iimpawu izitena ezikhaphukhaphu eziphezulu ze-alumina

Izitena ezikhaphukhaphu eziphezulu ze-alumina zidla ngokubizwa ngokuba zizitena ze-thermal insulation refractory, ezikwabizwa ngokuba zizitena ze-thermal insulation refractory. Injongo yalo ebalulekileyo kukufudumeza ubushushu kunye nomsebenzi wokugcina ubushushu. Ekusetyenzisweni okuqhelekileyo, akuhambelani ngokuthe ngqo nobushushu besithando somlilo, kwaye luhlobo lwemveliso yezitena eziphikisayo ezikufutshane nodonga lwesithando somlilo kwaye zinefuthe lokufudumala kunye nokugcinwa kobushushu.

Izitena ezikhaphukhaphu eziphezulu zealumina sesinye sezona zixhobo zilungele ukunqanda ubushushu ngoku. Ineempawu zamandla acinezelayo aphezulu, i-thermal conductivity ephantsi, ukusebenza kakuhle kwe-insulation, kunye nexabiso eliphantsi. Isetyenziswe ngokubanzi kwiitoni ze-ceramic, ii-roller kilns, kunye ne-shuttle kilns. Ii-kilns zohlobo, iitoni zodonga, zikwasetyenziswa kwiindawo ezahlukeneyo zokufudumeza, ii-coking furnaces kunye nezinye izixhobo ezishushu, izixhobo zokulungisa ubushushu kushishino lwentsimbi kunye nentsimbi.

Izitena ezikhaphukhaphu eziphezulu ze-alumina zikwabizwa ngokuba zizitena eziphezulu ze-alumina. Izinto ezikhanyelayo ezikhanyelayo kunye nomxholo we-alumina ngaphezu kwe-48%, ngokukodwa ihlanganiswe ne-mullite kunye nesigaba seglasi okanye i-corundum. Ubuninzi bobuninzi yi-0.4～1.35g/cm3. I-porosity yi-66% ~73%, kwaye amandla oxinzelelo yi-1～8MPa. Ukuxhathisa ukothuka kwe-Thermal kungcono. Ngokuqhelekileyo, i-alumina ephezulu ye-bauxite i-clinker yongezwa kunye nodongwe oluncinci, emva kokuba lucolile, lugalelwe kwaye lubunjwe ngendlela yodaka ngendlela yokuvelisa igesi okanye indlela ye-foam, kwaye igxothwe kwi-1300-1500 ° C. Ngamanye amaxesha i-alumina ye-industrial ingasetyenziselwa ukutshintsha inxalenye ye-bauxite clinker. Isetyenziselwa i-lining kunye ne-heat insulation layer ye-masonry kilns, kunye neendawo ezingagqwaliswanga kwaye zikhutshulwe zizixhobo ezityhidiweyo ezinobushushu obuphezulu. Xa udibana ngqo nedangatye, iqondo lobushushu bomphezulu aliyi kuba ngaphezulu kwe-1350°C.