Njerwa za Mullite & Njerwa za Sillimanite
Njerwa ya MulliteNdi njerwa yolimba kwambiri yolimba ya alumina yokhala ndi mullite (3Al₂O₃·2SiO₂) ngati gawo lalikulu la kristalo, chinthu chokhacho chokhazikika cha gawo la kristalo lotentha kwambiri mu dongosolo la Al₂O₃-SiO₂. Ili ndi kulimba kwamphamvu kwambiri kwa kutentha kwambiri (yopanda kusintha kwa kutentha kuposa 1600℃ kuti igwiritsidwe ntchito nthawi yayitali, kukwera pang'ono kwambiri), magwiridwe antchito abwino kwambiri a kutentha (kukulitsa kutentha pang'ono, kuletsa kusweka/kuchotsa khungu), kukana dzimbiri kwabwino (kolimbana ndi acidity/neutral slag scouring ndi kusungunuka kwa dzimbiri, pang'onokuipitsidwa kwa mpweya), mphamvu yopondereza kutentha kwa chipinda komanso kuoneka ngati ma porosity pang'ono, yokhala ndi mafotokozedwe athunthu komanso kusintha kosinthika, komwe kumagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana otentha kwambiri, zomwe zimapangitsa kuti ikhale chinthu cholimba chomwe chimakondedwa kwambiri pakupanga ma uvuni osiyanasiyana otentha kwambiri.
Gulu la Zamalonda:
1. Njerwa Yopangidwa ndi Sintered Mullite:Yopangidwa kuchokera ku bauxite ndi silika (1600-1700℃ sintering), Al₂O₃ 65%-72%. Yotsika mtengo, yokhwima, yoyenera kutentha kwapakati komanso kutentha kwambiri; imapezeka mu njerwa zokhazikika/zooneka ngati zapadera, zomwe zimagwiritsidwa ntchito kwambiri mu zipangizo zomangira ndi ma uvuni achitsulo.
2. Njerwa Yosakanikirana ya Mullite:Yolumikizidwa ndi magetsi (kupitirira 1900℃), kristalo wokhuthala, kapangidwe kokhuthala. Al₂O₃ 70%-75%, yolimba kwambiri pakutentha/kudzikundikira kwa dzimbiri, yotsika kwambiri. Yoyenera kutentha kwambiri (kupitirira 1650℃) (magalasi osungunula, zitsulo zapamwamba).
3. Njerwa ya Zircon Mullite:Chowonjezera cha Mullite + zircon (ZrSiO₄) (1650-1720℃ choyipitsa). Al₂O₃ 68%-75%, ZrO₂ 8%-15%, cholimba kwambiri pakukana kukokoloka kwa nthaka. Chimagwiritsidwa ntchito m'zigawo za uvuni wosungunula magalasi ndi m'zipinda zosungunula zopanda chitsulo zomwe zimakokoloka kwambiri.
4. Njerwa ya Mullite Yoyera Kwambiri:Alumina/silika woyeretsedwa kwambiri, Fe₂O₃≤0.2%, Al₂O₃ 72%-78%, wofewa kuposa 1850℃. Wopanda kuipitsa, wokhazikika bwino kwambiri pa kutentha, pazochitika zoyeretsedwa kwambiri (zitsulo zolondola, ma uvuni a ceramic amagetsi).
5. Zigawo Zokonzedweratu za Mullite:Zokonzedwa malinga ndi kukula/mawonekedwe a uvuni, palibe kudula komwe kulipo, ntchito yabwino kwambiri yomanga, kutseka bwino. Zoyenera kugwiritsidwa ntchito m'magawo osakhazikika a uvuni (mastovu otentha, ng'anjo zosweka), kuchepetsa chiopsezo cha kugwa kwa njerwa.
Njerwa ya SillimaniteAmapangidwa kuchokera ku sillimanite yachilengedwe (Al₂SiO₅, Al₂O₃ yokhudzana ndi 62.9%) kudzera mu batching, forming ndi high-temperature sintering. Khalidwe lake lalikulu ndilakuti sillimanite imadutsa mullitization phase transformation pa kutentha kwakukulu (1300-1500℃), limodzi ndi kukula pang'ono kwa voliyumu (2%-3%), zomwe zimatha kuchepetsa kuchepa kwa sintering body ya njerwa, zomwe zimapangitsa kuti thupi la njerwa likhale lolimba komanso lotsekedwa bwino. Refractoribility yake ndi 1770-1830℃, yomwe ndi yoyenera kwambiri pa ntchito zapakati komanso zapamwamba komanso kutentha kwakukulu komanso dzimbiri la mankhwala, komanso mtengo wake ndi wabwino kwambiri.
Gulu la Zamalonda:
1. Njerwa ya Sillimanite Yachizolowezi:Sillimanite yachilengedwe (Al₂O₃ 60%-62%) + bauxite/dongo, yowuma mwachizolowezi. Yokhala ndi ma porosity apakati, kutentha kwabwino, yotsika mtengo; yogwiritsidwa ntchito potentha kwambiri komanso kusinthasintha kwa kutentha kwachizolowezi (pakhosi la ng'anjo yophulika, mipando ya ceramic kiln).
2. Njerwa ya Sillimanite Yoyera Kwambiri:Sillimanite yachilengedwe yoyera kwambiri (Al₂O₃ 62%-65%), Fe₂O₃≤0.3%, 1580-1650℃ yowutsa. Yokhuthala kwambiri, yolimba bwino pa alkali/dzimbiri; yoteteza ku dzimbiri pang'ono kwa mankhwala (ma uvuni agalasi, ng'anjo zosungunulira zopanda ferrous).
3. Njerwa ya Sillimanite-Mullite Composite:Sillimanite + mullite, kusinthasintha kwa gawo lokha + kukhazikika kwa kutentha kwambiri. Al₂O₃ 63%-68%, imasunga kukana kutentha ndi kugwedezeka; pa kutentha kwakukulu, kutentha kwambiri komwe kumanyamula katundu (pansi pa ng'anjo yophulika, njira yoyendera magalasi).
Zinthu zopangidwa ndi njerwa za Sillimanite:Njerwa ya m'mbali, chitoliro choyendera madzi, chitoliro chozungulira, beseni yodyetsera, mphete ya orifice, chokokera chosakaniza, chobowola, silinda yodyetsera madzi, njerwa ya slag yozimitsira moto, chipika chonyowetsa madzi, njerwa ya arch, chivundikiro cha beseni yodyetsera madzi, njerwa yodutsa m'bowo, njerwa yoyatsira moto, mtengo, njerwa yophimba ndi mitundu ina ndi zofunikira.
Ubwino Waukulu:
1. Kusintha kwa Gawo Kudzilimbitsa:Kukulitsa kutentha kwambiri kumathetsa kuchepa kwa chitsulo, kuonetsetsa kuti chikugwirizana bwino komanso kuti chitseke bwino.
2. Kukhazikika kwa Kutentha Koyenera:Kukulitsa kutentha kochepa, kukana kutentha kwambiri komanso kukana kuzizira, koyenera kusintha kutentha pafupipafupi.
3. Kugwiritsa Ntchito Ndalama Mokwera:Zinthu zachilengedwe zopangidwa ndi sillimanite, mtengo wake ndi wotsika poyerekeza ndi njerwa za mullite, zoyenera kugwiritsidwa ntchito pa zinthu zomwe zimawononga ndalama zambiri.
4. Kukana Kwabwino Kwambiri kwa Slag:Yolimba ku dzimbiri la slag/glass liquid komanso kutentha kwambiri, siivuta kuichotsa.
5. Zachilengedwe komanso Zosamalira Chilengedwe:Palibe zodetsa zovulaza, kuipitsidwa pang'ono kwa zinthu, koyenera ku uvuni zosungira zachilengedwe.
| Zogulitsa | ZitatuZochepaMullite | Sintered Mullite | Sillimanite Mullite | YosakanizidwaMullite | ||||
| Mndandanda | RBTM-47 | RBTM-65 | RBTM-70 | RBTM-75 | RBTA-60 | RBTA-65 | RBTFM-75 | |
| Kusakhazikika kwa mpweya (℃) ≥ | 1790 | 1790 | 1790 | 1790 | 1790 | 1790 | 1810 | |
| Kuchuluka Kwambiri (g/cm3) ≥ | 2.42 | 2.45 | 2.50 | 2.60 | 2.48 | 2.5 | 2.70 | |
| Kuoneka ngati Porosity (%) ≤ | 12 | 18 | 18 | 17 | 18 | 18 | 16 | |
| Mphamvu Yopondereza Yozizira (MPa) | 60 | 60 | 70 | 80 | 70 | 70 | 90 | |
| Kusintha Kokhazikika kwa Linear (%) | 1400°×2h | +0.1 -0.1 | | | | | | |
| 1500°×2h | | +0.1 -0.4 | +0.1 -0.4 | +0.1 -0.4 | +1 -0.2 | ± 0.2 | ± 0.1 | |
| Refractoriness Under Load@0.2MPa(℃) ≥ | 1520 | 1580 | 1600 | 1600 | 1600 | 1620 | 1700 | |
| Creep Rate@0.2MPa 1200°×2h(%) ≤ | 0.1 | ― | ― | ― | ― | ― | ― | |
| Al2O3(%) ≥ | 47 | 64 | 68 | 72 | 60 | 65 | 75 | |
| Fe2O3(%) ≤ | 1.2 | 0.8 | 0.8 | 0.7 | 1.0 | 0.8 | 0.5 | |
Njerwa Zambiri:
1. Makampani Opanga Zitsulo: Chophimba chitofu chotentha, shaft ya ng'anjo yophulika, ladle lining, ng'anjo yosungunula zitsulo yopanda chitsulo;
2. Makampani Opanga Zipangizo Zomangira: Malo otentha kwambiri a uvuni wa ceramic, malo osinthira a uvuni wozungulira wa simenti, uvuni wa ngalande wosagwira ntchito;
3. Makampani Opanga Magalasi: Chokonzanso, njira, chotsukira ndi khoma la mbali ya dziwe logwirira ntchito la uvuni wosungunula magalasi;
4. Makampani Opanga Mankhwala: Uvuni wosweka wa Petrochemical, calciner yotentha kwambiri, uvuni wokazinga wothandiza;
5. Malo Ogulitsira Zinthu Zapamwamba: Uvuni wa ceramic wamagetsi, ng'anjo yopangidwa ndi zitsulo (yoyenera mtundu wa kuyera kwambiri).
Njerwa za Sillimanite:
1. Makampani Ogulitsa Zitsulo: Njerwa zoteteza pansi pa ng'anjo yophulika, mkati mwa ng'anjo, malo otulutsira chitsulo, malo otentha apakati ndi otsika;
2. Makampani Opanga Magalasi: Khoma la mbali ya dziwe logwirira ntchito, njira yoyendera madzi, njerwa ya njira ndi njerwa yowunikira yokonzanso ng'anjo yosungunula magalasi;
3. Makampani Opanga Zinthu Zopangira Ceramic: Malo ophikira uvuni wa ceramic, mipando ya uvuni (yosakhazikika, shelufu), mkati mwa uvuni wa ngalande;
4. Makampani Opanga Mankhwala: Chipinda cha ng'anjo chosungunula zitsulo chopanda chitsulo, ng'anjo yokazinga yotentha kwambiri, ng'anjo yokazinga ya sulfuric acid;
5. Magawo Ena: Gawo lotentha kwambiri la chotenthetsera zinyalala, chipinda chotenthetsera zinyalala cha simenti (choyenera mtundu wamba).
Mafunso Ofunsidwa Kawirikawiri
Mukufuna thandizo? Onetsetsani kuti mwapita ku malo athu othandizira kuti mupeze mayankho a mafunso anu!
Ndife opanga enieni, fakitale yathu yakhala ikupanga zinthu zotsutsa kwa zaka zoposa 30. Tikulonjeza kupereka mtengo wabwino kwambiri, ntchito yabwino kwambiri yogulitsa zinthu zisanagulitsidwe komanso zitagulitsidwa.
Pa njira iliyonse yopangira, RBT ili ndi dongosolo lathunthu la QC la kapangidwe ka mankhwala ndi mawonekedwe ake. Ndipo tidzayesa katunduyo, ndipo satifiketi yaubwino idzatumizidwa ndi katunduyo. Ngati muli ndi zofunikira zapadera, tidzayesetsa momwe tingathere kuti zigwirizane nazo.
Kutengera kuchuluka kwa katundu, nthawi yathu yotumizira ndi yosiyana. Koma tikulonjeza kutumiza mwachangu momwe tingathere ndi mtundu wotsimikizika.
Inde, timapereka zitsanzo zaulere.
Inde, ndithudi, mwalandiridwa kupita ku kampani ya RBT ndi zinthu zathu.
Palibe malire, titha kupereka malingaliro abwino kwambiri komanso yankho malinga ndi momwe zinthu zilili.
Takhala tikupanga zinthu zopinga kwa zaka zoposa 30, tili ndi chithandizo champhamvu chaukadaulo komanso chidziwitso chambiri, titha kuthandiza makasitomala kupanga ma uvuni osiyanasiyana ndikupereka chithandizo chimodzi chokha.
