Ukusetyenziswa kweFused Corundum Brick kwiFloat Glass Melting Furnace

Izitena ezidibeneyo ze-corundumzinyibilike i-alumina kwisithando sombane se-arc kwaye ziphonswe kwimodeli echaziweyo yesimo esithile, i-annealed kunye nobushushu obugcinwe, kwaye emva koko iqhutywe ukufumana imveliso efunekayo. Inkqubo yemveliso jikelele kukusebenzisa ubunyulu obuphezulu be-aluminium calcined (ngaphezu kwe-95%) kunye nenani elincinci lezongezo, ubeke izithako kwiziko lombane le-arc, kwaye uziphose kwiimbumba ezenziwe ngaphambili emva kokunyibilika kwiqondo lokushisa elingaphezulu kwe-2300 ° C. , kwaye emva koko uzigcine zifudumele Emva kokuba i-annealing, ikhutshwe, kwaye i-blank-out-out iba yimveliso egqityiweyo ehlangabezana neemfuno emva kokusebenza okubandayo okuchanekileyo, ukuhlanganiswa kwangaphambili kunye nokuhlolwa.

Izitena ezidibeneyo ze-corundum zihlukaniswe zibe ziintlobo ezintathu ngokweendlela ezahlukeneyo ze-crystal kunye nobuninzi be-alumina: eyokuqala yi-α-Al2O3 njengesigaba esiphambili se-crystal, esibizwa ngokuba yi-α-corundum izitena; okwesibini ngu-α-Al2 Izigaba ze-crystal ze-O 3 kunye ne-β-Al2O3 ikakhulu kumxholo ofanayo, obizwa ngokuba yi-αβ corundum izitena; uhlobo lwesithathu ubukhulu becala β-Al2O3 crystal izigaba, ezibizwa β corundum izitena. Izitena ezidibeneyo ze-corundum ezisetyenziswa ngokuqhelekileyo kwi-float glass melting furnaces ziluhlobo lwesibini kunye nesithathu, ezizezi zitena ezidibeneyo ze-αβ corundum kunye nezitena ze-β corundum. Eli nqaku liza kugxininisa kwiimpawu ezibonakalayo kunye neekhemikhali zezitena ezidibeneyo ze-αβ corundum kunye nezitena ze-β corundum kunye nokusetyenziswa kwazo kwi-float glass melting furnaces.

1. Uhlalutyo lwentsebenzo yezitena ezidibeneyo ze-corundum

1. 1 Isitena esixutyiweyo se-αβ corundum

Izitena ezidibeneyo ze-αβ corundum zenziwe malunga ne-50% α-Al2 O 3 kunye ne-β-Al 2 O 3, kwaye iikristale ezimbini zidibene ukuze zenze isakhiwo esixineneyo, esinokumelana ne-alkali enamandla kakhulu. Ukumelana ne-corrosion kwiqondo lokushisa eliphezulu (ngaphezulu kwe-1350 ° C) mbi kakhulu kunezitena ezixutywe ze-AZS, kodwa kumaqondo okushisa angaphantsi kwe-1350 ° C, ukuxhathisa kwayo kwe-corrosion kwiglasi etyhidiweyo ilingana nezitena ezidibeneyo ze-AZS. Ngenxa yokuba ingenayo i-Fe2 O 3, i-TiO 2 kunye nezinye izinto ezingcolileyo, isigaba seglasi ye-matrix sincinci kakhulu, kwaye into yangaphandle njengamaqamza ayinakwenzeka xa idibanisa neglasi etyhidiweyo, ukuze iglasi ye-matrix ingangcoliswa. .

Izitena ezixubileyo ze-αβ corundum zixinene kwi-crystallization kwaye zine-corrosion egqwesileyo yokumelana neglasi etyhidiweyo engaphantsi kwe-1350 ° C, ngoko ke zisetyenziswa ngokubanzi kwidama lokusebenza nangaphaya kweeglasi ezinyibilikayo zeglasi, ngokuqhelekileyo kwi-launders, izitena zomlomo, izitena zesango, njl. Izitena ezixutyiweyo zecorundum ehlabathini zenziwa ngcono nguToshiba waseJapan.

1.2 Isitena esidityanisiweyo se-β corundum

Izitena ezidibeneyo ze-β-corundum zenziwe malunga ne-100% β-Al2 O 3, kwaye zineplate enkulu efana ne-β-Al 2 O 3 i-crystalline structure. Enkulu kwaye engenamandla. Kodwa kwelinye icala, inokumelana ne-spalling elungileyo, ngakumbi ibonisa ukuxhathisa okuphezulu kakhulu kokutya kumphunga owomeleleyo wealkali, ngoko ke isetyenziswa kulwakhiwo oluphezulu lweglasi yokunyibilika komlilo. Nangona kunjalo, xa ishushu kwi-atmospheric enomxholo ophantsi we-alkali, iya kusabela kunye ne-SiO 2, kwaye i-β-Al 2 O 3 iya kubola ngokulula kwaye ibangele ukuncipha kwevolumu kubangele ukuqhekeka kunye nokuqhekeka, ngoko isetyenziswe kwiindawo ezikude. Ukusasazwa kwezixhobo zeglasi.

1.3 Iimpawu ezibonakalayo kunye neekhemikhali zezitena ezidibeneyo ze-αβ kunye ne-β corundum

Ukubunjwa kweekhemikhali ze-fused α-β kunye ne-β corundum izitena ikakhulukazi i-Al 2 O 3, umehluko ikakhulu kwi-crystal phase composition, kwaye ukuhlukana kwi-microstructure kukhokelela kumahluko kwiipropati zomzimba kunye neekhemikhali ezifana nobuninzi bobuninzi, ukwanda kwe-thermal. i-coefficient, kunye namandla acinezelayo.

2. Ukusetyenziswa kwezitena ze-corundum ezidibeneyo kwiiglasi zokunyibilikisa iiglasi

Zombini ezisezantsi kunye nodonga lwedama zidibana ngqo nolwelo lweglasi. Kuzo zonke iindawo eziqhagamshelana ngokuthe ngqo nolwelo lweglasi, eyona propati ibalulekileyo ye-refractory i-corrosion resistance, oko kukuthi, akukho ukuphendula kweekhemikhali okwenzekayo phakathi kwezinto eziphikisayo kunye ne-glass liquid.

Kwiminyaka yakutshanje, xa uvavanya izikhombisi zomgangatho wezinto ezichasayo ezidityanisiweyo zinxibelelana ngokuthe ngqo neglasi etyhidiweyo, ukongeza kukwakheka kweekhemikhali, izikhombisi zomzimba kunye neekhemikhali, kunye nokwakheka kweeminerali, ezi zalathisi zintathu zilandelayo kufuneka zivavanywe: isalathiso sokumelana nokhukuliseko lweglasi, ukuncipha. isalathisi se-bubble kunye ne-precipitated crystallization index.

Ngeemfuno eziphezulu zomgangatho weglasi kunye nobukhulu bemveliso yesithando somlilo, ukusetyenziswa kwezitena zombane ezidibeneyo kuya kuba banzi. Izitena ezixutyiweyo ezisetyenziswa ngokuqhelekileyo kwiiglasi zokunyibilika kweglasi zichungechunge lwe-AZS (Al 2 O 3 -ZrO 2 -SiO 2) izitena ezidibeneyo. Xa izinga lokushisa le-AZS lingaphezulu kwe-1350 ℃, ukuxhathisa kwe-corrosion yi-2 ~ 5 amaxesha e-α β -Al 2 O 3 izitena. Izitena ezixubileyo ze-αβ corundum ziqulunqwe ngokusondeleyo kwi-α-alumina (53%) kunye ne-β-alumina (45%) i-particle fine, equkethe inani elincinci lesigaba seglasi (malunga ne-2%), egcwalisa ii-pores phakathi kweekristale, ngokucoceka okuphezulu, kwaye ingasetyenziswa njengenxalenye yokupholisa izitena zodonga lwechibi kunye nenxalenye yokupholisa i-pavement engezantsi Izitena kunye nezitena zomthungo njl.

Ukubunjwa kwamaminerali kwezitena ezixubileyo ze-αβ corundum ziqulethe kuphela inani elincinci lesigaba seglasi, elingayi kukhupha kwaye lingcolise ulwelo lweglasi ngexesha lokusetyenziswa, kwaye lunokumelana nokugqwala okuhle kunye nokumelana nobushushu obuphezulu obungaphantsi kwe-1350 ° C. Yiyo indawo yokupholisa yeglasi yokunyibilika kweziko. Yeyona imathiriyeli efanelekileyo yeendonga zetanki, umzantsi wetanki kunye nezihlamba zeziko lokunyibilikisa iglasi edadayo. Kwiprojekthi yobunjineli yeglasi edadayo enyibilikayo, isitena esidityanisiweyo se-αβ corundum sisetyenziswa njengesitena sodonga lwechibi lwendawo yokupholisa yesithando somlilo seglasi. Ukongezelela, izitena ezidibeneyo ze-αβ corundum nazo zisetyenziselwa izitena zokuhamba kunye nokugubungela izitena ezidibeneyo kwicandelo lokupholisa.

Isitena esixutywe nge-β corundum yimveliso emhlophe eyenziwe nge-β -Al2 O 3 i-crystals enqabileyo, equkethe i-92% ~ 95% Al 2 O 3, kuphela ngaphantsi kwe-1% yesigaba seglasi, kwaye amandla ayo okwakhiwa abuthathaka ngenxa ye-crystal lattice. . Phantsi, i-porosity ebonakalayo ingaphantsi kwe-15%. Ekubeni i-Al2O3 ngokwayo igcwele i-sodium ngaphezu kwe-2000 ° C, izinzile kakhulu kumphunga we-alkali kumaqondo aphezulu okushisa, kwaye ukuzinza kwayo kwe-thermal nako kuhle kakhulu. Nangona kunjalo, xa udibana ne-SiO 2, i-Na 2 O equlethwe kwi-β-Al 2 O 3 idiliza kwaye iphendule ngeSiO2, kwaye i-β-Al 2 O 3 iguqulwa ngokulula ibe yi-α-Al 2 O 3, okubangelwa umthamo omkhulu. ukushwabana , kubangela iintanda kunye nomonakalo. Ke ngoko, ilungele kuphela izakhiwo ezinkulu ezikude nothuli olubhabhayo lwe-SiO2, olunje ngomgangatho ophezulu wedama elisebenzayo leglasi enyibilikayo yomlilo, i-spout ngasemva kwendawo yokunyibilikisa kunye neparapet yayo ekufutshane, ukulinganisa iziko elincinci kunye nezinye iindawo.

Ngenxa yokuba ayisebenzi kunye neeoksidi zesinyithi zealkali eziguquguqukayo, akusayi kubakho nto inyibilikayo ephuma kumphezulu wezitena ukungcolisa iglasi. Kwiglasi edadayo yokunyibilika kwesithando somlilo, ngenxa yokuncipha ngokukhawuleza kokungena kwejelo lokuhamba kwenxalenye yokupholisa, kulula ukubangela ukuxinana komphunga we-alkaline apha, ngoko ke umjelo apha wenziwa ngezitena ezixutyiweyo ze-β ezixhathisayo. ukudleka ngomphunga wealkaline.

3. Isiphelo

Ngokusekwe kwiipropathi ezigqwesileyo zezitena ze-corundum ezidityanisiweyo ngokwemigaqo yokumelana nokhukuliseko lweglasi, ukuxhathisa amagwebu, kunye nokuxhathisa amatye, ngakumbi ubume bayo obukhethekileyo bekristale, ayingcolisi iglasi etyhidiweyo. Kukho izicelo ezibalulekileyo kwibhanti yokucacisa, icandelo lokupholisa, umgijimi, isithando somlilo esincinci kunye nezinye iindawo.