和响应面方法，建立了数学模型来量化和预测流变参数与粘合剂组成之间的关系。微观结构和监测分析表明，渣和FA通过粒径、形状和水化特性影响CPB的流动性。结果表明，用矿渣和FA代替80%的PCI，使矿渣的屈服应力和粘度分别降低4.2% ~ 21.7%和0.7% ~ 5.0%，改善了矿用充填的流动性。然而，过量的渣和FA含量（90%）增加了细颗粒的相互作用，提高了屈服应力和粘度。观察到随时间变化的流变学变化，在水化产物形成的驱动下，在2小时的固化过程中，屈服应力和粘度分别增加了40% - 66.7%和3.9% - 7.1%。最佳粘结剂配比（10.15% PCI， 20.3%矿渣，79.7% FA）达到了低屈服应力（137.4 Pa）和粘度（2.91 Pa·s）的理想平衡，工业废渣回收率达到90%以上。该研究为优化CPB配方、解决可持续采矿实践中的关键挑战以及指导工业废物的大规模再利用提供了一个强大的框架。

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引用次数: 0

A review of research progress in the flotation separation of galena and chalcopyrite with a focus on green reagents 以绿色药剂为重点，综述了方铅矿与黄铜矿浮选分离的研究进展

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-20 DOI: 10.1016/j.mineng.2026.110102

Yanling Jin , Haiyun Xie , Liuyang Dong , Peilun Shen , Chao Lv , Taiguo Jiang , Dianwen Liu

Copper and lead are essential non-ferrous metals widely used in construction, energy, transportation, electronics, and defense industries. Galena (PbS) and chalcopyrite (CuFeS₂), the primary carrier minerals of copper-lead sulfide ores, commonly coexist in complex polymetallic deposits and are often intergrown at fine scales. Their similar surface physicochemical properties and the presence of surface oxidation products lead to poor flotation selectivity, resulting in mutual contamination of concentrates and low resource utilization efficiency. Flotation remains the most effective method for copper-lead separation, in which selective depression plays a decisive role. However, conventional inorganic depressants, such as chromates and cyanides, are increasingly restricted due to their high toxicity and environmental risks. In this review, the geological occurrence, crystal structures, and surface physicochemical characteristics of galena and chalcopyrite are systematically summarized. The interfacial mechanisms governing the flotation separation of galena and chalcopyrite are critically reviewed, with particular attention to the adsorption behavior, selectivity differences, and structure–activity relationships of collectors and depressants. The molecular structures, action modes, and structure–activity relationships of traditional and novel flotation reagents are classified and compared. Emphasis is placed on recent advances in green organic depressants, including small-molecule compounds, natural polymers, and synthetic polymers, as well as their selective regulation mechanisms in copper-lead flotation systems. In addition, the synergistic effects between collectors and depressants and their implications for improving selectivity are discussed. This review highlights that the rational design of environmentally friendly reagent systems and the integration of collector–depressant synergy are key to achieving efficient and sustainable flotation separation of complex copper-lead sulfide ores. The insights summarized herein aim to provide theoretical guidance and practical references for the development of green flotation reagents and the optimization of copper-lead separation processes.

铜和铅是重要的有色金属，广泛用于建筑、能源、交通、电子和国防工业。方铅矿（PbS）和黄铜矿（CuFeS2）是铜铅硫化物矿石的主要载体矿物，在复杂多金属矿床中通常共存，并以细尺度共生。它们表面物化性质相近，表面氧化产物的存在导致浮选选择性差，导致精矿相互污染，资源利用效率低。浮选仍是最有效的铜铅分离方法，其中选择性抑制起决定性作用。然而，传统的无机抑制剂，如铬酸盐和氰化物，由于其高毒性和环境风险，越来越受到限制。本文系统地综述了方铅矿和黄铜矿的地质产状、晶体结构和表面物理化学特征。本文综述了方铅矿和黄铜矿浮选分离的界面机制，特别关注了捕收剂和抑制剂的吸附行为、选择性差异和构效关系。对传统浮选药剂和新型浮选药剂的分子结构、作用方式和构效关系进行了分类和比较。重点介绍了绿色有机抑制剂的最新进展，包括小分子化合物、天然聚合物和合成聚合物，以及它们在铜铅浮选系统中的选择性调节机制。此外，还讨论了捕收剂和抑制剂之间的协同效应及其对提高选择性的意义。合理设计环境友好型药剂体系，结合捕收剂与抑制剂的协同作用，是实现复杂铜铅硫化矿石高效、可持续浮选分离的关键。旨在为绿色浮选药剂的开发和铜铅分离工艺的优化提供理论指导和实践参考。

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引用次数: 0

The role of ore and host rock mineralogy in the beneficiation of a VMS deposit: Insights from Rävliden North, northern Sweden 矿石和寄主岩石矿物学在VMS矿床选矿中的作用：来自Rävliden North，瑞典北部的见解

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-19 DOI: 10.1016/j.mineng.2026.110076

Jonathan Rincon , Nils Jansson , Yousef Ghorbani , Iris McElroy , Helen Thomas , Dominique Brising , Nils-Johan Bolin , Christina Wanhainen

The grinding and flotation performance of Zn-Pb-Cu-Ag ores is highly sensitive to ore mineralogy, host rock composition, and textural variability, factors that are often overlooked in favour of bulk grade values. This study examines the Rävliden North Zn-Cu-Pb-Ag volcanogenic massive sulphide deposit (VMS) deposit in northern Sweden. Two main ore types are identified: massive sphalerite- and galena-rich ore and chalcopyrite-rich vein-dominated ore that coupled with host rock type led to further 6 sub-types. Mineralogical and textural characterisation of flotation feed and products, using Quantitative Evaluation of Minerals by Scanning Electron Microscopy (QEMSCAN®) and element to mineral conversion (EMC) based on multi-element chemical assays, reveals that fine-grained, sphalerite-dominated ore is more amenable to grinding and exhibit better liberation, enhancing flotation efficiency. In contrast, chalcopyrite-rich ore perform better in Cu-Pb flotation but is harder to grind due to its silicate-rich gangue (e.g., quartz). Minerals such as micas, amphiboles, and carbonates affect ore hardness, and ore mineralogy (sphalerite, galena, chalcopyrite and Ag mineralogy) directly affects flotation efficiency. Blending of poor grade and hard to grind (problematic) ores with better grade and softer to grind (fairly good to good) ore is recommended to improve concentrate quality. Precious, critical, and deleterious elements are mostly recovered in the chalcopyrite-galena flotation circuit in amalgams (Ag, Hg), dyscrasite (Ag, Sb), hessite (Ag), sulphosalts (Ag, Sb, Bi), native Bi, and tellurobismuthite (Bi). These minerals are fine-grained (< 20 µm) and poorly liberated, leading to recovery in both target and non-target flotation concentrates. Nevertheless, established metallurgical methods enable their efficient extraction maximising ore value. This study highlights the importance of process mineralogy for improved beneficiation in concentration circuits, and the understanding of by-products during processing of complex polymetallic ores.

Zn-Pb-Cu-Ag矿石的磨矿和浮选性能对矿石矿物学、寄主岩石组成和结构变异性高度敏感，而这些因素往往被忽视，有利于整体品位值。本文对瑞典北部Rävliden北Zn-Cu-Pb-Ag火山块状硫化物矿床（VMS）进行了研究。确定了富块状闪锌矿、方铅矿和以脉状铜矿为主的富闪锌矿2大矿石类型，并与寄主岩石类型结合，形成6个矿石类型。利用扫描电子显微镜矿物定量评价（QEMSCAN®）和基于多元素化学分析的元素矿物转换（EMC）对浮选原料和浮选产品进行了矿物学和结构表征，结果表明，细粒、闪锌矿为主的矿石更易于磨矿，释放性更好，提高了浮选效率。相比之下，富黄铜矿的铜铅浮选效果较好，但由于其富含硅酸盐的脉石（如石英），较难磨矿。云母、角闪石、碳酸盐等矿物影响矿石硬度，矿石矿物学（闪锌矿、方铅矿、黄铜矿、银矿物学）直接影响浮选效率。建议将品位差、难磨（有问题）的矿石与品位较好、难磨（从较好到较好）的矿石混合，以提高精矿质量。在黄铜矿—方铅矿浮选回路中，贵重、关键和有害元素主要在银汞合金（Ag、Hg）、重晶石（Ag、Sb）、黑石（Ag）、亚硫酸盐（Ag、Sb、Bi）、天然Bi和碲辉钼矿（Bi）中回收。这些矿物颗粒细（约20 μ m），游离度差，导致在目标和非目标浮选精矿中均有回收。然而，现有的冶金方法使其能够有效地提取矿石，使其价值最大化。本研究强调了工艺矿物学对提高选矿工艺的重要性，以及对复杂多金属矿石加工过程中副产品的理解。

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引用次数: 0

Mechanistic insights into the hydrogen-based phase transformation processes of iron-bearing manganese ores 含铁锰矿氢基相变过程的机理研究

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-17 DOI: 10.1016/j.mineng.2026.110083

Ruofeng Wang , Shuai Yuan , Jiangang Ku , Qinglong Fan , Yanjun Li

This study systematically investigates the hydrogen-based mineral phase transformation behavior of iron-bearing manganese ore, with particular emphasis on the reduction characteristics of hematite and pyrolusite. One-factor reduction experiments reveal that increasing roasting temperature and reduction time significantly enhance the reduction efficiency of both iron and manganese oxides. Hematite exhibits a temperature-dependent reduction pathway from Fe₂O₃ to Fe or via FeO at elevated temperatures, whereas pyrolusite undergoes stepwise reduction from MnO₂ to MnO. In mixed ore systems, magnetite or ferrous oxide formed during the hematite reduction process promotes the reduction of high-valence manganese oxides, resulting in a higher Mn²⁺ distribution rate than that obtained in individual pyrolusite reduction. These results demonstrate that the reduction behavior of iron-bearing manganese ore cannot be interpreted as a simple superposition of single-mineral systems.

系统研究了含铁锰矿氢基矿物相变行为，重点研究了赤铁矿和软锰矿的还原特征。单因素还原实验表明，提高焙烧温度和还原时间，均能显著提高铁锰氧化物的还原效率。赤铁矿表现出由Fe2O3还原为Fe或在高温下通过FeO还原的温度依赖性途径，而软锰矿则是由MnO2逐步还原为MnO。在混合矿石体系中，赤铁矿还原过程中形成的磁铁矿或氧化亚铁促进了高价锰氧化物的还原，导致Mn2+的分布率高于单独软锰矿还原过程。这些结果表明，含铁锰矿石的还原行为不能被解释为单一矿物体系的简单叠加。

引用次数: 0

Gaussian process modelling of an industrial flotation bank 工业浮选库的高斯过程建模

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-16 DOI: 10.1016/j.mineng.2026.110086

Johan Lindqvist , Khalid Atta , J. Derik le Roux , Andreas Johansson

A control-oriented Gaussian process regression (GPR) model of froth flotation is developed and compared to a previously developed parametric model. The model aims to predict the behaviour of froth flotation, taking into consideration which state variables are available from measurements: air recovery, top of froth bubble size, and pulp level. The framework encodes prior knowledge of a published flotation model. Each state is modelled using a separate GP, with a custom covariance function whose form is given by the flotation model. These kernels capture the interaction between the relevant state variables and manipulated variables. The model aims to balance the complexity required to explain such a complex process with the uncertainty of its instrumentation. To evaluate the ability of the GPR model to capture the process dynamics, the GP model is assessed using an industrial data set, demonstrating its capacity to improve the performance of state prediction. The purpose of the GPR model is to enable supervisory and advanced model-based control.

建立了面向控制的高斯过程回归（GPR）泡沫浮选模型，并与已有的参数模型进行了比较。该模型旨在预测泡沫浮选的行为，考虑到从测量中可以获得的状态变量：空气回收率，泡沫顶部气泡大小和纸浆水平。该框架对已发布的浮选模型的先验知识进行编码。每个状态都使用单独的GP进行建模，并使用自定义协方差函数，其形式由浮选模型给出。这些核捕获相关状态变量和被操纵变量之间的交互。该模型旨在平衡解释这样一个复杂过程所需的复杂性及其仪器的不确定性。为了评估GPR模型捕捉过程动态的能力，使用工业数据集对GP模型进行了评估，证明了其提高状态预测性能的能力。GPR模型的目的是实现监督和高级基于模型的控制。

引用次数: 0

Carboxyl-functionalized polystyrene nanoparticles as flotation collectors for siliceous phosphorite 羧基功能化聚苯乙烯纳米颗粒作为硅质磷矿浮选捕收剂

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-16 DOI: 10.1016/j.mineng.2026.110082

S. Al-Thyabat , H. Al-Zoubi , B. Albiss

Phosphorite is a non-renewable source of elemental phosphorus, an indispensable constituent of phosphate-based fertilizers. For low grade phosphorite ores, froth flotation is the most widely used upgrading technique. However, flotation collectors’ low performance and deteriorating selectivity in the presence of fine phosphorite increased interest in new types of nanoparticles −based collectors.

Carboxyl-functionalized polystyrene nanoparticles (FPSNPs) were synthesized by emulsion polymerization and evaluated as a replacement for the traditional sodium oleate (NaOL) collector. Nanoparticles characterization, adsorption isotherms, and flotation performance were evaluated by SEM, dynamic light scattering (DLS), FT-IR, and Uv–vis spectroscopy. Four adsorption isothermal models were used to compare the adsorption of FPSNPs and NaOL collector on phosphorite particle surface.

It was found that FPSNPs were positively charged with average size of 29 nm. Both FPSNPs and NaOL were physically adsorbed on phosphorite surface as a multilayer by either electrostatic interaction or precipitation. However, the maximum adsorption density of FPSNPs was higher than NaOL, indicating thicker layer of FPSNPs collector. This may be due to stronger interaction (i.e. more selectivity) between FPSNPs and Ca⁺² sites on both of phosphorite surface and those dissolved in the flotation pulp. On the other hand, flotation results showed that silica removal by FPSNPs was about 80 % compared with 58 % with NaOL., while the concentrate grade was 32.7 % P₂O₅ when 2010 g/tonne of FPSNPs collector was used. These findings contribute to our understanding of the mechanisms of nanoparticles −based collectors which facilitate the development of more efficient and environmentally friendly phosphorite collectors.

磷矿是一种不可再生的元素磷来源，是磷基肥料不可或缺的组成部分。对于低品位磷矿，泡沫浮选是目前应用最广泛的选别技术。然而，浮选捕收剂的低性能和选择性在细磷矿存在下恶化，增加了人们对新型纳米颗粒基捕收剂的兴趣。采用乳液聚合的方法合成了羧基功能化聚苯乙烯纳米颗粒（FPSNPs），并对其作为传统油酸钠（NaOL）捕收剂的替代品进行了评价。采用扫描电镜（SEM）、动态光散射（DLS）、红外光谱（FT-IR）和紫外可见光谱（Uv-vis）对纳米颗粒的表征、吸附等温线和浮选性能进行了评价。采用等温吸附模型比较了FPSNPs和NaOL捕收剂在磷矿颗粒表面的吸附效果。发现fpsnp带正电，平均尺寸为29 nm。FPSNPs和NaOL均通过静电相互作用或沉淀作用在磷矿表面形成多层吸附。但FPSNPs的最大吸附密度高于NaOL，说明FPSNPs捕收层较厚。这可能是由于fpsnp与磷矿表面和浮选浆中溶解的Ca+2位点之间更强的相互作用（即更强的选择性）。另一方面，浮选结果表明，fpsnp对二氧化硅的去除率约为80%，而NaOL的去除率为58%。选用2010 g/t fpsnp捕收剂时，P2O5精矿品位为32.7%。这些发现有助于我们理解纳米颗粒基捕收剂的机理，从而促进更高效、更环保的磷矿捕收剂的开发。

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引用次数: 0

Bioleaching of Co-bearing sulfide tailings by Acidithiobacillus ferrooxidans: Influencing factors, mechanism and kinetics 酸性氧化亚铁硫杆菌对含钴硫化物尾矿的生物浸出：影响因素、机理及动力学

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-15 DOI: 10.1016/j.mineng.2026.110074

Qiya Bian , Sha Deng , Wei Yang , Tao Long , Sirui Chen , Chuntao Yan , Yuran Wang , Qubing Li

The critical role of cobalt in renewable energy and advanced industries makes developing efficient recovery technologies from secondary resources an imperative. This study systematically investigates the bioleaching of Co-bearing sulfide tailings by Acidithiobacillus ferrooxidans under variable parameters, including pulp density, temperature, initial pH, and bacterial inoculum concentration. Under the condition of 8 % pulp density, 35 °C, an initial pH of 2.0, and an inoculum concentration of 2.5 × 10⁷ cells/mL, 44.53 % of cobalt extraction was obtained. Mineral morphology and phase evolution analyses, consistent with the kinetic fitting results based on the shrinking-core model, revealed that during the bacterial lag phase (0–5 days), pyrrhotite dissolved preferentially, and cobalt leaching was controlled by surface chemical reactions. Extensive pyrite dissolution occurred in the log-stationary phase (5–27 days), but jarosite precipitates formed a passivation layer that hindered cobalt release. Consequently, cobalt leaching shifted to diffusion control through the product layer. Meanwhile, H⁺ released during bacterial oxidation and jarosite formation drove extensive vermiculite dissolution. Elevated temperatures accelerated the oxidation of elemental sulfur and increased the solution acidity. This enhanced the breakdown of lepidocrocite and suppressed jarosite generation, thereby favoring cobalt leaching mechanisms, although the leaching efficiency decreased at 45 °C. These findings advance theoretical frameworks and provide fundamental principles for processing Co-bearing sulfide tailings/concentrates.

钴在可再生能源和先进工业中的关键作用使得开发有效的二次资源回收技术势在必行。本研究系统研究了酸化氧化亚铁硫杆菌在矿浆密度、温度、初始pH和细菌接种量等参数下对含钴硫化尾矿的生物浸出。在矿浆密度为8%、温度为35℃、初始pH为2.0、接种量为2.5 × 107 cells/mL的条件下，钴的提取率为44.53%。矿物形态和物相演化分析与基于收缩核模型的动力学拟合结果一致，表明在细菌滞后期（0 ~ 5 d），磁黄铁矿优先溶解，钴浸出受表面化学反应控制。在log-stationary phase（5-27天）发生了广泛的黄铁矿溶解，但黄钾铁矾沉淀形成了钝化层，阻碍了钴的释放。因此，钴浸出转变为通过产物层的扩散控制。同时，细菌氧化和黄钾铁矾形成过程中释放的H+推动了蛭石的广泛溶解。升高的温度加速了单质硫的氧化，增加了溶液的酸度。这促进了绢云母的分解，抑制了黄钾铁矾的生成，从而有利于钴的浸出机制，尽管浸出效率在45°C时下降。这些发现提出了理论框架，并为处理含钴硫化尾矿/精矿提供了基本原理。

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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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-14 DOI: 10.1016/j.mineng.2026.110079

Jinfang Lv , Chunli Zhang , Jinwen Li , Haiyu Qian

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.

在十六烷基溴化吡啶分散体系下，通过微浮选实验、浊度测量、粒度分布分析、接触角测量、zeta电位测量、红外光谱分析和扩展derjaguin - landau - vervey - overbeek （DLVO）计算，研究了油酸钠（NaOL）在锡石和方解石浮选分离中的选择性絮凝机理。微浮选结果表明，与常规絮凝剂相比，NaOL的加入显著促进了锡石与方解石的浮选分离。浊度试验和粒度分布结果表明，NaOL能有效降低悬浮浊度，提高矿物粒度。NaOL的加入增加了锡石的接触角，改善了锡石的疏水性。Zeta电位测量证明，在pH值低于10.45的条件下，与NaOL相互作用后，锡石和方解石表面带正电荷。红外光谱分析表明，NaOL以化学吸附的形式作用于锡石和方解石表面。扩展DLVO理论证明，NaOL的加入降低了锡石颗粒之间的静电斥力，增强了疏水吸引力，导致锡石颗粒之间的相互聚集。NaOL的选择性絮凝有利于细粒锡石和方解石的有效分离。

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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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub 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

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.

离散元法（DEM）被广泛应用于分析矿石和类岩材料的力学行为和破碎特性。然而，DEM模拟的准确性主要取决于模型参数的正确校准。本文采用室内试验、数值模拟和基于休止角的响应面方法相结合的方法，建立了铜矿石的系统标定框架。校准后的参数集既包括DEM接触模型所需的基本物理性质，也包括构建键合粒子模型（BPM）和粒子替换模型（PRM）所用的关键参数。通过单轴压缩和单颗粒冲击试验的验证证实，校准参数准确地捕获了材料的强度和破碎行为。结果表明，所提出的标定方法参数一致，适用于铜矿石粉碎过程的建模。该框架为后续的选矿研究和工程应用提供了实用参考。

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引用次数: 0

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 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.mineng.2026.110063

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

The efficient separation of fine-grained bastnaesite–monazite intergrowths remains a persistent challenge in the beneficiation of mixed rare-earth ores. In this study, we integrate micro-flotation with surface spectroscopy (FT-IR/XPS) and density functional theory (DFT) calculations to elucidate reagent–mineral interactions and to develop a selective flotation regime. Phthalic acid (PA) is identified as an effective selective collector, exhibiting substantially stronger interaction with bastnaesite than with monazite. Under weakly acidic conditions (pH ≈ 6.0) with aluminum sulfate as a conditioning reagent, closed-circuit flotation yields a bastnaesite concentrate grading 67.42 % REO at 89.15 % REO recovery, corresponding to ∼90.01 % bastnaesite purity. These results establish practical operating parameters for selective bastnaesite flotation from monazite and provide mechanistically informed guidance for collector selection in complex rare-earth flotation systems.

细粒氟碳铈-独居石共生体的高效分离是混合稀土矿选矿中一个长期存在的难题。在这项研究中，我们将微浮选与表面光谱（FT-IR/XPS）和密度泛函理论（DFT）计算相结合，以阐明试剂与矿物的相互作用，并建立一种选择性浮选制度。邻苯二甲酸（PA）被认为是一种有效的选择性捕收剂，与氟碳铈矿的相互作用明显强于与独居石的相互作用。在弱酸性条件下（pH≈6.0），以硫酸铝为调理剂，闭路浮选得到的氟碳铈矿精矿REO含量为67.42%，REO回收率为89.15%，对应的氟碳铈矿纯度为~ 90.01%。这些结果建立了从独居石中选择性浮选氟碳铈矿的实用操作参数，并为复杂稀土浮选系统中捕收剂的选择提供了力学指导。

引用次数: 0