ultra low cement castable

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Ultra-low cement refractory castable is developed on the basis of low-cement refractory castables. The amount of aluminate cement is generally 2.5% ~ 5%, the performance is better than low cement refractory castable. Ultra-low cement refractory castable varieties are more widely used.

Ultra-low cement refractory castable preparation principles and strength characteristics, and low cement refractory castable is basically the same, its strength slightly higher.

Ultra-low cement refractory castable composition: refractory aggregate, refractory powder, the amount of ultra-fine powder, amount or a small amount of calcium aluminate cement and trace dispersant.

Products		Ultra low cement castable
Material		Clay	High alumina	Corundum
Bulk density（g/cm3）	110℃×16h≥	2.35	2.70	3.20
	1500℃(1350℃)×3h≥	2.30	2.65	3.15
Chemical composition（%）	AL2O3 ≥	45	75	95
	CaO ≤	1.15	1.15	1.15
Flexible strength（MPa）	110℃×16h≥	6	6	8
	1500℃(1350℃)×3h≥	8	8	10
C.C.S（MPa）	110℃×16h≥	40	40	60
	1500℃(1350℃)×3h≥	70	800	90
L.C.（%）	110℃×16h≤	-0.1	0	0
	1500℃(1350℃)×3h≤	±0.5	±0.5	±0.5
Refractoriness（℃）≥		1710	1790	1790
Service temperature（℃）		1400	1450	1650