it has high bulk density, low porosity and low creep under load at high temperature, it can be used as lining materials in anode bake furnace.
|
item |
unit |
cm-lr-s |
cm-lr-1 |
cm-lr-2 |
test method |
|
ai2o3 |
% |
≥42 |
≥42 |
≥40 |
gb 6900 |
|
fe2o3 |
% |
≤1.0 |
≤1.8 |
≤2.0 |
gb 6900 |
|
k2o na2o |
% |
≤0.6 |
≤0.8 |
≤1.2 |
gb 6900 |
|
cao mgo |
% |
≤0.6 |
≤0.7 |
≤1.0 |
gb 6900 |
|
apparent porosity |
% |
≤16 |
≤19 |
≤19 |
gb/t2997-2000 (iso5017-1988) |
|
bulk density |
g/cm3 |
≥2.35 |
≥2.2 |
≥2.2 |
gb/t2997-2000 (iso5017-1988) |
|
cold crushing strength |
mpa |
≥40 |
≥40 |
≥30 |
gb/t5072-2008 (iso10059-1-1992) |
|
folding strength at 12000c*0.5hours |
mpa |
≥10 |
≥10 |
- |
gb/t3002-2004 (iso5013-1985) |
|
folding strength at 13500c*0.5hours |
mpa |
≥6 |
≥4 |
- |
gb/t3002-2004 (iso5013-1985) |
|
refractoriness under load 2kg5/cm3 |
0c |
≥1450 |
≥1450 |
≥1410 |
gb/t5989-1998 (iso1893-2005) |
|
creep at 12800c from 0 to 25hrs under load of 0.2mpa, |
% |
≤0.4 |
≤0.4 |
≤0.5 |
gb/5073-2005 (iso3187-1989) |
|
reheating linear change |
% |
0.1~0.2 (14500c,2h) |
0.1~0.2 (14500c,2h) |
0.1~0.2 (14000c,2h) |
(iso2478-1987) |
|
thermal expansion between 20c 0-10000c |
% |
≤0.7 |
≤0.7 |
≤0.7 |
gb/t7320-2008 (en993-19:2004) |