The Latest Development of Oxygen Bottom Blowing …
335
Table 2 The Main technical and economic indexes of bullion smelting
No.
Item
Unit
Value
SKS section
1
Specifications of the bottom blowing furnace
m
ø5 × 28
2
Working days
d/a
330
3
Processing capacity of concentrate
kt/a
800
4
Lead grade of the mixed materials
%
40–45
5
Sulfur grade of the mixed materials
%
15–18
6
Industrial oxygen consumption
Nm 3 /t
100–110
7
Ash rate
%
12–15
8
SKS Slag
t/a
~740
9
Lead content in SKS oxide slag
%
40–48
10
Steam quantity of waste heat boiler
t/h
30–35
11
Operating pressure of waste heat boiler
MPa
5.0
RSKS section
1
Specifications of the reduction smelting furnace
m
ø5 × 28
2
Working days
d/a
330
3
Processing capacity of RSKS slag
kt/a
~740
4
Ratio of oxygen to coal
Nm 3 /kg
0.4–0.5
5
Rate of pulverized coal
%
8–10
6
Ash rate
%
8–12
7
Secondary bullion porduction
kt/a
~410
8
Pb in bullion
%
94–96
9
Slag quantity
kt/a
~350
10
Lead content of reducing slag
t/a
2–3
11
Zinc content of reducing slag
t/a
12–15
12
Steam quantity of waste heat boiler
t/h
35–40
13
Operating pressure of waste heat boiler
MPa
5.0
Fuming furnace smelting section
1
Specifications of the fuming furnace
m 2
32
2
Working days
d/a
330
3
Processing capacity of reducing slag
kt/a
~350
4
Zin oxide dust production
%
15–18
5
Zinc in zinc oxide dust
%
55–60
6
Ability of fumer
t/m 2 d
30–35
7
Percentage of coal powder
%
16–20
8
Pb in fumer slag
%
0.2–0.5
9
Zn in fumer slag
%
2–3
(continued)
335
Table 2 The Main technical and economic indexes of bullion smelting
No.
Item
Unit
Value
SKS section
1
Specifications of the bottom blowing furnace
m
ø5 × 28
2
Working days
d/a
330
3
Processing capacity of concentrate
kt/a
800
4
Lead grade of the mixed materials
%
40–45
5
Sulfur grade of the mixed materials
%
15–18
6
Industrial oxygen consumption
Nm 3 /t
100–110
7
Ash rate
%
12–15
8
SKS Slag
t/a
~740
9
Lead content in SKS oxide slag
%
40–48
10
Steam quantity of waste heat boiler
t/h
30–35
11
Operating pressure of waste heat boiler
MPa
5.0
RSKS section
1
Specifications of the reduction smelting furnace
m
ø5 × 28
2
Working days
d/a
330
3
Processing capacity of RSKS slag
kt/a
~740
4
Ratio of oxygen to coal
Nm 3 /kg
0.4–0.5
5
Rate of pulverized coal
%
8–10
6
Ash rate
%
8–12
7
Secondary bullion porduction
kt/a
~410
8
Pb in bullion
%
94–96
9
Slag quantity
kt/a
~350
10
Lead content of reducing slag
t/a
2–3
11
Zinc content of reducing slag
t/a
12–15
12
Steam quantity of waste heat boiler
t/h
35–40
13
Operating pressure of waste heat boiler
MPa
5.0
Fuming furnace smelting section
1
Specifications of the fuming furnace
m 2
32
2
Working days
d/a
330
3
Processing capacity of reducing slag
kt/a
~350
4
Zin oxide dust production
%
15–18
5
Zinc in zinc oxide dust
%
55–60
6
Ability of fumer
t/m 2 d
30–35
7
Percentage of coal powder
%
16–20
8
Pb in fumer slag
%
0.2–0.5
9
Zn in fumer slag
%
2–3
(continued)