Mchenga wa Mullite
Mchenga wa Mullitendi mtundu wa zinthu zotsutsana ndi aluminosilicate zomwe zimagwiritsidwa ntchito kwambiri mumakampani opanga zinthu zopangira maziko.
Kapangidwe Kakang'ono Kakang'ono:
Zigawo zazikulu za mankhwala a mchenga wa mullite ndi Aluminium Oxide (Al₂O₃) ndi Silicon Dioxide (SiO₂). Mitundu ya mankhwala omwe amapezeka nthawi zambiri ndi awa: 42% ≤ Al₂O₃ ≤ 47% ndi 51% ≤ SiO₂ ≤ 53%. Ilinso ndi Iron Oxide (Fe₂O₃), Alkali Metal Oxides (Na₂O+K₂O), ndi zinthu zina zotsalira.
Njira Yopangira:
Mchenga wa mullite nthawi zambiri umapangidwa pogwiritsa ntchito mchere wochuluka mu aluminosilicate, monga kaolin, dongo lolimba, kapena muscovite. Njirayi imaphatikizapo kuphwanya zipangizo zopangira, kuzisakaniza ndi zowonjezera, ndikuzikanikiza kuti zikhale mawonekedwe ake. Mawonekedwe awa amathiridwa mu ng'anjo yotentha kwambiri pa kutentha kwapakati pa 1300°C ndi 1550°C. Pambuyo pa calcination, chinthucho chimaphwanyidwa, kufufuzidwa, kulekanitsidwa kwa maginito kuti achotse chitsulo, ndi njira zina kuti apeze zinthu za mullite mchenga wa tinthu tating'onoting'ono tosiyanasiyana.
Kukula kwa Tinthu:
Mchenga wa mullite umapezeka m'mitundu yosiyanasiyana ya tinthu tating'onoting'ono. Zinthu zathu zazikulu zikuphatikizapo: mauna 8-16, mauna 16-30, mauna 30-60, mauna 60-80, ndi mauna 80-120. Kuphatikiza apo, timapereka mitundu yabwino kwambiri yotchedwa ufa wa mullite, monga mauna 200 ndi mauna 300.
Makhalidwe Ogwira Ntchito:
Kusakhazikika Kwambiri kwa Magazi:Ndi kukana kwa pafupifupi 1750°C, imapirira kutentha kwambiri kwa chitsulo chosungunuka panthawi yopangira, kuteteza chipolopolo cha nkhungu kuti chisawonongeke.
Kukhazikika Kwambiri kwa Kutentha:Mchenga wa mullite umasunga kukhazikika kwa mawonekedwe ake ukasintha kutentha. Umalimbana ndi kutentha kapena kupindika, zomwe zimapangitsa kuti zinthuzo zikhale zolondola.
Katundu Wosavuta Wosuntha:Pambuyo poponya, mchenga wa mullite ukhoza kuchotsedwa mosavuta (kugwedezeka) kuchokera ku castings. Izi zimachepetsa kufunikira kwa ntchito yomaliza pambuyo pake ndikuwonjezera magwiridwe antchito opangira.
Ubwino Wapamwamba Woponya:Kugwiritsa ntchito mchenga wa mullite ngati chipolopolo kumapangitsa kuti pakhale zinthu zoyeretsera zomwe zimakhala zosalala pamwamba pake. Zimachepetsa zolakwika monga mabowo amchenga ndi mabowo opumira, motero zimawonjezera ubwino wa zinthu zoyeretsera.
| Kufotokozera | Gulu la Chakudya Chamadzulo | Giredi 1 | Giredi 2 |
| Al2O3 | 44%-45% | 43%-45% | 43%-50% |
| SiO2 | 50%-53% | 50%-54% | 47%-53% |
| Fe2O3 | ≤1.0% | ≤1.5% | ≤2.1% |
| K2O+Na2O | ≤0.5% | ≤0.6% | ≤0.8% |
| CaO | ≤0.4% | ≤0.5% | ≤0.5% |
| TiO2 | ≤0.3% | ≤0.7% | ≤0.3% |
| Xaustic Soda | ≤0.5% | ≤0.5% | ≤0.7% |
| Kuchuluka Kwambiri | ≥2.5g/cm3 | ≥2.5g/cm3 | ≥2.45g/cm3 |
Chimake cha kupangira molunjika ndi kupanga zipolopolo za nkhungu (njira yopaka sera ndi zigawo zingapo za zinthu zotsutsa kuti apange chipolopolo chakunja. Pambuyo poti sera yasungunuka, pamakhala dzenje lothira chitsulo chosungunuka). Mchenga wa mullite umagwiritsidwa ntchito makamaka ngati chophatikiza chotsutsa mu chipolopolo cha nkhungu ndipo umayikidwa pa zigawo zosiyanasiyana za chipolopolocho, makamaka motere:
1. Chigoba Chapamwamba (Chimazindikira Mwachindunji Ubwino wa Choyikapo)
Ntchito:Gawo la pamwamba pake limakhudzana mwachindunji ndi chopopera ndipo liyenera kuonetsetsa kuti pamwamba pake pali posalala (kupewa kuuma ndi kung'ambika) komanso kupirira kugwedezeka koyamba kwa chitsulo chosungunuka.
2. Chigoba Chakumbuyo (Chimapereka Mphamvu Zonse ndi Mpweya Wokwanira)
Ntchito:Chigoba chakumbuyo ndi kapangidwe ka zigawo zambiri kunja kwa gawo la pamwamba. Chimathandizira mphamvu yonse ya chigoba cha nkhungu (kuletsa kusinthasintha kapena kugwa panthawi yothira) pamene chikutsimikizira kuti mpweya ukuyenda bwino (kutulutsa mpweya m'bowo ndikuletsa ma porosity mu castment).
3. Mapulogalamu Apadera a Ma Casting Ofunidwa Kwambiri
Zopangira alloy zotentha kwambiri:monga masamba a injini ya ndege (kutentha kothira kwa 1500-1600°C), amafuna kuti chipolopolo cha nkhungu chipirire kutentha kwambiri. Kulimba kwa mchenga wa Mullite kungathe kulowa m'malo mwa mchenga wa zircon wokwera mtengo (womwe umasungunuka 2550°C, koma wokwera mtengo), kukwaniritsa zofunikira zotsutsana ndi kutentha kwambiri pomwe kuchepetsa ndalama.
Pa zinthu zoyeretsera zitsulo zosinthika:monga aluminiyamu ndi magnesium alloys (zomwe zimagwira ntchito kwambiri ndipo zimasinthasintha mosavuta ndi SiO₂ mu mchenga wa quartz kuti zipange zinthu zosakanikirana), kukhazikika kwa mankhwala a mullite sand kungachepetse kusakanikirana ndikuletsa "kupangika kwa okosijeni" mu casting.
Pa ma castings akuluakulu olondola:monga nyumba zoyikira magiya a giya la mphepo (zomwe zimatha kulemera matani angapo), chipolopolo cha nkhungu chimafuna mphamvu zambiri zomangira. Gawo lakumbuyo lopangidwa ndi mchenga wa mullite ndi binder ndi lamphamvu kwambiri, zomwe zimachepetsa chiopsezo cha kufalikira ndi kugwa kwa nkhungu.
4. Kuphatikiza ndi Zinthu Zina Zopopera Mpweya
Pakupanga kwenikweni, mchenga wa mullite nthawi zambiri umagwiritsidwa ntchito limodzi ndi zipangizo zina kuti chipolopolo cha nkhungu chigwire bwino ntchito:
Kuphatikiza ndi mchenga wa zircon:Mchenga wa zircon umagwiritsidwa ntchito ngati gawo la pamwamba (kuti utsimikizire kuti pamwamba pake pali pamwamba kwambiri) ndi mchenga wa mullite ngati gawo la kumbuyo (kuti uchepetse ndalama). Izi ndizoyenera kugwiritsa ntchito zinthu zopopera zomwe zimafunika kwambiri pamwamba, monga zida zamlengalenga.
Kuphatikiza ndi mchenga wa quartz:Pa zinthu zoyeretsera zomwe zimafunika kutentha kochepa (monga aloyi wa mkuwa, malo osungunuka 1083℃), zimatha kusintha pang'ono mchenga wa quartz ndikugwiritsa ntchito mchenga wa mullite wochepa kuti zichepetse ming'alu ya zipolopolo.
| Njira Yofotokozera Kupanga Zipolopolo Molondola | ||
| Dothi lonse la pamwamba, ufa wa zirconium | 325 mesh + silica sol | Mchenga: mchenga wa zirconium 120 mesh |
| Kumbuyo kwa slurry | 325 mesh+silika sol+mullite powder 200 mesh | Mchenga: mchenga wa mullite 30-60 mauna |
| Chilimbikitso cha gawo | Ufa wa Mullite 200 mesh + silica sol | Mchenga: mchenga wa mullite 16-30 mesh |
| Kutseka slurry | Ufa wa Mullite 200 mesh + silica sol | _ |
Shandong Robert New Material Co., Ltd.ili ku Zibo City, Shandong Province, China, komwe ndi malo opangira zinthu zopinga. Ndife kampani yamakono yomwe imagwirizanitsa kafukufuku ndi chitukuko, kupanga, kugulitsa, kapangidwe ndi zomangamanga za uvuni, ukadaulo, ndi kutumiza zinthu zopinga. Tili ndi zida zonse, ukadaulo wapamwamba, mphamvu yaukadaulo yamphamvu, khalidwe labwino kwambiri la malonda, komanso mbiri yabwino. Fakitale yathu imakwirira maekala opitilira 200 ndipo kutulutsa kwapachaka kwa zinthu zopinga ndi pafupifupi matani 30000 ndipo zinthu zopinga ndi matani 12000.
Zinthu zathu zazikulu zopangidwa ndi zinthu zotsutsa ndi izi:zipangizo zotsukira za alkaline; zipangizo zotsukira za silikoni ya aluminiyamu; zipangizo zosaoneka ngati zotsukira; zipangizo zotenthetsera kutentha; zipangizo zapadera zotsukira; zipangizo zogwirira ntchito zotsukira za makina opitira patsogolo.
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.
