Ca70 Calcium Aluminate Refractory Cement for Refractory Castable High Temperature Resistant

Product Description

Product Description

Low Cement Refractory Castable is a high-performance monolithic refractory material specially developed for steelmaking ladles and converters operating under high temperature, thermal shock, and mechanical stress.

Compared with ordinary refractory castables, this product features low cement content, resulting in higher strength, better thermal stability, and improved resistance to molten steel and slag corrosion.
It is widely used in ladle working lining, ladle safety lining, and converter lining systems in steel plants.

Features

Low Cement Content
Reduced CaO content improves refractoriness, slag resistance, and thermal stability.

High Mechanical Strength
High cold crushing strength ensures excellent resistance to erosion and abrasion during steel tapping and refining.

Excellent Thermal Shock Resistance
Stable performance under frequent heating and cooling cycles in ladle and converter operations.

Good Workability
Suitable for casting and vibration installation, ensuring dense and uniform lining.

Long Service Life
Helps extend lining service life and reduce furnace maintenance frequency.

Applications

Steel ladle working lining
Steel ladle safety lining
Converter lining
Steelmaking furnace monolithic lining systems

Brand Properties		CA-190	CA-185	CA-180	CA-175	CA-170	CA-165	CA-160	CA-155
Application Limit TempºC		1,800	1,800	1,750	1,700	1,700	1,650	1,600	1,550
Bulk Density (g/cm3)		2.90	2.85	2.80	2.60	2.50	2.30	2.15	2.10
Water Required for Casting(%)		9-10	9-10	11-12	11-12	10-13	11-14	12-15	13-16
CCS/MOR (MPa)	110ºCx24h	55(9)	30(6)	30(6)	30(6)	25(5)	25(5)	20(4)	20(4.5)
	1,200ºCx3h	50(8)	35(7)	35(7)	30(7)	20(4)	17(3.5)	15(3.5)	15(2.5)
	1,400ºCx3h	60(10)	50(8)	60(10)	60(10)	50(12)	45(8)	40(7)	40(7)
Permanent Linear Change (%)	110ºCx24h	-0.03	-0.03	-0.06	-0.06	-0.06	-0.06	-0.06	-0.06
	1,200ºCx3h	-0.10	-0.10	-0.15	-0.15	-0.20	-0.20	-0.16	-0.30
	1,400ºCx3h	-0.20	-0.20	-1.0	-1.0	-0.8	-1.0	-1.0	-0.7
(W/m.k)Thermal conductivity	400ºC	0.95	0.95	0.92	0.92	0.80	0.72	0.68	0.68
	1,000ºC	1.1	1.05	1.02	1.02	0.90	0.85	0.88	0.80
(%)Chemical Analysis	Al2O3	92	88	82	75	62	55	50	47
	SiO2	-	-	10	10	29	40	43	45

Q1: How do I choose the right type of refractory castable for my kiln?

A: Selection depends on three key factors: The working temperature, the chemical environment (acidic or alkaline), and the application method (vibrating, pouring, or gunning). Tell our engineers your furnace type, and we will provide a customized material solution within 24 hours.

Q2: What is the recommended shelf life and storage condition?

A: Our castables typically have a shelf life of 6-12 months when stored in a cool, dry place. Since this material is sensitive to moisture, please ensure the bags remain sealed and are kept off the ground on pallets to avoid hydration.

Q3: What is the correct water addition ratio during mixing?

A: For most high alumina castables, the water addition is between 5% and 8% by weight. Note: Excessive water will significantly reduce the density and strength of the lining. We provide a detailed mixing guide with every batch.

Q4: How long is the curing and drying process before the first firing?

A: Generally, curing takes 24 hours at room temperature. The drying process is critical—we recommend a slow heating curve to allow moisture to escape gradually, preventing cracks or explosions. A professional heating schedule will be provided by our technical team.

Q5: Do you provide free samples for quality testing?

A: Yes, we support Free Samples (1-5kg) for your lab testing. You only need to cover the courier cost. This allows you to verify the setting time and chemical composition before placing a bulk order.