Advanced Powder Technology最新文献

{"title":"Depression mechanism of a novel environment-friendly depressant konjac gum in flotation separation of chalcopyrite and sphalerite","authors":"Tichen Wang ,&nbsp;Jiushuai Deng ,&nbsp;Yijun Cao ,&nbsp;Qin qizheng ,&nbsp;Chen Zhang ,&nbsp;Yue Gao","doi":"10.1016/j.apt.2025.104989","DOIUrl":"10.1016/j.apt.2025.104989","url":null,"abstract":"<div><div>Conventional inorganic depressants are widely used in the flotation separation of chalcopyrite and sphalerite. However, their widespread use entails some inevitable disadvantages, such as environmental hazards, waste generation, and additional costs. In this work, Konjac gum (KG) was investigated as a non-toxic and eco-friendly sphalerite depressant in the flotation separation of chalcopyrite and sphalerite. Micro-flotation and artificial mixed mineral experiments suggested that the addition of KG dramatically depressed the floatability of sphalerite while having a negligible depressive effect on chalcopyrite at pH = 7. Wettability measurements, Zeta potential measurements, adsorption measurements and interaction energy calculations showed that KG have a stronger affinity to sphalerite rather than chalcopyrite, preventing the adsorption of collector on sphalerite surface. FTIR and XPS measurements demonstrated that KG could interact with sphalerite and change the chemical environment of oxygen atoms on sphalerite surface. The Bronsted acid-base interaction, hydrogen bonding, and the attraction between the hydrophobic sections of KG and sphalerite surface were considered as the potential mechanisms in the adsorption of KG on sphalerite.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 104989"},"PeriodicalIF":4.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672620","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}

{"title":"Non-toxic and biodegradable depressant Gum Arabic for flotation separation of calcite and magnesite: Experiments and MD simulations","authors":"Dingquan Xing ,&nbsp;Tingting Hu ,&nbsp;Ticheng Wang ,&nbsp;Jiushaui Deng ,&nbsp;Yanyan Diao ,&nbsp;Tianyu Cheng ,&nbsp;Jiahong Han ,&nbsp;Youyuan Yang","doi":"10.1016/j.apt.2025.104992","DOIUrl":"10.1016/j.apt.2025.104992","url":null,"abstract":"<div><div>In this study, Gum arabic (GA), a green, environmentally friendly, and biodegradable organic macromolecule reagent, is employed as a novel depressant for the reverse flotation separation of magnesite and calcite. The micro-flotation tests demonstrate that GA exhibits a selective depression impact on magnesite. From artificial mixed minerals, a concentrate with a MgO grade of 31.39 % and a MgO recovery of 80.31 % can be obtained using 70 mg/L of GA. The mechanism studies reveal that GA adsorbs on the magnesite surface mainly via chemical chelation between Mg sites on the magnesite surface and hydroxyl and carboxyl groups on GA, while it mainly adsorbs through hydrogen bonding on the calcite surface. After adding NaOL, it can further adsorb on the calcite surface, while its adsorption on magnesite is more difficult. Moreover, the spatial distribution of water molecules and the radial distribution function (RDF) provides microscopic proof that GA can expand the differences in hydrophobicity between magnesite and calcite surfaces. Eventually, the difference in the floatability of the two minerals increases significantly. Therefore, GA can be adopted as a novel and highly selective depressant for the reverse flotation separation of magnesite.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 104992"},"PeriodicalIF":4.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679245","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}

{"title":"The assessment of the influence of interaction forces on heat transfer and pressure drop using Eulerian-Lagrangian model with various particle collision approaches","authors":"Muhammad M. Generous ,&nbsp;Eiyad Abu-Nada ,&nbsp;Anas Alazzam","doi":"10.1016/j.apt.2025.105006","DOIUrl":"10.1016/j.apt.2025.105006","url":null,"abstract":"<div><div>This study investigates the impact of critical forces—including linear and rotational drag, gravity, Saffman’s lift, thermophoretic, Brownian, virtual mass, Magnus, pressure, and particle collisions—on pressure drop and the average wall Nusselt number in particle-laden flows using a validated Eulerian-Lagrangian model. The analysis covers a particle Reynolds number range of <span><math><mrow><mn>0.4</mn><mo>&lt;</mo><mi>R</mi><msub><mi>e</mi><mi>p</mi></msub><mo>&lt;</mo><mn>1.75</mn></mrow></math></span> and evaluates four particle interaction models: linear spring, spring-dashpot, Hertzian, and Hertzian-dashpot. Model validation is conducted against benchmark cases, including particle sedimentation, the Segre-Silberberg effect, drafting-kissing-tumbling, Brownian motion (assessed via mean square displacement and diffusion profiles), and the transient thermal response of spherical particles. Heavy (2702 kg/m³) and light particles (500 kg/m³) are studied under gravity directed downward (horizontal channel) and against the flow (vertical channel). The findings reveal that linear and rotational drag are the primary contributors to pressure drop, with their omission resulting in increased Nusselt numbers across all scenarios. Excluding other forces, particularly Saffman’s lift and Magnus, causes moderate reductions in the Nusselt number. The study advocates for the use of spring-dashpot and Hertzian-dashpot models at higher mass flow rates to capture energy dissipation accurately, preventing Nusselt number overestimations of 0.54 %–1.1 % for particle mass flow rates between 0.01 and 0.1 g/s.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105006"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634587","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}

{"title":"Inside Front Cover (Aims & Scope, Editors)","authors":"","doi":"10.1016/S0921-8831(25)00217-1","DOIUrl":"10.1016/S0921-8831(25)00217-1","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104996"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633797","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}

{"title":"Full title (Editorial Board Members)","authors":"","doi":"10.1016/S0921-8831(25)00218-3","DOIUrl":"10.1016/S0921-8831(25)00218-3","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104997"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633798","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}

{"title":"CFD-DEM study on circulation pattern and particle suspension dynamics in PBT solid–liquid stirred tank","authors":"Zhichen Bi,&nbsp;Shiliang Yang,&nbsp;Jianhang Hu,&nbsp;Hua Wang","doi":"10.1016/j.apt.2025.104993","DOIUrl":"10.1016/j.apt.2025.104993","url":null,"abstract":"<div><div>The stirred tank is widely used in industrial processes for efficient material mixing. In this work, a multi-scale numerical model suitable for dense particle flow is established based on the CFD-DEM approach. After verifying the reliability of the model by comparing with experiments, the solid–liquid two-phase behaviors in a single-layer unbaffled pitched blade turbine (PBT) stirred tank under transitional flow regime are investigated at different stirring speeds. The chain effect of stirring speed- discharge stream-suspension dynamics and the hindering mechanism of isolated mixing zone in solid–liquid system are revealed. Results show that the discharge stream caused by the pitched blades, which is directly affected by the stirring speed dominates the formation of two main circulation structures and the isolated mixing regions (IMRs). Notably, when the stirring speed exceeds a threshold, which lies between 350 rpm and 450 rpm, the enhancement of suspension is significantly diminished. To elucidate the underlying mechanism responsible for this phenomenon in the transitional flow regime, this study employs a multi-scale and multi-physics analysis. The outcomes of this study present insights into solid–liquid flow dynamics and provide a theoretical basis for optimizing stirred tank performance.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 104993"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656704","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}

{"title":"Efficient Monte Carlo simulations of coagulation based on weighted particle strategies","authors":"Yongjie Chen ,&nbsp;Muhao Chen ,&nbsp;Xi Xia ,&nbsp;James C. Hermanson ,&nbsp;Fei Qi","doi":"10.1016/j.apt.2025.105004","DOIUrl":"10.1016/j.apt.2025.105004","url":null,"abstract":"<div><div>In this paper, a class of efficient Monte Carlo methods based on weighted particle strategies for solving the coagulation population balance equation is presented. The adjustable coagulation resolution strategy is developed from probabilistic coagulation theories for general conditions. The particle reconstruction scheme accelerates simulations and reduces errors. Three components of the methods have been verified and validated against several benchmark coagulation scenarios with analytical solutions and a conventional constant-number method. The two methods, using stepwise-constant and size-dependent coagulation resolution, offer superior performance to the constant-number method in resolving regions with large and rare particles and higher-order moments without sacrificing computational efficiency. Moreover, the computation precision of both methods is significantly higher than the conventional methods, as the proposed method’s precision is proportional to the square root of the total number of coagulation events rather than being dependent on the computational particle number used by conventional methods.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105004"},"PeriodicalIF":4.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634594","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}

{"title":"Influence of corrugation geometry on sand-structure interface behavior","authors":"Aleksander Grabowski,&nbsp;Arkadiusz Jenta,&nbsp;Jakub Konkol,&nbsp;Michał Wójcik,&nbsp;Michał Nitka","doi":"10.1016/j.apt.2025.104988","DOIUrl":"10.1016/j.apt.2025.104988","url":null,"abstract":"<div><div>This paper presents laboratory investigations on the interface between sand and a sinusoidal corrugated surface under a constant normal load using a direct shear apparatus. Using 3D printing technology, a custom direct shear box was fabricated, enabling the construction of various corrugated surface topographies. It was shown that parts produced by FFF (Fused Filament Fabrication) method successfully replicated the properties of traditional metal components in the direct shear box. A series of interface shearing experiments was conducted using different sinusoidal corrugated surfaces. The relationship between the corrugation coefficient, <span><math><mrow><mi>d</mi><mo>/</mo><mi>l</mi></mrow></math></span> (where <em>d</em> represents wave depth and <em>l</em> represents wavelength), and the shear resistance of the interface was evaluated. Findings revealed that as the corrugation coefficient increased, the forces exerted on the surface and the volumetric changes also increase. Force measurements provided a friction coefficient against the surface, ranging from 0.335 to 0.883. The micro-behavior of the shear zone was analyzed using Digital Image Correlation (DIC), which enabled a qualitative description of failure mechanisms for various surfaces. For surfaces with low-corrugated, direct sliding of the material along the surface was observed, whereas for high-corrugated surfaces, the shear plane appeared above the corrugation valleys, within the material, and at the corrugation peaks. A critical corrugation coefficient, ranging from 0.053 to 0.147, was identified as the threshold between low-corrugated and high-corrugated interfaces. Based on the DIC analysis, the thickness of the shear zone was determined, ranging from 4<span><math><mrow><mo>×</mo></mrow></math></span><span><math><mrow><msub><mrow><mi>d</mi></mrow><mrow><mn>50</mn></mrow></msub></mrow></math></span> to 5<span><math><mrow><mo>×</mo></mrow></math></span><span><math><mrow><msub><mrow><mi>d</mi></mrow><mrow><mn>50</mn></mrow></msub></mrow></math></span>. Finally, this research provides valuable insights into the micro-behavior of the interface between granular material and sinusoidal corrugated surfaces.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 104988"},"PeriodicalIF":4.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144613917","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}

{"title":"Enhancing granular mixing performance in static mixer with wedge-block blending elements","authors":"Rui Tan ,&nbsp;Bei Wu ,&nbsp;Huaiyuan Qian ,&nbsp;Yusong Xie ,&nbsp;Bojun Cao ,&nbsp;Dawei Liu ,&nbsp;Xu Li ,&nbsp;Fangping Xie","doi":"10.1016/j.apt.2025.105005","DOIUrl":"10.1016/j.apt.2025.105005","url":null,"abstract":"<div><div>The static mixer captures immense attention as an efficient, energy-saving and low-cost device for mixing grain particles, which plays a critical role in improving food nutrition, tastes and cooking styles. This study pursues better performance of static mixer, and adopted the discrete element method to establish a particle-blanking mixing model for mung beans and brown rice. A self-designed wedge-block continuous collision static mixer was compared with the Kenics and the Low Pressure Drop (LPD) static mixers, and a bench test was carried out to evaluate the particle mixing of the three mixers. The results manifest that, in terms of mixing efficiency, the average flow rates of Kenics, LPD and wedge-block static mixers were 0.33 kg/s, 0.22 kg/s and 0.43 kg/s in the simulation, compared to 0.35 kg/s, 0.27 kg/s and 0.51 kg/s in the bench test, respectively. As for mixing uniformity, the relative standard deviation (RSD) values for Kenics, LPD and wedge-block static mixers were 24.95 %, 21.87 % and 7.44 % in the simulation, and 30.34 %, 35.93 % and 9.64 % in the bench test, respectively. In summary, the proposed wedge-block static mixer, able to boost the mixing rate and quality, is an ideal choice for the continuous production of pellet mixing, thanks to its superior mixing performance than Kenics and LPD in mixing mung bean and brown rice. These findings lay an essential basis for optimizing granular static mixer in the future.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105005"},"PeriodicalIF":4.2,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604848","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}

{"title":"Improved degradation of acetaminophen with NiO-TiO2 nanofibers synthesized through atomic layer deposition","authors":"Mahmoud Abid ,&nbsp;Tia Maria Howayek ,&nbsp;Olga Mazur ,&nbsp;Roman Viter ,&nbsp;Clémence Badie ,&nbsp;Zahraa El Charif ,&nbsp;Amr A. Nada ,&nbsp;Djamel Bezzerga ,&nbsp;Jisang Hong ,&nbsp;Lionel Santinacci ,&nbsp;Philippe Miele ,&nbsp;Igor Iatsunskyi ,&nbsp;Emerson Coy ,&nbsp;Geoffroy Lesage ,&nbsp;Roland Habchi ,&nbsp;David Cornu ,&nbsp;Mikhael Bechelany","doi":"10.1016/j.apt.2025.104991","DOIUrl":"10.1016/j.apt.2025.104991","url":null,"abstract":"<div><div>Light-driven water treatment methods have garnered significant attention for their ability to effectively degrade harmful pollutants. In this study, polyvinylpyrrolidone (PVP)-based titanium dioxide nanofibers were synthesized using a sol–gel method combined with electrospinning, followed by calcination at 500 °C. Nickel oxide (NiO) layers of 5, 10, and 20 nm thickness were subsequently deposited onto the nanofibers via atomic layer deposition (ALD) using bis(ethylcyclopentadienyl)nickel and ozone as chemical precursors. The structural and functional properties of the fibers were characterized using electron microscopy, surface area analysis, and various spectroscopic techniques. The incorporation of NiO into TiO₂ nanofibers enhanced light absorption, suppressed charge recombination, and improved photocatalytic performance under visible light, as confirmed by reflectance and photoluminescence spectra. Photocatalytic tests demonstrated that fibers with 5 nm NiO exhibited superior performance, achieving 91 % degradation of acetaminophen under visible light within 4 h, compared to 70 % for bare TiO₂. Moreover, the 5 nm NiO-coated fibers maintained their performance over five cycles, with a slight reduction of 28 %. Reactive species analysis revealed the involvement of hydroxyl and superoxide radicals in the degradation process. Density functional theory (DFT) calculations further elucidated that the enhanced photocatalytic efficiency of the NiO (5 nm)-TiO₂ composite (denoted as N5T) stems from optimized electron-hole separation and improved photon energy retention. These findings highlight the potential of N5T nanofibers for water treatment applications and provide valuable insights for the development of advanced light-driven catalysts.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 104991"},"PeriodicalIF":4.2,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604849","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}