Izindaba

Isingeniso

Ezimbonini ezisezingeni lokushisa eliphezulu—kusukela ekwenzeni insimbi kuya ekukhiqizeni ingilazi—izinto eziphikisayo ziwumgogodla wokusebenza okuphephile nokusebenza kahle. Phakathi kwalokhu,izitini mullitezigqame ngokuzinza kwazo okushisayo, ukumelana nokugqwala, namandla okusebenza. Ukuqonda ukuhlukaniswa kwawo kanye nezicelo kubalulekile emabhizinisini afuna ukwandisa isikhathi sokuphila kwemishini nokunciphisa izindleko zokusebenza. Lesi sihloko sihlukanisa izinhlobo ezibalulekile zezitini ze-mullite kanye nokusetshenziswa kwazo komhlaba wangempela, sikusiza wenze izinqumo ezinolwazi ngezidingo zakho zezimboni.

Ukuhlukaniswa kwezitini ze-Mullite

Izitini ze-Mullite zihlukaniswa ngokusekelwe ezinqubweni zokukhiqiza kanye nezingxenye ezengeziwe, ngayinye ihambisana nezidingo ezithile zezimboni.

1. Izitini ze-Sintered Mullite

Yenziwe ngokuxuba i-alumina ne-silica ehlanzekile kakhulu, ibumba ingxube, futhi iyishise emazingeni okushisa angaphezu kuka-1600°C, izitini ze-mullite ezine-sintered ziziqhayisa ngesakhiwo esiminyene kanye ne-porosity ephansi (imvamisa engaphansi kuka-15%). Lezi zici zibenza bakwazi ukumelana nokugqokwa okuhle kakhulu kanye nokumelana nokushaqeka okushisayo—okulungele izindawo ezinokushintshashintsha kwezinga lokushisa okuvamile. Ukusetshenziswa okujwayelekile kufaka phakathi ama-linings okhilo be-ceramic, izitofu ze-blast furnace ezishisayo, namakamelo okushisa ama-boiler.

2. I-Fused-cast Mullite Bricks

Ikhiqizwe ngokuncibilikisa izinto zokusetshenziswa (i-alumina, i-silica) esithandweni sikagesi se-arc (ngaphezu kuka-2000°C) futhi iphonsa ingxube encibilikisiwe ibe yisikhunta, izitini ze-mullite ezihlanganisiwe zinamazinga okungcola aphansi kakhulu kanye nokuhlanzeka okuphezulu kwekristalu. Ukumelana kwawo okuphakeme nokuguguleka kwamakhemikhali (isb., engilazini encibilikisiwe noma ama-slags) kuwenza abe yisinqumo esingcono kakhulu sezinto ezivuselela iziko lengilazi, obhavu bezingilazi ezintantayo, kanye nezinye izinto zokusebenza ezichayeka emithonjeni yezindaba encibilikisiwe enolaka.

3. I-Lightweight Mullite Bricks

Idalwe ngokwengeza ama-pore-forming agents (isb., sawdust, graphite) ngesikhathi sokukhiqiza, izitini ze-mullite ezingasindi zine-porosity engu-40-60% kanye nokuminyana okuphansi kakhulu kunezinhlobo ze-sintered noma ezihlanganisiwe. Inzuzo yabo eyinhloko i-conductivity ephansi yokushisa (0.4-1.2 W/(m·K)), okunciphisa ukulahlekelwa ukushisa. Zisetshenziswa kabanzi njengezendlalelo zokufakelwa eziko, eziko, nasezinsizeni zokwelashwa kokushisa, lapho isisindo nokusebenza kahle kwamandla kubaluleke kakhulu.

4. Izitini zeZircon Mullite

Ngokufaka i-zircon (ZrSiO₄) ekuxubeni kwezinto ezingavuthiwe, izitini ze-zircon mullite zithola ukusebenza okuthuthukisiwe kwezinga lokushisa eliphezulu-zingakwazi ukumelana nezinga lokushisa elifika ku-1750 ° C futhi zimelana nokuguguleka kusuka kuma-slags ane-acidic. Lokhu kuwenza afanelekele izindawo ezinokhahlo njengeziko lokuncibilikisa insimbi engeyona ayoni (isb., amaseli okunciphisa i-aluminiyamu) kanye nezindawo zokushiswa kukasimende ezijikelezayo.

Izicelo ze-Mullite Bricks

Ukuhlukahluka kwezitini ze-Mullite kuzenza zibaluleke kakhulu ezimbonini eziningi ezisezingeni eliphezulu.

1. Imboni Yensimbi

Ukukhiqizwa kwensimbi kubandakanya amazinga okushisa aphezulu (afinyelela ku-1800 ° C) kanye nama-slags agqwalayo. Izitini ze-sintered mullite zikala izitofu ezishisayo, lapho ukumelana kwazo nokushisa kuvimbela ukuqhekeka ekushiseni/kupholise ngokushesha. Okuhlukile kwe-Fused-cast kuvikela ama-ladle nama-tundishes, kunciphisa ukuguguleka kwe-slag nokwelula impilo yemishini ngo-20–30% uma kuqhathaniswa nezindawo zokuzicisha ezivamile.

2. Imboni Kasimende

Izikhiya zikasimende ezijikelezayo zisebenza ku-1450-1600°C, nama-alkaline slags adala ingozi enkulu yokuguguleka. Izitini ze-Zircon mullite ziklelisa indawo evuthayo yomlilo, zimelana nokuhlaselwa kwe-alkali nokugcina ubuqotho besakhiwo. Izitini ze-mullite ezingasindi nazo zisebenza njengezendlalelo zokufakelwa, zinciphisa ukusetshenziswa kwamandla ngo-10-15%.

3. Imboni Yengilazi

Ingilazi encibilikisiwe (1500–1600°C) igqwala kakhulu, okwenza izitini ze-mullite ezihlanganisiwe zibe zibalulekile ekuvuseleleni isithando sengilazi nezindwangu zamathangi. Zivimbela ukungcoliswa kwengilazi futhi zandise isikhathi sokusebenza kwesithando somlilo siye eminyakeni engu-5-8, kusukela eminyakeni engu-3-5 nezinye izinto.

4. Ezinye Izimboni

Ekuncibilikeni kwensimbi okungeyona insimbi (i-aluminium, ithusi), izitini ze-zircon mullite zimelana nokuguguleka kwensimbi encibilikisiwe kanye ne-slag. Kumakhemikhali e-petrochemicals, izitini ze-sintered mullite ziklebhula iziko ngenxa yokuqina kwazo okushisayo. Ku-ceramics, izitini ze-mullite ezingasindi zivalela iziko, zehlisa ukusetshenziswa kwamandla

Isiphetho

Izinhlobo ezihlukahlukene zezitini ze-Mullite—i-sintered, i-fused-cast, i-lightweight, ne-zircon—ihlangabezana nezidingo ezihlukile zezimboni ezisezingeni eliphezulu. Ukusuka ekuthuthukiseni ukusebenza kahle kwesithando somlilo sensimbi kuya ekunwebeni impilo yesithando somlilo esiyingilazi, baletha izinzuzo ezibonakalayo: ubude besikhathi semishini yokusebenza, izindleko eziphansi zamandla, kanye nesikhathi esincishisiwe sokuphumula. Njengoba izimboni ziphishekela ukukhiqiza okuphezulu nokusimama, izitini ze-mullite zizohlala ziyisixazululo esibalulekile. Khetha uhlobo olulungile lohlelo lwakho lokusebenza, futhi uvule amandla abo aphelele.