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infinite column (round billets), and two-dimensional infinite plate (billets). As shown
in Figures 5.30 to 5.32 , the heating curve varies significantly depending on the steel
form. Therefore, when inputting data, an appropriate form is selected as an approx-
imation, based on which the calculation is carried out. Temperatures along the
furnace length are obtained by calculating the temperature for each location of the
steel, converting the location to time.
1400
Upper furnace temperature
Top surface
Center
Slab size 200mm thick x 2000mm width
Reheating tonnage 200 ton/h
φ CG = 0.7
1200
1000
800
600
400
200
0 0
5
10
15
20
25
Furnace length, m
FIGURE 5.30 Slab temperature increase with furnace length.
1400
Upper furnace temperature
Top surface
Center
Bloom size 200mm thick x 200mm width
Reheating tonnage 200 ton/h
φ CG = 0.7
1200
1000
800
600
400
200
0 0
5
10
15
20
25
Furnace length, m
FIGURE 5.31 Square bloom temperature increase with furnace length.
1400
Upper furnace temperature
Top surface
Center
Billet diameter 200mm
Reheating tonnage 200 ton/h
φ CG = 0.7
1200
1000
800
600
400
200
0 0
5
10
15
20
25
Furnace length, m
FIGURE 5.32 Round billet temperature increase with furnace length.
 
 
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