Advanced Powder Technology最新文献_第2页

Study on the surface modification and activation mechanism of lime-depressed pyrite by Cu(II) species

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-20 DOI: 10.1016/j.apt.2025.104831

Liang Wang , Yu Chen , Bihan Wei , Han Wang , Peilun Shen , Dianwen Liu

{"title":"Study on the surface modification and activation mechanism of lime-depressed pyrite by Cu(II) species","authors":"Liang Wang , Yu Chen , Bihan Wei , Han Wang , Peilun Shen , Dianwen Liu","doi":"10.1016/j.apt.2025.104831","DOIUrl":"10.1016/j.apt.2025.104831","url":null,"abstract":"<div><div>Pyrite is frequently encountered in conjunction with other sulfide minerals and is commonly subjected to depression by lime during mineral processing, which aim to isolate and concentrate precious minerals. In light of the continuous exhaustion of Earth’s mineral wealth, the retrieval of pyrite that has been hindered by lime deposits has emerged as a pressing concern and a top priority. This study explored the use of Cu(II) to activate lime-depressed pyrite. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) spectrophotometers, and contact angle tests were utilized to reveal the activation mechanism of Cu(II) on lime-depressed pyrite. These techniques were employed to analyze surface morphology and characteristics, spectral characteristics, adsorption capacity for collectors, and surface hydrophobicity. The surface morphology and spectral characteristics analyze indicated that the addition of Cu(II) led to the dissolution of hydroxyl and sulfate species on lime-depressed surfaces, and results in the formation of new copper sulfide and Fe-O-Cu species. These newly generated copper species enhanced the adsorption capacity of collectors on the pyrite surfaces, thus improving the hydrophobicity of pyrite. After Cu(II) treatment, the lime-depressed pyrite exhibited improved recoverability through flotation, ultimately achieving a peak recovery of 81.50%.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104831"},"PeriodicalIF":4.2,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445956","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

Oxidation and laser ignition characteristics of Mn, Mo, Ta, and W powders in oxygen-rich environments

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-19 DOI: 10.1016/j.apt.2025.104828

Xiangrui Zou , Chao Wang , Wenju Yang , Chaoqi Xu , Rui Xue

{"title":"Oxidation and laser ignition characteristics of Mn, Mo, Ta, and W powders in oxygen-rich environments","authors":"Xiangrui Zou , Chao Wang , Wenju Yang , Chaoqi Xu , Rui Xue","doi":"10.1016/j.apt.2025.104828","DOIUrl":"10.1016/j.apt.2025.104828","url":null,"abstract":"<div><div>Manganese (Mn), molybdenum (Mo), tantalum (Ta), and tungsten (W) powders offer exceptional properties such as high strength, combustibility, and substantial volumetric combustion enthalpy, making them valuable for aerospace and industrial applications. This study investigates their oxidation and burning characteristics through thermogravimetric-differential scanning calorimetry and high-pressure combustion tests. Onset oxidation temperatures were determined as 340.23 °C, 475.01 °C, 523.90 °C, and 535.70 °C for Mn, Mo, Ta, and W, respectively. Mn forms Mn<sub>2</sub>O<sub>3</sub> and Mn<sub>3</sub>O<sub>4</sub>, with combustion products exhibiting surface holes as substance migration channels. Mo and W form volatile oxides (MoO<sub>3</sub>, WO<sub>3</sub>) sublimating above 800 °C and 1200 °C, respectively, while Ta forms stable Ta<sub>2</sub>O<sub>5</sub>. Luminous intensity measurements quantified combustion evolution, revealing ignition delay times of 64 ms, 77.5 ms, 97.8 ms, and 128 ms for Mn, Mo, Ta, and W under 0.5 MPa oxygen, with Mn and Ta showing intense flames and faster reaction rates. Scanning electron microscope and X-ray diffraction analyses identified Mn<sub>3</sub>O<sub>4</sub>, MoO<sub>3</sub>, Ta<sub>2</sub>O<sub>5</sub>, and WO<sub>3</sub> as primary combustion products. This study provides insights into the oxidation and combustion behaviors of high-density metal powders, supporting improved safety in powder metallurgy, 3D printing, and energetic material design.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104828"},"PeriodicalIF":4.2,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438299","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

Milling-based extraction and characterization of Bombyx mori silk glands and fibroin powder for biomaterial use

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-16 DOI: 10.1016/j.apt.2025.104820

Norihiro Yoshida , Mayumi Tsukada , Masayuki Horio , Akio Nonaka , Akira Nonaka , I. Wuled Lenggoro

引用次数: 0

Particle tracking velocimetry study of wet particle flow in a pseudo two-dimensional fluidized bed

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-13 DOI: 10.1016/j.apt.2025.104819

Zhiyang Ma , Yi Xu , Qiuya Tu , Haigang Wang

{"title":"Particle tracking velocimetry study of wet particle flow in a pseudo two-dimensional fluidized bed","authors":"Zhiyang Ma , Yi Xu , Qiuya Tu , Haigang Wang","doi":"10.1016/j.apt.2025.104819","DOIUrl":"10.1016/j.apt.2025.104819","url":null,"abstract":"<div><div>In particle preparation, likes drying, coating and granulation, the flow characteristics of wet particles in the fluidized bed are extremely complex due to the effect of water content. It is essential to investigate the flow characteristics of wet particles for optimizing process efficiency and ensure the end-point product quality. In this research, a high-speed camera was employed to conduct experimental investigation for wet particles flow within a pseudo two-dimensional fluidized bed. The flow dynamics of wet particles under different water contents and different inlet gas velocities were investigated. The particle tracking velocimetry (PTV) measurement was explored to observe the particle movement in specific regions, including particle velocity distribution and particle concentration. A digital imaging method, i.e. Voronoi method, was utilized to address particle allocation challenges, providing a foundation for calculating intricate parameters such as solid-phase flow field, granular temperature and solid volume fraction. These parameters were calculated based on the essential information derived from the Lagrangian trajectories of particles, which enriched the understanding of complex interactions in the wet particle flow dynamics system.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104819"},"PeriodicalIF":4.2,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402677","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

Effect of oxalic acid on the selective flotation separation of Pb-activated sphalerite from galena

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-13 DOI: 10.1016/j.apt.2025.104818

Doaa Ashraf Eladl , Gde Pandhe Wisnu Suyantara , Hajime Miki , Akbarshokh Ulmaszoda , Naoko Okibe

{"title":"Effect of oxalic acid on the selective flotation separation of Pb-activated sphalerite from galena","authors":"Doaa Ashraf Eladl , Gde Pandhe Wisnu Suyantara , Hajime Miki , Akbarshokh Ulmaszoda , Naoko Okibe","doi":"10.1016/j.apt.2025.104818","DOIUrl":"10.1016/j.apt.2025.104818","url":null,"abstract":"<div><div>The separation of sphalerite (ZnS) and galena (PbS) is challenging owing to activation of the sphalerite surface by unavoidable metal ions, such as lead ions (Pb<sup>2+</sup>) released from lead-containing minerals. In this study, oxalic acid (OA) was applied for the first time as an environmentally friendly reagent to deactivate the sphalerite surface in lead–zinc (Pb-Zn) flotation separation. Micro-flotation experiments showed that OA, at a concentration of 0.56 mM, significantly reduced sphalerite recovery. Single-mineral flotation tests demonstrated that sphalerite recovery decreased to 20 %, while galena recovery remained at 58.7 % after OA treatment. Further flotation tests on an artificial mixture of sphalerite and galena confirmed effective separation with OA treatment under mildly alkaline conditions, achieving recoveries of 83 % for galena and 17 % for sphalerite. Infrared spectroscopy and X-ray photoelectron spectroscopy analyses showed that OA removes Pb<sup>2+</sup> ions from the surface of sphalerite by forming lead oxalate (Pb(II)-Ox) precipitates, which detach from the sphalerite surface, effectively cleaning it. This detachment prevents the adsorption of potassium amyl xanthate (PAX) by forming a dispersed lead oxalate-amyl xanthate (PbOx-AX) complex, which exposes the hydrophilic sphalerite surface and leads to its depression. In contrast, this interaction had a minimal impact on the floatability of galena.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104818"},"PeriodicalIF":4.2,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2024 reviewer appreciation

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-10 DOI: 10.1016/j.apt.2025.104808

引用次数: 0

Modification of ultrafine silk fibroin powder for efficient oil/water separation

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-08 DOI: 10.1016/j.apt.2025.104817

Jian Huang , Yunshan Mao , Yunli Wang , Weilin Xu

{"title":"Modification of ultrafine silk fibroin powder for efficient oil/water separation","authors":"Jian Huang , Yunshan Mao , Yunli Wang , Weilin Xu","doi":"10.1016/j.apt.2025.104817","DOIUrl":"10.1016/j.apt.2025.104817","url":null,"abstract":"<div><div>In this study, silk fibroin powder (SFP) was modified using silane coupling agent vinyltrimethoxysilane (KH 171) to produce hydrophobic particles with micro–nanostructure. A series of tests and analyses on the microstructure and properties of the SFP before and after the modification show that silane oligomer (PSO) nanoparticles are formed on the SFP after the modification with KH 171, reducing its surface energy and constructing micro–nanoscale rough structures. Moreover, the modified SFP can maintain a high hydrophobicity after long-term washing. The hydrophobic modification of SFP has no significant effect on its crystal structure, but markedly improves its thermal stability by introducing PSO nanoparticles. A comparative study was performed on the samples of original SFP, KH 171-modified SFP, PSO nanoparticles, and SFP + PSO mixture using FTIR, TGA, and contact angle measurements. The results provide compelling evidence from different perspectives that the PSO nanospheres, formed by the hydrolysis and condensation of KH 171, are covalently bonded to the SFP, not just simple physical adsorption. This system successfully separated several oil/water mixtures and water-in-oil emulsions, with separation efficiencies of 99.1 % and 99.95 %, respectively. This indicates that the hydrophobic modification of the SFP and its use as a material for oil/water separation have practical feasibility. This provides new concepts for the recovery and reuse of discarded silk fibers, expands the application fields of SFP, and has good application prospects.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104817"},"PeriodicalIF":4.2,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373017","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

Study the effect of 2D particle shape and size on angle of repose using a new detection algorithm

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.apt.2025.104804

Tao Liu, Xiulun Wang, Tingting Wu, Halidi Ally

{"title":"Study the effect of 2D particle shape and size on angle of repose using a new detection algorithm","authors":"Tao Liu, Xiulun Wang, Tingting Wu, Halidi Ally","doi":"10.1016/j.apt.2025.104804","DOIUrl":"10.1016/j.apt.2025.104804","url":null,"abstract":"<div><div>The angle of repose (AoR) is a critical parameter characterising the flowability and friction properties of granular materials. The objective of this paper is to develop an image-based method for calculating the angle of repose and to analyse the relationship between particle micro-shape and the macro accumulation state. Six types of sand with different particle sizes were tested to determine their AoR values using the well-established fixed funnel method, and a fitting algorithm for sand pile boundary is proposed in this study. Further, a Lasso-based multiple regression model was developed that incorporates roundness and particle width as independent variables. The AoR results indicated that, among the various 2D shape indices, roundness exhibited the strongest correlation with AoR. In addition, the AoR values exhibited a monotonically decreasing trend with decreasing particle size. The AoR values were compared to the internal friction angles obtained from the same sand samples, and the correlation coefficient between the internal friction angle and the AoR was 0.898. This study demonstrates that there is a strong correlation between the internal friction angle and AoR of the dry sand tested in this study.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104804"},"PeriodicalIF":4.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual self-antiaggregating hybrid nanoarchitectonics for synergistic effects on the fire safety of intumescent flame retardant epoxy resins

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.apt.2025.104815

Jianjian Luo , Keqing Zhou , Yan Ding , Lian Yin , Yanan Hou

{"title":"Dual self-antiaggregating hybrid nanoarchitectonics for synergistic effects on the fire safety of intumescent flame retardant epoxy resins","authors":"Jianjian Luo , Keqing Zhou , Yan Ding , Lian Yin , Yanan Hou","doi":"10.1016/j.apt.2025.104815","DOIUrl":"10.1016/j.apt.2025.104815","url":null,"abstract":"<div><div>Prior to the practical application of epoxy resins (EP), critical issues regarding the fire safety of flammable and toxic smoke releases must be addressed. Here, novel nanoarchitectonics with dual self-antiaggregating structure were fabricated in which CeO<sub>2</sub> nanoparticles were grown in situ on molybdenum disulfide (CeO<sub>2</sub>-MoS<sub>2</sub>). CeO<sub>2</sub> alleviated the re-agglomeration of MoS<sub>2</sub>, and then CeO<sub>2</sub>-MoS<sub>2</sub> further mitigated the reunification effect of zeolite imidazolate framework-8 encapsulated ammonium polyphosphate (APP@ZIF-8) in the EP matrix. When CeO<sub>2</sub>-MoS<sub>2</sub> was employed as a synergist to replace 0.5 wt% of APP@ZIF-8 flame retardant, the thermal stability of EP composites was significantly improved, as evidenced by a 41.8% reduction in the maximum mass loss rate compared with pure EP. In addition, the PHRR, PSPR, PCO, and PCO<sub>2</sub> values of EP/0.5C-M/9.5A@Z were decreased by 65.8%, 47.9%, 67.0%, and 67.4%, respectively, while its LOI value improved to 28.2%. Benefit from the barrier and catalytic effect of CeO<sub>2</sub>-MoS<sub>2</sub> nanoarchitectonics, in conjunction with the subsequent formation of multiple metal oxides and phosphorus-containing substances that form an expanding char layer, preventing the heat-mass exchange and smoke diffusion. This research suggests a feasible solution to the problem of high fire hazards in EP.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104815"},"PeriodicalIF":4.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348021","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

Preparation, thermal and mechanical properties of zinc Sulphide/Polypropylene composites

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-02-06 DOI: 10.1016/j.apt.2025.104807

Jiahui Yu , Zhiling Xu , Zhiqi Liu , Na Li , Yue Zhao , Huiming Di , Yuting Zhao , Zhiqiu Yang , Yongcang Ying

{"title":"Preparation, thermal and mechanical properties of zinc Sulphide/Polypropylene composites","authors":"Jiahui Yu , Zhiling Xu , Zhiqi Liu , Na Li , Yue Zhao , Huiming Di , Yuting Zhao , Zhiqiu Yang , Yongcang Ying","doi":"10.1016/j.apt.2025.104807","DOIUrl":"10.1016/j.apt.2025.104807","url":null,"abstract":"<div><div>Zinc sulfide pigments are the most important inorganic white, apart from titanium dioxide and zinc oxide pigments. Here, we proposed the combined method of hydrothermal synthesis, calcination and sand milling to prepare zinc sulphide nanoparticles (ZnS NPs). ZnS NPs were mainly prepared by the precipitation reaction between zinc salt solution and sodium sulfide solution, followed by calcination under nitrogen condition, and concluded with grounding by sand mill. The particle size, crystal structure, and whiteness of ZnS NPs were analyzed by various characterization tools. Importantly, the crystal structures of ZnS NPs were transformed from sphalerite to wurtzite during the calcination process, without any change after sand grinding. ZnS/Polypropylene (ZnS/PP) composites were prepared by melt blending method, and then hot pressing into sheets. ZnS/PP composites exhibited better thermal stability than neat polypropylene from the thermogravimetric and limiting oxygen index analysis. ZnS/PP composites also improved the tensile strength and elongation at break of PP. Moreover, the morphology of the tensile fracture surface of ZnS/PP composites showed the uniform distribution of ZnS NPs within PP matrix and the ductile fracture mode. We anticipate that this work may shed light on fabricating efficient ZnS NPs and thermal stable ZnS-polymer composites.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104807"},"PeriodicalIF":4.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200922","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