Powder Technology最新文献

{"title":"Analysis and prospects of the development status on the dust suppressant research field in the past 20 years","authors":"Ming Li ,&nbsp;Wending Li ,&nbsp;Gang Li ,&nbsp;Donald Lusambo ,&nbsp;Zhijian Luo ,&nbsp;Haochen Lian ,&nbsp;Yuanqi Xu","doi":"10.1016/j.powtec.2025.121443","DOIUrl":"10.1016/j.powtec.2025.121443","url":null,"abstract":"<div><div>To reveal the research progress and development trends in the field of dust suppressants, this paper systematically searched the research literature of “Dust suppressant” included in the Web of Science Core Collection (WOSCC) from 2003 to 2023, and used VOSviewer and CiteSpace to conduct quantitative analysis. The number of publications in the 2017–2023 period is 14 times that of the 2003–2016 period, with China and the United States accounting for 62.5 % and 11.4 %, respectively. The main research content focuses on the development of dust suppressants for specific application scenarios, the characterization and evaluation of dust suppression performance, and the innovations in the mechanisms and effects of dust suppression. The results show that the development of dust suppressants has shifted from a single function to a composite function to meet the functional and performance requirements of complex application scenarios. The selection of dust suppression raw materials has shifted to the secondary utilization of agricultural, industrial and domestic wastes, which improves the environmental protection and economy of dust suppressants and promotes the recycling of resources. The characterization and evaluation methods of dust suppression performance have gradually shifted from a research and development model primarily based on experimental testing to one primarily based on simulation analysis with experimental testing as a supplement. Microbial dust suppressants expand the traditional principle of physical and chemical dust suppression, and innovate the types of dust suppressants through biocalcification, but it is still necessary to further reduce the use cost and improve the biological activity and dust suppression efficiency through optimization research such as strain optimization and multiple synergy. Some novel nanofluid dust suppressants, enzyme dust suppressants and microcapsule dust suppressants have become new research growth points in the field of dust suppression.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121443"},"PeriodicalIF":4.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679689","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":"Strength variation of green pellets and pelletizing mechanism in the pelletization process of vanadium–titanium iron concentrate using organic binders","authors":"Kunyu Ma ,&nbsp;Shengfu Zhang ,&nbsp;Jiahao Zhang ,&nbsp;Tianhao Pu ,&nbsp;Chen Yin ,&nbsp;Mao Chen ,&nbsp;Jiating Rao ,&nbsp;Chenguang Bai","doi":"10.1016/j.powtec.2025.121434","DOIUrl":"10.1016/j.powtec.2025.121434","url":null,"abstract":"<div><div>To enable low-carbon smelting of vanadium‑titanium iron ore in hydrogen-based shaft furnaces, enhancing green pellet performance via organic binders is critical, which improves the iron content and strength of the charged pellets. This work aims to study the effect of pectin, a new organic binder, on the pelletizing properties of vanadium‑titanium iron concentrates (VTIC) compared with traditional binder bentonite and carboxymethyl cellulose (CMC). Optimal binder ratios were determined as 0.2 wt% for pectin and 0.4 wt% for CMC, with corresponding pelletizing times of 11 min and 14 min, respectively. Pectin exhibited superior pelletizing performance. Herein, we analyzed the adsorption and binding mechanism of organic binders during the formation of VTIC green pellets by using the zeta potential, Fourier transform infrared spectroscopy and molecular dynamics. It was found out that pectin exhibited more suitable water absorption properties between VTIC, which contributed to higher strengths of green pellets than those obtained from the CMC. In pelletizing process, both pectin and CMC were adsorbed onto the VTIC primarily by hydrogen bonding involved in the different functional groups. Specifically, carboxyl groups for pectin and hydroxyl groups for CMC. Molecular dynamics simulation results further elucidated these adsorption processes on crystal surface. The negative effect of excessive organic binder concentration on this adsorption process is explained from the perspective of the hydrogen bond energy generated between different interfaces.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121434"},"PeriodicalIF":4.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703127","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":"Enhancement of classification performance for irregular ultrafine particles","authors":"Junqing Xie ,&nbsp;Zhengyuan Deng ,&nbsp;Wei Liu ,&nbsp;Yuanyuan Shao ,&nbsp;Haiping Zhang ,&nbsp;Hui Zhang ,&nbsp;Jesse Zhu","doi":"10.1016/j.powtec.2025.121436","DOIUrl":"10.1016/j.powtec.2025.121436","url":null,"abstract":"<div><div>The increasing industrial demand for ultrafine powders has heightened the need for precise classification technologies. However, achieving high classification accuracy remains challenging, especially for irregularly shaped particles produced by conventional methods. In this study, we proposed a modified classifier design that incorporates a wire mesh with a grid structure onto the classifier impellers to enhance the classification accuracy of irregular particles. The wire mesh promotes the formation of micro-eddies that induce particle rotation, facilitating irregular particles to approximate the hydrodynamic characteristics of spherical particles. We systematically evaluated the effects of mesh position, layer number, and aperture size on classification performance. The results indicate that a single-layer wire mesh outperforms multi-layer configurations, and optimal performance is achieved when the mesh with medium-sized apertures is positioned externally on the impeller blades. The placement of the wire mesh increases D₁₀, reduces D₉₀ and span at the same D₅₀, steepens the partial classification efficiency curve, and lowers the classification accuracy index (K value). These parameters collectively validate the enhancement in classification accuracy. To further assess classification quality, we introduced two new indicators: the overlapping ratio of the area under the particle size distribution (PSD) curves for fine and coarse fractions, and the fine/coarse powder removal ratio. Both metrics confirm the enhanced classification precision. The improvement is attributed to three synergistic effects: micro-eddy-induced particle rotation, improved airflow uniformity due to added resistance, and the mesh's screening effect. This work offers a practical and theoretical basis for improving the classification accuracy of irregular particles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121436"},"PeriodicalIF":4.6,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750348","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 influence of initial temperature on the interactions of water/silver nanofluid with SARS virus using molecular dynamics simulation","authors":"Ibrahim Saeed Gataa ,&nbsp;Baydaa Abed Hussein ,&nbsp;S. Mohammad Sajadi ,&nbsp;Haydar A.S. Aljaafari ,&nbsp;Soheil Salahshour ,&nbsp;Sh. Baghaie","doi":"10.1016/j.powtec.2025.121429","DOIUrl":"10.1016/j.powtec.2025.121429","url":null,"abstract":"<div><div>The mobility and interaction dynamics of viral particles within water/silver nanofluids were significantly affected by the initial temperature, which predominantly affected their kinetic energy. This study utilized molecular dynamics simulations to examine the effect of varying initial temperatures on the interactions between the SARS virus and the water/silver nanofluid. In all modeled samples, equilibrium was achieved after approximately 0.01 ns. The virus demonstrated increased mobility as the temperature rose from 300 K to 330 K, as demonstrated by an increase in Mean Square Displacement from 1.269 Å² to 1.656 Å² and Diffusion Coefficient from 1.13 Å²/ns to 1.434 Å²/ns. Consequently, the interaction energy between virus particles and nanofluid components exhibited a surge at approximately 330 K, transitioning from −1284.03 kcal/mol at 300 K to −1198.04 kcal/mol. Both Mean Square Displacement and Diffusion Coefficient experienced a modest decrease beyond 330 K, and the interaction energy values indicated a decrease in interaction strength. This suggests that excessive thermal perturbation may disrupt stable virus-nanofluid interactions. These results underscore the temperature-dependent character of molecular interactions in the system, which could potentially influence future research on the interactions between nanofluids and viruses. Nevertheless, additional research was required to establish a direct correlation between the antiviral efficacy of these molecular dynamics results.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121429"},"PeriodicalIF":4.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695226","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":"Validation of modelling of velocity distribution of cyclone separators predicted by the simplified models with dimensionless form","authors":"Bo Li ,&nbsp;Heng Jiang ,&nbsp;Xiaolin Wei ,&nbsp;Jing Zhao ,&nbsp;Heng Cheng ,&nbsp;Haiyu Liu","doi":"10.1016/j.powtec.2025.121420","DOIUrl":"10.1016/j.powtec.2025.121420","url":null,"abstract":"<div><div>The cyclone is widely used to separate ash or dust from two gas-solid or liquid-solid flows in the industrial process. The velocity distribution in cyclone separators is important for predicting the cut-size and efficiency of particles and pressure drop in cyclones. Although there are a lot of experimental results in the references for velocity distributions in cyclones, these cyclones in experiments tend to be smaller compared with the actual cyclones. In addition, the simulating results of velocity distribution for cyclones also cost a lot of computational time. In this paper, based on Ogawa's simplified model, the dimensionless equations are derived to predict the tangential velocity distribution in cyclone separators; based on Ingham's model, the dimensionless equations are derived to predict the axial velocity distribution in cyclone separators<!--> <!-->. To verify the accuracy of the dimensionless velocity model, the predicting results are validated with the test data from four different cyclone separators. Compared with the experimental results, the tangential velocity model fits well in both the quasi-free vortex region and the quasi-forced vortex region, and the axial velocity model fits well in the quasi-free vortex region. The models are expected to provide a relatively accurate prediction of the separating behavior of large cyclones, which will be of benefit to the design of industrial large cyclones.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121420"},"PeriodicalIF":4.6,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750349","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":"Dynamics and mechanisms of methane–deposited coal dust–methane continuous explosions: Effects of coal metamorphism and deposition mass","authors":"Chengcai Wei ,&nbsp;Minggao Yu ,&nbsp;Haitao Li ,&nbsp;Yihao Yao ,&nbsp;Gege Hu ,&nbsp;Shoutong Diao ,&nbsp;Jiachen Wang","doi":"10.1016/j.powtec.2025.121435","DOIUrl":"10.1016/j.powtec.2025.121435","url":null,"abstract":"<div><div>Methane–deposited coal dust–methane continuous explosion seriously threatens mine safety and the environment, and its explosion mechanism requires further research. This study employed a self-designed pipeline to examine how coal dust metamorphic degree and deposition mass affect dynamics. Explosion overpressure, flame propagation, and residue characteristics were analyzed. Furthermore, the contribution of each factor to the explosion hazard was quantitatively evaluated using grey relational analysis. Results showed the most severe explosion at 4 g of deposited coal dust. When the methane explosion entered the dust zone, the resulting shock wave entrained dust, intensifying combustion and increasing flame brightness and speed. In the downstream methane-air premixed region, thermal buoyancy, turbulence, and particle motion caused stratified combustion and upward flame deflection. Reflected shock waves led to secondary entrainment and re-ignition of coal dust, producing oscillatory flame propagation. Explosion pressure and flame velocity correlated strongly with coal O/C ratio, volatile matter, and pyrolysis characteristics, confirming that chemical reactivity, volatility, and pyrolysis kinetics govern explosion intensity. Low-rank coals exhibited markedly higher hazard indices than high-rank coals across all metrics. This work elucidates the evolution and mechanisms of methane–coal dust–methane continuous explosions and offers practical guidance for enhancing intrinsic mine safety.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121435"},"PeriodicalIF":4.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686797","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 suppression characteristic and chemical reaction mechanism of calcium carbonate and sodium bicarbonate powder on sulfurous iron ore dust explosions","authors":"Changshun Tian ,&nbsp;Gang Su ,&nbsp;Yunzhang Rao","doi":"10.1016/j.powtec.2025.121438","DOIUrl":"10.1016/j.powtec.2025.121438","url":null,"abstract":"<div><div>This study investigated the suppression effects and underlying mechanisms of calcium carbonate (CaCO₃) and sodium bicarbonate (NaHCO₃) as solid powder suppressants on sulfurous iron ore dust explosions using a self-designed comprehensive thermal analysis method. Results showed that both CaCO₃ and NaHCO₃ effectively suppressed sulfurous iron ore dust explosions. However, at NaHCO₃ mass fractions of ≤20 %, a slight increase in explosion pressure, termed the suppressant enhanced explosion parameter (SEEP) phenomenon, was observed. CaCO₃ primarily suppressed explosions through thermal insulation and heat absorption, while NaHCO₃ achieved suppression through heat absorption, which generated H₂O and CO₂, diluting oxygen concentrations, as well as through chemical effects involving sodium atoms (Na·), sodium ions (Na⁺), or sodium compounds participating in the sulfurous iron ore dust explosion reactions. These findings provide a theoretical basis for selecting effective suppressants for sulfurous iron ore dust explosions.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121438"},"PeriodicalIF":4.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686925","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":"Impact mechanism of dry granular flow under the influence of deposition height behind barrier","authors":"Rui-Xiao Zhang ,&nbsp;Dong Su ,&nbsp;Xiang-Sheng Chen ,&nbsp;Yuan-Jun Jiang","doi":"10.1016/j.powtec.2025.121408","DOIUrl":"10.1016/j.powtec.2025.121408","url":null,"abstract":"<div><div>The effect of deposition height behind the barrier on the granular flow impact mechanism warrants further investigation. In this study, the discrete element method was employed to examine this influence after calibrating the numerical model based on a previously reported study. The results showed that when the normalized deposition height (<em>h</em>/H) is 0.125 or 0.25, sliding particles disturb and mix with deposited material. For the height above 0.25, the deposited volume becomes substantial, pushing accumulation upstream. A linear relationship is observed between accumulation length and deposition height, while pileup height follows a quadratic function. Both final dissipated energy and potential energy share an identical rate of change (0.088), with kinetic energy slightly lower at 0.0613. Deposition reduces the impact force on the retaining wall, with a critical normalized deposition height around 0.2. The maximum and final impact forces demonstrate a quadratic function with the normalized deposition height.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121408"},"PeriodicalIF":4.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703125","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":"Particle-packing porous corundum: pore structure regulation and its influences on permeability","authors":"Hu Chen ,&nbsp;Xin Xiong ,&nbsp;Pengcheng Jiang,&nbsp;Chenhong Ma,&nbsp;Xin Yang,&nbsp;Liya Cai,&nbsp;Guanghai Cheng,&nbsp;Songtao Cai,&nbsp;Zhi Wu","doi":"10.1016/j.powtec.2025.121414","DOIUrl":"10.1016/j.powtec.2025.121414","url":null,"abstract":"<div><div>In virtue of advantages such as high mechanical strength and excellent permeability, particle-packing porous media have been widely applied in metallurgy. However, such materials are far from large-scale industrial applications owing to challenges in pore structure regulation and poor understanding of the effects of pore structure parameters on gas seepage behaviors. In this study, particle-packing porous corundum was prepared using near-equigranular tabular corundum aggregates and tabular corundum fine powder (d₅₀ = 0.045 mm), with activated Al₂O₃ micro-powder as the additive. The effects of the coarse aggregate/matrix ratio and the critical particle size of coarse aggregates on the pore structure and permeability of corundum were investigated. The results demonstrated that the pore structure-related parameters of the corundum could be regulated by tuning the coarse aggregate/matrix ratio and the critical particle size of coarse aggregates. Meanwhile, decreased critical particle size of coarse aggregates and coarse aggregate/matrix ratio led to increased pore structure complexity and drastically degraded permeability of the as-prepared corundum. The effects of pore structure on gas seepage in the as-prepared corundum were explored. As demonstrated, the nonlinearity of gas pressure drop during seepage increased as the gas flow rate increased, and such nonlinearity can be described by the Forchheimer equation. Additionally, the Darcian permeability and the non-Darcian permeability were dependent on apparent porosity and surface fractal dimension of pores, respectively. This study paves the way for full understanding of correlation of pore structure with permeability of particle-packing porous media, thereby facilitating precise permeability control for these materials.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121414"},"PeriodicalIF":4.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679745","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":"Hydrogen-rich reduction process for pellet in blast furnace: Reduction behaviors and reduction kinetics mechanism","authors":"Wenzhuo Ma ,&nbsp;Zhengqi Guo ,&nbsp;Deqing Zhu ,&nbsp;Jian Pan ,&nbsp;Siwei Li ,&nbsp;Tao Dong ,&nbsp;Jin Wang","doi":"10.1016/j.powtec.2025.121419","DOIUrl":"10.1016/j.powtec.2025.121419","url":null,"abstract":"<div><div>To promote low-carbon blast furnace ironmaking, the reduction behaviors of oxidized pellets in traditional blast furnaces and hydrogen-rich blast furnaces were investigated and compared, including low-temperature reduction disintegration index (RDI), reduction swelling index (RSI), reduction index (RI). The results show that the RDI_+3.15 of reduced pellets decreases from 97.98 % to 94.84 %, when the H₂ content is increased from 0 to 20 %. When the H₂ content is increased from 0 to 30 %, the maximal RSI value of reduced pellets in the reduction process (RSI_max) decreases from 17.24 % to 15.75 %, the RSI value of pellets reduced for 60 min (RSI_60min) decreases from 16.61 % to 12.06 %, and the RI increases significantly from 60.26 % to 98.64 %. At 750–950 °C, the reductions of pellets are controlled by 3-dimensional diffusion (Jander) in CO atmosphere, and by 3-dimensional diffusion (Ginstling-Brounstein) in hydrogen-rich atmosphere. These results are further correlated with pore evolution and grain boundary transformations during phase transitions. In the early stage, the main reduction reactions are Fe₂O₃ → Fe₃O₄ → Fe_xO. The lattice distortion results in an increase of the porosity and swelling, which is beneficial to the gas diffusion. In the middle and late stages, the reduction is mainly Fe_xO → Fe. The porosity decreases and the pellets shrink, and the formed dense iron layer hinders the gas diffusion. In the hydrogen-rich atmosphere, the reduction interval of Fe₂O₃ → Fe₃O₄ → Fe_xO is narrow and H₂ can easily pass through the dense iron layer for further reduction, because of its small size and strong diffusion ability.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121419"},"PeriodicalIF":4.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679743","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}