Model Number

low cement

Refractory castable is unshaped refractory material that doesn't need firing. Mixed by grain, fines and binder in fixed proportion, refractory castable can replace special shaped refractory material. Refractory castable can be used directly without firing, easy to construct, and has a high utilization rate and high cold crushing strength.

Low Cement Refractory Castable adopts submircon powder technology. Micro powder is used as binder, aluminate cement  as coagulation accelerator, some antidetonant and water reducer will also be added in during the production of Low Cement Refractory Castable. Compared with common Refractory Castable, Low Cement Refractory Castable owns the below characteristics:

1. The dosage of cement is low, the content of calcium only accounts for 1/4-1/3 of common Refractory Castable
2. Water consumption rate during the construction is almost 1/2 or 1/3 of the common Refractory Castable, so the Low Cement Refractory Castable has high density and low porosity.
3. High normal temperature cure property, intensity will be increased after medium temperature and high temperature. Three or five times more than common Refractory Castable.
4. Good volume stability under high temperature.

Application:

Material for metallurgy, petroleum, chemical and other industries’ kilns
Part of refining installation, like ladle cover
Insert for roof of the kiln

Item		Low Cement Refractory Castable						Special
No.		A-45	A-60	A-70	A-75	A-80	A-90	S-1	S-2
Dry Density (g/cm3) ≥		2.3	2.5	2.6	2.65	2.7	3	2.7	2.7
Chemical (%)	Al2O3≥	45	60	70	75	80	90	75	75
	ZrO2	--	--	--	--	--	--	3	3(Cr2O3)
Modulus of Rupture(Mpa)	110℃×24h≥	5	8	9	9	10	12	10	10
	1500℃×3h≥	8(1350℃)	10 (1450℃×3h)			12	15	12	12
Compressive Strength(Mpa)	110℃×24h≥	30	40	40	45	45	60	45	45
	1450℃×3h≥	60	80	80	85	90	85	90	90
Linear Dimensional Change After Fired (1500℃×3h)（%）≤		±0.5	±0.5	±0.5	±0.5	±0.5	±0.5	±0.5	±0.5
		1350℃×3h	1450℃×3h	1450℃×3h	1450℃×3h
Refractoriness(℃)　≥		1710	1740	1790	1790	1790	1790	1790	1790
Working Temp(℃)		1450	1450	1500	1550	1600	1650