Egyptalum prebaked anode plant was started up in June 2000 and currently produces 172000 tpy. that is considered the designed capacity. The plant consists of:
- 1-Green Mill : using a Buss K600 continuous mixer with a capacity of 35 tph and an Erich cooler to prepare paste for a FCB Vibrocompactor where the green anode is obtained by compaction of the paste a vibrating mold. The green anode is manufactured from three carbon constituents , calcined coke (65 %) , recycled baked products (20 %) and coal tar pitch (15 %)
2- Anode Baking Furnace :It is aluminium Pechiney open ring type furnace , it consists of 66 sections and each section have 9 flue walls and 8 pits in which green anode blocks is baked. Baked carbon anodes is ready for use in pot lines after rodding.The produced baked anodes meets the specifications that attached below.
Physical and Chemical Properties of Prebaked Carbon Anodes
No
|
Properties
|
Unit
|
Value
|
|
1
|
S
|
%
|
< 3
|
|
2
|
Si
|
ppm
|
< 300
|
|
3
|
Ca
|
ppm
|
< 250
|
|
4
|
Fe
|
ppm
|
< 400
|
|
5
|
Ni
|
ppm
|
< 250
|
ISO 12980
|
6
|
V
|
ppm
|
< 250
|
Method
|
7
|
Na
|
ppm
|
< 425
|
ISO 12980
|
8
|
Ash
|
%
|
< 0.6
|
ISO 12980
|
9
|
Apparent Density
|
gm/cm3
|
> 1.52
|
ISO 12980
|
10
|
Density in He
|
gm/cm3
|
> 2.06
|
ISO 12980
|
11
|
Specific Electrical Resistance
|
µΩm
|
< 60
|
ISO 11713
|
12
|
Flexural Strength
|
N/mm2
|
8-14
|
ISO 12986 - 1
|
13
|
Compressive Strength
|
kg/cm2
|
> 350
|
ISO 12986 - 1
|
14
|
Young's Modulus
|
Gpa
|
6-10
|
ISO 12986 - 1
|
15
|
Air Permeability
|
Np
|
< 2
|
ISO 15906
|
16
|
Thermal Conductivity
|
w/mk
|
> 2.8
|
ISO 15906
|
17
|
Porosity
|
%
|
< 2.7
|
ISO 15906
|
18
|
AIR Reactivity
|
Residue
|
%
|
> 65
|
ISO 12989 - 1
|
19
|
Dust
|
%
|
< 8
|
ISO 12989 - 1
|
20
|
Loss
|
%
|
Balance
|
ISO 12989 - 1
|
21
|
CO2 Reactivity
|
Residue
|
%
|
> 85
|
ISO 12988 - 1
|
22
|
Dust
|
%
|
< 6
|
ISO 12988 - 1
|
23
|
Loss
|
%
|
Balance
|
ISO 12988 - 1
|