- 22
- Sep
Njerwa ya aluminium yayikulu kwambiri
Njerwa ya aluminium yayikulu kwambiri
Njerwa ya aluminiyumu yapadziko lonse lapansi ndi yopanda mbali, yomwe imatha kukana kukokoloka kwa slag acidic ndi slagine slag. Chifukwa ili ndi SiO2, kuthekera kwake kokana slag yamchere ndiyofooka kuposa slag acidic. Kuphatikiza apo, kukana kwa slag kwa zinthu zamtundu wa alumina kumakhudzanso kukhazikika kwa zinthu mu slag. Nthawi zambiri, akamaumba mopanikizika kwambiri ndikuwombera kotentha kwambiri, zopangidwa ndi porosity zochepa zimakhala ndi kukana kwakukulu kwa slag.
Chipilala cha njerwa zapadziko lonse lapansi chimakhala chozungulira, ndipo mathero ena ndi poyambira. Ngakhale itakhala yolimba bwanji, imatha kusintha ndikusunthika. Chifukwa ilibe shaft ndipo imakhala yopatuka pang’ono kukula kwake, itha kupangidwanso mozungulira. Amatchedwa arc wapadziko lonse lapansi, njerwa zamtunduwu zimagwiritsidwa ntchito mu ladle. Njerwa zamtundu wa arc high aluminium refractory zimagwiritsidwa ntchito ngati gawo lamkati la chidebe chachitsulo. Poyamba anali dongo. Tsopano pang’ono ndi pang’ono m’malo mwa njerwa zapamwamba za alumina. Njerwa yapamwamba ya alumina universal arc ndi silicate ya aluminiyamu yokhala ndi alumina yoposa 48%. Kutsutsa kwabwino. Amapangidwa ndikupangidwa kuchokera ku bauxite kapena zinthu zina zopangira zokhala ndi alumina zambiri. Mkulu matenthedwe bata, refractoriness pamwamba 1770 ℃. Kukana kwa slag kuli bwino.
Njerwa zokhazikitsira pansi zimagwiritsidwa ntchito ngati bolodi la ladle. Poyamba anali dongo, koma tsopano amalowedwa m’malo ndi njerwa zapamwamba za alumina. Malinga ndi momwe ntchitoyi imagwirira ntchito, timakhulupirira kuti njerwa za arc zili ndi zabwino izi:
1. Mphamvu yayikulu yothinana komanso kumva kuwawa kwa firiji. Kukana kwamankhwala kwabwino, makamaka slag acidic. Kutentha kwakukulu kotsika kumakhala kotsika. Ntchito yabwino yotsutsa-kuvula.
2. Malo olumikizanawo amatha kuyenda momasuka ndipo amatha kuyenda mmbuyo ndi mtsogolo kuti asinthe kuzungulira poika njerwa, chifukwa chake ndikosavuta kupanga njerwa zoyambilira, ndipo kusiyana kwa njerwa kumatha kufikira 1 mm. Kukula kwa njerwa zolimba kwachepetsedwa, ndipo mphamvu ya chitsulo chachitsulo imakulanso mofananamo.
3. Malo olumikizana ndi njerwa zapadziko lonse lapansi ndi ochepa, omwe ndi 70% poyerekeza ndi olumikizana molunjika a njerwa zokhazokha, zomwe zimachepetsa kugwiritsa ntchito matope obwezeretsa ndikusunga mtengo wamagwiritsidwe. Kukula kwake kumatha kusinthidwa kutalika kwake kulikonse.
3. Kutalika kwa moyo wautali, ndi njerwa zadongo zowonjezekera zowonjezeka ndi 210%.
4. Kuchokera pakuchepetsa kwamankhwala ogwiritsira ntchito mayunitsi, zikuwonetsanso kutsogola kwazitali kwambiri zotayidwa padziko lonse lapansi. Ndipo kuchepetsedwa kwa kugwiritsidwa ntchito kwamagulu kumatha kufotokozera kuchepa kofananira kwa ma inclusions azitsulo pazitsulo zosungunuka.
5. Mukayambiranso kugwiritsa ntchito, onetsetsani kuti kutentha kwa gawo la njerwa yayikulu ya alumina kupita ku slag ndi chitsulo chosungunuka kuli bwino kuposa njerwa zadothi zingapo.
6. Njerwa za arc zokhazokha zitha kugwiritsidwa ntchito poika njerwa chifukwa chozungulira kumapeto kwake. Yendetsani mmbuyo ndi mtsogolo kuti musinthe kuzungulira kwake, kotero ndikosavuta kupanga njerwa zoyambilira, ndipo kusiyana kwa njerwa kumatha kufikira 1 mm.
7. Malo olumikizana ndi njerwa zapadziko lonse lapansi ndi ocheperako, omwe ndi 70% poyerekeza ndi olumikizana owongoka a njerwa zoyaka, kotero kuti kukokoloka kwachitsulo chosungunuka kumayenda chokwera ndi chotsika ndikulowa polumikizira njerwa kukonzedwa.
8. Chifukwa chakukula kwa njerwa zosanjikiza, makulidwe a njerwa amatha kuchepetsedwa, komanso kuchuluka kwa ng’oma yachitsulo kumakulanso mofananira.
9. Chifukwa chokhala ndi moyo wautali komanso kuwumba njerwa kosavuta, ntchito yomanga ng’oma zachitsulo kuseri kwa ng’anjo yachepa ndipo kuchuluka kwa magudumu achitsulo kumakulitsidwa.
Zizindikiro zakuthupi ndi zamagetsi za njerwa zapadziko lonse lapansi:
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 |