Refractory Cement

Your Professional Refractory Cement Supplier

Our goal is to become your true partner in the field of alumina insulation brick in China. Kerui refractory is the concentration of refractory industry in China. Kerui is deeply rooted in the high-temperature kiln industry, building its own R&D centre. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

Why Choose Us

Product application: Our main products include more than 200 varieties of organic pressed refractories, unshaped refractories, bricks for carbon roasting furnaces, functional refractories, etc. The products are used in high-temperature kilns and equipment in metallurgy, chemical industry, building materials, electricity, non-ferrous metals, carbon industry and other industries.

Product market: Our refractory products have been sold to Russia, South Korea, Ukraine, Brazil, Indonesia, Iran, Thailand and other countries.

Our production capacity: Our annual production capacity of shaped refractory products is 150,000 tons, and the capacity of unshaped refractory products is 100,000 tons.

Our services: In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.

Advantages of Refractory Cement

$Furnace Refractory Cement$

High-temperature resistance: Refractory cement can withstand extreme temperatures, ranging from 1,000°c to 1,500°c or more, depending on its composition.It maintains structural integrity and strength even under prolonged exposure to intense heat.

Thermal shock resistance: Refractory cement is designed to handle sudden temperature changes without cracking or degrading. This makes it ideal for applications like furnaces and kilns, where rapid heating and cooling occur.

Corrosion resistance: It offers excellent resistance to chemical attacks from acids, alkalis, and other corrosive substances. This property is particularly valuable in industries such as petrochemical and steel manufacturing.

High mechanical strength: Refractory cement provides superior compressive strength and durability, ensuring it can bear heavy loads under high-heat conditions.

Low porosity and density: Its dense structure minimizes porosity, reducing the penetration of gases and molten substances. This enhances its durability and resistance to wear and tear.

Rapid setting and hardening: Refractory cement sets and hardens quickly compared to ordinary portland cement (opc), making it ideal for time-sensitive projects.

Refractory Cement Specification

Products	CA75	CA75	CA80	CA80
Workable time	Moderate	Moderate	Short	Short
Standard	Usual range	Specification limit	Usual range	Specification limit
SiO2, %	0.1-0.4	≤0.5	0.1-0.4	≤0.5
Al2O3, %	73.5-75.5	≥73	78.0-80.0	≥77
Fe2O3, %	0.1-0.4	≤0.5	0.1-0.4	≤0.5
CaO, %	21.0-23.0	-	18.5-20.5	-
R2O, %	-	≤0.4	-	≤0.4
S-, %	-	≤0.1	-	≤0.1
CI-, %	-	≤0.06	-	≤0.06
D50(μm)	6-9	≤10	5-8	≤9
325M(%)	-	≤5.0	-	≤5.0
Specific surface areas(㎡/kg)	420-480	≥400	450-500	≥450
Setting time, min
Initial setting time IS	150-200	≥150	150-210	≥30
Final setting time FS	240-300	≤360	210-270	≤300
Flexural strength, Mpa
1d	6.5-8.5	≥4.0	6.0-8.0	≥4.0
3d	8.5-10.5	≥5.0	7.0-9.0	≥5.0
Compressive strength, Mpa
1d	42-52	≥25	40-50	≥25
3d	52-62	≥30	50-60	≥30

Additional Information of Refractory Cement

Principal phase	CA, CA2, Aα
Secondary phase	C12A7
Pyrometric cone equivalent	1750-1800℃
Bulk density	800-900 kg/m3
Specific gravity	3.1-3.2 g/cm3
Shelf Life	6 months

Composition of Refractory Cement

Refractory cement is made from a combination of materials like calcined alumina, ganister/silicon carbide, zirconia, ceramic clay, and lime among other materials.

It is typically made from a mixture of refractory aggregates, bonding agents, and other materials that are designed to withstand high temperatures. The specific composition of refractory cement can vary depending on the intended use of the product,

These materials are chosen for their ability to withstand high temperatures and their low thermal expansion coefficients, which helps to prevent cracking or other damage to the cement. Refractory cement is often used in the construction of furnaces, kilns, and other high-temperature equipment, as well as in the manufacture of firebricks and other refractory products.

Features of Refractory Cement

High fire resistance

Refractory cement has a fire resistance of over 1750℃ and can effectively resist corrosion at high temperatures.

Good chemical corrosion resistance

Refractory cement has good tolerance to a variety of chemical substances. In the face of 10% sulfuric acid solution, the mass loss rate after immersion for 30 days is less than 5%, which can effectively resist acidic corrosion and has good resistance to alkaline substances.

$70% High Alumina Refractory Cement$

Types of Refractory Cement

High-alumina refractory cement

Contains a high percentage of alumina (al₂o₃), typically between 50% to 80%.

Calcium aluminate cement (cac)

Made from limestone and bauxite, producing calcium aluminate as the primary binder.Temperature resistance: Up to 1,400°c.

Silica-based refractory cement

Contains silica (sio₂) as the primary component.Temperature resistance: Up to 1,650°c.

Fire clay refractory cement

Made from natural fire clay, consisting of alumina and silica.Temperature resistance: Up to 1,500°c.

Low-cement refractory castable

Contains a very low amount of cement (less than 10%) and high refractory aggregates. Temperature resistance: Up to 1,800°c.

Insulating refractory cement

Lightweight cement with a high percentage of insulating materials like vermiculite or perlite. Temperature resistance: Up to 1,200°c.

Application of Refractory Cement

Lining furnaces and kilns: Refractory cement is often used to line the inside walls of furnaces and kilns, where it helps to insulate the equipment and protect it from the high temperatures involved in the manufacturing process.

Fireplace and wood stove construction: Refractory cement is used in the construction of fireboxes and wood stoves, where it helps to protect the structure from the high temperatures generated by the fire.

Pizza ovens: Wood fire pizza ovens typically include castable refractory cement in their construction.

Boiler construction: Refractory cement is sometimes used in the construction of boilers, where it helps to insulate the equipment and protect it from the high temperatures and pressures involved in steam generation.

Furnaces for industrial manufacturing

Refractory cement is used in the construction of furnaces, where it helps to insulate the equipment and protect it from the high temperatures involved.

Crematoriums

The extreme temperatures required for the incineration of remains require refractory castables to help insulate and maintain hot operating temps.

Other high-temperature applications

Refractory cement is also used in a variety of other high-temperature applications, such as in the manufacturing of ceramics, in the petrochemical industry, and in the production of iron and steel

Packing and Shipping of Refractory Cement

Packing	In wooden pallets or crates
Shipping	Shipped by road, sea, rail

FAQ

Q: What is a refractory cement?

A: Refractory Cement is an ideal high-heat cement for masonry joints 1/4" or less (minimum 1/16"). Pre-mixed, easy to trowel, and fiber reinforced, this cement can be used to set, bond, and repair cracked or broken firebricks in stoves, fireplaces, and furnaces as well as for building fireplace boxes.

Q: What is the difference between refractory cement and normal cement?

A: While regular cement may expand well in conjunction with other rigid equipment, it often fails upon contraction due to the deterioration of clinker or binding material. Refractory cement uses binding materials with improved thermodynamic properties to reduce the risk of mechanical failure.

Q: Is it safe to cook on refractory cement?

A: The oven will withstand the heat just fine, if kept hot forever, but on each heat cycle it expands and contracts again. That strain is what the refractory materials are for. It will survive quite a while but you will have to be wary of the inside layer of cement/concrete/brick flaking off onto the food.

Q: Is refractory cement the same as fire cement?

A: Refractory cement is commonly combined with other products like firebrick and other ceramics to further increase thermal resistance. Keep reading to understand just how refractory cement also known as castable refractory or fire cement is used and how it differs from other similar products.

Q: How long does refractory cement last?

A: Depending on the composition of the material, most refractory materials have a shelf life ranging from six to twelve months. The shelf life is due to most monolithic materials containing cement.

Q: Does refractory cement contain asbestos?

A: Because refractory products are designed to withstand high temperatures, they were long made with asbestos.

Q: How long does fire cement take to cure?

A: The general curing time for the fire cement is around 12 hours

As one of the leading refractory cement manufacturers and suppliers in China, we warmly welcome you to buy cheap refractory cement for sale here from our factory. All our products are with high quality and competitive price. refractory cement 50 lbs, high alumina refractory cement