Transcript
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Temperature and velocity distribution in different section of slag pool
（ a） x=0m （ b） x=0.2m
（ c） x=0.4m （ d） x=0.6m
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Velocity distribution in slag pool
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Turbulence kinetic energy of different section of slag pool
（ a） x=0m （ b） x=0.2m
（ c） x=0.4m （ d） x=0.6m
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（ a） x=0m （ b） x=0.2m
（ c） x=0.4m （ d） x=0.6m
Effective heat transfer coefficient in different section of slag pool
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DimensionlessGroup
MeaningValue
Lab scale Indust. scale Our work
1.7kA/0.05 18kA/0.33 25kA/0.487
Lorenz ForceInertial Force 51 52 15
Buoyancy ForceInertial Force 15 38 44
Inertial Force Viscous Force 1400 5900 11320
Rate of heat generationRate of heat transport by
convection0.26 0.05 0.0069
2
200
1 HM
20
2 TLgM
0
ReLN
0
020
LTCJNp
T
L0=Reference Length=mould diameter;I0=Current density;H0=I0/L0;J0=I0/L02
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Temperature distribution of slab ingot
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-0.15 -0.10 -0.05 0.00 0.05 0.10 0.15
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Z/m
Y/m
liquid line solid line
Diagram of metal pool at X=0m
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0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Z/m
X/m
liquid line solid line
diagram of metal pool at y=0m
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In the experimental production process, the surface quality of wide
side is good , but surface of narrow side is not, as we can see from the
picture below.
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One possible reason is narrow side is far away from electrode, so we
widen them.
W=685mm
W=710mm
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（ a） x=0m （ b） x=0.2m
（ c） x=0.4m （ d） x=0.6m
Temperature and velocity distribution in different section of slag pool
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Temperature distribution of slab ingot
Electrode width W=710mm×2 Electrode width W=685mm×2
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-0.15 -0.10 -0.05 0.00 0.05 0.10 0.15
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Z/
m
Y/m
liquid line of 1370mm solid line of 1370mm liquid line of 1420mm solid line of 1420mm
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Z/m
X/m
liquid line of 1370mm solid line of 1370mm liquid line of 1420mm solid line of 1420mm
Diagram of metal pool using different electrodes
Diagram of metal pool at X=0m diagram of metal pool at y=0m
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R=600mm
R=300mm
Another possible reason is radius of narrow side is large, and we decrease it
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（ a） x=0m （ b） x=0.2m
（ c） x=0.4m （ d） x=0.6m
Temperature and velocity distribution in different section of slag pool
Progress
Temperature distribution of slag ingot
Radius of narrow side R=300mm Radius of narrow side R=600mm
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-0.15 -0.10 -0.05 0.00 0.05 0.10 0.15
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Z/m
Y/m
liquid line of R600mm solid line of R600mm liquid line of R300mm solid line of R300mm
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Z/m
X/m
liquid line of R600mm solid line of R600mm liquid line of R300mm solid line of R300mm
Diagram of metal pool using different R
Diagram of metal pool at X=0m diagram of metal pool at y=0m
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