Makristalo Ofanana ndi Singano Omwe Amapereka Malo Osungunuka Okwera, Kukula Kotsika Kosinthika Kwamatenthedwe Ndi Kukaniza Kwabwino Kwambiri Pakugwedezeka Kwamatenthedwe Kwa Mullite Wosakanikirana

Corundum mullite
Kuyeretsa kwakukulu kosakanikirana ndi mullite
Electro-fused mullite

Kufotokozera Kwachidule

Fused Mullite imapangidwa ndi Bayer process alumina ndi mchenga wa quartz woyeretsedwa kwambiri uku akusakanikirana mung'anjo yayikulu kwambiri yamagetsi yamagetsi.

Ili ndi makhiristo onga singano a mullite omwe amapereka malo osungunuka kwambiri, kuwonjezereka kwamafuta otsika osinthika komanso kukana kugwedezeka kwamafuta, kupindika pansi pa katundu, komanso dzimbiri lamankhwala pa kutentha kwakukulu.

ONANI TSOPANO

Fused Mullite 75

Zinthu		Chigawo	Mlozera	Chitsanzo
Chemical zikuchokera	Al₂O₃	%	73.00-77.00	73.90
	SiO₂	%	22.00-29.00	24.06
	Fe₂O₃	%	0.4 max(Chindapusa 0.5%max)	0.19
	K2O+Na₂O	%	0.40 max	0.16
	CaO+MgO	%	0.1% kuchuluka	0.05
Refractoriness		℃	1850 min
Kuchulukana kwakukulu		g/cm³	2.90 min	3.1
Galasi gawo zili		%	10 max
3 Al₂O₃.2SiO₂Gawo		%	90 min

F-Wosakanikirana; M-Mulite

Fused Mullite 70

Zinthu		Chigawo	Mlozera	Chitsanzo
Chemical zikuchokera	Al₂O₃	%	69.00-73.00	70.33
	SiO₂	%	26.00-32.00	27.45
	Fe₂O₃	%	0.6 max(Chindapusa 0.7%max)	0.23
	K2O+Na₂O	%	0.50 max	0.28
	CaO+MgO	%	0.2% kuchuluka	0.09
Refractoriness		℃	1850 min
Kuchulukana kwakukulu		g/cm³	2.90 min	3.08
Galasi gawo zili		%	15 max
3 Al₂O₃.2SiO₂Gawo		%	85 min

Njira Yopanga

Fused Mullite imapangidwa ndi Bayer process alumina ndi mchenga wa quartz woyeretsedwa kwambiri uku akusakanikirana mung'anjo yayikulu kwambiri yamagetsi yamagetsi.

Kugwiritsa ntchito

Amagwiritsidwa ntchito kwambiri ngati zida zopangira ma refractories apamwamba kwambiri, monga njerwa zomangira mung'anjo yamagalasi ndi njerwa zomwe zimagwiritsidwa ntchito mung'anjo yamphepo yotentha m'makampani azitsulo.

Amagwiritsidwanso ntchito mu uvuni wa Ceramic ndi petrochemical ndi ntchito zina zambiri.

Chilango cha Fused Mullite chimagwiritsidwa ntchito mu zokutira za Foundry chifukwa chokana kutenthedwa kwa kutentha komanso kusanyowa.

Mawonekedwe

• Kukhazikika kwapamwamba kwa kutentha
• Kuwonjezeredwa kochepa kosinthika kwamafuta
• Kukana kuukira kwa slag pa kutentha kwakukulu
• Kukhazikika kwa mankhwala

Mullite, mtundu uliwonse wa mchere wosowa wopangidwa ndi aluminium silicate (3Al2O3 · 2SiO2). Amapangidwa powotcha zida zopangira aluminosilicate ndipo ndiye chinthu chofunikira kwambiri pamiyala yoyera ya ceramic, ma porcelains, ndi zida zotentha kwambiri komanso zowumitsa. Zopangidwa, monga mullite, zokhala ndi chiŵerengero cha alumina-silica cha osachepera 3: 2 sichidzasungunuka pansi pa 1,810 ° C (3,290 ° F), pamene omwe ali ndi chiŵerengero chochepa amasungunuka pang'ono pa kutentha kwa 1,545 ° C (2,813 ° F). F).

Natural mullite inapezedwa ngati makhiristo oyera, otalikirana pa Island of Mull, Inner Hebrides, Scot. Zakhala zikudziwika m'malo osakanikirana a argillaceous (clayey) m'miyala yolowera mkati, zomwe zimasonyeza kutentha kwambiri kwa mapangidwe.

Kupatula kufunika kwake pazadothi wamba, mullite yakhala chisankho chazinthu zopangira zida zapamwamba komanso zogwira ntchito chifukwa cha zabwino zake. Zina mwazinthu zodziwika bwino za mullite ndikukula kwamafuta ochepa, kutsika kwamafuta, kukana kwamphamvu kwambiri, kulimba kwa kutentha kwambiri, komanso kukhazikika kwamankhwala. Njira yopangira mullite imatengera njira yophatikizira ma alumina- ndi silika okhala ndi reactants. Zimagwirizananso ndi kutentha komwe kumapangitsa kuti pakhale mullite (mullitisation kutentha). Kutentha kwa mullitisation kwanenedwa kuti kumasiyana mpaka mazana angapo madigiri Celsius kutengera njira yophatikizira yomwe imagwiritsidwa ntchito.