Minerals Engineering最新文献_第10页

Leaching of complex copper concentrates in alkaline monosodium glutamate solutions 复合铜精矿在碱性味精溶液中的浸出

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-24 DOI: 10.1016/j.mineng.2025.109560

C.G. Perea , C.F Ihle , L. Dyer , S.Díaz Quezada , C. González , H. Estay

Recent studies have demonstrated that monosodium glutamate has the potential to be used as a lixiviant for copper extraction from oxides and metals in alkaline conditions, but there is a lack of studies of its performance in mixed copper sulfide-oxide ores. The applicability of the system to treat complex copper concentrates and the kinetics of copper leaching into oxygenated, alkaline glutamate solutions were investigated. Based on a series of monosodium glutamate concentrations, dissolved oxygen levels, and temperatures, the work assessed the influence of these parameters on the recovery of copper from 3 concentrate samples. The increase of glutamate concentration, temperature, and dissolved oxygen levels increase the leaching rate, with up to 90 % copper extraction from concentrates A and B after 12 h at the best conditions (0.5 M glutamate, 60 °C, dissolved oxygen 15–20 ppm). Kinetic analysis following a shrinking core model suggested that copper dissolution is predominantly mixed controlled, with diffusion through a product layer becoming increasingly important at higher temperatures. The activation energy values calculated for each concentrate were consistent with a mechanism that is partially chemical and partially diffusion controlled, also consistent with the very slow leaching behavior of chalcopyrite-dominated concentrates. These leaching results indicate that monosodium glutamate has potential as a novel, truly green, zero-waste leaching agent for copper.

近年来的研究表明，谷氨酸钠有潜力在碱性条件下作为从氧化物和金属中提取铜的浸出剂，但缺乏对其在硫化铜-氧化铜混合矿石中的性能的研究。研究了该体系处理复杂铜精矿的适用性，以及铜在含氧碱性谷氨酸盐溶液中的浸出动力学。基于一系列谷氨酸钠浓度、溶解氧水平和温度，本工作评估了这些参数对从3个精矿样品中回收铜的影响。谷氨酸浓度、温度和溶解氧水平的增加增加了浸出率，在最佳条件下（0.5 M谷氨酸、60°C、溶解氧15-20 ppm）， 12 h后可从精矿A和B中提取高达90%的铜。根据收缩核模型进行的动力学分析表明，铜的溶解主要是混合控制的，在较高温度下，通过产物层的扩散变得越来越重要。各精矿的活化能计算值与部分化学和部分扩散控制的机制一致，也与黄铜矿为主精矿的缓慢浸出行为一致。这些浸出结果表明，味精有潜力成为一种新型的、真正绿色的、零废物的铜浸出剂。

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引用次数: 0

Multiscale modeling of rock fracture in comminution — A comparative study of FEM accuracy and DEM scalability 粉碎过程中岩石断裂的多尺度建模——FEM精度与DEM可扩展性的比较研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-24 DOI: 10.1016/j.mineng.2025.109488

Laura Suarez , Vedad Tojaga , Erik Olsson , Adam Bilock , Magnus Evertsson , Jörgen Kajberg , Johannes Quist

The growing global demand for minerals and metals, coupled with the need for improved energy and water efficiency in resource extraction, has led to the use of numerical modeling, particularly the discrete element method (DEM), to evaluate and optimize comminution processes that account for a significant portion of the energy consumption in mineral and metal extraction. Despite advancements, a significant challenge remains in balancing the local resolution of fractures at the rock particle level, where physics-based material models using the finite element method (FEM) have excelled, with the resolution of industrial-scale total particle interactions within the machine system. This work explores the high-resolution fracture of rock particles using an established material model implemented within FEM as a valuable reference for fractures with a balanced mid-level resolution achieved through a bonded discrete element method applicable to industrial-scale systems. Brazilian tests were performed on two rock types to calibrate the models. Single particle breakage (SPB) experiments employing digital image correlation (DIC) were conducted to evaluate the performance of the models. Finally, the DEM model was demonstrated in an industrial-scale cone crusher application. The results show good agreement for the highly resolved FEM approach (requiring only two material parameters to be determined, which is particularly advantageous for generating virtual particle breakage data across various rock materials, shapes, and sizes) and reasonable agreement for the DEM fracture response, which is attributed to the much coarser mesh used that does not capture the crumbling mechanism (as revealed by the comparison between the two numerical approaches). Despite these discrepancies, the cone crusher predictions fall within the expected ranges for the system response at the machine level.

全球对矿物和金属的需求不断增长，加上在资源开采中需要提高能源和水的效率，导致使用数值模拟，特别是离散元方法（DEM）来评估和优化占矿物和金属开采能源消耗很大一部分的粉碎过程。尽管取得了进步，但在岩石颗粒水平上平衡裂缝的局部分辨率仍然是一个重大挑战，其中使用有限元方法（FEM）的基于物理的材料模型在机器系统内的工业规模总颗粒相互作用的分辨率方面表现出色。本研究使用在FEM中实现的已建立的材料模型来探索岩石颗粒的高分辨率裂缝，作为通过适用于工业规模系统的粘合离散元方法实现平衡中等分辨率裂缝的有价值参考。巴西对两种岩石类型进行了测试，以校准模型。采用数字图像相关（DIC）技术进行了单颗粒破碎（SPB）实验，对模型的性能进行了评价。最后，在工业规模的圆锥破碎机中对该模型进行了验证。结果表明，高分辨率的FEM方法（只需要确定两个材料参数，这对于生成各种岩石材料、形状和尺寸的虚拟颗粒破碎数据特别有利）和DEM断裂响应的一致性很好，这归因于使用了更粗糙的网格，无法捕捉破碎机制（如两种数值方法之间的比较所揭示的那样）。尽管存在这些差异，圆锥破碎机的预测落在机器水平的系统响应的预期范围内。

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引用次数: 0

Eco-friendly sophorolipid enabling the selective and efficient flotation separation of ilmenite from titanaugite 生态友好型槐脂使钛辉矿与钛辉矿的浮选分离具有选择性和高效率

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-24 DOI: 10.1016/j.mineng.2025.109567

Jihua Zhai , Pan Chen , Hongbin Wang , Yaohui Yang , Changping Guan

Ilmenite and titanaugite share similar surface chemistry and their selective separation presents challenges as conventional fatty acid-based collectors have several drawbacks. In this work, bio-based sophorolipid was assessed as an eco-friendly collector for selectively separating ilmenite from titanaugite. The results indicated sophorolipid can realize a faster and more efficient recovery of ilmenite than sodium oleate. The ideal pH range for ilmenite flotation was found to be between 6 and 8, with a maximum recovery of ∼95 % achieved at a sophorolipid dosage of 1 × 10^-4 mol/L. The critical micelle concentration of sophorolipid (1.6 × 10^-4 mol/L) was approximately one order of magnitude lower than that of sodium oleate (1 × 10^-3 mol/L), indicating that sophorolipid required a lower concentration to achieve effective surface coverage and create a hydrophobic ilmenite surface. Additionally, atomic force microscope observations revealed much thicker hydrophobic ilmenite interface when using sophorolipid as the collector, compared to sodium oleate, thus supporting a better ilmenite floatability. X-ray photoelectron spectroscopy, zeta potential, Fourier transform infrared spectroscopy and Raman measurements revealed that the negatively charged sophorolipid species adsorbed onto ilmenite surface and altered its electrokinetic property. Both iron and titanium present on the ilmenite surface acted as bonding sites for sophorolipid chemical adsorption. Moreover, the standard free energy for sophorolipid adsorption was the lowest at pH = 6, leading to increased adsorption of sophorolipid species onto ilmenite surface.

钛铁矿和钛辉矿具有相似的表面化学性质，它们的选择性分离面临挑战，因为传统的脂肪酸基捕收剂存在一些缺点。在这项工作中，生物基皂荚脂被评估为一种生态友好的捕收剂，用于选择性分离钛铁矿和钛辉矿。结果表明，槐脂比油酸钠能更快、更有效地回收钛铁矿。结果表明，钛铁矿浮选的理想pH范围为6 ~ 8，当槐脂用量为1 × 10-4 mol/L时，钛铁矿浮选回收率最高可达95%。槐脂的临界胶束浓度（1.6 × 10-4 mol/L）比油酸钠的临界胶束浓度（1 × 10-3 mol/L）约低一个数量级，表明槐脂需要较低的浓度才能实现有效的表面覆盖并形成疏水钛矿表面。此外，原子力显微镜观察显示，与油酸钠相比，槐脂作为捕收剂时，疏水钛铁矿界面更厚，从而支持更好的钛铁矿可浮性。x射线光电子能谱、zeta电位、傅里叶变换红外光谱和拉曼测量结果表明，带负电荷的槐脂类吸附在钛铁矿表面，改变了钛铁矿的电动力学性质。钛铁矿表面的铁和钛都是槐脂化学吸附的键合位点。此外，在pH = 6时，槐脂类吸附的标准自由能最低，导致槐脂类在钛铁矿表面的吸附增加。

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引用次数: 0

High pressure dewatering rolls Mark-II: A novel dewatering technology for mineral tailings 高压脱水辊Mark-II：一种新型的尾矿脱水技术

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-24 DOI: 10.1016/j.mineng.2025.109552

Sajid Hassan, Raul Cavalida, Nilanka I.K. Ekanayake, Peter J. Scales, Robin J. Batterham, Anthony D. Stickland

High Pressure Dewatering Rolls (HPDR) is a continuous, high pressure, cloth-less filter designed to improve solid–liquid separation. The Mark-I prototype demonstrated cake solid concentrations comparable to those of conventional filter presses during trials with various industrial suspensions. A further development (HPDR Mk-II) is described here. It is designed for mineral tailings, features a larger filtration area, improved handling of fine particles using 30 µm wedge wires as the filter surface, and the potential for cost reductions in achieving low moisture content.

This study overviews the design, proof of concept (phase 1) and safe and continuous steady state operation (phase 2) of the device. Phase 1 demonstrated operation using both flocculated and non-flocculated copper tailings (D[3,2] = 5.84 µm) and phase 2 showcases operation in runs up to one hour with nickel tailings (D[3,2] = 9.33 µm) under varying conditions. Thorough material characterisation of the tailings was conducted for benchmarking purposes. The HPDR achieved filter cake moisture contents of 83.1 wt% for copper and 87.9 wt% for nickel tailings, with a maximum specific solids throughput of 302 kg/m².hr for nickel and 73 kg/m².hr for copper. The cake moisture and specific throughput were comparable to or better than filter press performance, but with the advantages of continuous, cloth-less operation.

高压脱水辊（HPDR）是一种连续，高压，无布过滤器，旨在提高固液分离。在各种工业悬浮液的试验中，Mark-I原型机展示了与传统压滤机相当的饼固体浓度。这里描述了进一步的发展（HPDR Mk-II）。它专为矿物尾矿设计，具有更大的过滤面积，使用30µm楔形线作为过滤表面改善了对细颗粒的处理，并且在实现低水分含量方面具有降低成本的潜力。本研究概述了该设备的设计、概念验证（第一阶段）和安全连续稳态运行（第二阶段）。第一阶段演示了使用絮凝和非絮凝铜尾矿（D[3,2] = 5.84µm）的操作，第二阶段展示了在不同条件下使用镍尾矿（D[3,2] = 9.33µm）运行长达一小时的操作。对尾矿进行了全面的材料表征，以达到基准目的。HPDR滤饼中铜的含水率为83.1 wt%，镍的含水率为87.9%，最大比固体吞吐量为302 kg/m2。镍为Hr， 73 kg/m2。Hr代表铜。滤饼含水率和比吞吐量与压滤机性能相当或优于压滤机，但具有连续、无布操作的优点。

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引用次数: 0

Study on coal-based solid state reduction of Panzhihua ilmenite 攀枝花钛铁矿煤基固态还原研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-23 DOI: 10.1016/j.mineng.2025.109537

Wu Pengsen , He Benliu , Chen Jianli , Zhang Yurong , Du Jingwei , Muhammad Moeen , Gong Junju , Guo Yufeng , Qiu Guanzhou

The coal-based solid-state reduction of ilmenite is a fundamental and common pretreatment process in the titanium industry. Investigating the mechanism of coal-based solid-state reduction of ilmenite elucidates Fe/Ti separation and phase transformation, providing theoretical guidance for preparing Ti-rich materials from reduced ilmenite, optimizing processes, and enhancing TiO₂ grade, with significant implications. Firstly, the pre-oxidation experiment of Panzhihua ilmenite was carried out, and then the solid state reduction experiment and pre-oxidation of Ilmenite was carried out by using bituminous coal at 800 ℃−1150 ℃, and the relevant characterization analysis of the test samples was carried out. The results show that the pre-oxidation treatment can destroy the compact structure of ilmenite, which is beneficial to the reduction of ilmenite. Many pores are produced in the reduced ilmenite due to the formation of many metallic iron. The enrichment of MgO and MnO in the reduction process of ilmenite hinders the further reduction of FeO; during the ilmenite reduction, the honeycomb-like rutile (TiO₂) phase develops, and the reduction temperature has a significant effect on the content of rutile phase. When the reduction temperature does not exceed 1000 ℃, the content of rutile increases with reduction temperature increasing. However, when the reduction temperature exceeds 1000 ℃, rutile transforms into low-valent titanium oxide.

钛铁矿煤基固态还原是钛工业中最基本、最常用的预处理工艺。研究钛铁矿煤基固态还原机理，阐明Fe/Ti分离与相变，为还原钛铁矿制备富钛材料、优化工艺、提高TiO2品位提供理论指导，具有重要意义。首先对攀枝花钛铁矿进行预氧化实验，然后利用烟煤在800℃~ 1150℃对钛铁矿进行固相还原实验和预氧化，并对测试样品进行相关表征分析。结果表明：预氧化处理可以破坏钛铁矿的致密结构，有利于钛铁矿的还原。由于大量金属铁的形成，还原钛铁矿中产生了许多孔隙。钛铁矿还原过程中MgO和MnO的富集阻碍了FeO的进一步还原；钛铁矿还原过程中，形成蜂窝状金红石（TiO2）相，还原温度对金红石相含量有显著影响。当还原温度不超过1000℃时，金红石含量随还原温度的升高而升高。而当还原温度超过1000℃时，金红石转变为低价氧化钛。

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引用次数: 0

Alkaline leaching of phosphorous from poultry manure ash 家禽粪便灰中磷的碱性浸出

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-23 DOI: 10.1016/j.mineng.2025.109529

Yashwanth Ramesh , Ganesh Pilla , Jo Van Caneghem , Giuseppe Granata

Phosphorous (P) is an essential element for all living organisms and predominantly serves as a vital component in phosphate fertilizers pivotal for agricultural purposes. With the projected depletion of phosphate rocks reserves within the next century, the quest for alternative phosphorous source is necessary. Poultry manure ash emerges as a promising substitute, offering a potential solution to mitigate future phosphorous demands. This study investigates the extraction of phosphorous from poultry manure ash via alkaline leaching with sodium hydroxide (NaOH). Factorial experimental designs and analysis of variance (ANOVA) were applied to investigate the impact of concentration, temperature, and their interactions on phosphorous extraction yield. The leaching mechanism was studied by coupling an extensive kinetic analysis with XRD and SEM-EDX of the solid residues. Alkaline leaching extracts maximum 60 % of P in 8 h when working at high concentration (10 M) and high temperature (75 °C) on the ash with the original particle size distribution. The NaOH concentration was the factor most affecting the P extraction yield. The extraction of P was found to be limited by diffusional kinetic control and re-precipitation of phosphorous with the calcium contained in the ash. The first hindering effect can be reduced by leaching smaller size fractions of the ash, thus increasing the extraction up 70 %. The activation energy of alkaline leaching was found to be 41.11–60.98 kJ/mol in the size range 500–160 μm while the reaction was found to proceed under enthalpic driving force. While alkaline leaching demonstrates high selectivity for phosphorus, challenges related to limited extraction efficiency still need to be addressed.

磷(P)是所有生物的基本元素，主要是磷肥的重要成分，对农业用途至关重要。由于预计下个世纪磷矿储量将耗尽，寻找替代磷源是必要的。禽粪灰作为一种很有前途的替代品，为减轻未来对磷的需求提供了潜在的解决方案。研究了用氢氧化钠（NaOH）碱浸法从禽粪灰中提取磷。采用因子试验设计和方差分析（ANOVA）研究了浓度、温度及其相互作用对磷提取率的影响。通过对固体残留物的XRD和SEM-EDX进行广泛的动力学分析，研究了浸出机理。在高浓度（10 M）、高温（75℃）条件下，碱浸对粒径分布不变的灰料进行碱性浸出，8 h可最大提取60%的磷。NaOH浓度是影响P提取率的主要因素。磷的提取受到扩散动力学控制和灰分中钙与磷的再沉淀的限制。通过浸出更小粒度的灰分，可以减少第一次阻碍效应，从而使提取率提高70%。在500 ~ 160 μm范围内，碱浸反应的活化能为41.11 ~ 60.98 kJ/mol，反应在焓驱动下进行。虽然碱性浸出对磷具有高选择性，但与萃取效率有限有关的挑战仍有待解决。

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引用次数: 0

Recovery of strategically important critical minerals using novel co-collectors: Insights from a Central African copper ore using integration of particle-based separation modelling and flotation chemistry 利用新型共捕收剂回收具有重要战略意义的关键矿物：利用基于颗粒的分离模型和浮选化学的整合从中非铜矿获得的见解

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-23 DOI: 10.1016/j.mineng.2025.109516

NJ Shackleton , V Malysiak , L Pereira , B Guy , GS Mosia

Copper has been highlighted as a critical mineral to mitigate climate change and provide clean-energy economy; however, major deficits are forecasted and therefore copper demand is expected to rise. This situation will become more severe if copper’s production continues at its current rate. Given the declining copper head grades as well as the long-time span needed for exploration of new sites, it has become necessary to improve the efficiency of existing beneficiation processes.

This paper focuses on copper’s flotation performance using novel co-collectors developed for improved extraction of various copper-bearing minerals and thus creating added value for concentrators treating base metal sulphide ores. The case study was conducted on a Central African ore, where batch flotation tests were performed and the concentrates were characterised with automated mineralogy, which data was used to train particle-based separation models. Results show a strong correlation between the recovery of the different copper minerals and AECI Mining Chemicals novel co-collector type thereby improving copper recovery even at a lower overall reagent consumption.

铜已被强调为减缓气候变化和提供清洁能源经济的关键矿物；然而，预计将出现重大赤字，因此铜需求预计将上升。如果铜的产量继续以目前的速度增长，这种情况将变得更加严重。鉴于铜头品位的下降以及勘探新地点所需的长时间跨度，有必要提高现有选矿工艺的效率。本文重点研究了新型共捕收剂对铜的浮选性能的影响，以改善各种含铜矿物的提取，从而为选厂处理贱金属硫化物矿石创造附加值。案例研究是在中非的一个矿石上进行的，在那里进行了批量浮选试验，并使用自动化矿物学对精矿进行了表征，这些数据用于训练基于颗粒的分离模型。结果表明，不同铜矿物的回收率与AECI矿业化学公司新型共捕收剂之间存在很强的相关性，从而提高了铜的回收率，即使在较低的总体试剂消耗下。

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引用次数: 0

New insight into effect of cation bridging on the differential bonding mechanism of sodium carboxymethyl starch in molybdenite-talc separation 阳离子桥接对羧甲基淀粉钠在辉钼矿-滑石分离中差异键合机制影响的新认识

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-22 DOI: 10.1016/j.mineng.2025.109532

Zechao Huangfu, Wei Sun, Chen Chen, Runqing Liu

The selective depression of talcose molybdenum ores has always been a pressing problem in the physical chemistry of flotation. Herein, aluminum ion was introduced to investigated its effect on the selective depression of sodium carboxymethyl starch (CMS) on molybdenite-talc separation. The micro-flotation experiments shows that the combination of CMS and aluminum ion exerts a synergistic depression in low alkaline environments and exhibits strong affinity on the talc. Fourier transform infrared spectroscopy (FTIR), adsorption isotherm, X-ray photoelectron spectroscopy (XPS) and Time-of-flight secondary ion mass spectrometry (TOF-SIMS) illustrate that aluminum ions act as a metal bridge to change the adsorption configuration as well as the adsorption strength of CMS. The primary factors influencing the adsorption of aluminum ion cross-linked with CMS (CMS-Al complex) on the molybdenite surface are electrostatic force, hydrophobic interaction and hydrogen bond, and sodium diethyldithiocarbamate (DDTC) can effectively accelerate its desorption. While CMS-Al complex has a stronger affinity on talc by hydrogen bonding and chemical interaction, which is not affected by DDTC. Differences in the adsorption affinities of DDTC and CMS-Al complex on the molybdenite and talc is another non-negligible factor in realizing the efficient molybdenite-talc separation.

滑石钼矿石的选择性抑制一直是浮选物理化学领域亟待解决的问题。本文研究了铝离子对羧甲基淀粉钠（CMS）选择性抑制辉钼矿与滑石分离的影响。微浮选实验表明，在低碱性环境下，CMS与铝离子的结合对滑石具有协同抑制作用，对滑石具有较强的亲和性。傅里叶变换红外光谱（FTIR）、吸附等温线、x射线光电子能谱（XPS）和飞行时间二次离子质谱（TOF-SIMS）分析表明，铝离子作为金属桥梁改变了CMS的吸附构型和吸附强度。影响交联铝离子与CMS （CMS- al配合物）在辉钼矿表面吸附的主要因素是静电力、疏水相互作用和氢键，二乙基二硫代氨基甲酸钠（DDTC）能有效加速其解吸。而CMS-Al配合物通过氢键和化学相互作用对滑石具有较强的亲和力，不受DDTC的影响。DDTC和CMS-Al配合物对辉钼矿和滑石的吸附亲合力的差异是实现辉钼矿和滑石高效分离的另一个不可忽视的因素。

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引用次数: 0

Hydrophobic agglomeration of different types of collectors in the separation of fine tenorite from quartz 不同类型捕收剂在细粒橄榄石与石英分离中的疏水团聚

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-21 DOI: 10.1016/j.mineng.2025.109539

Qiurong Long , Qiang He , Weiyong Cui , Yangge Zhu

Sodium dodecyl sulfate (SDS), sodium oleate (NaOL), sodium octyl hydroxamate (OHA), heptyl triazine thione (HpNT) and hexyl tetrathione (HTT) − characterized by different hydrophobic groups and polar functional groups − were investigated for their effects on hydrophobic aggregation during the separation of fine tenorite from quartz. The findings showed that the hydrophobicity of the tenorite surface was significantly enhanced after treatment with these collectors. This observation was subsequently validated through flotation experiments, which revealed that these collectors exhibited favorable selectivity in the separation of fine tenorite from quartz, and the tenorite recovery ranked as followed: NaOL > SDS > HpNT > OHA > HTT. Zeta potential studies showed that the negative potential value of tenorite surfaces treatment with NaOL and SDS was higher than those treatment with the other three collectors. Furthermore, the results obtained by focused beam reflectance measurement (FBRM) confirmed that the agglomeration behavior of fine tenorite was influenced not only by hydrophobic groups but also by polar head groups. Notably, SDS and NaOL facilitated more efficient hydrophobic aggregation of tenorite, thereby increasing the apparent particle size of tenorite.

研究了十二烷基硫酸钠（SDS）、油酸钠（NaOL）、辛烷基羟酸钠（OHA）、庚基三嗪硫酮（HpNT）和己基四硫酮(HTT) -具有不同疏水基团和极性官能团特征-在细粒钛矿与石英分离过程中对疏水聚集的影响。结果表明，经这些捕收剂处理后，钛酸盐表面的疏水性显著增强。随后通过浮选实验验证了这一观察结果，结果表明，这些捕收剂对细粒橄榄石与石英的分离具有良好的选择性，橄榄石的回收率依次为：NaOL >；SDS祝辞HpNT祝辞OHA祝辞计画。Zeta电位研究表明，NaOL和SDS处理的表面负电位值高于其他3种捕收剂处理的表面负电位值。此外，通过聚焦束反射测量（FBRM）得到的结果证实，细粒尖晶石的团聚行为不仅受到疏水性基团的影响，还受到极性头基团的影响。值得注意的是，SDS和NaOL促进了更有效的tenorite疏水聚集，从而增加了tenorite的表观粒径。

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引用次数: 0

Research on recognition method of liner wear stage based on operation and vibration information of semi-autogenous mil 基于半自磨机运行和振动信息的衬套磨损阶段识别方法研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-06-21 DOI: 10.1016/j.mineng.2025.109531

TianQing Li , Dakuo He , Shuiqing Yu

The wear stage of the liner is of great significance to the production and maintenance of the mill. However, it is difficult to monitor the wear stage of the liner in real time. Therefore, this study developed a method to recognize the wear stage of semi-autogenous(SAG) mill liner on line. The pulp density is an important characteristic variable for reflecting liner wear stage. In view of the difficulty of on-line detection, this paper presents a method to calculate the pulp density of SAG mill under the condition that the product fineness index is qualified and the filling level of the internal grinding medium(steel ball) is stable. On account of the characteristics of nonlinear and non-stable significant changes in mill vibration information, this paper uses mode decomposition method(EMD, VMD) and principal component analysis (PCA) method to screen and reduce for the important vibration modal characteristics. Combined with the important operating parameters of the mill (feed ore and water), multiple groups of deep learning algorithms based on the recognition model of liner wear stage are established. In response to the actual need to recognize the stage of severe liner wear, an accurate recognition method of critical interval of liner wear stage is proposed to achieve accurate recognition of severe wear stage of liner based on the performance analysis results of several liner wear stage recognition models.

衬板磨损阶段对磨机的生产和维修具有重要意义。然而，对尾管的磨损阶段进行实时监测是很困难的。为此，本研究提出了一种在线识别半自磨衬板磨损阶段的方法。浆料密度是反映衬板磨损阶段的重要特征变量。针对在线检测困难的问题，提出了在产品细度指标合格、内磨介质（钢球）填充水平稳定的情况下，SAG磨浆密度的计算方法。针对磨机振动信息非线性、非稳态显著变化的特点，采用模态分解法（EMD、VMD）和主成分分析法（PCA）对重要的振动模态特征进行筛选和降阶。结合磨机的重要运行参数（给矿和给水），建立了基于衬板磨损阶段识别模型的多组深度学习算法。针对识别衬板严重磨损阶段的实际需要，在几种衬板磨损阶段识别模型的性能分析结果的基础上，提出了一种衬板磨损阶段临界区间的准确识别方法，实现对衬板严重磨损阶段的准确识别。

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