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| 项目 Item | LZ-75 | LZ-65 | LZ-55 | |
| Al2O3 (%) | ≥75 | ≥65 | ≥55 | |
| 耐火度(℃)Refractoriness | ≥1790 | ≥1770 | ≥1770 | |
|
0.2Mpa 荷重软化温度(KD℃) 0.2Mpa Softening Temp Under Load |
≥1520 | ≥1500 | ≥1470 | |
|
重烧线变化 Permanent Linear Change |
1500℃×2h | +0.1/-0.3 | +0.1/-0.4 | +0.2/-0.5 |
|
显气孔率 (%) Apparent Porosity |
≤23 | ≤22 | ≤20 | |
|
常温耐压强度(Mpa) Cold Crushing Strength |
≥75 | ≥65 | ≥55 | |
The high alumina is divided into different kinds according to the alumina content and usage, they are widely used in glassfurnace, metallurgy, electric furnace, cement kiln and other heat-engineering equipments.
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