Izitena eziphezulu zealumumina kwiziko leziko lekalika

Isitena esiphakamileyo se-alumina luhlobo lwezinto ezinqabileyo, eyona nto iphambili kule zitena ziphikisayo yi-Al2O3. Ukuba umxholo weAl2O3 ungaphezulu kwe-90%, ibizwa ngokuba yitena ye-corundum. Ngenxa yezixhobo ezahlukeneyo, imigangatho yesizwe ayihambelani ngokupheleleyo. Umzekelo, amazwe aseYurophu abeke umda osezantsi weAl2O3 umxholo wee-alumina refractories eziphezulu kwi-42%. E-China, ngokomxholo we-Al2O3 kwizitena eziphezulu ze-alumina, ihlala yahlulwe yangamabakala amathathu: Umxholo we-I──Al2O3 umxholo> 75%; Umxholo weBakala II──Al2O3 ngama-60 ～ 75%; Umxholo weBakala III──Al2O3 ngama-48- 60

Isitena esiphakamileyo se-alumina luhlobo lwezinto ezinqabileyo, eyona nto iphambili kule zitena ziphikisayo yi-Al2O3.

Ukuba umxholo weAl2O3 ungaphezulu kwe-90%, ibizwa ngokuba yitena ye-corundum. Ngenxa yezixhobo ezahlukeneyo, imigangatho yesizwe ayihambelani ngokupheleleyo. Umzekelo, amazwe aseYurophu abeke umda osezantsi weAl2O3 umxholo wee-alumina refractories eziphezulu kwi-42%. E-China, ngokomxholo we-Al2O3 kwizitena eziphezulu ze-alumina, ihlala yahlulwe yangamabakala amathathu: Umxholo we-I──Al2O3 umxholo> 75%; Umxholo weBakala II──Al2O3 ngama-60 ～ 75%; Umxholo weBakala III──Al2O3 ngama-48- 60%.

isimilo:

a. Ukujonga kwakhona

Ukuphindaphindwa kwezitena zealuminium eziphakamileyo kunezitena zodongwe kunye nezitena ezinesilica, ezifikelela kwi-1750 ~ 1790 ℃, eyinto ekumgangatho ophezulu yokuphamba.

b. Layisha ubushushu obuthambileyo

Ngenxa yokuba iimveliso zealumina eziphezulu zineAl2O3 ephezulu, ukungcola okuncinci, kunye nemizimba yeglasi encinci enefusus, umthwalo othomalalisa ubushushu uphezulu kunowezitena zodongwe. Nangona kunjalo, ngenxa yokuba amakristali e-mullite engenzi ubume benethiwekhi, ubushushu obuthomalisayo bomthwalo abukho njengobude bezitena zesilica.

c. Ukuxhathisa kweSlag

Izitena eziphakamileyo ze-alumina zine-Al2O3 engaphezulu, esondeleyo kwizinto ezingathathi hlangothi, kwaye inokuxhathisa ukhukuliseko lwe-slag ene-acid kunye ne-alkaline slag. Ngenxa yokubandakanywa kwe-SiO2, ukubanakho ukumelana ne-alkaline slag kubuthathaka kunaleyo ye-acidic slag.

Se benzisa:

Ubukhulu becala usetyenziselwa ulungelelwaniso lwamafutha okuqhushumba, amaziko ashushu ombane, izithando somlilo zombane, amaziko odubulo, amaziko okubuyisela, kunye neekilns ezijikelezayo. Ukongeza, izitena zealumnium eziphakamileyo zikwasetyenziswa ngokubanzi njengezitena ezivulekileyo zokuhlola izitovu, iiplagi zokugalela iinkqubo, izitena zemibhobho, njl. izitena eziphezulu zealumni apho izitena zodongwe zinokuhlangabezana neemfuno.