Powder Technology最新文献_第10页

A novel resource recovery strategy: Substituting carbon powder with organic solid waste in the production of zinc-bearing dust sludge metallization pellets 新型资源回收战略：用有机固体废弃物替代碳粉生产含锌尘泥金属化颗粒

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-28 DOI: 10.1016/j.powtec.2024.120328

Chunlong Fan , Chengyi Ding , Xuchao Wang , Sheng Xue , Rende Chang , Hongming Long

引用次数: 0

Explosion mechanism of HMX dust within a tank and its comparative analysis of explosion characteristics with IPN mist 罐内 HMX 粉尘的爆炸机理及其与 IPN 雾爆炸特性的比较分析

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-28 DOI: 10.1016/j.powtec.2024.120325

Yixiao Zhang, Huimin Liang, Qi Zhang, Zhuorong An, Rui Liu

{"title":"Explosion mechanism of HMX dust within a tank and its comparative analysis of explosion characteristics with IPN mist","authors":"Yixiao Zhang, Huimin Liang, Qi Zhang, Zhuorong An, Rui Liu","doi":"10.1016/j.powtec.2024.120325","DOIUrl":"10.1016/j.powtec.2024.120325","url":null,"abstract":"<div><div>This study establishes a numerical model for dust flow and dust cloud explosion, elucidating the mechanisms underlying HMX dust cloud explosions and the variations in explosion parameters concerning concentration and particle size. Furthermore, it compares HMX dust's explosion parameters with IPN mist's. The findings can be a pivotal basis for the design of explosive compositions and accident prevention. As the concentration increases, both the maximum explosion pressure (<em>P</em><sub>max</sub>) and the maximum rate of pressure rise ((d<em>P</em>/d<em>t</em>)<sub>max</sub>) of HMX dust undergo significant increases. As the particle size increases, <em>P</em><sub>max</sub> and (d<em>P</em>/d<em>t</em>)<sub>max</sub> for HMX dust exhibit no significant variations. When the concentrations of HMX dust and IPN mist are 400 g/m<sup>3</sup>, there are no significant differences in their <em>P</em><sub>max</sub> and (d<em>P</em>/d<em>t</em>)<sub>max</sub>. However, when the concentrations of HMX dust and IPN mist are 100 g/m<sup>3</sup>, the hazards of IPN mist are higher than those of HMX dust.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"448 ","pages":"Article 120325"},"PeriodicalIF":4.5,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424680","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

Stepwise oxidation of refractory pyrite using persulfate for efficient leaching of gold and silver by an eco-friendly copper(II)-glycine-thiosulfate system 利用过硫酸盐分步氧化难熔黄铁矿，通过生态友好型铜(II)-甘氨酸-硫代硫酸盐体系高效浸出金银

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-28 DOI: 10.1016/j.powtec.2024.120323

Lei Hou , Alejandro López Valdivieso , Aurora Robledo-Cabrera , Nasriddinov Zamoniddin Zainiddinovich , Chunhui Wu , Shaoxian Song , Feifei Jia

{"title":"Stepwise oxidation of refractory pyrite using persulfate for efficient leaching of gold and silver by an eco-friendly copper(II)-glycine-thiosulfate system","authors":"Lei Hou , Alejandro López Valdivieso , Aurora Robledo-Cabrera , Nasriddinov Zamoniddin Zainiddinovich , Chunhui Wu , Shaoxian Song , Feifei Jia","doi":"10.1016/j.powtec.2024.120323","DOIUrl":"10.1016/j.powtec.2024.120323","url":null,"abstract":"<div><div>Chemical oxidation is a promising pretreatment method for refractory pyrite enclosure to enhance Au/Ag extraction. Here, persulfate was employed for stepwise oxidation of a refractory pyrite concentrate with encapsulated Au/Ag: (i) pyrite oxidation began with heating-activation persulfate, where hydroxyl radical (•OH) acted as the primary oxidative species for fast-dissolving pyrite into Fe ions; (ii) pyrite self-dissolved Fe ions were in-suit used as a moderate activator of persulfate to generate •OH for sustainable oxidizing pyrite at room temperature. Mineralogical studies have confirmed that oxidation of the sulfide enclosure (FeS<sub>2</sub>) significantly reduced the particle size of pyrite, accompanied by pores creation and an increase in specific surface area. The variation of microstructure liberated Au and Ag particles to lixiviants for extraction, significantly improving leaching efficiency in an eco-friendly copper(II)-glycine-thiosulfate system to 92.2 % for Au and 88.6 % for Ag, respectively. This work provides a promising process for separating precious metals from refractory pyrite.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"448 ","pages":"Article 120323"},"PeriodicalIF":4.5,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424751","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

Sacrificial ceramics powders mix for titanium alloys complex shapes production by hybridization of SPS and 3D printing 通过 SPS 和 3D 打印混合技术生产用于钛合金复杂形状的人工陶瓷粉末混合物

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-28 DOI: 10.1016/j.powtec.2024.120324

Joseph Le Cloarec , Sylvain Marinel , Claude Estournès , Cendrine Folton , Moukrane Dehmas , Charles Manière

引用次数: 0

Effects of particle size composition and burden ratio on burden segregation in the blast furnace throat based on DEM 基于 DEM 的粒度组成和炉料比对高炉喉部炉料偏析的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-28 DOI: 10.1016/j.powtec.2024.120319

Z.X. Di, B. Yan, B. Cheng, S.N. Wang, C.L. Fan

{"title":"Effects of particle size composition and burden ratio on burden segregation in the blast furnace throat based on DEM","authors":"Z.X. Di, B. Yan, B. Cheng, S.N. Wang, C.L. Fan","doi":"10.1016/j.powtec.2024.120319","DOIUrl":"10.1016/j.powtec.2024.120319","url":null,"abstract":"<div><div>In blast furnace charging, burden segregation affects the distribution of gas flow and the efficiency of chemical reactions, which in turn impacts the overall efficiency and quality of ironmaking. This work developed a bell-less top charging model based on the DEM to analyze burden segregation at the furnace throat under various particle size compositions, chute inclinations, and burden ratios. The results show that the burden exhibits a ring-like distribution around the furnace throat, with smaller particles concentrated in the inner ring near the center. When particle size difference of the burden is significant, adjusting the proportion of large or small particles has a more pronounced effect on particle size segregation near the center of the blast furnace. The smaller the chute inclination, the more serious the particle size segregation of the burden. Pellet tends to accumulate near the center of the blast furnace, with a segregation index reaching 0.8 in this region. Adjusting the burden ratio has a more pronounced effect on the segregation of sinter. This work provides theoretical support for charging optimization in blast furnace operation.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"448 ","pages":"Article 120319"},"PeriodicalIF":4.5,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424682","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

Amorphous silica effects on copper flotation: A kinetic and selectivity investigation 无定形二氧化硅对铜浮选的影响：动力学和选择性研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-27 DOI: 10.1016/j.powtec.2024.120327

Lei Wang , Meijun Wang , Yuchao Zou , Xiahui Gui

引用次数: 0

Effect of instantaneous local solid volume fraction on hydrodynamic forces in freely evolving particle suspensions 瞬时局部固体体积分数对自由演化颗粒悬浮液中水动力的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-26 DOI: 10.1016/j.powtec.2024.120312

Ze Cao , Danesh K. Tafti

{"title":"Effect of instantaneous local solid volume fraction on hydrodynamic forces in freely evolving particle suspensions","authors":"Ze Cao , Danesh K. Tafti","doi":"10.1016/j.powtec.2024.120312","DOIUrl":"10.1016/j.powtec.2024.120312","url":null,"abstract":"<div><div>Particle Resolved Simulations (PRS) for freely evolving sphere suspensions at solid volume fractions (<span><math><mi>φ</mi></math></span>) between 0.1 and 0.4, Reynolds number <span><math><mfenced><mo>Re</mo></mfenced></math></span> from 10 to 300 and particle-fluid density ratios <span><math><mfenced><mfrac><msub><mi>ρ</mi><mi>s</mi></msub><msub><mi>ρ</mi><mi>f</mi></msub></mfrac></mfenced></math></span> of 2, 10 and 100 are used to investigate the effect of Voronoi tessellation based particle local solid volume fraction (<span><math><msub><mi>φ</mi><mi>v</mi></msub><mo>)</mo><mspace></mspace></math></span>on particle drag and lateral forces. Findings reveal the instantaneous suspension mean drag force is positively correlated with the variance of <span><math><msub><mi>φ</mi><mi>v</mi></msub></math></span> among particles in the suspension. It is also shown that using the conditioned instantaneous <span><math><msub><mi>φ</mi><mi>v</mi></msub></math></span> of each particle in existing mean drag force correlations can significantly improve the prediction accuracy. Suspension mean lateral force ranges up to 60 % of the drag force while individual particles exhibit values as high as 90 % of the drag force. An instantaneous lateral force correlation is proposed based on suspension-averaged flow variables and <span><math><msub><mi>φ</mi><mi>v</mi></msub></math></span>.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"448 ","pages":"Article 120312"},"PeriodicalIF":4.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424681","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

Prediction of rod-like particle mixing in rotary drums by three machine learning methods based on DEM simulation data 基于 DEM 仿真数据的三种机器学习方法预测旋转滚筒中的棒状颗粒混合情况

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-26 DOI: 10.1016/j.powtec.2024.120307

Wencong Wu, Kaicheng Chen, Evangelos Tsotsas

{"title":"Prediction of rod-like particle mixing in rotary drums by three machine learning methods based on DEM simulation data","authors":"Wencong Wu, Kaicheng Chen, Evangelos Tsotsas","doi":"10.1016/j.powtec.2024.120307","DOIUrl":"10.1016/j.powtec.2024.120307","url":null,"abstract":"<div><div>The mixing of non-spherical particles in rotary drums exhibits significant complexity, particularly when density segregation and size segregation occur simultaneously. Three machine learning models: artificial neural network (ANN), extremely randomized trees (ERT), and particle swarm optimized support vector regression (PSO-SVR) were developed to predict the mixing time and mixing degree at the steady mixing state of rod-like particles in rotary drums. The training, validation, and test data for the machine learning models were generated from 121 discrete element method (DEM) simulations with four independent variables: revolution frequency, particle density ratio, particle size ratio, and drum length. All three models predicted the mixing degree accurately with <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> <span><math><mo>≥</mo></math></span> 0.94. The ERT and PSO-SVR models also predicted the mixing time well with <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> <span><math><mo>≥</mo></math></span> 0.88. Building machine learning models is hundreds of times faster than running DEM simulations, making these models highly promising for predicting larger-scale simulations with more complex-shaped particles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"448 ","pages":"Article 120307"},"PeriodicalIF":4.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326585","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

A DEM study on the criteria for particle movement over a granular bed 关于颗粒床上颗粒运动标准的 DEM 研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-24 DOI: 10.1016/j.powtec.2024.120315

Xin Yin , Ning Huang , Youxing Chen , Jie Zhang

引用次数: 0

Internal friction setting depending on the particle shape 根据颗粒形状设置内部摩擦力

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-09-24 DOI: 10.1016/j.powtec.2024.120308

Daniel Gelnar , Lucie Jezerska , Rostislav Prokes , Martin Zidek , Veronika Sykorova , Jiri Zegzulka

{"title":"Internal friction setting depending on the particle shape","authors":"Daniel Gelnar , Lucie Jezerska , Rostislav Prokes , Martin Zidek , Veronika Sykorova , Jiri Zegzulka","doi":"10.1016/j.powtec.2024.120308","DOIUrl":"10.1016/j.powtec.2024.120308","url":null,"abstract":"<div><div>Research into the properties of input materials and the setup of equipment for polymer process technology is the first step in any development and innovation. Considering the requirements of reducing energy consumption, time and recyclability of materials, it is desirable to develop a tool for setting the mechanical and physical properties of binary mixtures of plastic granulates. Therefore, a dataset containing the particle size distribution, internal friction angle and spreading angle of eight different polymer granulates and their blends was created. If the internal angle of the material does not suit the technology, there is the possibility to change the technology itself or to modify the material passing through the technology at the input. It is also important to know the dependence of particle shape on internal friction. Based on the measured mixing values of the plastic granules, a dataset was created from which the computer program can draw input data to generate a new mixture setting for the desired friction value. Knowing the ingredient ratios to set the desired friction is the technology of the future. Once the input shape parameters of the individual components in the mixture have been given, the model can also be used in reverse, where in turn an idea of the internal friction angles of the input mixture components can be obtained.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"448 ","pages":"Article 120308"},"PeriodicalIF":4.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356995","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