- 07
- Oct
Njerwa zazitali za alumina zazing’ono zotentha
Njerwa zazitali za alumina zazing’ono zotentha
Kutsika pang’ono ndi njerwa zapamwamba za alumina ndi zinthu zapamwamba kwambiri zopangira zopangidwa ndi alumina, fused corundum, ndikuphatikizira mullite ngati zopangira zazikulu.
Mawonekedwe
1. Refractoriness
Kukonzanso kwa njerwa zazitali kwambiri komanso zamtundu wa alumina ndizokwera kwambiri kuposa njerwa zadothi komanso njerwa za silika, mpaka 1750 ~ 1790 ℃, yomwe ndi chinthu chapamwamba chomata.
2. Kutentha kwachangu
Chifukwa mankhwala okhala ndi alumina okwera amakhala ndi Al2O3 yambiri, zosowa zochepa, komanso matayala ocheperako, kutentha komwe kumachepetsa kutentha kumakhala kwakukulu kuposa njerwa zadongo. Komabe, chifukwa makhiristo a mullite samapanga maukonde, kutentha kochepetsa kutentha sikukhala kofanana ndi njerwa za silika.
3. Kukaniza kwa slag
Njerwa zazing’ono komanso zotayidwa kwambiri zimakhala ndi Al2O3 yochulukirapo, yomwe ili pafupi ndi zida zotsalira, ndipo imatha kukana kukokoloka kwa slag ndi slagine slag. Chifukwa ili ndi SiO2, kuthekera kokana slag yamchere ndikofooka kuposa slag acidic.
ntchito
Amagwiritsidwa ntchito makamaka pakapangidwe kazitsulo zophulika, ng’anjo zotentha, nsonga zamagetsi zamagetsi, ng’anjo zophulika, ng’anjo zowotchera, ndi maiko ozungulira.
polojekiti | Njerwa zotsika zazitali za alumina | |||||||
DRL-155 | DRL-150 | DRL-145 | DRL-140 | DRL-135 | DRL-130 | DRL-127 | ||
Al2O3,% ≥ | 75 | 75 | 65 | 65 | 65 | 60 | 50 | |
Zikuwoneka porosity,% ≤ | 20 | 21 | 22 | 22 | 22 | 22 | 23 | |
Kuchuluka kwa kuchuluka, g / cm3 | 2.65-2.85 | 2.65-2.85 | 2.50-2.70 | 2.40-2.60 | 2.35-2.30 | 2.30-2.50 | 2.30-2.50 | |
Kuponderezana mphamvu kutentha, Mpa ≥ | 60 | 60 | 60 | 55 | 55 | 55 | 50 | |
Zowonongeka% (0.2Mpa, 50h) ≤ | 1550 ℃ 0.8 |
1500 ℃ 0.8 |
1450 ℃ 0.8 |
1400 ℃ 0.8 |
1350 ℃ 0.8 |
1300 ℃ 0.8 |
1270 ℃ 0.8 |
|
Kusintha kwa mzere wobwerera% | 1550 ℃, 2h | 0.1--0.2 | 0.1--0.2 | 0.1--0.2 | ||||
1450 ℃, 2h | 0.1--0.2 | 0.1--0.4 | 0.1--0.4 | 0.1--0.4 |