Njerwa Yoyezera Kutentha kwa Dongo la Clay imapangidwa ndi dongo lamoto ngati zopangira ndi dongo lapulasitiki monga chomangira kenako ndikuwonjezera chowotcha kapena chotulutsa thovu powombera. Kutsekereza dongo kumatchinga kuoneka kwa porosity ndikokwera pafupifupi 40-85% ndipo kachulukidwe kake ndi kochepera 1.5 g/cm3. Njerwa zamoto zadongo zimagwiritsidwa ntchito kwambiri ngati zida zotchinjiriza mu uvuni wa mafakitale kuti muchepetse kutentha kwa ng'anjo, kupulumutsa mphamvu ndikuwunikira zida zotenthetsera.
Njerwa Zoyikira Zowala Zolemera Zadongo zimapangidwa kuchokera ku dongo loyera kwambiri lamoto ndi zomangira, pozimitsa kutentha kwambiri. midadada kutchinjiriza dongo ndi otsika mtengo refractory kutchinjiriza njerwa ndi mkulu ntchito. Ubwino waukulu wa dongo kutchinjiriza chipika ndi mkulu refractoriness pansi katundu, otsika mizere kukulitsa coefficients, zabwino matenthedwe kugwedezeka kukana ndi mphamvu mwamphamvu kukana kukokoloka. Zomwe zimapangidwa ndi zida zamoto zamtundu wapamwamba kwambiri pansi pa kutentha kwakukulu molingana ndi muyezo wokhazikika wadziko lonse, womwe umakhala ndi kachulukidwe wochuluka, mphamvu yayikulu, kutsika kwamafuta otsika komanso kutsika kodetsedwa.
Dongo kutchinjiriza firebrick ndi argillaceous mankhwala ndi pafupifupi 30 ~ 40% Al2O3 okhutira. chomwe chimapangidwa ndi 50% dongo lofewa ndi 50% chamotte yolimba molingana ndi granularity ina yofunikira kusakanikirana ndikuwotcha pa 1300 ~ 1400 ℃ kutentha kwakukulu mutatha kuumba ndi kuyanika. Dongo kutchinjiriza moto njerwa waukulu mchere zikuchokera zikuphatikizapo kaolinite (Al2O3 · 2SiO2 · 2H2O) ndi 6 ~ 7% zosafunika (K, Na, Ca, Ti, Fe okusayidi).
Zinthu | NG-0.6 | NG-0.8 | NG-1.0 | NG-1.3 | NG-1.5 | |
Maximum Service Temperature | 1200 | 1280 | 1300 | 1350 | 1400 | |
Kuchulukirachulukira, g/cm3 | 0.6 | 0.8 | 1.0 | 1.3 | 1.5 | |
Zowoneka Porosity,% | 70 | 60 | 55 | 50 | 40 | |
Cold Crushing Strength (Mpa) ≥ | 2.0 | 2.5 | 3.0 | 4.0 | 6.0 | |
Kusintha kwa Linear Kusintha (%)℃×12h ≤ | 1300 ℃ -0.5 | 1350 ℃ -0.5 | 1350 ℃ -0.9 | 1350 ℃ -0.9 | 1350 ℃ -0.9 | |
Thermal conductivity W/(m·K) | 600 ℃ | 0.16 | 0.45 | 0.43 | 0.61 | 0.71 |
800 ℃ | 0.18 | 0.50 | 0.44 | 0.67 | 0.77 | |
Al2O3 | 40 | 40 | 40 | 40 | 42 | |
SiO2 | 1.5 | 1.5 | 1.5 | 2 | 2 | |
Fe2O3 | 55 | 55 | 55 | 55 | 55 |
Chida chotchinjiriza dongo chimagwiritsidwa ntchito makamaka pakutchingira malo otentha kapena kuchirikiza zigawo zotchingira kutentha kwa zida zina zowumitsa. Zingwe zomangira kapena zotchingira kutentha kwa mafakitale, monga ng'anjo za ethylene pyrolysis, ng'anjo za tubular, ng'anjo zosintha za ammonia, ma jenereta a gasi ndi ng'anjo zotentha kwambiri za shullte, etc.