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Refractory for cement
产品描述
Physical and chemical properties of common MgO—Cr2O3
Brick ,direct bonded MgO—Cr2O3 brick and Cr2O3—MgO brick
|
Brands |
Chemical composition |
g/cm3 Bulk Den sity |
%App arent por osity |
Mpa Cold crushing strength |
oC Refract oriness under load |
oC% Thermal expansion |
Thermal shock resitance (1100°C-Water) cycle |
|||
| Mg0 | Si02 | Cr203 | ||||||||
|
Common Mg0- Cr203 brick |
Mge -20 | ≥40 | A | ≥20 | A | ≤22 | ≥30 | ≥1550 | A |
A
|
| Mge -16 | ≥45 | A | ≥16 | A | ≤22 | ≥30 | ≥1550 | A |
A
|
|
| Mge -12 | ≥55 | A | ≥12 | A | ≤21 | ≥35 | ≥1550 | A |
A
|
|
| Mge -8 | ≥60 | A | ≥8 | A | ≤21 | ≥35 | ≥1530 | A |
A
|
|
|
Direct bonded Mg0- Cr203 brick |
DMC -9A | ≥70 | ≤28 | ≥9 | ≥2.98 | ≤19 | ≥40 | ≥1600 | ≤1.03 | ≥4 |
|
Cr203- Mg0 brick |
Mge -20 | ≥42 | A | ≥20 | A | ≤21 | ≥30 | ≥1580 | A | ≥8 |
| Mge -25 | ≥38 | A | ≥25 | A | ≤22 | ≥30 | ≥1590 | A | ≥8 | |
| Mge -30 | ≥35 | A | ≥30 | A | ≤22 | ≥30 | ≥1610 | A | ≥8 | |
Physical and chemical of magnesic spinel brick
|
ltem
|
MA—1
|
MA—2
|
|
Mg0%
|
≥70
|
≥75
|
|
Al2O3
|
≥6
|
≥10
|
|
Apparent porosity
|
≤18
|
≤20
|
|
Bulk dencity
|
≥2.80
|
≥2.90
|
|
MPa CCS
|
≥40
|
≥40
|
|
Refractoriness under load
|
≥1620
|
≥1620
|
|
Thermal shock resistance(1100oC-water)cycle
|
≥10
|
≥10
|
Physcal and chemical of magnesia spinel compound brick
|
Item
|
Target
|
|
|
weight part
|
larget
|
|
|
MgO%
|
≥78
|
-
|
|
AI2O3
|
8-10
|
≥55
|
|
Apparent porosity
|
≤20
|
-
|
|
g/cn3
|
≥2.90
|
≤1.0
|
|
MPa CCS
|
≥40
|
≥5.5
|
|
Refractoriness under load
|
≥1550
|
-
|
|
Reheating linera change
|
0~+0.1
|
<2(1400oC)
|
|
W/m.k(350±25oC)Thermal conductivity
|
<2.0
|
<0.45
|
|
MPa CCS
|
15
|
|
Light-weight insulation castables
|
Name of poduct
|
Light-weight castable
|
Insulation castable
|
||||
|
Brand
|
LT-10
|
LT-10A
|
LT-12NL
|
LT-13NL
|
LT-14NL
|
|
|
Maximum service temperature
|
1000
|
1000
|
1200
|
1300
|
1400
|
|
|
（g/cm3）
Bulk density(110℃)
|
0.6-0.7
|
1.00-1.10
|
1.60
|
1.65
|
1.65
|
|
|
（MPa）Moduius of rupture
|
110℃x24
|
≥0.5
|
≥1.5
|
≥4
|
≥4
|
≥4
|
|
800℃x3h
|
≥0.5
|
≥1
|
≥
3(1100℃x3h) |
≥3(1100℃x3h)
|
≥
3 (1100℃x3h) |
|
|
（MPa）Cold crushing strength
|
110℃x24
|
≥2
|
≥5
|
≥20
|
≥20
|
≥20
|
|
800℃x3h
|
≥1.5
|
≥3
|
≥
15(1100℃x3h) |
≥15(1100℃x3h)
|
≥
15 (1100℃x3h) |
|
|
Thermal expansion at 800℃
|
-1.50
|
-0.70
|
≥
－0.3 (1100℃x3h) |
≥－0.3(1100℃x3h)
|
≥
－0.3 (1100℃x3h) |
|
|
Thermal conductivity at 350℃
|
≤0.23
|
≤0.28
|
≤0.40
|
≤0.45
|
≤0.45
|
|
|
water required
|
80－90
|
35－45
|
16－20
|
16－20
|
16－20
|
|
|
Forming method
|
Ramming or vibration
|
Ramming or vibration
|
Vibration
|
Vibration
|
Vibration
|
|
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