- 16
- Sep
Njerwa ya nangula
Njerwa ya nangula
Ubwino wazogulitsa: mphamvu yayikulu, kukana kwamphamvu kwa kukokoloka, kusungunuka kwakukulu.
Ntchito yamagetsi: Imasewera ndi mafupa polumikizana.
Mafotokozedwe Akatundu
Njerwa zomangirira amatchedwanso njerwa zopachika. Amapangidwa ndi zopangira, zopangidwa ndi atolankhani kapena kutsanulira, kenako sintered kutentha kwambiri. The aluminiyamu zili njerwa nangula ndi oposa 55%, ndi zili aluminiyamu wa njerwa nangula angafikire 75%. Kutentha kofewa kwamtundu wamtundu wa njerwa kufika 1550 ℃, chomwe ndi chinthu chabwino kwambiri chomanga njerwa. Komabe, mwambiri, ma alumina a 55% amasankhidwa chifukwa njerwa za nangula zokhala ndi 55% zimasinthasintha. Njerwa za nangula zimathandiza kwambiri pomanga makoma owongoka, omwe amatha kukonza kukhulupirika kwa makoma owongoka.
Kuphatikiza apo, ziyenera kudziwika kuti njerwa zomangirira zimagwiritsidwa ntchito kupangira zida zotsalira. Katundu wazitsulo za njerwa ayenera kukhala wogwirizana ndi zomwe zimapangidwazo, ndikukula ndikuwongolera kuyenera kukhala kosasinthasintha, kuti muphatikize kuyanjana ndi zotayika ndikuwonjezera moyo m’ng’anjo. Njerwa ya nangula ndi mtundu watsopano wa njerwa zoyimbira zomwe zimagwiritsidwa ntchito mu mafakitale, makamaka, zimakhudzana ndi njerwa ya nangula yomwe imagwiritsidwa ntchito padenga lazitsulo. Pakhoma limaperekedwa ndi nthiti m’mbali mwa kutalika kwa malo amtundu umodzi wa nangula. Nthitizo zitakhazikitsidwa, chifukwa cha kulimbitsa ndi kukoka kwa nthitizo, kulimba kwamphamvu ndi kolimba kwa nangula kumalimbikitsidwa kwambiri, ndipo kupsinjika komwe kumayambira poyambira Kuthira nthiti sikungapitirire kudutsa, ndiye nangula njerwa za mtundu uwu ndizovuta kuzimitsa.
Kapangidwe ndi zomangamanga za njerwa zogwiritsira ntchito ziyenera kutsatira mfundo izi:
1. Makonzedwe amamangidwe a njerwa ayenera kutsimikizika kutengera kusintha komanso kutentha kwa kusintha kwa kutentha ndi kukula kwa khoma lolunjika, nthawi zambiri osachepera 6 block / m2.
2. Onetsetsani njerwa zomwe zimangika musanamalize. Ngati njerwa za nangula zili ndi ming’alu ya mabowo yomwe imakhudza mphamvu yonse ya njerwa, sayenera kugwiritsidwa ntchito ndipo iyenera kutayidwa motsimikiza.
3. Ntchito yomanga ikakhala kuti ili pafupi ndi njerwa, njerwa zizikonzedweratu pasadakhale kuti zitsimikizire malo omwe njerwayo izikhalira. Gawo lowotcherera la chipolopolo chachitsulo limatsukidwa ndi burashi ya waya. Ndodo yowotcherera imagwiritsidwa ntchito pamagawo otsekemera, ndipo kuwotcherera kumakhala kolimba. Mangirirani chubu.
4. Mukamanga njerwa, ikani mbedza, ndipo lembani bwalo lamiyala ndi zotsekera zomverera ndikulikulunga mwamphamvu kuti muteteze nangula wina.
Zizindikiro zakuthupi ndi zamankhwala
Udindo / Index | Njerwa zapamwamba za alumina | Secondary mkulu alumina njerwa | Atatu milingo alumina njerwa | Njerwa zapamwamba kwambiri za alumina |
LZ-75 | LZ-65 | LZ-55 | LZ-80 | |
AL203 ≧ | 75 | 65 | 55 | 80 |
Fe203% | 2.5 | 2.5 | 2.6 | 2.0 |
Kuchulukana kachulukidwe g / cm2 | 2.5 | 2.4 | 2.2 | 2.7 |
Kuponderezana kwamphamvu kutentha kwa firiji MPa> | 70 | 60 | 50 | 80 |
Katundu wofewetsa kutentha ° C | 1520 | 1480 | 1420 | 1530 |
Kutulutsa kotsutsa ° C> | 1790 | 1770 | 1770 | 1790 |
Zikuoneka porosity% | 24 | 24 | 26 | 22 |
Kutentha kwamuyaya kwa kusintha kwa mzere% | -0.3 | -0.4 | -0.4 | -0.2 |