Environmental Engineering Reference
In-Depth Information
TABLE 5.12
Basic Specifications of the Reheating Furnace for Slabs of 285 ton/h
High Performance
Reheating Furnace
Conventional
Reheating Furnace
Description
1.
Heating performance, ton/h
285
285
2.
Slab size
Thickness, mm
255
255
Width, mm
960
960
Length, mm
9,016
9,016
3.
Charging temperature, ˚C
20
20
4.
Discharging temperature
Thickness direction average minimum
1,200
1,200
temperature, ˚C
Cross section average, ˚C
1,220
1,255
5.
Principal figures on the furnace size
Effective furnace length, mm
30,000
38,000
Internal width of furnace, mm
10,000
10,000
Furnace height upper zone, mm
1,800
2,400
Lower zone, mm
2,000
2,200
Load on the furnace floor, kg/m 2 /h
1,054
832
6.
Number of combustion controlled zones
6
6
7.
Designed furnace temperature
Preheating zone ˚C
1,300
1,300
Heating zone ˚C
1,380
1,380
Soaking zone ˚C
1,330
1,330
8.
Heating time, h
1.8
2.3
Upper furnace temperature
Top surface temperature
Center
1400
1200
1000
800
600
400
200
0 0
5
10
15
20
25
30
35
40
Furnace length,
m
FIGURE 5.42 Slab temperature as a function of furnace length in a high performance furnace.
 
 
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