{"title":"基于黄铜矿浮选 CFD 模拟和实验的改进模型","authors":"","doi":"10.1016/j.seppur.2024.129634","DOIUrl":null,"url":null,"abstract":"<div><p>The increasing attention to enhancing flotation performance in strong turbulent environment has become a focal point in research and practical applications. To predict turbulent flotation process, Computational Fluid Dynamics (CFD) simulations and flotation experiments were investigated on pure chalcopyrite in both smooth and vortex generator (VG) mineralized tubes. These investigations aimed to analyze flotation kinetics and flotation rate constant under conditions of 0.4–0.7 m<sup>3</sup>/h slurry flow rate and 0–45 μm, 45–75 μm, 75–125 μm, 125–180 μm particle classes. In the simulation, the user-defined functions (UDFs) and user-defined scalar (UDS) transport equations were used to model the collision, attachment and detachment of bubble-particle, thereby predicting the flotation rate constant. The results showed that the existing flotation kinetic model exhibited unsatisfactory prediction at various particle class and slurry flow rate. It was attributed to the insufficient consideration of turbulence in attachment model. Finally, a modified attachment model adopting a back-calculated method was proposed. This model predicted the flotation rate constant and its trends with changes in slurry flow rate, and the average prediction error is within 26 %. External validation of the model using pure mineral cassiterite demonstrated a prediction error of only 12 %.</p></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A modified model based on CFD simulation and experiments of chalcopyrite flotation\",\"authors\":\"\",\"doi\":\"10.1016/j.seppur.2024.129634\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The increasing attention to enhancing flotation performance in strong turbulent environment has become a focal point in research and practical applications. To predict turbulent flotation process, Computational Fluid Dynamics (CFD) simulations and flotation experiments were investigated on pure chalcopyrite in both smooth and vortex generator (VG) mineralized tubes. These investigations aimed to analyze flotation kinetics and flotation rate constant under conditions of 0.4–0.7 m<sup>3</sup>/h slurry flow rate and 0–45 μm, 45–75 μm, 75–125 μm, 125–180 μm particle classes. In the simulation, the user-defined functions (UDFs) and user-defined scalar (UDS) transport equations were used to model the collision, attachment and detachment of bubble-particle, thereby predicting the flotation rate constant. The results showed that the existing flotation kinetic model exhibited unsatisfactory prediction at various particle class and slurry flow rate. It was attributed to the insufficient consideration of turbulence in attachment model. Finally, a modified attachment model adopting a back-calculated method was proposed. This model predicted the flotation rate constant and its trends with changes in slurry flow rate, and the average prediction error is within 26 %. External validation of the model using pure mineral cassiterite demonstrated a prediction error of only 12 %.</p></div>\",\"PeriodicalId\":427,\"journal\":{\"name\":\"Separation and Purification Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Separation and Purification Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1383586624033732\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1383586624033732","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
A modified model based on CFD simulation and experiments of chalcopyrite flotation
The increasing attention to enhancing flotation performance in strong turbulent environment has become a focal point in research and practical applications. To predict turbulent flotation process, Computational Fluid Dynamics (CFD) simulations and flotation experiments were investigated on pure chalcopyrite in both smooth and vortex generator (VG) mineralized tubes. These investigations aimed to analyze flotation kinetics and flotation rate constant under conditions of 0.4–0.7 m3/h slurry flow rate and 0–45 μm, 45–75 μm, 75–125 μm, 125–180 μm particle classes. In the simulation, the user-defined functions (UDFs) and user-defined scalar (UDS) transport equations were used to model the collision, attachment and detachment of bubble-particle, thereby predicting the flotation rate constant. The results showed that the existing flotation kinetic model exhibited unsatisfactory prediction at various particle class and slurry flow rate. It was attributed to the insufficient consideration of turbulence in attachment model. Finally, a modified attachment model adopting a back-calculated method was proposed. This model predicted the flotation rate constant and its trends with changes in slurry flow rate, and the average prediction error is within 26 %. External validation of the model using pure mineral cassiterite demonstrated a prediction error of only 12 %.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.