Amfani da Bulo na Corundum da aka Haɗa a cikin Tanderu Mai Narkewa na Gilashin Float

Tubalan corundum da aka haɗaAna narkar da alumina a cikin tanderun lantarki kuma a jefa ta cikin wani takamaiman tsari na takamaiman siffa, a rufe ta a kuma adana ta a zafi, sannan a sarrafa ta don samun samfurin da ake so. Tsarin samarwa gabaɗaya shine amfani da alumina mai tsafta mai ƙarfi (sama da 95%) da ƙaramin adadin ƙari, a saka sinadaran a cikin tanderun lantarki, sannan a jefa su cikin ƙirar da aka riga aka tsara bayan an narke a zafin jiki sama da 2300 ° C, sannan a ajiye su a ɗumi. Bayan an narkar da shi, ana fitar da shi, kuma abin da aka cire ya zama samfurin da aka gama wanda ya cika buƙatun bayan an yi aiki da sanyi daidai, kafin a haɗa shi da dubawa.

An raba tubalan corundum masu haɗe zuwa nau'i uku bisa ga nau'ikan lu'ulu'u daban-daban da adadin alumina: na farko shine α-Al2O3 a matsayin babban matakin lu'ulu'u, wanda ake kira tubalan α-corundum; na biyu shine α-Al2. Matakan lu'ulu'u na O3 da β-Al2O3 galibi suna cikin abun ciki iri ɗaya, wanda ake kira tubalan αβ corundum; nau'i na uku galibi shine matakan lu'ulu'u na β-Al2O3, wanda ake kira tubalan β corundum. Tubalan corundum masu haɗe da aka saba amfani da su a cikin tanderun narkewa na gilashin iyo sune nau'i na biyu da na uku, wato tubalan αβ corundum masu haɗe da tubalan β corundum. Wannan labarin zai mayar da hankali kan halayen zahiri da sinadarai na tubalan αβ corundum masu haɗe da tubalan β corundum da aikace-aikacen su a cikin tanderun narkewa na gilashin iyo.

1. Binciken aiki na tubalan corundum da aka haɗa

1. 1 Bulo mai haɗin αβ corundum

Tubalan corundum masu hadewa sun kunshi kusan kashi 50% na α-Al2O3 da β-Al2O3, kuma lu'ulu'u biyu an hade su don samar da tsari mai kauri, wanda ke da kyakkyawan juriya ga tsatsa ta alkali. Juriyar tsatsa a zafin jiki mai yawa (sama da 1350°C) ta ɗan fi muni fiye da na tubalan AZS masu hadewa, amma a yanayin zafi kasa da 1350°C, juriyar tsatsa ga gilashin da aka narke yayi daidai da na tubalan AZS masu hadewa. Domin bai ƙunshi Fe2O3, TiO2 da sauran ƙazanta ba, matakin gilashin matrix yana da ƙanƙanta sosai, kuma baƙon abu kamar kumfa ba zai iya faruwa ba lokacin da ya taɓa gilashin da aka narke, don haka gilashin matrix ba zai gurɓata ba.

Bulogin corundum mai hade da αβ suna da yawa a cikin lu'ulu'u kuma suna da kyakkyawan juriya ga tsatsa ga gilashin da aka narke a ƙasa da 1350°C, don haka ana amfani da su sosai a cikin wurin aiki da kuma bayan murhunan gilashi, yawanci a cikin masu wanki, tubalin lebe, tubalin ƙofa, da sauransu. Tubalin corundum da aka haɗa a duniya shine mafi kyawun yin shi ta Toshiba ta Japan.

1.2 Bulo mai haɗin β corundum

Bulo mai hade da β-corundum ya ƙunshi kusan kashi 100% na β-Al2O3, kuma yana da babban tsarin lu'ulu'u mai kama da β-Al2O3. Ya fi girma kuma ba shi da ƙarfi. Amma a gefe guda kuma, yana da kyakkyawan juriya ga fashewa, musamman yana nuna juriya mai ƙarfi ga tururin alkali mai ƙarfi, don haka ana amfani da shi a cikin babban tsarin murhun gilashi. Duk da haka, idan aka dumama shi a cikin yanayi mai ƙarancin abun ciki na alkali, zai yi aiki tare da SiO2, kuma β-Al2O3 zai ruɓe cikin sauƙi kuma ya haifar da raguwar girma don haifar da tsagewa da tsagewa, don haka ana amfani da shi a wurare masu nisa daga watsar da kayan da aka yi da gilashi.

1.3 Halayen zahiri da sinadarai na tubalan αβ da β corundum da aka haɗa

Sinadarin sinadarai na tubalin α-β da β corundum da aka haɗa galibi Al 2O3 ne, bambancin ya fi yawa ne a cikin tsarin lokaci na lu'ulu'u, kuma bambancin tsarin ƙananan halittu yana haifar da bambanci a cikin halayen jiki da na sinadarai kamar yawan yawa, ƙimar faɗaɗa zafi, da ƙarfin matsi.

2. Amfani da tubalin corundum da aka haɗa a cikin tanderun narke gilashi

Kasan da bangon wurin wanka suna hulɗa kai tsaye da ruwan gilashin. Ga dukkan sassan da suka taɓa ruwan gilashin kai tsaye, mafi mahimmancin sifar kayan da ke hana tsatsa ita ce juriyar tsatsa, wato, babu wani abu da ke faruwa tsakanin kayan da ke hana tsatsa da ruwan gilashin.

A cikin 'yan shekarun nan, lokacin da ake tantance alamun ingancin kayan da suka yi kama da na roba a cikin hulɗa kai tsaye da gilashin da aka narke, ban da abubuwan da suka shafi sinadarai, alamun zahiri da na sinadarai, da kuma abubuwan da suka shafi ma'adinai, dole ne a tantance waɗannan alamomi guda uku: ma'aunin juriya ga zaizayar gilashi, ma'aunin kumfa da aka yi da kuma ma'aunin kristal da aka yi da roba.

Tare da buƙatar ingancin gilashi mafi girma da kuma ƙarfin samar da wutar lantarki mafi girma, amfani da tubalan lantarki masu haɗewa zai fi faɗi. Tubalan da aka haɗa da aka saba amfani da su a cikin tanderun narkewar gilashi sune tubalan da aka haɗa da jerin AZS (Al 2O 3 -ZrO 2 -SiO 2). Lokacin da zafin tubalin AZS ya wuce 1350℃, juriyarsa ga tsatsa shine sau 2 ~ 5 na tubalin α β -Al 2O 3. Tubalan αβ corundum da aka haɗa sun ƙunshi ƙananan ƙwayoyin α-alumina (53%) da β-alumina (45%), waɗanda ke ɗauke da ƙaramin adadin gilashin lokaci (kimanin 2%), suna cike ramuka tsakanin lu'ulu'u, tare da tsarki mai yawa, kuma ana iya amfani da su azaman ɓangaren sanyaya tubalin bango na tafkin da ɓangaren sanyaya ɓangaren ƙasa na shimfidar ƙasa Tubalan da tubalan ɗinka da sauransu.

Tsarin ma'adinai na tubalin corundum mai haɗe da αβ yana ɗauke da ƙaramin adadin gilashin, wanda ba zai zubewa ya gurɓata ruwan gilashin ba yayin amfani, kuma yana da kyakkyawan juriya ga tsatsa da kuma juriyar lalacewa mai zafi a ƙasa da 1350 ° C. Shi ne ɓangaren sanyaya na tanderun narkewar gilashin. Abu ne mai kyau don hana ganuwar tanki, ƙasan tanki da kuma masu wanke tanderun narkewar gilashin. A cikin aikin injiniyan tanderun narkewar gilashin, ana amfani da tubalin αβ corundum mai haɗe a matsayin tubalin bango na wurin sanyaya na tanderun narkewar gilashin. Bugu da ƙari, ana amfani da tubalin αβ corundum mai haɗe don tubalin shimfida da kuma tubalin rufewa a cikin sashin sanyaya.

Bulo mai hade da β corundum wani farin samfuri ne wanda ya ƙunshi lu'ulu'u masu kauri na β-Al2O3, wanda ke ɗauke da kashi 92% ~95% Al2O3, ƙasa da kashi 1% na gilashin, kuma ƙarfin tsarinsa yana da rauni kaɗan saboda layin lu'ulu'u mai laushi. Ƙasa, bayyanar porosity bai wuce kashi 15% ba. Tunda Al2O3 kanta tana cike da sodium sama da 2000°C, tana da ƙarfi sosai akan tururin alkali a yanayin zafi mai yawa, kuma kwanciyar hankali na zafinta ma yana da kyau. Duk da haka, lokacin da ya haɗu da SiO2, Na2O da ke cikin β-Al2O3 yana ruɓewa kuma yana amsawa da SiO2, kuma β-Al2O3 yana canzawa cikin sauƙi zuwa α-Al2O3, wanda ke haifar da raguwar girma, yana haifar da tsagewa da lalacewa. Saboda haka, ya dace ne kawai ga manyan gine-gine daga ƙurar SiO2 mai tashi, kamar babban wurin aiki na tanderun gilashi mai narkewa, bututun da ke bayan yankin narkewa da kuma shingen da ke kusa, ƙaramin matakin tanderun da sauran sassan.

Domin ba ya amsawa da iskar gas mai ƙarfi ta alkali, ba za a sami wani abu mai narkewa da ke fitowa daga saman bulo don gurɓata gilashin ba. A cikin tanderun narkewar gilashin da ke iyo, saboda raguwar hanyar kwararar ruwa ta ɓangaren sanyaya kwatsam, yana da sauƙi a haifar da danshi na tururin alkaline a nan, don haka hanyar kwararar ruwa a nan an yi ta ne da tubalan β da aka haɗa waɗanda ke jure wa tsatsa ta tururin alkaline.

3. Kammalawa

Dangane da kyawawan halayen tubalan corundum da aka haɗa dangane da juriyar zaizayar gilashi, juriyar kumfa, da juriyar dutse, musamman tsarin kristal ɗinsa na musamman, ba ya gurɓata gilashin da aka narke. Akwai muhimman aikace-aikace a cikin bel ɗin haske, sashin sanyaya, mai gudu, ƙaramin tanda da sauran sassa.