Allura-Kamar Mullite lu'ulu'u waɗanda ke Ba da Babban Narkewa, Ƙarƙashin Ƙarƙashin Ƙarfafawar thermal da Kyakkyawan Juriya ga Shock na thermal don Fused Mullite

Corundum mullite
Babban-tsarki Fused mullite
Electro-fused mullite

Takaitaccen Bayani

Fused Mullite an samar da shi ta hanyar alumina na tsarin Bayer da yashi mai tsabta mai tsabta yayin da yake haɗuwa a cikin babban tanderun wutar lantarki.

Yana da babban abun ciki na lu'ulu'u masu kama da allura waɗanda ke ba da madaidaicin narkewa, ƙarancin haɓakawar thermal mai sauƙi da kyakkyawan juriya ga girgiza thermal, nakasawa ƙarƙashin kaya, da lalata sinadarai a babban zafin jiki.

TUNTUBE YANZU

Fused Mulite 75

Abubuwa		Naúrar	Fihirisa	Na al'ada
Abubuwan sinadaran	Al₂O₃	%	73.00-77.00	73.90
	SiO₂	%	22.00-29.00	24.06
	Fe₂O₃	%	0.4 max (Kashi 0.5% max)	0.19
	K2O+Na₂O	%	0.40 max	0.16
	CaO+MgO	%	0.1% max	0.05
Refractoriness		℃	1850 min
Yawan yawa		g/cm³	2.90 min	3.1
Gilashin lokaci abun ciki		%	10 max
3 Al₂O₃.2 SiO₂Mataki		%	90 min

F-Fused; M-Mulite

Fused Mulite 70

Abubuwa		Naúrar	Fihirisa	Na al'ada
Abubuwan sinadaran	Al₂O₃	%	69.00-73.00	70.33
	SiO₂	%	26.00-32.00	27.45
	Fe₂O₃	%	0.6 max (Labarai 0.7% max)	0.23
	K2O+Na₂O	%	0.50 max	0.28
	CaO+MgO	%	0.2% max	0.09
Refractoriness		℃	1850 min
Yawan yawa		g/cm³	2.90 min	3.08
Gilashin lokaci abun ciki		%	15 max
3 Al₂O₃.2 SiO₂Mataki		%	85 min

Tsarin Samfura

Fused Mullite an samar da shi ta hanyar alumina na tsarin Bayer da yashi mai tsabta mai tsabta yayin da yake haɗuwa a cikin babban tanderun wutar lantarki.

Aikace-aikace

Ana amfani da shi sosai azaman albarkatun ƙasa don manyan abubuwan haɓakawa, kamar bulogin rufi a cikin tanderun murhu na gilashi da tubalin da ake amfani da su a cikin tanderun iska mai zafi a masana'antar ƙarfe.

Hakanan ana amfani dashi a cikin yumbun kiln da masana'antar petrochemical da sauran aikace-aikace masu yawa.

Ana amfani da tarar Mullite Fused a cikin rufin Foundry don juriyar girgizawar zafi da kaddarorin rashin wettability.

Siffofin

• High thermal kwanciyar hankali
• Low reversible thermal fadada
• Juriya ga harin slag a babban yanayin zafi
• Tsayayyen sinadaran sinadaran

Mullite, kowane nau'in ma'adinan da ba kasafai ya ƙunshi aluminum silicate (3Al2O3 · 2SiO2). An kafa shi akan harba albarkatun aluminosilicate kuma shine mafi mahimmancin abubuwan da ke cikin farin yumbu, faranti, da kayan rufewa da zafi mai zafi. Abubuwan da aka tsara, irin su mullite, suna da rabon alumina-silica na aƙalla 3:2 ba zai narke ƙasa da 1,810°C (3,290°F), alhali waɗanda ke da ƙananan rabo sun narke a yanayin zafi ƙasa da 1,545°C (2,813° F).

An gano mullite na halitta azaman fari, lu'ulu'u masu tsayi a tsibirin Mull, Hebrides na ciki, Scot. An gane shi ne kawai a cikin ruɗewar argillaceous (clayey) a cikin duwatsu masu ɓarna, yanayin da ke nuna yanayin zafi sosai na samuwar.

Bayan mahimmancinsa ga tukwane na al'ada, mullite ya zama zaɓi na kayan don ci-gaba da yumbu na aiki saboda kyawawan kaddarorin sa. Wasu fitattun kaddarorin mullite sune ƙananan haɓakar thermal, ƙarancin ƙarancin zafin jiki, kyakkyawan juriya mai raɗaɗi, ƙarfin zafi mai ƙarfi, da kwanciyar hankali mai kyau. Hanyar samuwar mullite ya dogara da hanyar haɗa abubuwan da ke ɗauke da alumina da silica. Har ila yau, yana da alaƙa da yanayin zafi wanda abin da ya faru ya haifar da samuwar mullite (mullitisation zafin jiki). An ba da rahoton cewa yanayin zafi ya bambanta da digirin Celsius ɗari da yawa dangane da hanyar haɗakarwa da aka yi amfani da ita.