Powder Technology最新文献_第3页

Asymmetric mobilization of arching effect in granular materials: the role of fabric 颗粒材料中拱形效应的非对称调动：织物的作用

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120417

Lin-Jie Deng , Bei-Bing Dai , Feng-Tao Liu , Jun Yang , Wei-Hai Yuan

引用次数: 0

Effect of combined ferrous burden composition and ore-coke interaction on blast furnace burden distribution 综合铁料成分和矿石-焦炭相互作用对高炉炉料分布的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120416

Xiaohui Zhang , Nan Wang , Zongyan Zhou , Zeyao Ning , Min Chen

引用次数: 0

Effect of spreader and particle properties on powder bed generation with discrete element method in additive manufacturing 在增材制造中使用离散元素法时，撒布器和颗粒特性对粉末床生成的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120420

Miao Liu , Xingming Yang , Zhongqiu Liu , Baokuan Li

引用次数: 0

Simulation analysis of damage and energy consumption of rocks during abrasive water jet impacts based on SPH-FDEM method 基于 SPH-FDEM 方法的磨料水射流冲击岩石时的损伤和能耗模拟分析

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120418

Yisheng Hu , Fuzeng Wang , Feng Jiang , Lingbao Hu , Guoqin Huang

{"title":"Simulation analysis of damage and energy consumption of rocks during abrasive water jet impacts based on SPH-FDEM method","authors":"Yisheng Hu , Fuzeng Wang , Feng Jiang , Lingbao Hu , Guoqin Huang","doi":"10.1016/j.powtec.2024.120418","DOIUrl":"10.1016/j.powtec.2024.120418","url":null,"abstract":"<div><div>This study established a simulation model for abrasive water jet rock breaking based on the SPH-FDEM method. The effects of abrasive concentration and jet velocity on crack and energy consumption were investigated based on the model. The effect of finite and infinite element boundaries on simulation results was compared, and it was found that the infinite element boundary can mitigate the damage caused by stress wave reflection on rocks. During water jet rock breaking, the crack mode inside the rock was dominated by Mode-I crack (opening-mode crack) due to the water wedge effect, and the number of cracks and the broken volume increased with increasing velocity and abrasive concentration. In this study, the specific energy consumption (SEC) was used to evaluated the rock-breaking capacity. Under pure water jetting, the SEC decreased with increasing velocity, while with the addition of abrasive, the SEC increased with increasing velocity and abrasive concentration. These findings provided a basis for optimization of water jet machining parameters in engineering applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120418"},"PeriodicalIF":4.5,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587416","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

Effects of fluid properties on coarse particles transport in vertical pipe 流体特性对垂直管道中粗颗粒输送的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120421

Xiaodong Chen , Lele Yang , Lian Luo , Liang Yu , Zhiyuan Luo

引用次数: 0

Surface chemistry characterization of AA2014 aluminum alloy powder through triboelectric charging 通过三电荷对 AA2014 铝合金粉末进行表面化学表征

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120411

Ali N. Alagha , Mathilde Rossier , Emilio Galindo , Martin Conlon , José Muñiz , Kamran Azari , Evan Butler-Jones , Mathieu Brochu

{"title":"Surface chemistry characterization of AA2014 aluminum alloy powder through triboelectric charging","authors":"Ali N. Alagha , Mathilde Rossier , Emilio Galindo , Martin Conlon , José Muñiz , Kamran Azari , Evan Butler-Jones , Mathieu Brochu","doi":"10.1016/j.powtec.2024.120411","DOIUrl":"10.1016/j.powtec.2024.120411","url":null,"abstract":"<div><div>Traditional characterization techniques for powders primarily focus on bulk properties, often neglecting the critical role of surface chemistry variations that influence the performance in applications such as additive manufacturing. The method presented in this work addresses this gap by utilizing triboelectric charging concept to gain a comprehensive understanding of powder surface state under varying environmental conditions. In particular, the study investigates the detection of surface chemistry variations of AA2014 powder caused by an exposure to various relative humidity (RH) levels through a change in triboelectric charging behavior. The surface variations are analyzed in parallel with X-ray photoelectron spectroscopy (XPS). The findings reveal a direct correlation between elevated RH and increased hydroxide species content at the surface of the powder. The triboelectric charging experiments demonstrated a significant RH-dependent variations of charge accumulation, with higher humidity levels leading to reduced static charge buildup on the powder particles. The charge accumulation behavior in the powder was fitted with the compressed exponential relaxation model. The results showed that each surface chemical species exhibits a distinct correlation between charging rate and charge accumulation, confirming the effectiveness of the method to detect subtle variations in surface chemistry. The variations in the exponent of the fitted model were shown to be characteristics to the surface scale of the powder particles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120411"},"PeriodicalIF":4.5,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement and modeling of solids flow behaviors in an aerated standpipe and inclined pipe of circulating fluidized bed full-loop system 循环流化床全循环系统充气立管和斜管中固体流动行为的测量与建模

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-03 DOI: 10.1016/j.powtec.2024.120414

Chunguang Zhou , Christian Jonasson , Marcus Gullberg , Fredrik Ahrentorp , Christer Johansson

{"title":"Measurement and modeling of solids flow behaviors in an aerated standpipe and inclined pipe of circulating fluidized bed full-loop system","authors":"Chunguang Zhou , Christian Jonasson , Marcus Gullberg , Fredrik Ahrentorp , Christer Johansson","doi":"10.1016/j.powtec.2024.120414","DOIUrl":"10.1016/j.powtec.2024.120414","url":null,"abstract":"<div><div>To control solids circulation and optimize design and operating parameters in a circulating fluidized bed full-loop system<strong>,</strong> measurement and modeling of solids flow behaviors in an aerated standpipe and inclined pipe were conducted. Different aeration gas flows were injected at the inclined pipe, which was equipped with different orifice sizes of 37 mm, 54 mm and 75 mm, for regulating solids flow rates. The magnetic tracer-tracking method, which only needs to inject one small magnetic tracer for each measurement to follow the main solids flow, was successfully demonstrated for measuring sand particles' real-time discharge rates, with good accuracy and no calibration requirement. A mathematical model was constructed to predict solids discharge rates and investigate the adverse effect of the pressure gradient in the standpipe bed in a full loop fluidized bed system. The optimization of the solids-return and circulation unit could therefore be achieved with the tools developed in this study.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120414"},"PeriodicalIF":4.5,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Systematic analysis of mixing and segregation patterns of binary mixtures in fluidised beds for multi-functional processes 对流化床中二元混合物的混合和分离模式进行系统分析，以实现多功能工艺

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-02 DOI: 10.1016/j.powtec.2024.120419

Hualun Zhu, Paola Lettieri, Massimiliano Materazzi

{"title":"Systematic analysis of mixing and segregation patterns of binary mixtures in fluidised beds for multi-functional processes","authors":"Hualun Zhu, Paola Lettieri, Massimiliano Materazzi","doi":"10.1016/j.powtec.2024.120419","DOIUrl":"10.1016/j.powtec.2024.120419","url":null,"abstract":"<div><div>Fluidized beds are increasingly used in renewable energy and chemical production due to their versatility in handling different solids for multi-functional industrial applications. The diversity in size and density of solid particles impacts fluidization, influencing mixing and segregation behaviours critical for optimizing chemical processes and reactor design. This study investigates the expansion and segregation behaviours of mixed Geldart group powders in binary systems, simulating polydispersed beds with different materials and catalysts. By applying a modified Cheung equation and an adapted Gibilaro-Rowe model, the study analyzes segregation behaviours of Geldart Group A and B materials at varying mixing rates and gas flow velocities. Results show a good match between experimental data and model predictions. Using novel non-invasive X-ray imaging, the study provides real-time analysis of mixing and segregation at different fluidization regimes and temperatures. These findings aid in designing and optimizing advanced thermochemical conversion technologies, enhancing process efficiency and resilience.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120419"},"PeriodicalIF":4.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and calibration of discrete element model for layered gravel soils in forested areas 林区层状砾石土壤离散元素模型的开发与校准

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-02 DOI: 10.1016/j.powtec.2024.120405

Yuan Zhou , Mohamed A. Shahin , Can Xu , Hongxing Zhu , Zian Ding , Shufa Sun

引用次数: 0

Highly efficient lithium leaching from α-spodumene via binary composite salts low-temperature roasting process 通过二元复合盐低温焙烧工艺从α-锑中高效萃取锂

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-02 DOI: 10.1016/j.powtec.2024.120404

Chenquan Ni , Chang Liu , Jieyi Wang , Yinbo Song , Yuting Liang , Weiqi Xie , Hui Zhong , Zhiguo He

{"title":"Highly efficient lithium leaching from α-spodumene via binary composite salts low-temperature roasting process","authors":"Chenquan Ni , Chang Liu , Jieyi Wang , Yinbo Song , Yuting Liang , Weiqi Xie , Hui Zhong , Zhiguo He","doi":"10.1016/j.powtec.2024.120404","DOIUrl":"10.1016/j.powtec.2024.120404","url":null,"abstract":"<div><div>With the rapid development and widespread application of lithium-ion batteries, the demand for lithium has surged dramatically, drawing increasing attention to its extraction from spodumene deposits. However, the sustainable development of the lithium industry faces challenges, as traditional processes are hindered by high conversion temperatures, excessive acid consumption, and difficulties in purifying the leachate. Hence, we propose a binary composite additive system based on sodium sulfate‑calcium oxide (Na<sub>2</sub>SO<sub>4</sub>-CaO) for roasting α-spodumene at comparative low temperatures. The optimal roasting conditions entailed a mass ratio of spodumene/CaO/Na<sub>2</sub>SO<sub>4</sub> at 1:0.1:0.8, a roasting temperature of 900 °C, a holding time of 2 h, a liquid-to-solid ratio of 5 mL/g, and leaching at 60 °C for 30 min, resulting in an impressive lithium leaching efficiency of 95.45 %. Thermodynamic and kinetic analyses reveal that the roasting formed the product of water-soluble LiNaSO<sub>4</sub>, which was then dissolved into water, with the leaching process being governed by internal diffusion.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120404"},"PeriodicalIF":4.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587335","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