Semi-graphitic bottom cathodecarbon block for aluminum electrolysis

  
 

Physical-chemical Properties Table
Designation
　　
BSL-1
BSL-2
Ash content
not more than
7
8
Specific resistance
40
43
Electrolytic expansion ratio
0.7
1.0
Compressive strength
not less than
32
30
Bulk density
1.56
1.54
Real density
1.90
1.88
Open-pore volume（%）
　　
20
21
Thermal expansion ratio（% ）
230℃
0.08
0.08
500℃
0.25
0.25
950℃
0.5
0.5
Yong module
≤
10
10
Folding strength
≥
7.5
7.5
Note: Physical-chemical Properties is not less than BSL-2.