Pub Date : 2020-03-16DOI: 10.1080/25726641.2020.1738087
Lifeng Zhang, Q. Ren, H. Duan, Y. Ren, Wei Chen, G. Cheng, Wen Yang, S. Sridhar
ABSTRACT In the current paper, extensive studies of the current authors on the modelling of non-metallic inclusions were summarised. Kinetic studies included the nucleation, collision and agglomeration of inclusions, the interaction between inclusion and bubble in the molten steel, the motion, collision, and removal of inclusions in the molten steel during refining and continuous casting and the entrapment of inclusions in a continuous casting slab strand. Thermodynamic studies included the deoxidation of steel and precise calcium treatment of Al-killed steels. The variation in the composition of inclusions during heating treatment of stainless steels was summarised. The studies ranged from nanoscale of molecules to sub-mili meter scale of inclusions within a meter scale metallurgical vessels, over 10 order in size, and clarified mechanisms for the generation, growth, motion and removal of inclusions in steel.
{"title":"Modelling of non-metallic inclusions in steel","authors":"Lifeng Zhang, Q. Ren, H. Duan, Y. Ren, Wei Chen, G. Cheng, Wen Yang, S. Sridhar","doi":"10.1080/25726641.2020.1738087","DOIUrl":"https://doi.org/10.1080/25726641.2020.1738087","url":null,"abstract":"ABSTRACT In the current paper, extensive studies of the current authors on the modelling of non-metallic inclusions were summarised. Kinetic studies included the nucleation, collision and agglomeration of inclusions, the interaction between inclusion and bubble in the molten steel, the motion, collision, and removal of inclusions in the molten steel during refining and continuous casting and the entrapment of inclusions in a continuous casting slab strand. Thermodynamic studies included the deoxidation of steel and precise calcium treatment of Al-killed steels. The variation in the composition of inclusions during heating treatment of stainless steels was summarised. The studies ranged from nanoscale of molecules to sub-mili meter scale of inclusions within a meter scale metallurgical vessels, over 10 order in size, and clarified mechanisms for the generation, growth, motion and removal of inclusions in steel.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"184 - 206"},"PeriodicalIF":1.2,"publicationDate":"2020-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1738087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45624014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-23DOI: 10.1080/25726641.2020.1729021
S. Ghasemi, N. Rafiei, A. Heidarpour
ABSTRACT Oxalate precipitation is an attractive method for selective recovery of metal cations from leach solutions and for wastewater treatment. In this paper, the experimental results are presented as an oxalate precipitation diagram. The precipitation experiments were carried out on a synthetic sulphate solution containing selected metal cations. At the end of each precipitation step, the precipitates and filtrates were analysed by XRD and AAS, respectively. The experimental results showed that the oxalate precipitation tendency decreased in the following order: which was in good agreement with the calculated precipitation diagram based on solubility product data. Using this diagram, the selective precipitation of any metal cation can be predicted relative to the other cations in the solution. It can be concluded that oxalate precipitation can be employed as an effective process for selective precipitation of metal cations.
{"title":"Theoretical analysis and experimental Validation of selective oxalate precipitation","authors":"S. Ghasemi, N. Rafiei, A. Heidarpour","doi":"10.1080/25726641.2020.1729021","DOIUrl":"https://doi.org/10.1080/25726641.2020.1729021","url":null,"abstract":"ABSTRACT Oxalate precipitation is an attractive method for selective recovery of metal cations from leach solutions and for wastewater treatment. In this paper, the experimental results are presented as an oxalate precipitation diagram. The precipitation experiments were carried out on a synthetic sulphate solution containing selected metal cations. At the end of each precipitation step, the precipitates and filtrates were analysed by XRD and AAS, respectively. The experimental results showed that the oxalate precipitation tendency decreased in the following order: which was in good agreement with the calculated precipitation diagram based on solubility product data. Using this diagram, the selective precipitation of any metal cation can be predicted relative to the other cations in the solution. It can be concluded that oxalate precipitation can be employed as an effective process for selective precipitation of metal cations.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"131 1","pages":"79 - 84"},"PeriodicalIF":1.2,"publicationDate":"2020-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1729021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48151262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-19DOI: 10.1080/25726641.2020.1727160
Isehaq Al-Nafai, K. Osseo-Asare
ABSTRACT The stability relations of cerium and its species in the hydrometallurgical processing of bastnasite were studied using Pourbaix diagrams. Different systems of Ce-(F)-(CO3)-(SO4)-(C2O4)-H2O were constructed using HSC Chemistry software with the necessary thermodynamic data. The Ce-F-H2O system exhibits a large stability region for CeF3 (pH∼ −1.5 – 12). The stability domain of was determined by Ce-CO3-H2 system in the pH of 4.5 – 12. The decomposition behaviours of CeFCO3 were studied by Ce-F-CO3-H2O system which shows the stability domain of CeFCO3 from neutral to basic media. The treatment of CeFCO3 with H2SO4 was investigated by depicting diagrams of Ce-F-CO3-SO4-H2O system. According to this system, CeFCO3 can be decomposed to produce soluble Ce sulphates at around pH 6.2. In contrast, alkaline treatment of CeFCO3 converts it to Ce(OH)3 at pH 11. Finally, the recovery of Ce by oxalate precipitation was studied by Ce-C2O4-H2O system which showed the domain of Ce oxalate decahydrate.
{"title":"Aqueous stability relations in the hydrometallurgical processing of cerium bastnasite","authors":"Isehaq Al-Nafai, K. Osseo-Asare","doi":"10.1080/25726641.2020.1727160","DOIUrl":"https://doi.org/10.1080/25726641.2020.1727160","url":null,"abstract":"ABSTRACT The stability relations of cerium and its species in the hydrometallurgical processing of bastnasite were studied using Pourbaix diagrams. Different systems of Ce-(F)-(CO3)-(SO4)-(C2O4)-H2O were constructed using HSC Chemistry software with the necessary thermodynamic data. The Ce-F-H2O system exhibits a large stability region for CeF3 (pH∼ −1.5 – 12). The stability domain of was determined by Ce-CO3-H2 system in the pH of 4.5 – 12. The decomposition behaviours of CeFCO3 were studied by Ce-F-CO3-H2O system which shows the stability domain of CeFCO3 from neutral to basic media. The treatment of CeFCO3 with H2SO4 was investigated by depicting diagrams of Ce-F-CO3-SO4-H2O system. According to this system, CeFCO3 can be decomposed to produce soluble Ce sulphates at around pH 6.2. In contrast, alkaline treatment of CeFCO3 converts it to Ce(OH)3 at pH 11. Finally, the recovery of Ce by oxalate precipitation was studied by Ce-C2O4-H2O system which showed the domain of Ce oxalate decahydrate.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"131 1","pages":"34 - 43"},"PeriodicalIF":1.2,"publicationDate":"2020-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1727160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49031101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-19DOI: 10.1080/25726641.2020.1729019
J. Chen, E. Jak, P. Hayes
ABSTRACT Studies have been undertaken to investigate the thermodynamic aspects of the reduction roasting of saprolite ores in the Caron Process. Reduction experiments have been conducted in controlled oxygen partial pressure conditions at selected temperatures. Detailed microstructure characterisation and thermodynamic analysis of reduced ore samples, focusing on the phase transformations, nickel recoveries and Ni-Fe alloy compositions produced, were carried out. Comparison has been made between the experimental results and FactSage thermodynamic predictions for these conditions. The differences between between the experimental and predicted results are discussed. It has been shown that the system below 700°C is approximated thermodynamically by considering the nickel–iron alloy product to be in chemical equilibrium with a metastable amorphous oxide phase.
{"title":"Investigation of the reduction roasting of saprolite ores in the Caron Process: microstructure and thermodynamic analysis","authors":"J. Chen, E. Jak, P. Hayes","doi":"10.1080/25726641.2020.1729019","DOIUrl":"https://doi.org/10.1080/25726641.2020.1729019","url":null,"abstract":"ABSTRACT Studies have been undertaken to investigate the thermodynamic aspects of the reduction roasting of saprolite ores in the Caron Process. Reduction experiments have been conducted in controlled oxygen partial pressure conditions at selected temperatures. Detailed microstructure characterisation and thermodynamic analysis of reduced ore samples, focusing on the phase transformations, nickel recoveries and Ni-Fe alloy compositions produced, were carried out. Comparison has been made between the experimental results and FactSage thermodynamic predictions for these conditions. The differences between between the experimental and predicted results are discussed. It has been shown that the system below 700°C is approximated thermodynamically by considering the nickel–iron alloy product to be in chemical equilibrium with a metastable amorphous oxide phase.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"130 1","pages":"160 - 169"},"PeriodicalIF":1.2,"publicationDate":"2020-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1729019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46982935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-12DOI: 10.1080/25726641.2020.1727175
H. Hodge, P. Hayes, W. Hawker, J. Vaughan
ABSTRACT The combination Bayer sinter-leach process has been shown to be a technically viable method for reprocessing bauxite residue to recover lost caustic and alumina. However, this method suffers from high energy requirements and reagent consumption associated with processing the large volume of bauxite residue, the majority of which is gangue. To address this issue, processing a desilication product (DSP) concentrate derived from the novel Sandy Desilication Product process is studied. In the present study, critical processing parameters surrounding the sintering stage were investigated including the grade and particle size of the DSP concentrate, the limestone addition rate, using calcium oxalate as an alternative to limestone and reductive sintering. The DSP concentrate sinter mineral phases were specified using quantitative XRD and the sinter products were assessed for leachability. Maximising the silicate reaction extent during sintering was found to be important to ensure high leachability.
{"title":"The DSP concentrate sinter-leach process for aluminium and sodium recovery 1","authors":"H. Hodge, P. Hayes, W. Hawker, J. Vaughan","doi":"10.1080/25726641.2020.1727175","DOIUrl":"https://doi.org/10.1080/25726641.2020.1727175","url":null,"abstract":"ABSTRACT The combination Bayer sinter-leach process has been shown to be a technically viable method for reprocessing bauxite residue to recover lost caustic and alumina. However, this method suffers from high energy requirements and reagent consumption associated with processing the large volume of bauxite residue, the majority of which is gangue. To address this issue, processing a desilication product (DSP) concentrate derived from the novel Sandy Desilication Product process is studied. In the present study, critical processing parameters surrounding the sintering stage were investigated including the grade and particle size of the DSP concentrate, the limestone addition rate, using calcium oxalate as an alternative to limestone and reductive sintering. The DSP concentrate sinter mineral phases were specified using quantitative XRD and the sinter products were assessed for leachability. Maximising the silicate reaction extent during sintering was found to be important to ensure high leachability.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"131 1","pages":"44 - 52"},"PeriodicalIF":1.2,"publicationDate":"2020-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1727175","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48799276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-20DOI: 10.1080/25726641.2020.1714210
G. Chaitanya, S. Kamble, R. Lollchund, G. Gupta, Z. Chen
ABSTRACT Shaft based processes are used in many disciplines such as in metallurgical and chemical engineering. However, their performance suffers due to the lack in understanding of solid and gas flow thus the heat and mass transfer inside the shaft. Therefore, in this article the study of solid flow has been carried out in presence of gas flow under counter-current condition. A slow moving packed bed, inside the reactor, has been considered. Particles are discharged from the bottom and gas is injected laterally. Particles have been modelled using Discrete Element Method (DEM) and gas flow has been modelled using continuum based fluid flow equations. The effect of various parameters (like particle size, gas flow rate, solid discharge rate etc.,) on the residence time of solid particles has been studied in detail. It is found that gas flow is not symmetric inside the reactor due to asymmetric distribution of voids.
{"title":"Modelling of shaft based processes","authors":"G. Chaitanya, S. Kamble, R. Lollchund, G. Gupta, Z. Chen","doi":"10.1080/25726641.2020.1714210","DOIUrl":"https://doi.org/10.1080/25726641.2020.1714210","url":null,"abstract":"ABSTRACT Shaft based processes are used in many disciplines such as in metallurgical and chemical engineering. However, their performance suffers due to the lack in understanding of solid and gas flow thus the heat and mass transfer inside the shaft. Therefore, in this article the study of solid flow has been carried out in presence of gas flow under counter-current condition. A slow moving packed bed, inside the reactor, has been considered. Particles are discharged from the bottom and gas is injected laterally. Particles have been modelled using Discrete Element Method (DEM) and gas flow has been modelled using continuum based fluid flow equations. The effect of various parameters (like particle size, gas flow rate, solid discharge rate etc.,) on the residence time of solid particles has been studied in detail. It is found that gas flow is not symmetric inside the reactor due to asymmetric distribution of voids.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"157 - 165"},"PeriodicalIF":1.2,"publicationDate":"2020-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1714210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46073392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-19DOI: 10.1080/25726641.2020.1714188
Haijuan Wang, Zhanbing Yang, Hurman Eric
ABSTRACT The modelling of different parts of Submerged Arc Furnace(SAF) used in ferroalloy production has been investigated and the summary showed that both 2D and 3D simulations will help to improve the process for ferroalloys production. However, most of the developed models are in lack of verification from the industry, which needs to be studied or improved in future. And the modelling on electrodes and lining of SAF is helpful for better understanding the inside environment of the furnace hence decreasing the breaking of electrodes, prolonging the lifetime of lining. Modelling of converters for ferroalloy refining - Creusot Loire Uddeholm (CLU)showed some useful results in terms of mass transfer coefficients, mixing times and plume characteristics.
{"title":"Modelling of ferroalloy production processes in the SAF and converter","authors":"Haijuan Wang, Zhanbing Yang, Hurman Eric","doi":"10.1080/25726641.2020.1714188","DOIUrl":"https://doi.org/10.1080/25726641.2020.1714188","url":null,"abstract":"ABSTRACT The modelling of different parts of Submerged Arc Furnace(SAF) used in ferroalloy production has been investigated and the summary showed that both 2D and 3D simulations will help to improve the process for ferroalloys production. However, most of the developed models are in lack of verification from the industry, which needs to be studied or improved in future. And the modelling on electrodes and lining of SAF is helpful for better understanding the inside environment of the furnace hence decreasing the breaking of electrodes, prolonging the lifetime of lining. Modelling of converters for ferroalloy refining - Creusot Loire Uddeholm (CLU)showed some useful results in terms of mass transfer coefficients, mixing times and plume characteristics.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"221 - 228"},"PeriodicalIF":1.2,"publicationDate":"2020-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2020.1714188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46168440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-17DOI: 10.1080/25726641.2019.1706376
H. Sohn
ABSTRACT This article reviews the principles and methods for formulating mathematical or physical models that are useful in the design, analysis and optimization of metallurgical processes. Mathematical models based on first principles are emphasised. Examples of developing new processes based on a first-principle mathematical model or a physical model are presented. Cautions and pitfalls associated with the formulation and application of mathematical models are discussed. The reader is encouraged to carefully examine correctness of the approach and assumptions made in the formulation in order to avoid an erroneous application of a model. For complex processes requiring harsh conditions, physical models are useful. The interpretation and utilisation of the results from physical models can be difficult and sometimes even misleading. This problem is greatly assuaged by combining physical modelling with mathematical modelling. For example, the use of computational fluid dynamics greatly improves the physical modelling of systems involving complex fluid flow.
{"title":"Principles and applications of mathematical and physical modelling of metallurgical processes","authors":"H. Sohn","doi":"10.1080/25726641.2019.1706376","DOIUrl":"https://doi.org/10.1080/25726641.2019.1706376","url":null,"abstract":"ABSTRACT This article reviews the principles and methods for formulating mathematical or physical models that are useful in the design, analysis and optimization of metallurgical processes. Mathematical models based on first principles are emphasised. Examples of developing new processes based on a first-principle mathematical model or a physical model are presented. Cautions and pitfalls associated with the formulation and application of mathematical models are discussed. The reader is encouraged to carefully examine correctness of the approach and assumptions made in the formulation in order to avoid an erroneous application of a model. For complex processes requiring harsh conditions, physical models are useful. The interpretation and utilisation of the results from physical models can be difficult and sometimes even misleading. This problem is greatly assuaged by combining physical modelling with mathematical modelling. For example, the use of computational fluid dynamics greatly improves the physical modelling of systems involving complex fluid flow.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"117 - 144"},"PeriodicalIF":1.2,"publicationDate":"2020-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1706376","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44443622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-06DOI: 10.1080/25726641.2019.1706375
E. Donskoi, J. Manuel, S. Hapugoda, A. Poliakov, T. D. Raynlyn, P. Austin, M. Peterson
ABSTRACT To optimise processing/beneficiation procedures a detailed characterisation of goethitic ores is needed, including mineral liberation, association and textural classification. The identification of different iron oxides and oxyhydroxides is already reliably performed by optical image analysis (OIA). Automated OIA identification of different gangue materials, particularly quartz, can be problematic, however. The article demonstrates the capability of OIA software Mineral4/Recognition4 to characterise goethitic iron ores. Characterisation includes identification of the different types of goethite, hydrohematite and gangue materials such as quartz and kaolinite. XRD and XRF analysis results are compared with those from OIA. Correlation of these results and visual comparison shows that optical image analysis can be an effective tool for characterisation of low and medium grade iron ores. The work highlights issues regarding discrimination of aluminous goethite and gangue, micro and nano-porosity and effective density, for further study.
{"title":"Automated optical image analysis of goethitic iron ores","authors":"E. Donskoi, J. Manuel, S. Hapugoda, A. Poliakov, T. D. Raynlyn, P. Austin, M. Peterson","doi":"10.1080/25726641.2019.1706375","DOIUrl":"https://doi.org/10.1080/25726641.2019.1706375","url":null,"abstract":"ABSTRACT To optimise processing/beneficiation procedures a detailed characterisation of goethitic ores is needed, including mineral liberation, association and textural classification. The identification of different iron oxides and oxyhydroxides is already reliably performed by optical image analysis (OIA). Automated OIA identification of different gangue materials, particularly quartz, can be problematic, however. The article demonstrates the capability of OIA software Mineral4/Recognition4 to characterise goethitic iron ores. Characterisation includes identification of the different types of goethite, hydrohematite and gangue materials such as quartz and kaolinite. XRD and XRF analysis results are compared with those from OIA. Correlation of these results and visual comparison shows that optical image analysis can be an effective tool for characterisation of low and medium grade iron ores. The work highlights issues regarding discrimination of aluminous goethite and gangue, micro and nano-porosity and effective density, for further study.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"131 1","pages":"14 - 24"},"PeriodicalIF":1.2,"publicationDate":"2020-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1706375","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44204324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-06DOI: 10.1080/25726641.2019.1708657
N. Mangadoddy, Teja Reddy Vakamalla, Mayank Kumar, A. Mainza
ABSTRACT Comminution and classification are the two major unit operations involved in the processing of pure minerals from its ore rocks. In the current paper, an assessment is made on different numerical models used for the prediction of fluid and solid flow properties in tumbling mill, hydrocyclone and dense medium cyclone (DMC). A detailed discussion on the selection of suitable turbulence and multiphase models for the accurate prediction of flow field in hydrocyclone is made by comparing the predictions among and against experimental data. The additional requirements for accurate performance predictions at high feed solid content is elaborated. The drawbacks of DPM model and the usage of CFD-DEM coupling technique to predict the coal partition curve in DMC’s has been elucidated. The discrepancies between DEM, CFD, one way and two way coupled CFD-DEM predicted mean flow field and particle dynamics against experimental measurements in tumbling mills also made in detail.
{"title":"Computational modelling of particle-fluid dynamics in comminution and classification: a review","authors":"N. Mangadoddy, Teja Reddy Vakamalla, Mayank Kumar, A. Mainza","doi":"10.1080/25726641.2019.1708657","DOIUrl":"https://doi.org/10.1080/25726641.2019.1708657","url":null,"abstract":"ABSTRACT Comminution and classification are the two major unit operations involved in the processing of pure minerals from its ore rocks. In the current paper, an assessment is made on different numerical models used for the prediction of fluid and solid flow properties in tumbling mill, hydrocyclone and dense medium cyclone (DMC). A detailed discussion on the selection of suitable turbulence and multiphase models for the accurate prediction of flow field in hydrocyclone is made by comparing the predictions among and against experimental data. The additional requirements for accurate performance predictions at high feed solid content is elaborated. The drawbacks of DPM model and the usage of CFD-DEM coupling technique to predict the coal partition curve in DMC’s has been elucidated. The discrepancies between DEM, CFD, one way and two way coupled CFD-DEM predicted mean flow field and particle dynamics against experimental measurements in tumbling mills also made in detail.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"145 - 156"},"PeriodicalIF":1.2,"publicationDate":"2020-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1708657","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49512481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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