Powder Technology最新文献_第4页

Enhanced efficacy of sodium dodecyl sulfonate in the reverse flotation of hematite with dodecylamine as the collector 十二烷基磺酸钠在以十二胺为捕收剂的赤铁矿反浮选中的功效增强

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-17 DOI: 10.1016/j.powtec.2024.120459

Ximei Luo , Lufan Jia , Shanlong Yang , Xin Guo , Xingyu Liu , Yunfan Wang

{"title":"Enhanced efficacy of sodium dodecyl sulfonate in the reverse flotation of hematite with dodecylamine as the collector","authors":"Ximei Luo , Lufan Jia , Shanlong Yang , Xin Guo , Xingyu Liu , Yunfan Wang","doi":"10.1016/j.powtec.2024.120459","DOIUrl":"10.1016/j.powtec.2024.120459","url":null,"abstract":"<div><div>The cationic reverse flotation of fine iron ore faces the issue of foam stability, which negatively impacts the flotation performance. The effects of single collectors, dodecylamine (DDA) and sodium dodecyl sulfonate (SDS), as well as their combination (DDA + SDS), on the flotation of quartz and hematite were thoroughly examined through micro-flotation and froth stability experiments. The interactions between DDA and SDS, along with the enhanced performance of SDS in the reverse flotation of hematite with DDA, were analyzed using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry, and zeta-potential analysis. The findings indicated that adding SDS to DDA in a specific ratio alleviated the excessive froth stability associated with DDA and improved flotation performance. At pH 7, negatively charged SDS could not adsorb onto mineral surfaces when used alone but could co-adsorb with DDA due to their strong interaction. While SDS co-adsorbed on both minerals, it had minimal impact on DDA adsorption on quartz but significantly reduced it on hematite, leading to differing flotation recoveries. This discrepancy was explained by the difference in charge amounts on the quartz and hematite surfaces, as well as the subsequent adsorption processes.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"450 ","pages":"Article 120459"},"PeriodicalIF":4.5,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705282","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

On-line image analysis for evaporative crystallization of xylose

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-17 DOI: 10.1016/j.powtec.2024.120446

Qihang Zhu, Guangzheng Zhou, Guanghao Hou, Xue Zhong Wang

引用次数: 0

Upscaling co-amorphous formulation of naringin-quinacrine dihydrochloride translating from laboratory to pilot scale using spray drying for improved physicochemical and mechanical properties 利用喷雾干燥技术改善柚皮苷-盐酸喹哪啶的物理化学和机械性能，从实验室到中试规模的柚皮苷-盐酸喹哪啶共晶制剂升级

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-17 DOI: 10.1016/j.powtec.2024.120458

Lasya Priya Katukam, Amruta Prabhakar Padakanti, Naveen Chella

{"title":"Upscaling co-amorphous formulation of naringin-quinacrine dihydrochloride translating from laboratory to pilot scale using spray drying for improved physicochemical and mechanical properties","authors":"Lasya Priya Katukam, Amruta Prabhakar Padakanti, Naveen Chella","doi":"10.1016/j.powtec.2024.120458","DOIUrl":"10.1016/j.powtec.2024.120458","url":null,"abstract":"<div><div>The current work focuses on improving the poor physicochemical and mechanical properties of naringin (NRN) and quinacrine dihydrochloride (QDH) by formulating a co-amorphous system where the properties of individual drugs complement each other. Additionally, an attempt was made to evaluate the effectiveness of spray-drying in scaling up the stable co-amorphous formulations produced by lab-scale process like rotary evaporation. Analytical processes including PXRD, DSC, SEM, and FT-IR spectroscopy confirmed the amorphization of NRN-QDH and molecular interactions between two. A significant enhancement in the NRN solubility along with 10 &19-folds improvement in dissolution rate was observed in FaSSGF & FaSSIF. The flow properties and compression behaviour of QDH were improved in the resultant co-amorphous formulation as confirmed by the micromeritics and Heckel analysis. These positive results encourage further investigation of the preclinical studies to prove the pharmacokinetic and dynamic benefits of this combination and their successful transfer to clinical applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120458"},"PeriodicalIF":4.5,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700035","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 study of proppant embedment under proppant-coal seam interaction 支撑剂-煤层相互作用下支撑剂嵌入的数值研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-17 DOI: 10.1016/j.powtec.2024.120456

Jiaojiao Zhang, Lei Zhou, Liulin Fang, Xiangyan Ren, Xiaocheng Li

{"title":"Numerical study of proppant embedment under proppant-coal seam interaction","authors":"Jiaojiao Zhang, Lei Zhou, Liulin Fang, Xiangyan Ren, Xiaocheng Li","doi":"10.1016/j.powtec.2024.120456","DOIUrl":"10.1016/j.powtec.2024.120456","url":null,"abstract":"<div><div>Experimental studies on proppant embedment in coal seams often overlook factors like pulverized coal shedding, leading to inaccuracies. This study developed a numerical model for proppant embedment in coal seams using elastoplastic theory and the material point method (MPM). This approach addresses the underestimation of embedment depth under high closure stress due to ignored pulverized coal shedding in experiments and overcomes challenges in the traditional numerical simulation of large coal deformation and contact issues. We validated the model through two fundamental numerical cases. Proppant-coal interactions were analyzed under five closure stresses, along with the effects of proppant size and coal strength. Results revealed that proppant embedment occurs in two distinct stages: an initial linear increase attributed to shear damage, followed by a nonlinear rise driven by shear-tensile damage. Traditional experiments underestimated the embedment depth, which was consistent with numerical simulations during the damage stage; however, simulations indicated that embedment depths were doubled at high stress levels. Smaller proppants or higher coal strength raised the critical stress for coal failure. Notably, 1.5 mm proppants embedded ten times deeper than 0.3 mm proppants, with a quadrupled coal damage area. Low-rank coal demonstrated 1.5 times deeper embedment and double the damage area compared to high-rank coal. This study provides a theoretical basis for optimizing proppant selection in hydraulic fracturing.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120456"},"PeriodicalIF":4.5,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700079","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 behavior and defect control in LPBF of quartz glass: Insights from VOF model simulations 石英玻璃 LPBF 中的动态行为和缺陷控制：VOF 模型模拟的启示

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-17 DOI: 10.1016/j.powtec.2024.120450

Yating Qiu , Tian Yang , Hankun Zhu , Wei Han , Koji Sugioka , Lingbao Kong

引用次数: 0

Local-scale variability in packed beds of polyhedral particles: Structural and thermal distribution 多面体颗粒填料床的局部尺度变化：结构和热分布

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-17 DOI: 10.1016/j.powtec.2024.120461

Simson Julian Rodrigues, Neda Kazemi, Evangelos Tsotsas

{"title":"Local-scale variability in packed beds of polyhedral particles: Structural and thermal distribution","authors":"Simson Julian Rodrigues, Neda Kazemi, Evangelos Tsotsas","doi":"10.1016/j.powtec.2024.120461","DOIUrl":"10.1016/j.powtec.2024.120461","url":null,"abstract":"<div><div>Heat transfer in packed beds largely depends on the bed structure, which is strongly linked to particle shape, yet most prior work focuses on spherical particles. This work contributes towards a better understanding of particle shape effect on the local-scale and its variability. Particle beds are generated numerically and steady-state thermal simulations are conducted for 12 different particle shapes and three particle-to-gas conductivity ratios. Voronoi cells are extracted to obtain local cell porosities; distributions are studied statistically. Another crucial parameter, particle-particle contact areas, are evaluated and compared with shapes. Variability in local structure results in varied temperature profiles. Thermal fluctuations are substantially affected by irregular shapes, an effect that increases for highly conductive particles. Notably, the spatial distribution of phases with different conductance has a strong influence on the distribution of local heat flux. Predominantly, these outcomes also indicate the relevancy of including shape parameters in developing reactors or modeling other granular applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120461"},"PeriodicalIF":4.5,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700036","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

Flotation performance and adsorption mechanism of monazite after the transformation of hydrogen-based mineral phase by octyl hydroxamic acid 辛基羟肟酸转化氢基矿相后独居石的浮选性能和吸附机理

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-16 DOI: 10.1016/j.powtec.2024.120462

Quankun Liu , Peng Gao , Jie Liu , Chenyang Guo , Guodong Wen

{"title":"Flotation performance and adsorption mechanism of monazite after the transformation of hydrogen-based mineral phase by octyl hydroxamic acid","authors":"Quankun Liu , Peng Gao , Jie Liu , Chenyang Guo , Guodong Wen","doi":"10.1016/j.powtec.2024.120462","DOIUrl":"10.1016/j.powtec.2024.120462","url":null,"abstract":"<div><div>This study investigated the laws affecting flotation properties of monazite minerals after roasting pretreatment. The flotation performance and adsorption mechanism of monazite after roasting were investigated systematically through simulation tests, which included micro-flotation tests, Brunauer–Emmett–Teller (BET) analysis, contact angle measurement, zeta potential analysis, scanning electron microscopy energy dispersive spectroscopy, Fourier transform infrared analysis, X-ray photoelectron spectroscopy, and DFTB+. The results of the microflotation tests indicated that octyl hydroxamic acid (OHA) had a superior recovery effect on monazite at a pH of ∼9. The flotation performance of OHA on monazite was significantly better than those of salicylhydroxamic acid (SHA) and benzohydroxamic acid (BHA) under the same conditions. A molecular model of monazite after roasting was simulated and structurally optimized using DFTB+. The adsorption energies were calculated for SHA, BHA, and OHA, which confirmed the strong and stable adsorption of OHA on the surface of monazite after roasting.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120462"},"PeriodicalIF":4.5,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700223","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

Powder casting of polyetheretherketone and polyphenylene sulfone: Sintering 聚醚醚酮和聚苯砜的粉末浇铸：烧结

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-16 DOI: 10.1016/j.powtec.2024.120449

Azamat L. Slonov , Azamat A. Zhansitov , Khasan V. Musov , Aslanbek F. Tlupov , Arthur E. Baykaziev , Elena V. Rzhevskaya , Svetlana Yu. Khashirova , Alexander Ya. Malkin

{"title":"Powder casting of polyetheretherketone and polyphenylene sulfone: Sintering","authors":"Azamat L. Slonov , Azamat A. Zhansitov , Khasan V. Musov , Aslanbek F. Tlupov , Arthur E. Baykaziev , Elena V. Rzhevskaya , Svetlana Yu. Khashirova , Alexander Ya. Malkin","doi":"10.1016/j.powtec.2024.120449","DOIUrl":"10.1016/j.powtec.2024.120449","url":null,"abstract":"<div><div>Systematic studies of the influence of the basic powder characteristics and its sintering conditions on the physical and mechanical properties of samples intended for the implementation of the technology of powder injection molding of products from typical heat-resistant high performance engineering polymers - crystallizing polyetheretherketone (PEEK) and amorphous polyphenylene sulfone (PPSu) - were carried out. Polymers with different MW were synthesized as initial materials and powders with different sizes and bulk density were obtained. The influence of these parameters on the nature of powder sinterability and, as a consequence, on their elastic modulus and tensile strength was shown. Optimum characteristics for bulk density and sintering temperature were established, which provide maximum values of mechanical characteristics of the molded samples. The results of the fundamental research conducted allowed us to produce two typical products for biomedicine - an intervertebral cage (an implant replacing a removed vertebra) and a blood dialyzer part.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120449"},"PeriodicalIF":4.5,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700077","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

Two highly-ordered global structures observed in packed beds of balls inside vibrated cylinder: Experiment and modelling of layers 在振动圆筒内的球填料床中观察到两种高度有序的整体结构：层的实验和建模

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-16 DOI: 10.1016/j.powtec.2024.120453

Wiesław Z. Polak , Krzysztof Pałka , Łukasz Guz

引用次数: 0

Effect of drill hole inclination on coal particles-gas flow characteristics in negative pressure sampling process 钻孔倾角对负压采样过程中煤粒-瓦斯流动特性的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-16 DOI: 10.1016/j.powtec.2024.120447

Zedong Zhen , Hongtu Zhang , Ouya Zhang , Botao Li , Zhibo Zhang

引用次数: 0