Powder Technology最新文献_第9页

Particle size-dependent coating efficacy in polyol-coated urea: Integration of EDEM multiphysics simulation with release performance validation 多元醇包膜尿素的粒径依赖性包膜效果：EDEM多物理场模拟与释放性能验证的集成

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-15 DOI: 10.1016/j.powtec.2025.122038

Siyu Chen , Xiaomin Hu , Jingjing Dong , Heping Chen , Zirui Zheng , Baixing Ma , Zonghua Li , Wenxiao Zhao , Deqing Chen , Changwei Liu , Min Zhang , Qi Chen , Zhiguang Liu

Understanding the particle size distribution of core materials and the dynamics of the coating process is critical for optimizing the dispersion, polymerization, and coating of polyurethane raw materials on fertilizer surfaces. It also helps to lower industry costs, enhancing efficiency, and safeguarding the environment. In this study, four urea particles (3.0–3.55 mm, 3.55–4.0 mm, 4.0–4.3 mm, and 4.3–4.75 mm) were used to established treatments D1, D2, D3, and D4, respectively. Simultaneously, the EDEM program was used to create three visualization models: the urea self-movement (Model 1), the urea-liquid mixture system (Model 2), and the viscosity change process (Model 3). Results showed that under a 3 % coating material ratio, D2 treatment achieved a nutrient release duration of 147 days, 17.6–50.4 % longer than others. Roller friction played a significant role on the fertilizer during the Model 1 with D2 experiencing a relatively balanced contact force (0.0052 N) and average compressive force (0.0289 N). In Model 2, particle size was negatively correlated with the total dispersion coefficient (TDC) of polyurethane raw materials, with urea-polyol exhibiting a 20.21 % higher TDC than urea and isocyanate. Mixing homogeneity in D2 was moderate. In Model 3, particle viscosity obscured the influence of core size on force differences. Overall, both simulations and experiments identified 3.55–4.00 mm as the optimal particle size, offering the best production efficiency and controlled-release performance. The physical properties of core particles are thus crucial in the feeding and mixing stages of coating, providing valuable insights for improving controlled-release fertilizer (CRF) quality and application.

了解核心材料的粒径分布和涂覆过程的动力学对于优化聚氨酯原料在肥料表面的分散、聚合和涂覆至关重要。它还有助于降低行业成本，提高效率，保护环境。本试验选用4.0 ~ 3.55 mm、3.55 ~ 4.0 mm、4.0 ~ 4.3 mm和4.3 ~ 4.75 mm 4种尿素颗粒，分别建立D1、D2、D3和D4处理。同时，利用EDEM程序创建了尿素自运动（模型1）、尿素-液混合体系（模型2）和粘度变化过程（模型3）三个可视化模型。结果表明，在包衣材料配比为3%的条件下，D2处理的养分释放时间为147 d，比其他处理长17.6% ~ 50.4%。在模型1中，托辊摩擦对肥料的影响显著，D2的接触力（0.0052 N）和平均压缩力（0.0289 N）相对平衡。在模型2中，粒径与聚氨酯原料的总分散系数（TDC）呈负相关，尿素多元醇的TDC比尿素和异氰酸酯的TDC高20.21%。D2的混合均匀性中等。在模型3中，颗粒粘度掩盖了岩心尺寸对力差的影响。综上所述，模拟和实验均确定3.55 ~ 4.00 mm为最佳粒径，具有最佳的生产效率和控释性能。因此，核心颗粒的物理性质在涂层的投料和混合阶段至关重要，为改善控释肥料（CRF）的质量和应用提供了有价值的见解。

{"title":"Particle size-dependent coating efficacy in polyol-coated urea: Integration of EDEM multiphysics simulation with release performance validation","authors":"Siyu Chen , Xiaomin Hu , Jingjing Dong , Heping Chen , Zirui Zheng , Baixing Ma , Zonghua Li , Wenxiao Zhao , Deqing Chen , Changwei Liu , Min Zhang , Qi Chen , Zhiguang Liu","doi":"10.1016/j.powtec.2025.122038","DOIUrl":"10.1016/j.powtec.2025.122038","url":null,"abstract":"<div><div>Understanding the particle size distribution of core materials and the dynamics of the coating process is critical for optimizing the dispersion, polymerization, and coating of polyurethane raw materials on fertilizer surfaces. It also helps to lower industry costs, enhancing efficiency, and safeguarding the environment. In this study, four urea particles (3.0–3.55 mm, 3.55–4.0 mm, 4.0–4.3 mm, and 4.3–4.75 mm) were used to established treatments D1, D2, D3, and D4, respectively. Simultaneously, the EDEM program was used to create three visualization models: the urea self-movement (Model 1), the urea-liquid mixture system (Model 2), and the viscosity change process (Model 3). Results showed that under a 3 % coating material ratio, D2 treatment achieved a nutrient release duration of 147 days, 17.6–50.4 % longer than others. Roller friction played a significant role on the fertilizer during the Model 1 with D2 experiencing a relatively balanced contact force (0.0052 N) and average compressive force (0.0289 N). In Model 2, particle size was negatively correlated with the total dispersion coefficient (TDC) of polyurethane raw materials, with urea-polyol exhibiting a 20.21 % higher TDC than urea and isocyanate. Mixing homogeneity in D2 was moderate. In Model 3, particle viscosity obscured the influence of core size on force differences. Overall, both simulations and experiments identified 3.55–4.00 mm as the optimal particle size, offering the best production efficiency and controlled-release performance. The physical properties of core particles are thus crucial in the feeding and mixing stages of coating, providing valuable insights for improving controlled-release fertilizer (CRF) quality and application.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122038"},"PeriodicalIF":4.6,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836685","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

HEA have microstructure and mechanical properties of nano-TiC ceramic particle reinforced Al0.5CoCrFeNi high-entropy alloy composites prepared by spark plasma sintering 火花等离子烧结法制备了纳米tic陶瓷颗粒增强Al0.5CoCrFeNi高熵合金复合材料

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-15 DOI: 10.1016/j.powtec.2025.122039

Yifan Guo, Jidong Zhang, Haiwei Zhao, Hui-zhong Ma, Lan Zhang

In this study, TiC–Al_0.5CoCrFeNi high-entropy alloy (HEA) matrix composites were successfully fabricated by incorporating varying contents of nano-TiC ceramic particles into the Al_0.5CoCrFeNi HEA using spark plasma sintering (SPS). The effects of TiC content on the microstructure and mechanical properties of the composites were systematically investigated. Unlike previous reports predominantly using micron-sized TiC and higher additions, we introduce nano-sized (∼40 nm) TiC particles at ultra-low contents, which are dispersed along the grain boundaries without altering the dual-phase structure of the HEA matrix. This nanoscale intergranular distribution effectively promotes grain refinement(9.8 um → 5.7 um → 3.5 um) and increases dislocation density(2.72 × 10¹⁴ m⁻² → 3.97 × 10¹⁴ m⁻² → 5.14 × 10¹⁴ m⁻²). The TiC–Al_0.5CoCrFeNi composite exhibited a hardness of 370.6 HV and a tensile strength of 1157 MPa, representing improvements of 29.3 % and 37.7 %, respectively, compared to the HEA. The fracture mechanism of the HEA was characterized by ductile fracture, whereas the composite displayed a mixed fracture mechanism combining ductile and brittle features. A detailed analysis of the strengthening mechanisms indicated that grain refinement, dislocation strengthening, load transfer and the Orowan mechanism jointly contributed to the enhanced mechanical properties.

在本研究中，通过火花等离子烧结（SPS），在Al0.5CoCrFeNi高熵合金（HEA）中加入不同含量的纳米tic陶瓷颗粒，成功制备了TiC-Al0.5CoCrFeNi高熵合金（HEA）基复合材料。系统地研究了TiC含量对复合材料显微组织和力学性能的影响。与之前的报道主要使用微米尺寸的TiC和更高的添加量不同，我们引入了超低含量的纳米尺寸（~ 40 nm） TiC颗粒，它们沿着晶界分散，而不会改变HEA基体的双相结构。这种纳米级的晶间分布有效地促进了晶粒细化（9.8 um→5.7 um→3.5 um），增加了位错密度（2.72 × 1014 m−2→3.97 × 1014 m−2→5.14 × 1014 m−2）。TiC-Al0.5CoCrFeNi复合材料的硬度为370.6 HV，抗拉强度为1157 MPa，分别比HEA提高29.3%和37.7%。HEA的断裂机制为韧性断裂，而复合材料的断裂机制为韧性和脆性混合断裂。强化机理分析表明，晶粒细化、位错强化、载荷传递和Orowan机制共同促进了材料力学性能的增强。

{"title":"HEA have microstructure and mechanical properties of nano-TiC ceramic particle reinforced Al0.5CoCrFeNi high-entropy alloy composites prepared by spark plasma sintering","authors":"Yifan Guo, Jidong Zhang, Haiwei Zhao, Hui-zhong Ma, Lan Zhang","doi":"10.1016/j.powtec.2025.122039","DOIUrl":"10.1016/j.powtec.2025.122039","url":null,"abstract":"<div><div>In this study, TiC–Al<sub>0.5</sub>CoCrFeNi high-entropy alloy (HEA) matrix composites were successfully fabricated by incorporating varying contents of nano-TiC ceramic particles into the Al<sub>0.5</sub>CoCrFeNi HEA using spark plasma sintering (SPS). The effects of TiC content on the microstructure and mechanical properties of the composites were systematically investigated. Unlike previous reports predominantly using micron-sized TiC and higher additions, we introduce nano-sized (∼40 nm) TiC particles at ultra-low contents, which are dispersed along the grain boundaries without altering the dual-phase structure of the HEA matrix. This nanoscale intergranular distribution effectively promotes grain refinement(9.8 um → 5.7 um → 3.5 um) and increases dislocation density(2.72 × 10<sup>14</sup> m<sup>−2</sup> → 3.97 × 10<sup>14</sup> m<sup>−2</sup> → 5.14 × 10<sup>14</sup> m<sup>−2</sup>). The TiC–Al<sub>0.5</sub>CoCrFeNi composite exhibited a hardness of 370.6 HV and a tensile strength of 1157 MPa, representing improvements of 29.3 % and 37.7 %, respectively, compared to the HEA. The fracture mechanism of the HEA was characterized by ductile fracture, whereas the composite displayed a mixed fracture mechanism combining ductile and brittle features. A detailed analysis of the strengthening mechanisms indicated that grain refinement, dislocation strengthening, load transfer and the Orowan mechanism jointly contributed to the enhanced mechanical properties.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122039"},"PeriodicalIF":4.6,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786450","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

Mechanism study on multiphase mass and heat transfer in stirred tanks using stacking ensemble learning and CFD-DEM 基于叠加系综学习和CFD-DEM的搅拌槽内多相传质传热机理研究

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-15 DOI: 10.1016/j.powtec.2025.122035

Boqun Zhang, Zhengquan Li, Huimin Chen, Yide Wang, Xuan Xiang, Hao Tan

This study employed the CFD-DEM coupling model and a developed Stacking ensemble learning algorithm to systematically investigate the mechanisms of comprehensive influence of rotation speed, particle size, and liquid temperature on mass transfer and heat transfer processes in the stirred tank. The Stacking model exhibits high prediction accuracy, with determination coefficients (R²) for both the training and prediction sets exceeding 0.95, and prediction errors below 15 %. All three factors demonstrate significant and distinct effects on heat and mass transfer processes between particles and liquid. The findings demonstrate that particle size and rotation speed constitute governing parameters for mass transfer, with speed exerting dominant influence within the 380–450 rpm range. Heat transfer performance is predominantly governed by liquid temperature and particle size, where the synergistic interaction of elevated temperatures (>75 °C) and larger particle sizes (>3.5 mm) significantly enhances thermal exchange efficiency. This investigation establishes a theoretical foundation for optimized agitated vessel design.

本研究采用CFD-DEM耦合模型和开发的Stacking ensemble学习算法，系统研究了转速、粒度、液体温度对搅拌槽内传质传热过程的综合影响机制。该模型具有较高的预测精度，训练集和预测集的决定系数R2均大于0.95，预测误差小于15%。这三个因素对颗粒与液体之间的传热传质过程都有显著的影响。研究结果表明，颗粒大小和转速是传质的控制参数，在380 ~ 450 rpm范围内，转速对传质起主导作用。换热性能主要由液体温度和颗粒尺寸决定，其中高温（75°C）和较大颗粒尺寸（3.5 mm）的协同作用显著提高了热交换效率。本研究为搅拌容器的优化设计奠定了理论基础。

{"title":"Mechanism study on multiphase mass and heat transfer in stirred tanks using stacking ensemble learning and CFD-DEM","authors":"Boqun Zhang, Zhengquan Li, Huimin Chen, Yide Wang, Xuan Xiang, Hao Tan","doi":"10.1016/j.powtec.2025.122035","DOIUrl":"10.1016/j.powtec.2025.122035","url":null,"abstract":"<div><div>This study employed the CFD-DEM coupling model and a developed Stacking ensemble learning algorithm to systematically investigate the mechanisms of comprehensive influence of rotation speed, particle size, and liquid temperature on mass transfer and heat transfer processes in the stirred tank. The Stacking model exhibits high prediction accuracy, with determination coefficients (<em>R</em><sup>2</sup>) for both the training and prediction sets exceeding 0.95, and prediction errors below 15 %. All three factors demonstrate significant and distinct effects on heat and mass transfer processes between particles and liquid. The findings demonstrate that particle size and rotation speed constitute governing parameters for mass transfer, with speed exerting dominant influence within the 380–450 rpm range. Heat transfer performance is predominantly governed by liquid temperature and particle size, where the synergistic interaction of elevated temperatures (>75 °C) and larger particle sizes (>3.5 mm) significantly enhances thermal exchange efficiency. This investigation establishes a theoretical foundation for optimized agitated vessel design.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122035"},"PeriodicalIF":4.6,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786456","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

DEM modeling of polyhedral gravel particles and their mechanical response in runway applications 多面体碎石颗粒的DEM建模及其在跑道上的力学响应

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-11 DOI: 10.1016/j.powtec.2025.122033

Xiaoying Cheng , Siqiang Wang , Xiaoxia Guo , Michael Zhuravkov , Shunying Ji

Gravel is a critical material in runway and road construction, where particle-scale behavior governs structural performance and durability. This study uses a concave polyhedral discrete element method (DEM) with laser-scanned particle geometries and an energy-conserving contact algorithm to capture realistic interactions. Contact parameters were calibrated through a combined response surface methodology and uniform design method, linking angle of repose and direct shear responses to six key mechanical factors. The optimized parameters enabled DEM results to agree well with regression models and experimental results, validating the calibration framework. Using these parameters, DEM simulations of gravel runways under aircraft loading were performed at horizontal velocities of 40–70 m/s and vertical sinking velocities of 0.3–1.2 m/s. Results show vertical settlement with surface indentations up to 40 mm. Runway deformation increases linearly with sinking velocity but decreases with a power law of horizontal velocity. These results demonstrate the reliability of polyhedral DEM in reproducing gravel mechanics and provide quantitative insights into the design and assessment of gravel runways.

砾石是跑道和道路建设中的关键材料，其颗粒尺度行为决定了结构性能和耐久性。本研究采用具有激光扫描粒子几何形状的凹多面体离散元法（DEM）和节能接触算法来捕捉真实的相互作用。结合响应面法和均匀设计法，将休止角和直剪响应与六个关键力学因素联系起来，对接触参数进行了标定。优化后的参数使DEM结果与回归模型和实验结果吻合较好，验证了定标框架的有效性。利用这些参数，对飞机载荷下砾石跑道进行了水平速度40 ~ 70 m/s、垂直下沉速度0.3 ~ 1.2 m/s的数值模拟。结果表明，垂直沉降，表面压痕达40 mm。跑道变形随下沉速度呈线性增大，随水平速度呈幂律减小。这些结果证明了多面体DEM在再现砾石力学方面的可靠性，并为砾石跑道的设计和评估提供了定量的见解。

{"title":"DEM modeling of polyhedral gravel particles and their mechanical response in runway applications","authors":"Xiaoying Cheng , Siqiang Wang , Xiaoxia Guo , Michael Zhuravkov , Shunying Ji","doi":"10.1016/j.powtec.2025.122033","DOIUrl":"10.1016/j.powtec.2025.122033","url":null,"abstract":"<div><div>Gravel is a critical material in runway and road construction, where particle-scale behavior governs structural performance and durability. This study uses a concave polyhedral discrete element method (DEM) with laser-scanned particle geometries and an energy-conserving contact algorithm to capture realistic interactions. Contact parameters were calibrated through a combined response surface methodology and uniform design method, linking angle of repose and direct shear responses to six key mechanical factors. The optimized parameters enabled DEM results to agree well with regression models and experimental results, validating the calibration framework. Using these parameters, DEM simulations of gravel runways under aircraft loading were performed at horizontal velocities of 40–70 m/s and vertical sinking velocities of 0.3–1.2 m/s. Results show vertical settlement with surface indentations up to 40 mm. Runway deformation increases linearly with sinking velocity but decreases with a power law of horizontal velocity. These results demonstrate the reliability of polyhedral DEM in reproducing gravel mechanics and provide quantitative insights into the design and assessment of gravel runways.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122033"},"PeriodicalIF":4.6,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786458","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 on the blending of AOS/CAB-35binary surfactants and their foam dust suppression performance AOS/ cab -35二元表面活性剂共混及其泡沫抑尘性能研究

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-11 DOI: 10.1016/j.powtec.2025.122026

Zeyu Zhu , Shilin Li , Pengfei Wang , Jiedong Mao , Kai Wei , Yunfei Li , Hongbao Chai , Yong Chen

In coal mining operations, the generation of substantial amounts of dust poses significant risks to both production safety and workers' occupational health. To improve the efficiency of foam dust suppression and reduce water consumption, this study systematically investigated the optimization of the compound ratio in a binary surfactant system consisting of Sodium Alpha-Olefin Sulfonate (AOS) and Cocoamidopropyl Betaine (CAB-35). Through combined experimental and molecular dynamics simulation approaches, key performance metrics—including foam volume, surface tension, natural settling time of pulverized coal, and foam half-life—were evaluated under varying mass concentrations and compound ratios. The results indicate that the optimal comprehensive foam dust suppression performance is achieved at an AOS/CAB-35mass concentration of 0.4 % and a compound ratio of 5:2. Under these conditions, the foam volume reaches 565 mL, the surface tension is 28.7 mN/m, natural settling time of pulverized coal is 96 s, and the foam half-life is 41.37 min. Molecular dynamics simulations further reveal that this specific ratio corresponds to the highest hydrogen bond network strength and water diffusion coefficient. The synergistic mechanism between anionic AOS and zwitterionic CAB-35 enhances dust suppression performance via ion–dipole interactions. This study offers valuable theoretical insights and practical guidance for the formulation of surfactants in dust reduction applications.

在煤矿开采作业中，产生的大量粉尘对生产安全和工人的职业健康构成重大风险。为了提高泡沫粉尘抑制效率和降低水耗，本研究系统地研究了α -烯烃磺酸钠（AOS）和椰酰胺丙基甜菜碱（CAB-35）二元表面活性剂体系的配比优化。通过实验和分子动力学模拟相结合的方法，评估了不同质量浓度和复合比下的泡沫体积、表面张力、煤粉自然沉降时间和泡沫半衰期等关键性能指标。结果表明，AOS/ cab -35质量浓度为0.4%，复合比为5:2时，泡沫综合抑尘性能最佳。在此条件下，泡沫体积达到565 mL，表面张力为28.7 mN/m，煤粉自然沉降时间为96 s，泡沫半衰期为41.37 min。分子动力学模拟进一步表明，这一比例对应着最高的氢键网络强度和水扩散系数。阴离子AOS与两性离子CAB-35之间的协同作用机制通过离子偶极子相互作用增强抑尘性能。该研究为表面活性剂在降尘中的应用提供了有价值的理论见解和实践指导。

{"title":"Study on the blending of AOS/CAB-35binary surfactants and their foam dust suppression performance","authors":"Zeyu Zhu , Shilin Li , Pengfei Wang , Jiedong Mao , Kai Wei , Yunfei Li , Hongbao Chai , Yong Chen","doi":"10.1016/j.powtec.2025.122026","DOIUrl":"10.1016/j.powtec.2025.122026","url":null,"abstract":"<div><div>In coal mining operations, the generation of substantial amounts of dust poses significant risks to both production safety and workers' occupational health. To improve the efficiency of foam dust suppression and reduce water consumption, this study systematically investigated the optimization of the compound ratio in a binary surfactant system consisting of Sodium Alpha-Olefin Sulfonate (AOS) and Cocoamidopropyl Betaine (CAB-35). Through combined experimental and molecular dynamics simulation approaches, key performance metrics—including foam volume, surface tension, natural settling time of pulverized coal, and foam half-life—were evaluated under varying mass concentrations and compound ratios. The results indicate that the optimal comprehensive foam dust suppression performance is achieved at an AOS/CAB-35mass concentration of 0.4 % and a compound ratio of 5:2. Under these conditions, the foam volume reaches 565 mL, the surface tension is 28.7 mN/m, natural settling time of pulverized coal is 96 s, and the foam half-life is 41.37 min. Molecular dynamics simulations further reveal that this specific ratio corresponds to the highest hydrogen bond network strength and water diffusion coefficient. The synergistic mechanism between anionic AOS and zwitterionic CAB-35 enhances dust suppression performance via ion–dipole interactions. This study offers valuable theoretical insights and practical guidance for the formulation of surfactants in dust reduction applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122026"},"PeriodicalIF":4.6,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733839","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

Dynamic response and energy evolution of sandstone under cyclic wet-dry and loading: Implications for degradation and fragmentation characteristics 干湿循环加载下砂岩的动力响应和能量演化：对其退化和破碎特性的影响

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-10 DOI: 10.1016/j.powtec.2025.122025

Xianqi Zhang , Yi Luo , Jinrui Zhang , Hangli Gong , Zhaowei Yang , Jianheng Li

Sandstone in engineering geology often experiences combined environmental and dynamic disturbances such as wet-dry cycling and blasting. This study systematically investigates the dynamic deterioration of sandstone subjected to different wet-dry cycles (0 5 10 15 20 25) using Split Hopkinson Pressure Bar tests. The results show that wet-dry cycling induces progressive microstructural damage increasing porosity and crack connectivity which leads to nonlinear decreases in wave velocity and peak strength. Under impact loading a competitive mechanism between cycle-induced degradation and loading-rate strengthening is observed: at low cycle counts higher loading rates (≥1200 GPa/s) enhance strength whereas at ≥20 cycles degradation dominates reducing peak strength by ∼30 %. Energy analysis reveals that dissipated energy density increases with cycle number and correlates positively with the fractal dimension of fragment size distribution indicating finer and more complex fragmentation. These findings establish an energy–fractal coupling framework for sandstone failure offering insights for evaluating slope stability tunnel support and long-term durability in environments with seasonal wetting and dynamic disturbance.

工程地质中的砂岩常经历干湿循环、爆破等环境和动力双重扰动。本研究系统地研究了不同干湿循环（0 ~ 5 ~ 10 ~ 15 ~ 20 ~ 25）条件下砂岩的动态劣化。研究结果表明：干湿循环导致细观结构损伤，孔隙率和裂纹连通性增加，导致波速和峰值强度非线性降低；在冲击载荷下，观察到循环诱发的退化和加载速率强化之间的竞争机制：在低循环计数下，较高的加载速率（≥1200gpa /s）增强强度，而在≥20次循环时，降解占主导地位，峰值强度降低约30%。能量分析表明，耗散能量密度随循环数的增加而增加，与碎片尺寸分布的分形维数呈正相关，表明碎片更细、更复杂。这些发现建立了砂岩破坏的能量分形耦合框架，为评估季节性湿润和动力扰动环境下的边坡稳定性、隧道支护和长期耐久性提供了见解。

{"title":"Dynamic response and energy evolution of sandstone under cyclic wet-dry and loading: Implications for degradation and fragmentation characteristics","authors":"Xianqi Zhang , Yi Luo , Jinrui Zhang , Hangli Gong , Zhaowei Yang , Jianheng Li","doi":"10.1016/j.powtec.2025.122025","DOIUrl":"10.1016/j.powtec.2025.122025","url":null,"abstract":"<div><div>Sandstone in engineering geology often experiences combined environmental and dynamic disturbances such as wet-dry cycling and blasting. This study systematically investigates the dynamic deterioration of sandstone subjected to different wet-dry cycles (0 5 10 15 20 25) using Split Hopkinson Pressure Bar tests. The results show that wet-dry cycling induces progressive microstructural damage increasing porosity and crack connectivity which leads to nonlinear decreases in wave velocity and peak strength. Under impact loading a competitive mechanism between cycle-induced degradation and loading-rate strengthening is observed: at low cycle counts higher loading rates (≥1200 GPa/s) enhance strength whereas at ≥20 cycles degradation dominates reducing peak strength by ∼30 %. Energy analysis reveals that dissipated energy density increases with cycle number and correlates positively with the fractal dimension of fragment size distribution indicating finer and more complex fragmentation. These findings establish an energy–fractal coupling framework for sandstone failure offering insights for evaluating slope stability tunnel support and long-term durability in environments with seasonal wetting and dynamic disturbance.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122025"},"PeriodicalIF":4.6,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733838","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

Comparative CFD-DEM study of granite fracture mechanisms induced by continuous, pulsed, and abrasive water jets 连续水射流、脉冲水射流和磨料水射流诱导花岗岩断裂机制的CFD-DEM对比研究

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-09 DOI: 10.1016/j.powtec.2025.122030

Wendong Yang , Zelun Li , Bin Liu , Bo Zhang , Pengcheng Ma

High-pressure water jet technology is widely considered as an efficient rock breaking method in petroleum drilling, mining, and tunnel excavation engineering. In order to improve the tunneling efficiency, pulse water jet and abrasive water jet technology are formed based on high-pressure pure water jet. This work introduced a novel simulation method of rock breaking by high-pressure water jet. The discrete element model of the rock specimen was established by the Edinburgh bonded particle model (EBPM).The numerical simulations of the rock breaking by continuous pure water jet, pulsed water jet and abrasive water jet were performed based on a coupled Computational Fluid Dynamics–Discrete Element Method (CFD–DEM). Rock breaking failure mechanism and performance under different jet types was comparatively evaluated by analyzing the load on rock, bond breakage behavior, erosion holes characteristics, and the extent of surface fracture in granite. Simulation results indicate that the dynamic pressure generated by the water jet acts on the rock surface and propagates into the interior in the form of stress waves. The rock breaking process induced by water jets follows a progressive compression–unloading failure cycle, exhibiting a stepwise damage pattern. In the lateral direction, improved rock-breaking performance was achieved by pulsed water jets through successive impacts of water hammer pressure, leading to more efficient surface fragmentation. In the vertical direction, abrasive water jets exhibited greater effectiveness due to the grinding action of abrasive particles, enabling deeper rock penetration.

高压水射流技术作为一种高效的破岩方法，在石油钻井、采矿、隧道开挖等工程中得到了广泛的应用。为了提高隧道掘进效率，在高压纯水射流的基础上形成了脉冲水射流和磨料水射流技术。介绍了一种新的高压水射流破岩模拟方法。采用爱丁堡黏结颗粒模型（EBPM）建立了岩石试样的离散元模型。基于计算流体力学-离散元耦合方法（CFD-DEM），对连续纯水射流、脉冲水射流和磨料水射流的破岩过程进行了数值模拟。通过分析岩石载荷、粘结破坏行为、侵蚀孔洞特征和花岗岩表面断裂程度，对比评价不同射流类型下的破岩破坏机制和性能。模拟结果表明，水射流产生的动压力作用于岩石表面，并以应力波的形式向岩石内部传播。水射流对岩石的破坏过程遵循一个递进的压缩-卸载破坏循环，呈现出递进的破坏模式。在横向上，脉冲水射流通过水锤压力的连续冲击提高了破岩性能，从而提高了地表破碎效率。在垂直方向上，由于磨料颗粒的研磨作用，磨料水射流表现出更大的效率，可以穿透更深的岩石。

{"title":"Comparative CFD-DEM study of granite fracture mechanisms induced by continuous, pulsed, and abrasive water jets","authors":"Wendong Yang , Zelun Li , Bin Liu , Bo Zhang , Pengcheng Ma","doi":"10.1016/j.powtec.2025.122030","DOIUrl":"10.1016/j.powtec.2025.122030","url":null,"abstract":"<div><div>High-pressure water jet technology is widely considered as an efficient rock breaking method in petroleum drilling, mining, and tunnel excavation engineering. In order to improve the tunneling efficiency, pulse water jet and abrasive water jet technology are formed based on high-pressure pure water jet. This work introduced a novel simulation method of rock breaking by high-pressure water jet. The discrete element model of the rock specimen was established by the Edinburgh bonded particle model (EBPM).The numerical simulations of the rock breaking by continuous pure water jet, pulsed water jet and abrasive water jet were performed based on a coupled Computational Fluid Dynamics–Discrete Element Method (CFD–DEM). Rock breaking failure mechanism and performance under different jet types was comparatively evaluated by analyzing the load on rock, bond breakage behavior, erosion holes characteristics, and the extent of surface fracture in granite. Simulation results indicate that the dynamic pressure generated by the water jet acts on the rock surface and propagates into the interior in the form of stress waves. The rock breaking process induced by water jets follows a progressive compression–unloading failure cycle, exhibiting a stepwise damage pattern. In the lateral direction, improved rock-breaking performance was achieved by pulsed water jets through successive impacts of water hammer pressure, leading to more efficient surface fragmentation. In the vertical direction, abrasive water jets exhibited greater effectiveness due to the grinding action of abrasive particles, enabling deeper rock penetration.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122030"},"PeriodicalIF":4.6,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733848","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

Efficient separation of iron and manganese from ferromanganese ore by microwave-assisted fluidization magnetization roasting 微波辅助流态化磁化焙烧法从锰铁矿石中高效分离铁锰

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-09 DOI: 10.1016/j.powtec.2025.122031

Shumo Li , Wentao Zhou , Jiali Chen , Xiao Liu , Shenghan Li , Jinlin Yang , Dingzheng Wang , Zhaoying Zuo , Yukun Fan , Qingfang Liu

Iron and manganese are national strategic mineral resources. Given China's urgent demand for them, fundamental research and cutting-edge technologies for ferromanganese ores are highly important. This aims to enable efficient separation and utilization of iron and manganese, while cutting resource consumption in ferromanganese ore processing. Current challenges for efficient ferromanganese ore utilization include high energy consumption, heavy reliance on chemical reducing agents, and significant pollutant emissions from traditional magnetic roasting. This study proposes a novel microwave fluidization magnetization roasting method using biomass as reducer, selecting Siberian larch biomass as the reducing medium by coupling microwave heating with a fluidized reaction system. Microwave fluidization roasting was performed by regulating core parameters: biomass-ore mixing ratio, roasting temperature, roasting time, and atmosphere composition. The reduced ore was then ground and subjected to weak magnetic separation to obtain iron and manganese concentrates. Results show optimal separation efficiency under: roasting time 20 min, temperature 650 °C, larch content 20 %, feed particle size 80 % -200 mesh, and gas flow rate 0.2 SL/min (25 % CO₂). Characterization (XRD, XPS, TEM) confirmed iron oxides undergo directional reduction from Fe₂O₃ to Fe₃O₄, while manganese oxides complete reduction via stepwise conversion: MnO₂ → Mn₃O₄ → MnO. High-resolution TEM showed Fe₃O₄ (311) crystal plane spacing at 0.252 ± 0.003 nm and MnO (200) at 0.206 ± 0.002 nm, highly consistent with standard theoretical values. Loose porous structures and continuous microcracks formed on mineral surfaces during roasting enhanced mass transfer efficiency and interfacial reaction kinetics.

铁、锰是国家战略性矿产资源。鉴于中国对锰铁的迫切需求，锰铁的基础研究和尖端技术非常重要。其目的是实现铁和锰的有效分离和利用，同时减少锰铁矿石加工中的资源消耗。目前，锰铁矿石的高效利用面临的挑战包括高能耗、对化学还原剂的严重依赖以及传统磁焙烧的大量污染物排放。本研究以生物质为还原剂，选择西伯利亚落叶松生物质为还原剂，通过微波加热与流化反应体系耦合，提出了一种新型的微波流化磁化焙烧方法。通过调节生物质-矿石混合比、焙烧温度、焙烧时间和气氛组成等核心参数，进行微波流态化焙烧。将还原后的矿石磨碎，进行弱磁选，得到铁锰精矿。结果表明，在焙烧时间20 min、温度650℃、落叶松含量20%、进料粒度80% ~ 200目、气体流速0.2 SL/min （25% CO2）条件下，分选效率最佳。表征（XRD， XPS， TEM）证实了铁氧化物由Fe2O3定向还原为Fe3O4，而锰氧化物则通过MnO2→Mn3O4→MnO的逐步转化完成还原。高分辨率透射电镜显示，Fe3O4（311）的晶面间距为0.252±0.003 nm, MnO（200）的晶面间距为0.206±0.002 nm，与标准理论值高度一致。在焙烧过程中，矿物表面形成松散的多孔结构和连续的微裂纹，提高了传质效率和界面反应动力学。

{"title":"Efficient separation of iron and manganese from ferromanganese ore by microwave-assisted fluidization magnetization roasting","authors":"Shumo Li , Wentao Zhou , Jiali Chen , Xiao Liu , Shenghan Li , Jinlin Yang , Dingzheng Wang , Zhaoying Zuo , Yukun Fan , Qingfang Liu","doi":"10.1016/j.powtec.2025.122031","DOIUrl":"10.1016/j.powtec.2025.122031","url":null,"abstract":"<div><div>Iron and manganese are national strategic mineral resources. Given China's urgent demand for them, fundamental research and cutting-edge technologies for ferromanganese ores are highly important. This aims to enable efficient separation and utilization of iron and manganese, while cutting resource consumption in ferromanganese ore processing. Current challenges for efficient ferromanganese ore utilization include high energy consumption, heavy reliance on chemical reducing agents, and significant pollutant emissions from traditional magnetic roasting. This study proposes a novel microwave fluidization magnetization roasting method using biomass as reducer, selecting Siberian larch biomass as the reducing medium by coupling microwave heating with a fluidized reaction system. Microwave fluidization roasting was performed by regulating core parameters: biomass-ore mixing ratio, roasting temperature, roasting time, and atmosphere composition. The reduced ore was then ground and subjected to weak magnetic separation to obtain iron and manganese concentrates. Results show optimal separation efficiency under: roasting time 20 min, temperature 650 °C, larch content 20 %, feed particle size 80 % -200 mesh, and gas flow rate 0.2 SL/min (25 % CO<sub>2</sub>). Characterization (XRD, XPS, TEM) confirmed iron oxides undergo directional reduction from Fe<sub>2</sub>O<sub>3</sub> to Fe<sub>3</sub>O<sub>4</sub>, while manganese oxides complete reduction via stepwise conversion: MnO<sub>2</sub> → Mn<sub>3</sub>O<sub>4</sub> → MnO. High-resolution TEM showed Fe<sub>3</sub>O<sub>4</sub> (311) crystal plane spacing at 0.252 ± 0.003 nm and MnO (200) at 0.206 ± 0.002 nm, highly consistent with standard theoretical values. Loose porous structures and continuous microcracks formed on mineral surfaces during roasting enhanced mass transfer efficiency and interfacial reaction kinetics.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122031"},"PeriodicalIF":4.6,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733842","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

Artificial neural networks discover the effects of particle-size distribution on the appearance of powder coatings 人工神经网络发现了颗粒尺寸分布对粉末涂料外观的影响

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-08 DOI: 10.1016/j.powtec.2025.122028

Yujie Zhang , Xinping Zhu , Bo-mei Liu , Wei Liu , Yingchun Liu , Zhengyuan Deng , Yongsheng Han , Jesse Zhu , Hui Zhang

Powder coating has been heavily applied in many fields due to its zero VOC emission and excellent protective performance. The appearance of powder coating such as glossiness and roughness is paramount for its practical utility. Among various factors influencing appearance, the particle-size distribution (PSD) stands out as a significant feature. Nevertheless, the impact of PSD on powder-coating appearance remains largely empirical and insufficiently quantified. This study undertakes an in-depth investigation into the intricate relationship between PSD and powder-coating appearance, utilizing advanced machine learning models. The PSDs of the powders were characterized using a classification into seventy-five particle-size bins ranging from 0.100 to 1000

μ

m, each associated with its respective volume percentage. In this work, gloss at 60° was employed to measure the coating glossiness, whereas the Ra value (Arithmetic Average Roughness) was utilized to assess the coating roughness. Artificial neural network (ANN) models identify the impactful particle-size bins with positive and negative effects on static and dynamic flowability.

粉末涂料因其零VOC排放和优异的防护性能，在许多领域得到了广泛的应用。粉末涂料的外观，如光泽度和粗糙度对其实用性至关重要。在影响外观的诸多因素中，粒径分布（PSD）是一个显著的特征。然而，PSD对粉末涂层外观的影响在很大程度上仍然是经验的，没有充分量化。本研究利用先进的机器学习模型，深入研究PSD与粉末涂层外观之间的复杂关系。将粉末的psd分为75个粒径范围为0.100 ~ 1000 μm的颗粒仓，每个颗粒仓与其各自的体积百分比相关联。在这项工作中，采用60°光泽度来衡量涂层的光泽度，而Ra值（算术平均粗糙度）用于评估涂层的粗糙度。人工神经网络（ANN）模型识别了对静态和动态流动性有积极和消极影响的粒径仓。

{"title":"Artificial neural networks discover the effects of particle-size distribution on the appearance of powder coatings","authors":"Yujie Zhang , Xinping Zhu , Bo-mei Liu , Wei Liu , Yingchun Liu , Zhengyuan Deng , Yongsheng Han , Jesse Zhu , Hui Zhang","doi":"10.1016/j.powtec.2025.122028","DOIUrl":"10.1016/j.powtec.2025.122028","url":null,"abstract":"<div><div>Powder coating has been heavily applied in many fields due to its zero VOC emission and excellent protective performance. The appearance of powder coating such as glossiness and roughness is paramount for its practical utility. Among various factors influencing appearance, the particle-size distribution (PSD) stands out as a significant feature. Nevertheless, the impact of PSD on powder-coating appearance remains largely empirical and insufficiently quantified. This study undertakes an in-depth investigation into the intricate relationship between PSD and powder-coating appearance, utilizing advanced machine learning models. The PSDs of the powders were characterized using a classification into seventy-five particle-size bins ranging from 0.100 to 1000 <span><math><mi>μ</mi></math></span>m, each associated with its respective volume percentage. In this work, gloss at 60° was employed to measure the coating glossiness, whereas the Ra value (Arithmetic Average Roughness) was utilized to assess the coating roughness. Artificial neural network (ANN) models identify the impactful particle-size bins with positive and negative effects on static and dynamic flowability.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 122028"},"PeriodicalIF":4.6,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733750","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

High-aspect-ratio calcium sulfate whiskers synthesized from phosphogypsum via aluminum sulfate-assisted impurity removal for papermaking fillers 以磷石膏为原料，硫酸铝辅助除杂合成高纵横比硫酸钙晶须

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology

Pub Date : 2025-12-07 DOI: 10.1016/j.powtec.2025.121981

Mingqi Liu , Yuxin Liu , Jizhen Huang , Yi Mei

The increasing accumulation of phosphogypsum (PG), a by-product of phosphoric acid production, poses significant environmental challenges due to its complex composition and difficult utilization. This study presents a novel, cost-effective, and energy-efficient method for synthesizing high-aspect-ratio calcium sulfate hemihydrate whiskers (CSW) from PG using an aluminum sulfate-assisted glycerol-water system under atmospheric pressure. The results show that the addition of 2.5 wt% aluminum sulfate effectively removes impurities from PG, enhancing the surface morphology of the CSW. The average length of the whiskers increased from 120 μm to 220 μm, and the aspect ratio increased from 46.12 to 68.25. Furthermore, the glycerol-water system demonstrated excellent recyclability, maintaining stable seed generation for more than eight cycles, thereby reducing the cost of whisker production. Hydrophobic modification of the whiskers with 4 wt% sodium stearate at 95 °C resulted in a significant increase in the contact angle from 29.26° to 68.56°, and the modified whiskers were successfully applied in papermaking. The produced paper met the standards of GB/T 30130–2013 for offset printing paper, thus proving the feasibility of using CSW as high-performance fillers to partially replace plant fibers. This study provides a new approach for the high-value utilization of phosphogypsum and offers technical guidance for the industrial-scale production of calcium sulfate whiskers.

磷酸生产的副产物磷石膏（PG）由于其复杂的成分和难以利用而日益积累，给环境带来了重大挑战。本研究提出了一种在常压下使用硫酸铝辅助甘油-水体系以PG为原料合成高纵横比硫酸钙半水合晶须（CSW）的新颖、经济、节能的方法。结果表明，添加2.5 wt%硫酸铝能有效去除PG中的杂质，改善CSW的表面形貌。晶须平均长度从120 μm增加到220 μm，长径比从46.12增加到68.25。此外，甘油-水体系表现出优异的可循环性，保持稳定的种子生成超过8个循环，从而降低了须生产的成本。在95℃条件下，用4 wt%硬脂酸钠对晶须进行疏水改性，使晶须的接触角由29.26°增加到68.56°，并成功地应用于造纸。生产的纸张符合GB/T 30130-2013胶版印刷纸标准，证明了用CSW作为高性能填料部分替代植物纤维的可行性。本研究为磷石膏的高价值利用提供了一条新途径，为硫酸钙晶须的工业化生产提供了技术指导。

{"title":"High-aspect-ratio calcium sulfate whiskers synthesized from phosphogypsum via aluminum sulfate-assisted impurity removal for papermaking fillers","authors":"Mingqi Liu , Yuxin Liu , Jizhen Huang , Yi Mei","doi":"10.1016/j.powtec.2025.121981","DOIUrl":"10.1016/j.powtec.2025.121981","url":null,"abstract":"<div><div>The increasing accumulation of phosphogypsum (PG), a by-product of phosphoric acid production, poses significant environmental challenges due to its complex composition and difficult utilization. This study presents a novel, cost-effective, and energy-efficient method for synthesizing high-aspect-ratio calcium sulfate hemihydrate whiskers (CSW) from PG using an aluminum sulfate-assisted glycerol-water system under atmospheric pressure. The results show that the addition of 2.5 wt% aluminum sulfate effectively removes impurities from PG, enhancing the surface morphology of the CSW. The average length of the whiskers increased from 120 μm to 220 μm, and the aspect ratio increased from 46.12 to 68.25. Furthermore, the glycerol-water system demonstrated excellent recyclability, maintaining stable seed generation for more than eight cycles, thereby reducing the cost of whisker production. Hydrophobic modification of the whiskers with 4 wt% sodium stearate at 95 °C resulted in a significant increase in the contact angle from 29.26° to 68.56°, and the modified whiskers were successfully applied in papermaking. The produced paper met the standards of GB/T 30130–2013 for offset printing paper, thus proving the feasibility of using CSW as high-performance fillers to partially replace plant fibers. This study provides a new approach for the high-value utilization of phosphogypsum and offers technical guidance for the industrial-scale production of calcium sulfate whiskers.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"470 ","pages":"Article 121981"},"PeriodicalIF":4.6,"publicationDate":"2025-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733747","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