298
L. Zhang et al.
(continued)
Item
Unit
Design indicators Production
indicators
Pb content in the
slag
%
20.32
30–40
Cooling water
temperature
difference
°C
5
1.9
Slag temperature
°C
1100
1050–1200
Tuyere life
Year
2
>2
Reduction stage Area
m 2
7
7
Slag yield
t/d
220
380–420
Secondary lead
t/d
42
110
Oxygen
consumption
m 3 /t 渣
79.15
86
Oxygen
concentration
%
60
55–60
Coal rate
%
11.16
8.6
Flux rate
%
0.95
9
Dust rate
%
8.71
12
Specific capacity
of the furnace
t/m 2 d
31.43
54.29–58.57
Slag yield
t/a
151
228–252
Pb in the slag
%
1.98
1.5–2.4
Zn in the slag
%
14.7
15–17
Cooling water
temperature
difference
°C
5
3.5
Tuyere life
Year
2
≥2
Fuming state
Area
m 2
6
6
Slag throughput
t/d
150.77
228–252
Zn in secondary
Zn oxide
%
59.11
>60
Specific hearth
throughput
t/m 2 d
25.13
38–42
Pulverized coal
rate
%
23.27
~21.5
Lead in slag
%
0.21
<0.1
Zn in slag
%
1.54
<1