Powder Technology最新文献_第6页

Numerical investigation of abrasive water jet impact force characteristics by using the coupled SPH-FEM method: Considering the shape, the interaction and the fragmentation of abrasive particles 考虑磨粒形状、相互作用和破碎等因素的SPH-FEM耦合方法对磨料水射流冲击力特性的数值研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-20 DOI: 10.1016/j.powtec.2025.121287

Huan Li, Jingbin Li, Zhongwei Huang, Chenrui Guo, Hao Wang, Wenbin Li

{"title":"Numerical investigation of abrasive water jet impact force characteristics by using the coupled SPH-FEM method: Considering the shape, the interaction and the fragmentation of abrasive particles","authors":"Huan Li, Jingbin Li, Zhongwei Huang, Chenrui Guo, Hao Wang, Wenbin Li","doi":"10.1016/j.powtec.2025.121287","DOIUrl":"10.1016/j.powtec.2025.121287","url":null,"abstract":"<div><div>The abrasive water jet (AWJ) is a modern material machining method. In this study, an AWJ-material interaction model that considers the shape, interaction and fragmentation of abrasive particles was developed based on the coupled smoothed particle hydrodynamics (SPH) and finite element method (FEM). Firstly, the theoretical model of jet impact force is utilized to verify the precision of the numerical model, and error of the jet impact force between the numerical and theoretical model is 6.87 %. Then, the mean AWJ impact force, fluctuation degree of AWJ impact force and water impact force ratio during the AWJ material interaction process are investigated. Finally, the effects of the abrasive particle radius, abrasive mass concentration, impact velocity, impact angle and target shape on the AWJ impact force characteristics are revealed. The results deepen the understanding of the AWJ-material interaction process and are beneficial for improving the energy efficiency of the AWJ operation.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"465 ","pages":"Article 121287"},"PeriodicalIF":4.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517542","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

A phase diagram for vibration-induced segregation of a single large particle through packed beds 振动引起的单个大颗粒在填充层中偏析的相图

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-19 DOI: 10.1016/j.powtec.2025.121283

Jia Ma, Yuelei Wang, Jielong He, Zongyan Zhou

引用次数: 0

Exploring percolation of strong network in granular assemblies: the critical roles of particle shape and loading history dependency 探索强网络在颗粒组件中的渗透：颗粒形状和加载历史依赖的关键作用

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-19 DOI: 10.1016/j.powtec.2025.121282

Jiaying Liu , Keqing Lin , Ziyu Jin , Zhiqiang Lai , Xiusong Shi , Tingting Zhao

{"title":"Exploring percolation of strong network in granular assemblies: the critical roles of particle shape and loading history dependency","authors":"Jiaying Liu , Keqing Lin , Ziyu Jin , Zhiqiang Lai , Xiusong Shi , Tingting Zhao","doi":"10.1016/j.powtec.2025.121282","DOIUrl":"10.1016/j.powtec.2025.121282","url":null,"abstract":"<div><div>The mechanical response of granular media subjected to loading-unloading-reloading is crucial for evaluation of safety of engineering works. The evolution of complex network may provide a new insight into the irreversibility of granular materials under loading-unloading-reloading cycle. In this study, we analyze network-based metrics of strong networks in granular materials with different shapes under loading, unloading and reloading path by using DEM. From a macroscopic perspective, samples of non-spherical particles demonstrate a higher degree of irreversibility than those of spherical particles during the unloading after approaching the peak stress. Evident macroscopic hysteresis loop and the corresponding topological features are investigated for 5 stages with different stress states or stress history. Although contact force distributions are similar, the coordination number and clustering coefficient of the strong network vary at a given stress level during loading-unloading cycles. For the same stress states during unloading-reloading process, the largest cluster in strong contact network percolate with a smaller force threshold, demonstrating that the irreversible structural changes to a more unstable state. The gap in strong network topology measures between initial loading and unloading or reloading states is greater in samples of non-spherical shapes. In addition, the importance of contact topology, contact orientation distribution and weak network participation for granular samples with non-spherical shapes should be noticed during loading-unloading-reloading cycles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"464 ","pages":"Article 121282"},"PeriodicalIF":4.5,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471992","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

Numerical investigation of sheathless inertial particle migration and separation approach with a microstructure-patterned channel 具有微结构图像化通道的无鞘惯性粒子迁移分离方法的数值研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-19 DOI: 10.1016/j.powtec.2025.121284

Jinlan Chen , Dong Niu , Ming Xiong , Yunyi Cao , Biao Lei , Jinju Chen , Hongzhong Liu

{"title":"Numerical investigation of sheathless inertial particle migration and separation approach with a microstructure-patterned channel","authors":"Jinlan Chen , Dong Niu , Ming Xiong , Yunyi Cao , Biao Lei , Jinju Chen , Hongzhong Liu","doi":"10.1016/j.powtec.2025.121284","DOIUrl":"10.1016/j.powtec.2025.121284","url":null,"abstract":"<div><div>Microstructure-patterned channels based on sheathless inertial microfluidics have emerged as promising platforms for the migration and separation of multi-size particle mixtures, which is critical for point-of-care testing in the biomedical and environmental fields. This work proposes a quantitative strategy for multi-size particle migration and separation using the microstructure-patterned microchannel. First, we developed a design pattern of the lateral microstructures within a reverse wavy microchannel that enhanced the Dean drag force and inertial lift force. The number of lateral microstructures had a significant impact on the migration positions of small particles where the Dean drag force exceeded the inertial lift force. Next, the mechanism of single-size particle migration positions and multiple-size particle separation dynamics dominated by the enhanced Dean drag force was explored. Moreover, the coupled effects of flow rate, particle size and design pattern within microstructure-patterned microchannels were investigated. The optimal design pattern for the migration and separation of multi-size particle mixtures varied depending on the flow rate. Furthermore, a quantitative strategy was identified and verified for customizing the multi-size migration and separation using a novel explicit scaling factor. This study provides a tuning mechanism and customization strategy for the migration and separation of targeted particles in microstructure-patterned microchannels, which has great potential for practical application in the field of inertial microfluidics.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"465 ","pages":"Article 121284"},"PeriodicalIF":4.5,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502266","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

CFD-based study on wind-assisted spray curtain dust suppression in large cross-section tunnels 基于cfd的大断面隧道风助喷雾幕降尘研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-19 DOI: 10.1016/j.powtec.2025.121248

Wen Nie , Yifei Wang , Huitian Peng , Changwei Xu , Fei Liu , Jianjun Li

{"title":"CFD-based study on wind-assisted spray curtain dust suppression in large cross-section tunnels","authors":"Wen Nie , Yifei Wang , Huitian Peng , Changwei Xu , Fei Liu , Jianjun Li","doi":"10.1016/j.powtec.2025.121248","DOIUrl":"10.1016/j.powtec.2025.121248","url":null,"abstract":"<div><div>To solve the problem of high-concentration coal dust pollution in large mining height fully mechanized mining faces, we propose a wind-assisted spray curtain dust removal device. We conducted air volume tests using various types of hoods and used Fluent software to simulate the optimal combination of nozzles and hoods. We then verified the effectiveness of the device experimentally. Based on our numerical simulation of a fully mechanized mining face with large mining height, the best effect is achieved when the external declination angle of the device is 20°, the air volume is 18 m3/min, and the spray pressure is 6 MPa. The coverage of the high-quality spray field to the section reaches 85.11 %, and the <em>D</em><sub>32</sub> is 78.2 μm in the range of 20–120μm. The device was applied to the Xiaoji Han 13,218 fully mechanized mining face to monitor the dust concentration before and after starting spraying. Total and respirable dust concentrations decreased to 91.8 and 48.2 mg/m<sup>3</sup> after starting the device. The dust removal efficiency reached 87.4 % and 85.5 %, indicating that the device can effectively solve the problem of high-concentration coal dust pollution in a working face.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"465 ","pages":"Article 121248"},"PeriodicalIF":4.5,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536168","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

A mechanistic powder compaction equation: Accounting for the effects of particle properties 机械粉末压实方程：考虑颗粒特性的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-18 DOI: 10.1016/j.powtec.2025.121285

Zhixing Lin, Christopher Kossor, Liang Chen, Rajesh Davé

{"title":"A mechanistic powder compaction equation: Accounting for the effects of particle properties","authors":"Zhixing Lin, Christopher Kossor, Liang Chen, Rajesh Davé","doi":"10.1016/j.powtec.2025.121285","DOIUrl":"10.1016/j.powtec.2025.121285","url":null,"abstract":"<div><div>A mechanistic powder compaction equation is proposed to incorporate physical particle properties into the prediction of tablet tensile strength based on the bonding strength and bonding number. This investigation aims to establish insights between the interplay of particle and material properties including primary particle size, Sauter mean diameter, surface energy, Young's modulus, and Poisson's ratio to calculate the bonding strength and bonding number with tablet porosity and compaction pressure. There are two fitting parameters, brittle parameter <span><math><mi>k</mi></math></span> and corrected contact number <span><math><mi>c</mi></math></span> are related to powder ductility tendency and contact area after compression, respectively. The predicted tablet tensile strength is driven by two terms: bonding number and bonding strength. The model is tested with three sizes of microcrystalline cellulose by characterizing compacted tablets for a range of compaction pressures. The main novelty of this framework is that it can provide a mechanistic insight into the interplay of physical particle properties to predict tablet strength. Ultimately, this model aims to provide guidelines for excipient selection and tablet formulation development.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"464 ","pages":"Article 121285"},"PeriodicalIF":4.5,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471990","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 of the effect of interaction coefficients on dynamic stacking behaviour under various particle shapes 不同粒子形状下相互作用系数对动态堆积行为影响的研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-17 DOI: 10.1016/j.powtec.2025.121255

Youtao Xia, Daolong Yang, Lie Li, Yuming Cui, Wan Ma, Qi Liu, Rui Li, Jin Wang

{"title":"Study of the effect of interaction coefficients on dynamic stacking behaviour under various particle shapes","authors":"Youtao Xia, Daolong Yang, Lie Li, Yuming Cui, Wan Ma, Qi Liu, Rui Li, Jin Wang","doi":"10.1016/j.powtec.2025.121255","DOIUrl":"10.1016/j.powtec.2025.121255","url":null,"abstract":"<div><div>The angle of repose (AoR) is a characteristic parameter of powder and granular materials and is the most intuitive manifestation of particle stacking behaviour. When the particle morphology and interaction coefficient change, the particle stacking morphology and AoR also change. In this paper, to obtain the factors affecting the dynamic stacking behaviour of gangue particles, relying on the injection AoR measuring device and the dynamic stacking simulation model, we designed the orthogonal simulation experiments with the restitution coefficient of particle-particle (PPRC), the static friction coefficient of particle-particle (PPSF), the rolling friction of particle-particle (PPRF), the restitution coefficient of particle-wall (PWRC), the static friction coefficient of particle-wall(PWSF), and the rolling friction coefficient of particle-wall (PWRF) as the influencing factors. Taking the AoR as the evaluation index, we simulated 125 sets of dynamic stacking simulation experiments with different particle morphologies. We obtained the interaction coefficient schemes matching the experiments and the influence laws of the six interaction coefficients on the evaluation index. Among them, the static friction coefficient has the most significant influence. The prediction of the stacking shape formula for rectangular particles was verified, and the error between the prediction result and the actual stacking result was within 15 %, which indicates that other combinations of interaction coefficients can be based on the formula for stacking shape prediction. The model and the prediction method guide the study of the stacking morphology and kinematic behaviour of other particles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"464 ","pages":"Article 121255"},"PeriodicalIF":4.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364374","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

Research on grains movement and interaction mechanism under rice blade spacing and sieve structure effect in vertical rice mill 立式碾米机叶片间距与筛网结构作用下稻米运动及相互作用机理研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-17 DOI: 10.1016/j.powtec.2025.121267

Liu Yang , Pingan Huang , Yu Li , Can Shu , Nuo Yan , Qiujun Zhang , Menghao Zhao , Zhiwei Liu , Jiaming Wang , Shaoyun Song , Yonglin Zhang

{"title":"Research on grains movement and interaction mechanism under rice blade spacing and sieve structure effect in vertical rice mill","authors":"Liu Yang , Pingan Huang , Yu Li , Can Shu , Nuo Yan , Qiujun Zhang , Menghao Zhao , Zhiwei Liu , Jiaming Wang , Shaoyun Song , Yonglin Zhang","doi":"10.1016/j.powtec.2025.121267","DOIUrl":"10.1016/j.powtec.2025.121267","url":null,"abstract":"<div><div>The external milling vertical rice mill (EMVRM) is one of the new rice milling process equipment. The grains moving and interaction mechanism are basic points for milling, rice blade-sand bar spacing H, sieve structure are important structural parameters need considering. The EMVRM 3D model and DEM contact working model are established. The rice blade spacing H and sieve structure effect on grains motion and interaction in is analyzed. Grains motion velocity and density in milling chamber gradually reduced along axial flow direction. The milling chamber grains average motion velocity difference decreases with spacing H increasing. The grain normal and tangential force show down parabolic relation with axial distance from inlet. The sieve direction has little effect on grain motion velocity and force. Normal and tangential force in milling chamber reduced downward along the axial. The research provides practical guidance for EMVRM mill design.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"465 ","pages":"Article 121267"},"PeriodicalIF":4.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490191","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

Development of eco-cemented paste backfill by reutilizing multi-source industrial solid waste: Properties, hydration processes, and environmental impacts 利用多源工业固体废物开发生态胶结膏体充填体：性能、水化过程和环境影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-16 DOI: 10.1016/j.powtec.2025.121276

Xia Yin , Kai Li , Liping Ma , Sancheng Qing , Wang Du , Binbin He , Kai Huang , Jie Yang , Quxiu Dai

{"title":"Development of eco-cemented paste backfill by reutilizing multi-source industrial solid waste: Properties, hydration processes, and environmental impacts","authors":"Xia Yin , Kai Li , Liping Ma , Sancheng Qing , Wang Du , Binbin He , Kai Huang , Jie Yang , Quxiu Dai","doi":"10.1016/j.powtec.2025.121276","DOIUrl":"10.1016/j.powtec.2025.121276","url":null,"abstract":"<div><div>Cemented paste backfill technology plays a vital role in enhancing mining safety and promoting environmental protection. However, the use of Portland cement as a binder increases carbon emissions and limits the broader application of this technology. Thus, in this study, an eco-cemented paste backfill (ECPB) characterized by a low-carbon footprint and cost-effectiveness, using 100 % solid waste, was developed. The feasibility of ECPB was investigated by analyzing performance changes, hydration processes, and environmental impacts. The results showed that the yellow phosphorus slag (YPS) activated by carbide slag (CS) served as a superior binder owing to its positive effects on the workability and mechanical properties of ECPB. Substances in phosphogypsum (PG), such as F<sup>−</sup>, negatively affected the ECPB hydration. However, the addition of YPS and CS improved hydration and pollutant immobilization. The pollutants in ECPB samples were immobilized through neutralization, precipitation, adsorption, and encapsulation. The hydrolysis of CS facilitated the activation of YPS and the immobilization of pollutants, whereas CS-activated YPS facilitated hydration and further pollutant stabilization. Therefore, the PG-YPS-CS-based ECPB offers great potential for improving the sustainability of mining and environmental protection.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"464 ","pages":"Article 121276"},"PeriodicalIF":4.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313765","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

An efficient and green method to separate iron from refractory iron ore by amino mineral phase transformation 氨基矿物相变法从难选铁矿石中分离铁的高效绿色方法

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-06-16 DOI: 10.1016/j.powtec.2025.121277

Cheng Huang , Shuai Yuan , Rui Han , Peng Gao , Yanjun Li

{"title":"An efficient and green method to separate iron from refractory iron ore by amino mineral phase transformation","authors":"Cheng Huang , Shuai Yuan , Rui Han , Peng Gao , Yanjun Li","doi":"10.1016/j.powtec.2025.121277","DOIUrl":"10.1016/j.powtec.2025.121277","url":null,"abstract":"<div><div>Mineral phase transformation technology is an effective approach for processing complex and refractory iron resources. The reductant plays a crucial role in determining the effect of mineral phase transformation. Currently, studies on gas-based reductants mainly focus on CO and H<sub>2</sub>. However, CO as a reductant is associated with high energy consumption and greenhouse gas emissions, and H<sub>2</sub> is difficult to store and transport, resulting in high production costs. Therefore, it is of great significance to develop and explore new reductants. In this study, NH<sub>3</sub> was used as the reductant to study the mineral phase transformation of refractory iron ore resources under an ammonia atmosphere, and the products were processed with magnetic separation. The results indicated that a magnetic concentrate with an average iron grade of 68.21 % and an iron recovery of 91.35 % was obtained under the optimal process conditions: reaction temperature of 620 °C, reaction time of 8 min, NH<sub>3</sub> concentration of 20 %, total gas flow rate of 500 mL/min, a magnetic separation feed fineness of −0.0375 mm accounting for 85.84 %, and 85.6 kA/m magnetic field intensity. Characterization methods including XRD, VSM, BET, XPS, and SEM-EDS were employed to assess the characteristics of products at different stages. The results showed that hematite was reduced to magnetite during the mineral phase transformation, accompanied by the formation of cracks and pores. The mineral phase transformation-magnetic separation process under an ammonia atmosphere effectively enabled the separation of iron minerals from gangue.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"464 ","pages":"Article 121277"},"PeriodicalIF":4.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313763","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