CFD modeling of multiphase flows in bottom blown copper smelting furnace

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.advisorJokilaakso, Ari, Prof., Aalto University, Department of Chemical and Metallurgical Engineering, Finland.
dc.contributor.authorSong, Kezhou
dc.contributor.departmentKemian tekniikan ja metallurgian laitosfi
dc.contributor.departmentDepartment of Chemical and Metallurgical Engineeringen
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.schoolSchool of Chemical Technologyen
dc.contributor.supervisorJokilaakso, Ari, Prof., Aalto University, Department of Chemical and Metallurgical Engineering, Finland.
dc.date.accessioned2023-12-04T10:00:18Z
dc.date.available2023-12-04T10:00:18Z
dc.date.defence2023-12-15
dc.date.issued2023
dc.description.abstractThe advancement of copper production techniques has witnessed significant developments, with the continual emergence of new copper smelting and converting equipment and processes. The application of Bottom Blown Copper Smelting (SKS, ShuiKouShan) technology has attracted increasing attention since its introduction into production. To reveal the dynamics of agitation within the bath and optimize the variable parameters, Computational Fluid Dynamics (CFD) simulations were conducted on scaled-down and industrial-scale models of SKS furnaces, with various furnace structures and operating conditions. In this modeling research, the Multi-Fluid Volume of Fraction (Multi-Fluid VOF) model wasemployed for the first time in the simulation of SKS furnaces. The simulated results were in good accordance with experimental water models concerning the gas plume geometrics and surface wave characteristics. The numerical model employed exhibits significant potential for broader applicability, not only within the domain of SKS furnaces but also for similar industrial vessels characterized by comparable geometry and gas flow regimes. The simulation results presented the persistent rotation of gas plumes, accompanied by thepresence of low-velocity regions on the opposite side of the plumes. To enhance agitation within these low-velocity regions and minimize the dead zones, it is favorable to install tuyeres on both sides of the furnace bottom centerline. Subsequent investigations revealed that maintaining a certain range for the difference in tuyere angles between the two rows of tuyeres strikes a balance between the enhancement of agitation performance and the extension of refractory lining lifespan. Apart from tuyere arrangements, tuyere diameter and bath depth emerged as influential factors in bath agitation performance. A relatively reduced tuyere diameter and a deeper bath are suggested to enhance fluid motion within the low-velocity regions, thereby improving mixing behavior. While melt density was observed to exert a relatively modest influence on bath agitation, it was noted that lower melt viscosity contributes to enhanced melt fluidity, improved agitation performance, and a weakened impact on refractory lining. It is noteworthy that copper bottom blown smelting technologies have undergone extensive optimization through resource-intensive onsite experiments, without systematic theoretical guidance. Conclusions derived from the simulation presented in this thesis offer valuable references for industrial practice, presenting diverse fundamental principles governing the bath flow field. Furthermore, the CFD modeling provides the industry with important modeling information, as the furnace structure parameters were selected from a commonly employed range, thereby ensuring the usefulness of the simulation results for broad application in SKS furnaces.en
dc.format.extent83 + app. 71
dc.identifier.isbn978-952-64-1595-6 (electronic)
dc.identifier.isbn978-952-64-1594-9 (printed)
dc.identifier.issn1799-4942 (electronic)
dc.identifier.issn1799-4934 (printed)
dc.identifier.issn1799-4934 (ISSN-L)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/124734
dc.identifier.urnURN:ISBN:978-952-64-1595-6
dc.language.isoenen
dc.opnHeikkinen, Eetu-Pekka, Prof., University of Oulu, Finland
dc.publisherAalto Universityen
dc.publisherAalto-yliopistofi
dc.relation.haspart[Publication 1]: Song, Kezhou; Jokilaakso Ari. 2021. CFD Modeling of Multiphase Flow in an SKS Furnace: The Effect of Tuyere Arrangements. Metallurgical and Materials Transactions B 52, 1772-1788. Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202105267027. DOI: 10.1007/s11663-021-02145-2
dc.relation.haspart[Publication 2]: Song, Kezhou; Jokilaakso Ari. 2022. CFD Modeling of Multiphase Flow in an SKS Furnace with New Tuyere Arrangements. Metallurgical and Materials Transactions B 53 (1), 253-272. Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202202091839. DOI: 10.1007/s11663-021-02362-9
dc.relation.haspart[Publication 3]: Song, Kezhou; Jokilaakso Ari. 2022. The CFD Modeling of Multiphase Flow in an SKS Furnace: The Effect of Tuyere Diameter and Bath Depth. JOM 74 (4), 1488-1498. Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202204192848. DOI: 10.1007/s11837-021-05143-6
dc.relation.haspart[Publication 4]: Song, Kezhou; Jokilaakso Ari. 2023. CFD Modeling of Multiphase Flow in an SKS Furnace: The Effect of Melt Density and Viscosity. Chemical Engineering Journal Advances, 2023:100496. DOI: 10.1016/j.ceja.2023.100496
dc.relation.ispartofseriesAalto University publication series DOCTORAL THESESen
dc.relation.ispartofseries223/2023
dc.revBrink, Anders, Prof., Åbo Akademi University, Finland
dc.revChibwe, Deside, Dr., BlueScope, Australia
dc.subject.keywordSKS furnaceen
dc.subject.keywordmultiphase flowen
dc.subject.keywordmulti-fluid VOFen
dc.subject.keywordstanding waveen
dc.subject.keywordmodel validationen
dc.subject.keywordCFD modelingen
dc.subject.otherMetallurgyen
dc.titleCFD modeling of multiphase flows in bottom blown copper smelting furnaceen
dc.typeG5 Artikkeliväitöskirjafi
dc.type.dcmitypetexten
dc.type.ontasotDoctoral dissertation (article-based)en
dc.type.ontasotVäitöskirja (artikkeli)fi
local.aalto.acrisexportstatuschecked 2023-12-19_1430
local.aalto.archiveyes
local.aalto.formfolder2023_12_04_klo_09_04

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