Yintoni ixabiso le izitena refractory kwiziko metallurgical?

Yintoni ixabiso le izitena refractory kwiziko metallurgical? Lo inokuba ngumbuzo ukuba abahlobo kwishishini metallurgical kufuneka bazi. Izitena eziphikisayo ezisetyenziswa ngokuqhelekileyo kwizitena ze-metallurgical ziquka izitena ze-silica, izitena ze-corundum mullite, kunye nezitena ze-magnesia-iron spinel. Kukho iintlobo ezininzi zezitena eziphikisayo kwi-metallurgical furnaces, kwaye ixabiso elithile kufuneka lixoxisane nomenzi ukuba akhethe isitena esifanelekileyo esichasayo. Oku kulandelayo kwazisa ezi zitena zomlilo ezisetyenziswa ngokuqhelekileyo.

1. Ukubunjwa kwesigaba samaminerali kwizitena ze-silica ikakhulukazi ziqulunqwe nge-tridymite kunye ne-cristobalite, kunye nenani elincinci le-quartz kunye ne-vitreous. Kwiqondo lokushisa eliphantsi, umthamo we-tridymite, i-cristobalite kunye ne-quartz eseleyo iguquka kakhulu ngenxa yokutshintsha kwe-crystal shape. Ngoko ke, ukuzinza kwe-thermal yezitena ze-silica kumaqondo okushisa aphantsi kubi. Ngexesha lokusetyenziswa, kufuneka ifudunyezwe ngokukhawuleza kwaye ipholile ngaphantsi kwe-800 ° C ukuphepha ukuqhekeka. Ngoko ke, ayifanelekanga ukusetyenziswa kwiikonti ezinotshintsho olukhawulezayo lobushushu obungaphantsi kwama-800°C.

2. Isitena se-Corundum mullite sisixhobo se-refractory esiphezulu se-alumina esakhiwe nge-corundum kunye ne-mullite. Izitena ze-Corundum mullite zibhekisela kwiimveliso eziphikisayo ezenziwe ngococeko oluphezulu okanye izinto ezicocekileyo. Inamandla alungileyo obushushu obuphezulu, ukusebenza ngokunyuka kobushushu obuphezulu, ukuxhathisa ukothuka kwe-thermal kunye nokumelana nomhlwa. Zombini izitovu zomlilo eziqhumayo kunye nezitovu zeceramic zifanelekile.

3. Izitena ze-Magnesium-iron spinel zenziwe nge-high-quality synthetic spinel njengezinto ezibonakalayo kwaye zicutshungulwe yinkqubo ekhethekileyo. Imveliso ineempawu zamandla acinezelayo aphezulu, uzinzo olulungileyo lokothuka kwe-thermal, ukusebenza kakuhle kwe-thermal creep, kunye nobushushu obuphezulu bokuthambisa umthwalo. Kwangaxeshanye, ikwanodibaniso oluthe ngqo lwezitena ze-magnesia-chrome kwaye kulula ukunamathela eluswini lweziko, olusombulula ingxaki yokungcoliseka kwendalo ye-chromium enehexavalent eveliswe kwinkqubo yokusebenzisa izitena ze-magnesia-chrome kwizitofu zesamente.