336
W. Wu et al.
Table 2 (continued)
No.
Item
Unit
Value
10
Slag quantity
kt/a
300
11
Steam quantity of waste heat boiler
t/h
65–70
12
Operating pressure of waste heat boiler
MPa
5.0
Table 3 Main technical and economic indexes of bullion electrolytic refining
No.
Item
Unit
Value
1
Lead ingot capacity (Pb: 99.994)
kt/a
400
2
Working days
d/a
330
3
Specifications of the continuous copper removal furnace
m 2
20
4
The number of the continuous copper removal furnace
pic
2
5
Industrial oxygen consumption
Nm 3 /t Pb
20–25
6
Natural gas consumption
Nm3/t Pb
10–12
7
Residual anode ratio
%
38–40
8
Average electrolysis current density
A/m 2
140
9
Current efficiency
%
93
10
Electrobath voltage
V
0.35–5
11
Recovery rate
Pb
%
99
Ag
%
99.5
Au
%
99.5
Sb
%
99
References
1. Editorial committee of Lead-Zinc Metallurgy (2003) Lead-Zinc Metallurgy [M]. Beijing Science
Press
2. Dongbo L, et al. (2003) The application of oxygen Bottom Blowing and Blasting Furnace
smelting for Pb &Zn smelting [J]. Non-Ferrous Metals (Smelting)
3. Weifeng L, et al. (2010) Current status and progress of Pb smelting technology in China [J].
China Nonferrous Metallurgy
4. Rong Z (2015) The application of continuous de-coppering furnace in lead bullion pyrometallurgical refining [J]. Shanxi Metallurgy