High Alumina Refractory Castable

$High Alumina Refractory Castable$

Al2O3% (≥) 50-80

Bulk Density (g/cm³) 2.15-2.65

Cold Crushing Strength (MPa) 25-40

Refractoriness (℃) 1700-1780

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High Alumina Castable

High alumina castable is also known as calcium clinker. It is made of industrial alumina powder and selected limestone powder as raw materials. The alumina conventional castables is produced under rotating high temperatures and ground into a powder.

As we can know from the name of product, alumina castable contains more Al2O3 than other kinds of refractory castable. Therefore, it brings higher refractoriness and many excellent performances. Commonly, delivers these products in a dry form in bags. It has extensive application in industrial applications where high heat, wear and corrosion resistance are required.

Item/Grade		GLJ-50	GLJ-60	GLJ-65	GLJ-70	GLJ-80
(Al2O3) ≥/%		50	60	65	70	80
Refractoriness ≥/℃		1700	1720	1720	1720	1780
Bulk Density ≥/ (g/cm³)	110℃*24h	2.15	2.30	2.40	2.45	2.65
Cold Modulus of Rupture ≥/MPa		4.0	5.0	6.0	6.0	7.0
Cold Crushing Strength ≥/Mpa		25	30	35	35	40
Permanent Linear Change (T/℃*3h)/%		±0.8 (1350℃)	±0.8 (1400℃)			±0.8 (1500℃