Environmental Engineering Reference
In-Depth Information
Input Data Example 2
Input data example 2
1400
Description & Setting
1. Furnace type
2. Targeted discharging temperature
3. Temperature difference of the slab
at discharge
4. Form of semi-finished steel
Setting
1200
Conventional furnace
Exists
1000
800
Exists
600
Upper furnace
temperature
Top surface
Center
Slab
400
Line
Column
200
External loop
Not defined
0
20
5
0
3
4
0
0
10
20
30
40
Middle loop
Inner loop
RG heat recovery rate
Time min
Zone length
1
2
3
4
5
6
7
8
9
10 1 2 3
4
1
Input data
2
Used steel type
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
Conditions of Reheating Furnaces
Setting
(Enter a letter in the Setting space)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
<1>
<2>
<3>
Furnace
Rimmed steel
Killed steel
Low carbon steel
Middle carbon steel
Middle carbon steel
Eutectoid steel
Eutectoid steel
Carbon tool steel
1.5%Mn steel
3.5%Ni steel
3.5%Ni steel 1%Cr steel
3.5%Ni steel 1%Cr steel
3.5%Ni steel 1%Cr-Mo steel
1%Cr steel
1%Cr-Mo steel
Si-Mn steel
13%Mn steel
28%Ni steel
18-8 stainless steel
12%Cr stainless steel
12%Cr tool steel
18-4-1 High speed steel
Zone length
m
8.0
5.0
5.0
12.0
10.0
width
Furnace length 40
10.00
CG
Upper
0.85
0.89
0.85
0.85
0.85
0.85
Height
CG
Lower
0.89
0.89
0.89
0.89
2.00
Depth
Upper zone furnace temperature at charging
Upper zone furnace temperature at discharging
Lower zone furnace temperature at charging
Lower zone furnace temperature at discharging
C
C
C
500
800
1,100
1,300
1,204
1,204
1,204
1,204
2.00
800
1,100
1,300
1,300
500
800
1,100
1,300
C
800
1,100
1,300
1,300
Combustion
1or0
0
0
0
RG rate of exhaust gas
RG heat recovery rate
%
%
0
0
0
0
0
0
0
0
0
0
Recuperator heat recovery rate
%
50
kcal/hm K
2
kcal/hm K
2
Upper furnace body radiation heat
Lower furnace body radiation heat
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
2
Heat loss by cooling water
0.80
0.80
0.80
kcal/hm K
Conditions of semi-finished
steel
Form
1
0: round billets, 1:Slab, 2:Billet
Reheating tonnage
Discharging temperature(target)
Slab temperature difference at discharging
Thickness/Diameter of steel
Width of steel ( 0 for round billet)
Length of steel
Intervals of charging steels
Temperature of steel at charging
ton/h
200
1200
25
250
1950
9600
100
36.0
C
C
mm
mm
mm
mm
C
If set, soaking zone heat pattern is automatically modified
If set, heatking zone heat pattern is automatically modified
Slab unit weight 36.7 t
The time in the furnace 215.1
Combustion Conditions
Ingredients of fuel gas
N2
O2
CO
CO
2
H
2
H
2
OCH
4
C
2
H
4
C
2
H
6
C
3
H
8
25.0
0.0
17.1
10.9
29.6
0.0
15.5
1.2
0.6
0.0
Atmospheric Temperature
Air ratio
C
25.0
1.10
Heating
value
steam
steam
temperature
for Liquid fuel, minus value
to the air ratio
CHSON
2
O Ash
kg/kg
85.60
13.40
0.10 0.81
0.09 0.09
0
10,260
loop calculation
External loop
0
15
100
Middle loop
20
0
40
60
80
CASE
I
II
III
IV
V
VI
VII
VIII
IX
X
Internal loop
5
4
5
75
10
12.5
15 17.5
20
25
30
35
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