(1)chemical composition:
Reduction:13% max
Fe:o.4% max
Al2o3:45% min
Na:0.3% max
So4+:1.5% max
(2)phisical character:
Pore volume:0.35ml/g min
Specific surface:250m2/g min
Abrasion index:2.5% max
Fineness:
0--40um:20v% max
0---149um:92v% min
(3)micro-activity:
800 degrees/4hr, 100%vapor:70
25 kg/bag
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