Brand name Item		Mg-Al cast	High-aluming spinel material	Corundum spinel material
		XLMJ-1	XLJJ-1	XGJJ-2
Chemical composition	Al2O3	70	70	90
	MgO	10-12	14-16	5-6
Bulk density ≥g/cm3	110℃*24h	2.65	2.7	2.95
	1500℃*3h	2.60	2.65	2.85
Cold crushing strength ≥MPa	110℃*24h	30	30	38
	1450℃*3h	35	40	60
High temperature modulus of rupture ≥MPa	110℃*24h	4	5	8
	1450℃*3h	5	10	12
Liner change after fire %	110℃*24h	-0.1	-0.1	-0.1
	1450℃*3h	+1.0	+0.5	+0.5
Refractoriness > ℃		1770	1770	1790
Construction mixture additional water quantity %		9-10	7-8	4-5

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