STAR-CCM+ CM+ modeling ling of steel el makin ing g processes - - PowerPoint PPT Presentation

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star ccm cm modeling ling of steel el makin ing g
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STAR-CCM+ CM+ modeling ling of steel el makin ing g processes - - PowerPoint PPT Presentation

May 26, 2023 175 likes •397 views

STAR-CCM+ CM+ modeling ling of steel el makin ing g processes esses Simon mon Lo Steel el ma making g processes cesses Blast t Fur urnace ce Basi sic c Ox Oxyge ygen n Fur urnace ce (BOF OF) Continuous ntinuous casting

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STAR-CCM+ CM+ modeling ling of steel el makin ing g processes esses Simon mon Lo

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Blast t Fur urnace ce Basi sic c Ox Oxyge ygen n Fur urnace ce (BOF OF) Continuous ntinuous casting ng

Steel el ma making g processes cesses

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Bl Blas ast t furnace ace

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DEM EM - Char arging ing of par arti ticles cles

4

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Lifti ting ng of par arti ticles cles by ai air flo low

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6

With th heat at tr tran ansfer er

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Therm hermal al exp xpan ansion sion of par arti ticles cles

In Blast fur urnace ce, , the effect ect of solid d expansi ansion

  • n due

ue to temperature perature may be imp mpor

  • rta

tant nt STAR AR-CC CCM+ M+ has the capability lity

– Using variable density model

7

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SLIDE 8

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Un Unloading loading of par arti ticl cles es

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Bu Bulk lk flo low w val alidat ation ion

Un Unloading

  • ading qua

uazi-2D 2D blast fur urna nace ce – stagna nant nt zone e forma rmati tion

  • n

Pap Paper: r: Z. Zhou

  • u,

, H. Zhu, u, ISI SIJ Vol 45, 2005 05 STAR AR-CCM+ CCM+ resu sults ts in agreem eemen ent t with bot

  • th

h exper perime iment nt and independ ependen ent t code de resul ults ts 9

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Analysis ysis of volume e fracti tion

  • n distr

trib ibut ution ion

– Predicted the amount of load lifting after staring injecting air

Computation putation time me for a m milli lion n parti ticles les is get etti ting ng close to reasonab sonable le

– 1,003,146 particles – Simulated 0.2 seconds of physical time – Took ~48 hours on 96 cores – Used DEM timestep ~ 5.3E-6 s

Summar mary y of coupl pled ed DEM-CFD FD BF s F sim imulati tion

  • n

10 10

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Eu Euleri lerian an mu mult ltipha phase se mo model el

11 11

  • Full size furnace:
  • 25m height
  • 7.2m hearth diameter
  • 2D axisymmetric model
  • Multi-component Eulerian phases:

 Gas phase: CO, CO2, N2  Solid phase: Ore, Coke, Fe, Fe2O3, C

  • Two reactions:

 Fe2O3 + 3CO -> 2Fe + 3CO2  C + CO2 -> 2CO

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Tem emper peratures atures

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Fe/Ore e/Ore ma mass frac acti tions

  • ns

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CO/CO2 O/CO2 ma mass frac action tions

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Ba Basic c Ox Oxygen en Furna nace ce (B (BOF OF)

Oxygen gen is blown wn onto

  • the

e met etal al bath h to

  • xidi

idize ze elements ements su such as silicon

  • n and

phosp spho horou

  • us.

s. Due ue to stron

  • ng

g stirring ing inside ide the vessel el

  • xide

ides are transf sferred erred from

  • m met

etal al to slag.

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Liquid uid steel el is pour ur from conver erter er to ladle e throu

  • ugh

gh taphole le. Dart designe gned d to float at interface ace betw etwee een n steel el and slag. Near ar end of tapping, g, dart is suc ucked ed into

  • the taphole
  • le block

cking ng the flow and limit slag carry-over er into the ladle. e.

Ba Basic c Ox Oxygen en Furna nace ce (B (BOF OF)

Converter in tapping position

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Dar art t suck cked ed into th the ta taphole

  • le
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Cont

  • ntinuous

inuous ca casti ting ng of steel

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Cont

  • ntinuous

inuous ca casti ting ng of steel

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Cont

  • ntinuous

inuous ca casti ting ng of steel