Fasalada Laf-dhabarka Magnesium-Aluminium-Nadiifinta Sare: Sma-66, Sma-78 Iyo Sma-90. Taxanaha Alaabta Spinel Sintered

Magnesium aluminate spinel oo la isku qurxiyo
Magnesia spinel clinker
synthesize spinel

Sharaxaad Gaaban

Junsheng-nadiifinta sare ee magnesium-aluminium spinel system waxay isticmaashaa aluminium saafi ah oo saafi ah iyo magnesium oxide saafi ah oo saafi ah sida alaabta ceeriin, waxaana lagu daraa heerkul sare. Sida laga soo xigtay halabuurka kiimikada kala duwan, waxa loo qaybiyaa saddex darajo: SMA-66, SMA-78 iyo SMA-90. Taxanaha Alaabta.

HADDA LA XIRIIR

Astaamaha

• Junsheng-nadiifinta sare ee magnesium-aluminium spinel waxay leedahay sifooyinka soo socda:
• Iska caabin sare oo diidmo ah;
• Dejinta mugga heerkulka sare ee wanaagsan;
• Iska caabin heer sare ah ee daxalka slag alkaline iyo dhexgalka;
• Degganaanshiyo shoog kulayl oo wanaagsan.

ITEM		CUTUB	SALAAMAHA
			SMA-78	SMA-66	SMA-50	SMA90
Halabuurka kiimikada	Al₂O₃	%	74-82	64-69	48-53	88-93
	MgO	%	20-24	30-35	46-50	7-10
	CaO	%	0.45 ugu badnaan	0.50max	0.65max	0.40 max
	Fe₂O₃	%	0.25max	0.3max	0.40 max	0.20 max
	SiO₂	%	0.25max	0.35 ugu badnaan	0.45 ugu badnaan	0.25max
	NaO₂	%	0.35 ugu badnaan	0.20 max	0.25max	0.35 ugu badnaan
Cufnaanta weyn g/cm³			3.3 daq	3.2 daqiiqo	3.2 daqiiqo	3.3 daq
nuugista heerka biyaha%			1 max	1 max	1 max	1 max
Heerka liidata %			3 max	3 max	3 max	3 max

'S' ----isku-duubni; F --ku-daran ; M------magnesia; A----alumina; B----bauxite

Macdanta lafdhabarta ayaa saameyn muhiim ah ku leh sifooyinka heerkulka sare ee walxaha dib-u-celinta. Tusaale ahaan, sababtoo ah isugeynta balaarinta kulaylka yar ee spinel (α = 8.9x10-* / ℃ at 100 ~ 900 ℃), spinel waxaa loo isticmaalaa sida wakiilka xidha (ama loo yaqaan wejiga sibidhka, matrix), leben magnesia-alumina leh periclase sida marxaladda ugu weyn ee crystal, marka heerkulku isbeddelo, cadaadiska gudaha ee soo baxa waa yar yahay, iyo lebennada ma fududa in la jebiyo, sidaas awgeed xasilloonida kuleylka ee lebenka ayaa la wanaajin karaa (lebenka magnesia-alumina Xasiloonida kulaylku waa 50 ~ 150). jeer).

Intaa waxaa dheer, sababtoo ah spinel waxay leedahay sifooyin wanaagsan sida qallafsanaan sare, guryaha kiimikada deggan, iyo dhibic dhalaalaysa sare, oo aad u adkaysta daxalka by dhalaalidda kala duwan ee heerkulka sare, joogitaanka macdanta spinel ee alaabta ayaa hagaajiyay waxqabadka heerkulka sare ee alaabta.

Sababta ugu weyn ee heerkulka jilcin heerkulka sare ee leben magnesia-alumina (bilawga aan ka yarayn 1550-1580 ℃) waa ka sarreeyaa leben magnesia (bar bilawga ka hooseeya 1550 ℃) waa in ka kooban matrix ka duwan yahay. .

Marka la soo koobo, spinels waa qalab aad u fiican marka loo eego barta dhalaalka, ballaarinta kulaylka, qallafsanaanta, iwm., oo leh hanti kiimiko ah oo deggan, caabbinta xooggan ee nabaadguurka slag alkaline, iyo caabbinta nabaad-guurka birta dhalaalaysa. .

Macluumaadka aasaasiga ah

Junsheng-nadiifinta sare ee magnesisia-aluminium spinel waxay leedahay wax aan nadiif ahayn oo aad u hooseeya iyo wax qabad heerkul sare oo aad u fiican. Spinel-nadiifinta sare waxay ku habboon tahay qaybaha hore loo sii diyaariyay sida lebenka neefsiga ah, lebennada fadhiga, xargaha, daboolka foornada korontada ku shaqeysa, agabka dib-u-celinta ee foornada wareegta ah, iyo agabka dib-u-celinta ee alwaaxyada dhalaalaysa. badeecooyinka, iyo sidoo kale qaybo qaabaynta laf dhabarta ka kooban.

Alaabooyinku waxay gacan ka geysan karaan hagaajinta iska caabbinta daxalka ee maaddooyinka refractory, iyo xallinta dhibaatada dildilaaca walxaha ay sababtay ku darista alaabta ceeriin ee magnesium.