Aikace-aikace na Fused Corundum Brick a cikin Tanderun Gilashin narkewa

Fused tubalin corundumana narkar da alumina a cikin tanderun baka na lantarki kuma a jefa su cikin ƙayyadaddun samfuri na takamaiman siffa, an shafe shi da adana zafi, sannan a sarrafa su don samun samfurin da ake so. Tsarin samarwa gabaɗaya shine yin amfani da alumina mai tsabta mai tsabta (sama da 95%) da ƙaramin adadin abubuwan ƙari, sanya kayan aikin a cikin tanderun baka na lantarki, sannan a jefa su cikin gyare-gyaren da aka ƙera bayan an narke a babban zafin jiki sama da 2300 ° C. , sa'an nan kuma ci gaba da su dumi Bayan annealing, an fitar da shi, kuma abin da aka cire ya zama samfurin da aka gama wanda ya cika ka'idodin bayan aikin sanyi, pre-sembled da dubawa.

An raba tubalin corundum fused zuwa nau'i uku bisa ga nau'i daban-daban na crystal da adadin alumina: na farko shine α-Al2O3 a matsayin babban lokaci na crystal, wanda ake kira α-corundum tubalin; na biyu shi ne α-Al2 Hanyoyin crystal O 3 da β-Al2O3 sun fi yawa a cikin abun ciki guda ɗaya, wanda ake kira tubalin αβ corundum; Nau'i na uku shine mafi yawan sassan β-Al2O3 crystal, wanda ake kira tubalin β corundum. Fused corundum tubalin da aka saba amfani da su a cikin tanderun narkewar gilashin ruwa su ne nau'ikan na biyu da na uku, wato tubalin αβ corundum da tubalin β corundum. Wannan labarin zai mayar da hankali ne akan kaddarorin jiki da sinadarai na tubalin αβ corundum da aka haɗa da bulogin β corundum da aikace-aikacen su a cikin tanderun narkewar gilashin iyo.

1. Ayyukan bincike na tubalin corundum da aka haɗa

1. 1 Fused αβ corundum tubali

Fused αβ corundum tubalin sun hada da game da 50% α-Al2 O 3 da β-Al 2 O 3 , da kuma biyu lu'ulu'u ne interlaced don samar da wani sosai m tsari, wanda yana da kyau kwarai alkali lalata juriya. Juriya na lalata a babban zafin jiki (sama da 1350°C) ya ɗan yi muni fiye da na tubalin AZS ɗin da aka haɗa, amma a yanayin zafi da ke ƙasa da 1350C, juriyar lalacewarsa ga narkakken gilashin yayi daidai da na tubalin AZS da aka haɗa. Saboda ba ya ƙunshi Fe2 O 3, TiO 2 da sauran ƙazanta, lokacin gilashin matrix yana da ƙanƙanta sosai, kuma al'amuran waje kamar kumfa ba sa iya faruwa idan ya yi hulɗa da narkakkar gilashin, ta yadda gilashin matrix ba zai gurɓata ba. .

Fused αβ corundum tubalin suna da yawa a cikin crystallization kuma suna da kyakkyawan juriya na lalata gilashin da ke ƙasa 1350 ° C, don haka ana amfani da su sosai a cikin tafkin aiki da kuma bayan gilashin narkewar tanda, yawanci a cikin wanki, tubalin lebe, tubalin ƙofar, da dai sauransu. Tubalin corundum da aka haɗa a cikin duniya sun fi kyau ta hanyar Toshiba na Japan.

1.2 Fused β corundum tubali

Fused β-corundum tubalin sun ƙunshi kusan 100% β-Al2 O 3, kuma suna da babban farantin karfe-kamar β-Al 2 O 3 tsarin crystalline. Ya fi girma kuma ƙasa da ƙarfi. Amma a daya hannun, yana da kyau spalling juriya, musamman yana nuna musamman high lalata juriya ga karfi alkali tururi, don haka ana amfani da a cikin babba tsarin gilashin narkewa tanderu. Duk da haka, lokacin da aka yi zafi a cikin yanayi mai ƙananan alkali, zai amsa tare da SiO 2 , kuma β-Al 2 O 3 zai iya rushewa cikin sauƙi kuma ya haifar da raguwar ƙararrawa don haifar da raguwa da raguwa, don haka ana amfani da shi a wurare masu nisa daga. da watsar da albarkatun gilashin.

1.3 Abubuwan jiki da sinadarai na fused αβ da β corundum tubalin

A sinadaran abun da ke ciki na fused α-β da β corundum tubalin ne yafi Al 2 O 3, da bambanci ne yafi a cikin crystal lokaci abun da ke ciki, da kuma bambanci a cikin microstructure kai ga bambanci a cikin jiki da kuma sinadaran Properties kamar girma yawa, thermal fadadawa. coefficient, da matsawa ƙarfi.

2. Aikace-aikacen tubalin corundum da aka haɗa a cikin tanda narke gilashi

Duka kasa da bangon tafkin suna cikin hulɗar kai tsaye tare da ruwan gilashin. Ga duk sassan da ke tuntuɓar ruwan gilashin kai tsaye, mafi mahimmancin kadarorin kayan haɓakawa shine juriya na lalata, wato, babu wani nau'in sinadari da ke faruwa tsakanin kayan da ke da ƙarfi da ruwan gilashin.

A cikin 'yan shekarun nan, a lokacin da kimanta ingancin Manuniya na Fused refractory kayan a kai tsaye lamba tare da narkakkar gilashin, ban da sinadaran abun da ke ciki, jiki da kuma sinadaran Manuniya, da kuma ma'adinai abun da ke ciki, da wadannan uku Manuniya dole ne a tantance: gilashin yashwa juriya index, precipitated. kumfa index da precipitated crystallization index.

Tare da mafi girman buƙatun don ingancin gilashin kuma mafi girman ƙarfin samar da wutar lantarki, yin amfani da tubalin lantarki da aka haɗa zai zama mafi fadi. Tubalin da aka yi amfani da su a cikin tanderun narkewar gilashi sune jerin AZS (Al 2 O 3 -ZrO 2 -SiO 2) tubalin da aka haɗa. Lokacin da zafin jiki na bulo na AZS yana sama da 1350 ℃, juriyarsa ta lalata shine sau 2 ~ 5 na bulo α β -Al 2 O 3. Fused αβ corundum tubalin sun hada da α-alumina (53%) da β-alumina (45%) kyawawan barbashi, dauke da karamin adadin gilashin lokaci (kimanin 2%), cike da pores tsakanin lu'ulu'u, tare da babban tsarki, kuma za a iya amfani da matsayin sanyaya part pool bango tubalin da sanyaya part kasa pavement Tulun da kabu tubalin da dai sauransu.

Abubuwan ma'adinai na fused αβ corundum tubalin kawai ya ƙunshi ƙaramin adadin gilashin lokaci, wanda ba zai fita ba kuma ya gurɓata ruwan gilashin yayin amfani, kuma yana da juriya mai kyau na lalata da kyakkyawan juriya mai zafi a ƙasa 1350 ° C. sanyaya bangaren gilashin narkewar makera. Yana da madaidaicin kayan haɓakawa don bangon tanki, tankin tanki da wanki na murhun narkewar gilashin iyo. A cikin aikin injiniya na narkewar gilashin gilashin iyo, ana amfani da bulo na αβ corundum da aka haɗa azaman tubalin bangon tafkin na ɓangaren sanyaya na tanderun narkewar gilashi. Bugu da ƙari, ana amfani da tubalin αβ corundum da aka haɗa don tubalin da aka rufe da kuma rufe tubalin haɗin gwiwa a cikin sashin sanyaya.

Fused β corundum tubali ne wani farin samfurin hada da β -Al2 O 3 m lu'ulu'u, dauke da 92% ~ 95% Al 2 O 3 , kawai kasa da 1% gilashi lokaci, da kuma tsarin da ƙarfi ne in mun gwada da rauni saboda sako-sako da crystal lettice. . Low, da bayyana porosity ne kasa da 15%. Tunda Al2O3 da kanta yana cike da sodium sama da 2000 ° C, yana da ƙarfi sosai da tururin alkali a yanayin zafi mai yawa, kuma kwanciyar hankali ta thermal shima yana da kyau. Duk da haka, lokacin da ake hulɗa da SiO 2, Na 2 O da ke cikin β-Al 2 O 3 ya rushe kuma ya amsa tare da SiO2, kuma β-Al 2 O 3 yana sauƙin canzawa zuwa α-Al 2 O 3, wanda ya haifar da babban girma. raguwa , haifar da fasa da lalacewa. Sabili da haka, ya dace kawai don manyan gine-ginen da ke nesa da ƙura mai tashi daga SiO2, irin su babban tsarin tafkin aiki na tanderun narkewar gilashi, spout a bayan yankin narkewa da fakitin da ke kusa da shi, ƙaramin tanderun tanderu da sauran sassa.

Domin ba ya amsa tare da m alkali karfe oxides, ba za a samu wani narkakkar abu fita daga bulo surface ya gurbata gilashin. A cikin tanderun narkewar gilashin iyo, saboda kwatsam kunkuntar mashigar tashar kwararar sashin sanyaya, yana da sauƙi don haifar da tururi na alkaline a nan, don haka tashar ta kwarara a nan an yi ta da bulo β masu juriya. to lalata ta alkaline tururi.

3. Kammalawa

Dangane da kyawawan kaddarorin tubalin corundum da aka haɗe da su dangane da juriya na zaizayar gilashi, juriyar kumfa, da juriya na dutse, musamman ma tsarinsa na musamman na crystal, da kyar yake gurɓata narkakkar gilashin. Akwai mahimman aikace-aikace a cikin bel ɗin bayani, sashin sanyaya, mai gudu, ƙaramin murhu da sauran sassa.