Powder Technology最新文献

Machine learning-based regulation of nitrogen/phosphorus-containing explosion-inhibitors for inhibiting methane/coal dust hybrid explosions 基于机器学习的含氮/含磷防爆抑制剂抑制甲烷/煤尘混合爆炸的调控

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-29 DOI: 10.1016/j.powtec.2025.121185

Jiachen Wang , Haitao Li , Shoutong Diao , Yihao Yao , Chi-Min Shu , Minggao Yu , Xinsheng Jiang

{"title":"Machine learning-based regulation of nitrogen/phosphorus-containing explosion-inhibitors for inhibiting methane/coal dust hybrid explosions","authors":"Jiachen Wang , Haitao Li , Shoutong Diao , Yihao Yao , Chi-Min Shu , Minggao Yu , Xinsheng Jiang","doi":"10.1016/j.powtec.2025.121185","DOIUrl":"10.1016/j.powtec.2025.121185","url":null,"abstract":"<div><div>This study explores the inhibitory effects of nitrogen/phosphorus structure-controlled composite materials on methane/coal dust explosions. By integrating experimental data and chemical descriptors, it utilizes the Extreme Gradient Boosting (XGBoost) model, optimized through Particle Swarm Optimization (PSO), to enhance prediction accuracy. The model achieved R<sup>2</sup> improvements of 1.11 %, 0.7 %, and 3.56 % in predicting explosion pressure (<em>P</em>), flame height (<em>H</em>), and flame velocity (<em>V</em>), with RMSE reductions of 38.76 %, 78.65 %, and 33.68 %, and MAE reductions of 93.25 %, 69.23 %, and 27.40 %. The analysis revealed that physical attributes like particle size play a critical role in gas/surface reactions during explosions, surpassing the impact of chemical modifications. Shapley Additive exPlanations (SHAP) analysis further demonstrated that nitrogen content (N%) exhibited a negative correlation with the explosion pressure; when nitrogen content exceeds 12.5 %, both <em>P</em>, <em>H</em>, and <em>V</em> are decrease markedly. Moreover, materials with larger molecular weights (>1300) can substantially reduce <em>H</em> and <em>V</em> by delaying the combustion chain reactions. SHAP reveals complex interactions among inhibitor properties and model relationships. This study not only offers a theoretical foundation for developing nitrogen/phosphorus-containing structure-controlled composite materials in inhibiting methane/coal dust explosions but also provides technical support for the design and optimization of explosion inhibitors.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"463 ","pages":"Article 121185"},"PeriodicalIF":4.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178857","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

Calibrating the kneading contact model for simulating fresh concrete: Incorporating water addition 模拟新拌混凝土的揉捏接触模型的校正：加入水

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-28 DOI: 10.1016/j.powtec.2025.121188

Zhenjiao Sun , Lianjun Chen , Guanguo Ma , Hui Ma , Kang Gao

{"title":"Calibrating the kneading contact model for simulating fresh concrete: Incorporating water addition","authors":"Zhenjiao Sun , Lianjun Chen , Guanguo Ma , Hui Ma , Kang Gao","doi":"10.1016/j.powtec.2025.121188","DOIUrl":"10.1016/j.powtec.2025.121188","url":null,"abstract":"<div><div>Fresh concrete, as a critical construction material, has its mixing process directly influencing its homogeneity and performance. This study calibrates the kneading contact model based on the Discrete element method (DEM) and proposes a systematic approach for DEM parameter calibration. Through rheological and water infiltration experiments, two key parameters—maximum surface energy and liquid conductivity—were determined. Results indicate that maximum surface energy exhibits a linear positive correlation with the maximum torque experienced by the rheometer probe (R<sup>2</sup> = 0.96), while liquid conductivity shows a linear negative correlation with water wetting height (R<sup>2</sup> = 0.95), with calibrated values of 214 J/m<sup>2</sup> and 2.52 s, respectively. Using the calibrated parameters, numerical simulations of fresh concrete mixing under various water-to-cement ratios were conducted, verifying the model's applicability in complex multiphase flow systems. The simulation results demonstrate that the calibrated kneading contact model accurately replicates the rheological properties and particle behaviors of concrete under different water-to-cement conditions, providing a reliable theoretical basis for optimizing concrete mix design and mixing processes.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"463 ","pages":"Article 121188"},"PeriodicalIF":4.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178517","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 K ions on the vaterite CaCO3 formation using the steamed ammonia liquid waste as calcium sources 以蒸氨废液为钙源，K离子对水晶石CaCO3形成的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-26 DOI: 10.1016/j.powtec.2025.121172

Xuewen Song, Ziwei Tang, Xinrui Hua, Mingfei Li, Tianxing Chen, Panyang He

引用次数: 0

Investigating the impact of key variables on differential pressure in cement vertical roller Mills, using the GBM algorithm 利用GBM算法研究了水泥立式辊磨机关键变量对压差的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-26 DOI: 10.1016/j.powtec.2025.121168

Rasoul Fatahi, Hadi Abdollahi, Mohammad Noaparast, Mehdi Hadizadeh

{"title":"Investigating the impact of key variables on differential pressure in cement vertical roller Mills, using the GBM algorithm","authors":"Rasoul Fatahi, Hadi Abdollahi, Mohammad Noaparast, Mehdi Hadizadeh","doi":"10.1016/j.powtec.2025.121168","DOIUrl":"10.1016/j.powtec.2025.121168","url":null,"abstract":"<div><div>Vertical Roller Mills (VRMs) are critical grinding equipment in cement production, with differential pressure (DP) being a key operational parameter affecting stability and efficiency. This research investigates DP prediction in cement VRMs using machine learning algorithms. Addressing the gap in understanding operational variable relationships with DP, Random Forest, Gradient Boosting Machine (GBM), and LightGBM algorithms were compared using 1026 h of operational data from a cement plant VRM. Shapley Additive Explanations (SHAP) identified mill fan speed, working pressure, and feed rate as key influencers of DP, with working pressure being the most dominant factor. K-fold cross-validation validated model performance, with GBM achieving superior results (R<sup>2</sup> = 0.9684, RMSE = 0.1637). Marginal plots revealed nonlinear relationships between operational variables and DP. The stability of VRM operation significantly depends on mill fan speed, working pressure, and feed rate, with working pressure having the most substantial impact on system performance, according to SHAP analysis. Stabilized DP ensures a stable material bed under the rollers and efficient VRM operation. This research aligns with the Conscious Lab concept, utilizing explainable AI algorithms based on plant control room data to optimize operational parameters and improve energy efficiency in cement production.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"463 ","pages":"Article 121168"},"PeriodicalIF":4.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166180","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

Synthesis of layered double hydroxides derived from blast furnace slag 以高炉渣为原料合成层状双氢氧化物

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-26 DOI: 10.1016/j.powtec.2025.121165

Bader Bouzar , Zeinab Mkhahal , Nor-edine Abriak , Charlotte Hurel , Mahfoud Benzerzour

{"title":"Synthesis of layered double hydroxides derived from blast furnace slag","authors":"Bader Bouzar , Zeinab Mkhahal , Nor-edine Abriak , Charlotte Hurel , Mahfoud Benzerzour","doi":"10.1016/j.powtec.2025.121165","DOIUrl":"10.1016/j.powtec.2025.121165","url":null,"abstract":"<div><div>The objective was to develop an efficient and cost-effective adsorbent to stabilize contaminants present in alternative materials used in civil engineering, such as sediments and fly ash. The synthesis method employed included acidic leaching at a constant pH, followed by precipitation, allowing for the production of LDH. The optimization of synthesis parameters was crucial to determine the boundary conditions for the crystallization of this mineral phase. Among the parameters studied for the optimization of LDH synthesis from blast furnace slag were the concentration of HCl, aging time and temperature, pH during aging, as well as the time and temperature of crystallization. The optimal conditions were identified as an HCl concentration of 4 M, an aging time of 30 min at 90 °C, a pH of 12.5, a crystallization time of 12 h, and a crystallization temperature of 70 °C. The synthesized.</div><div>LDH exhibited structural characteristics similar to those observed in other studies, confirming the high quality of the product. This demonstrates that blast furnace slag is a suitable raw material for the synthesis of high quality LDH, while minimizing the formation of undesirable secondary mineral phases.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"462 ","pages":"Article 121165"},"PeriodicalIF":4.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147364","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

Fundamental insights into the effect of bubble size on the bubble-particle detachment 气泡大小对气泡颗粒分离影响的基本见解

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-26 DOI: 10.1016/j.powtec.2025.121166

Liang Zhao , Zhijun Zhang , Qingxia Liu

{"title":"Fundamental insights into the effect of bubble size on the bubble-particle detachment","authors":"Liang Zhao , Zhijun Zhang , Qingxia Liu","doi":"10.1016/j.powtec.2025.121166","DOIUrl":"10.1016/j.powtec.2025.121166","url":null,"abstract":"<div><div>Bubble size plays a pivotal role in froth flotation. The effect of bubble size on bubble-particle collision and attachment has been well identified, but how it affects bubble-particle detachment is still unclear. In this study, the effect of bubble size on bubble-particle detachment was fundamentally investigated, with a special focus on force behavior. The theoretically calculated forces, based on the parameters obtained from the image process, showed good agreement with the measured forces by the bimorph. The interaction force between the bubble and particle was first increased and then decreased during the detachment process, which was attributed to the dynamic competition of the capillary force and Laplace pressure force. The maximum value of the interaction force was defined as the critical detachment force. It represents the minimum detachment force required to detach a particle from a bubble. The critical detachment force was increased with bubble size, which suggested that the detachment between a particle and a larger bubble was more difficult. This was further confirmed by the study of detachment probability. It was found that the detachment probability of the bubble-particle aggregate with a smaller bubble size was higher than that with a larger bubble size.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"463 ","pages":"Article 121166"},"PeriodicalIF":4.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154782","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

Effect of aeration rate on fluidization characteristics and separation of fluidized bed flotation: Experiment and numerical simulation 曝气率对流化床浮选流化特性及分离的影响：实验与数值模拟

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-26 DOI: 10.1016/j.powtec.2025.121170

Qinglin Yin , Shasha Wang , Shihao Ding , Qi He , Xiahui Gui , Yaowen Xing

引用次数: 0

Investigation on ash formation and attrition characteristics of fuel applying to powdered coal-fired circulating fluidized bed boiler system 燃煤粉末状循环流化床锅炉系统中燃料的成灰及磨损特性研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-24 DOI: 10.1016/j.powtec.2025.121130

Manxia Shang , Peixing Han , Junping Zhu , Zhong Huang , Junfu Lyu , Xiwei Ke

{"title":"Investigation on ash formation and attrition characteristics of fuel applying to powdered coal-fired circulating fluidized bed boiler system","authors":"Manxia Shang , Peixing Han , Junping Zhu , Zhong Huang , Junfu Lyu , Xiwei Ke","doi":"10.1016/j.powtec.2025.121130","DOIUrl":"10.1016/j.powtec.2025.121130","url":null,"abstract":"<div><div>Since the mineral distribution of the crushed powdered coal (0-1 mm) differs from that of the sieved powdered coal (0-1 mm), the traditional ash formation characterization method may not apply to the powdered coal-fired circulating fluidized bed (PC-CFB) boiler. Traditional ash formation and powdered coal ash formation experiments were carried out respectively. Results show that the primary ash particle size distribution of the crushed powdered coal is quite different from that of sieved powdered coal. Additionally, the attrition characteristics are related to raw coal size before crushing. The test of physical and chemical properties of ash indicates that the above phenomena can be attributed to the large discrepancy in chemical composition and mineral phases between the two kinds of powdered coal. Finally, the analysis method and data on ash formation and attrition characteristics applicable to PC-CFB boilers are proposed, which facilitate the mathematical modeling of this novel CFB combustion technology.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"462 ","pages":"Article 121130"},"PeriodicalIF":4.5,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138258","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

A coupled CFD-DEM study of the breakup of agglomerate impacted by high-velocity air jet 高速气流冲击下团聚体破碎的CFD-DEM耦合研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-24 DOI: 10.1016/j.powtec.2025.121163

Zhijian Zuo, Bingwen Feng, Tian Liu, Yuan Yang, Shuguang Gong, Jianping Zhang

{"title":"A coupled CFD-DEM study of the breakup of agglomerate impacted by high-velocity air jet","authors":"Zhijian Zuo, Bingwen Feng, Tian Liu, Yuan Yang, Shuguang Gong, Jianping Zhang","doi":"10.1016/j.powtec.2025.121163","DOIUrl":"10.1016/j.powtec.2025.121163","url":null,"abstract":"<div><div>Agglomeration of granular material is a common phenomenon in industries and exploring its high-efficiency breakup method is important to prolong the service life of equipment. In this work, simulations of the breakup of agglomerates impacted by high-velocity air jet are performed based on a coupled CFD-DEM method. Brazilian test and uniaxial compression test are used to obtain the bonding parameters of agglomerate composed of iron ore particles and lime, and the breakup experiment is conducted to validate the simulation model. The impact force exerted on particles, axial velocity, and turbulent kinetic energy along the centerline of air jet, breakup diameter and depth are used to quantify the jet flow and breakup performance. It was found that the initial debonding of particles appears at the stagnation point and a jet-drilled hole is gradually formed during the breakup process. The breakup performance increases with the increase of air inlet pressure. Results obtained indicate that the optimal attack angle and standoff for the agglomerate used in this work are 75° and 15 mm, respectively.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"462 ","pages":"Article 121163"},"PeriodicalIF":4.5,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138257","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

Stable buildup of particles in a vibrating-pulsating high gradient magnetic separator: A simulation study 振动-脉动高梯度磁选机中颗粒稳定堆积的模拟研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-05-24 DOI: 10.1016/j.powtec.2025.121164

Zixing Xue , Rongjie Zhu , Ning Wu , Shuo Li , Tao Xiong , Luzheng Chen

{"title":"Stable buildup of particles in a vibrating-pulsating high gradient magnetic separator: A simulation study","authors":"Zixing Xue , Rongjie Zhu , Ning Wu , Shuo Li , Tao Xiong , Luzheng Chen","doi":"10.1016/j.powtec.2025.121164","DOIUrl":"10.1016/j.powtec.2025.121164","url":null,"abstract":"<div><div>Vibrating-pulsating high gradient magnetic separation (VPHGMS) is a new technology developed from pulsating high gradient magnetic separation (PHGMS). It has higher selectivity than PHGMS due to the introduction of vibration into the matrix. However, previous research mainly focused on the separation performance of VPHGMS through experiments; few studies have concerned about its separation mechanism. In this study, a 2D simulation was applied to reveal the magnetic field distribution, flow field distribution, and particle buildup characteristics in a VPHGMS separator. It was found that the magnetic field distribution around the matrix did not change with the displacement of the matrix, but a much faster and stronger transformation of fluid velocity was observed in VPHGMS than in PHGMS. When the matrix was vibrating, some particles were able to follow its movement and occupied a stable buildup area in the upper and lower surfaces of the matrix. This area expanded with increasing magnetic field distribution, volume susceptibility, and diameter of particles, but shrank with increasing vibrating frequency. The selectivity of VPHGMS was also investigated by analyzing the separation performance on an idealized mixture of two minerals. The simulation results predicted a drop in recovery and an enhancement in selectivity under increased vibrating frequency, which was consistent with experimental results from former studies.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"463 ","pages":"Article 121164"},"PeriodicalIF":4.5,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154781","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