Iintlobo ezi-7 zeCorundum Refractory Materials ezisetyenziswa rhoqo kwiRefractory Castables

01 SiCorundum edibeneyo
I-corundum e-Sintered, ekwaziwa ngokuba yi-sintered alumina okanye i-semi-molten alumina, yi-clinker enganyangekiyo eyenziwe nge-calcined alumina okanye i-industrial alumina njengezinto eziluhlaza, ezicoliweyo zibe ziibhola okanye imizimba eluhlaza, kwaye zicocwe kubushushu obuphezulu be-1750 ~ 1900°C.

I-alumina exutyiweyo equlethe ngaphezulu kwe-99% ye-aluminium oxide yenziwe kakhulu nge-corundum ecolekileyo efanayo edityaniswe ngokuthe ngqo. Izinga lokukhupha igesi lingaphantsi kwe-3.0%, ubuninzi bomthamo bufikelela kwi-3.60%/imitha ye-cubic, ukuchasana kwayo kusondele kwinqanaba lokunyibilika kwe-corundum, inozinzo oluhle lomthamo kunye nozinzo lweekhemikhali kubushushu obuphezulu, kwaye ayikhukuliswa ngumoya ophantsi, iglasi enyibilikisiweyo kunye nesinyithi esinyibilikisiweyo. , amandla alungileyo oomatshini kunye nokumelana nokuguguleka kubushushu obuqhelekileyo kunye nobushushu obuphezulu.

02I-Corundum edibeneyo
I-Fused corundum yi-corundum yokwenziwa eyenziwe ngokunyibilikisa umgubo we-alumina ococekileyo kwisithando sombane esishushu kakhulu. Ineempawu ze-high melting point, amandla aphezulu oomatshini, ukumelana kakuhle nokutsha kwe-thermal shock, ukumelana okunamandla kokugqwala kunye ne-linear expansion coefficient encinci. I-Fused corundum sisixhobo esiluhlaza sokwenza izinto ezikhethekileyo ezichasene ne-refractory. Ngokuyintloko ziquka i-fused white corundum, i-fused brown corundum, i-sub-white corundum, njl.njl.

03I-Corundum emhlophe edibeneyo
I-corundum emhlophe exutyiweyo yenziwe ngomgubo we-alumina ococekileyo kwaye inyibilikiswa kubushushu obuphezulu. Inombala omhlophe. Inkqubo yokunyibilikisa i-corundum emhlophe ngokusisiseko yinkqubo yokunyibilikisa nokuphinda iguqulwe umgubo we-alumina wezimboni, kwaye akukho nkqubo yokunciphisa. Umxholo we-Al2O3 awukho ngaphantsi kwe-9%, kwaye umxholo wokungcola umncinci kakhulu. Ubunzima buncinci kancinci kune-brown corundum kwaye ukuqina kuphantsi kancinci. Idla ngokusetyenziswa ukwenza izixhobo ezirhabaxa, iiseramikhi ezikhethekileyo kunye nezinto eziphambili ezichaseneyo.

04I-Corundum eBrown edibeneyo
I-corundum emdaka exutyiweyo yenziwe nge-bauxite ephezulu ye-alumina njengeyona nto iphambili kwaye ixutywe ne-coke (anthracite), kwaye inyibilikiswa kwisithando sombane esishushu kakhulu kumaqondo obushushu angaphezu kwama-2000°C. I-corundum emdaka exutyiweyo inobume obunzima kunye nobunzima obuphezulu kwaye isetyenziswa rhoqo kwi-ceramics, kwi-castings echanekileyo nakwizinto eziphucukileyo ezichaseneyo.

05I-Corundum engaphantsi komhlophe
I-corundum engaphantsi komhlophe iveliswa ngokunyibilikisa i-bauxite yodidi olukhethekileyo okanye yodidi lokuqala phantsi kweemeko zokunciphisa umoya kunye neemeko ezilawulwayo. Xa inyibilika, yongeza i-arhente yokunciphisa (ikhabhoni), i-arhente yokumisa (iifayile zesinyithi) kunye ne-arhente yokususa iikhabhoni (isikali sesinyithi). Ngenxa yokuba ukwakheka kwayo kweekhemikhali kunye neempawu zomzimba zisondele kwi-corundum emhlophe, ibizwa ngokuba yi-corundum engaphantsi komhlophe. Ubuninzi bayo bungaphezulu kwe-3.80g/cm3 kwaye i-porosity yayo ebonakalayo ingaphantsi kwe-4%. Yinto efanelekileyo yokwenza izinto eziphucukileyo ezichaseneyo kunye nezinto ezinganyangekiyo.

06I-Chrome corundum
Ngokusekelwe kwi-corundum emhlophe, kongezwa i-22% ye-chromium, kwaye yenziwa ngokunyibilikisa kwisithando sombane se-arc. Umbala umfusa-bomvu. Ubunzima buphezulu kancinci kune-corundum emdaka, bufana ne-corundum emhlophe, kwaye ubunzima obuncinci bunokuba yi-2200-2300Kg/mm2. Ubunzima buphezulu kunobo be-corundum emhlophe kwaye buphantsi kancinci kunobo be-corundum emdaka.

07I-Zirconium Corundum
I-Zirconium corundum luhlobo lwe-corundum yokwenziwa eyenziwe ngokunyibilikisa i-alumina kunye ne-zirconium oxide kubushushu obuphezulu kwisithando sombane se-arc, ukuyinyibilikisa, ukuyipholisa, ukuyityumza kunye nokuyicoca. Isigaba esiphambili sekristale se-zirconium corundum yi-α-Al2O3, isigaba sesibini sekristale yi-baddeleyite, kwaye kukwakho nesigaba esincinci seglasi. Imo yekristale kunye nolwakhiwo lwe-zirconium corundum zizinto ezibalulekileyo ezichaphazela umgangatho wayo. I-Zirconium corundum ineempawu zobulukhuni obuphezulu, ubulukhuni obuhle, amandla aphezulu, ubume obunzima, amandla okusila aqinileyo, iipropati zeekhemikhali ezizinzileyo, kunye nokumelana okuhle nokutshiswa kobushushu. Isetyenziswa kakhulu kumashishini e-abrasives kunye nezinto ezichaseneyo. Ngokwesixa sayo se-zirconium oxide, inokwahlulwa ibe ngamanqanaba amabini emveliso: i-ZA25 kunye ne-ZA40.