LC 90 Low Cement Castables, a premium high-alumina monolithic refractory designed for extreme high-temperature industrial applications requiring excellent strength, corrosion resistance, and long service life.

Formulated with high-purity alumina materials, corundum aggregates, high alumina bauxite, and an optimized low-cement bonding system, LC 90 provides outstanding thermal stability and mechanical performance under severe operating conditions.

With an Al₂O₃ content of more than 90% and a controlled CaO content, LC 90 Low Cement Castable offers excellent resistance to molten metal, slag penetration, chemical attack, and high-temperature erosion. Its dense microstructure and optimized particle distribution reduce porosity while improving structural stability during prolonged furnace operation.

Compared with conventional refractory castables, LC 90 uses a low cement formulation to reduce calcium oxide impurities and improve refractoriness. The advanced formulation helps maintain high strength after firing, minimize permanent volume changes, and provide reliable performance in furnace areas exposed to thermal cycling, abrasion, and aggressive chemical environments.

LC 90 Low Cement Refractory Castable is widely used in critical zones of steel, cement, and non-ferrous metal processing equipment where high alumina content and superior durability are required.

Physicochemical Parameters of LC 90 Low Cement Castables

Item	LC 90 Low Cement Castable
Material	High Alumina Bauxite / Corundum
Bulk Density (g/cm³)	≥3.00
Al₂O₃ (%)	≥90
CaO (%)	≤2.0
Flexural Strength (MPa)	≥10 (110°C × 24h)
Flexural Strength (MPa)	≥15 (1500°C × 3h)
Cold Compressive Strength (MPa)	≥100 (110°C × 24h)
Cold Compressive Strength (MPa)	≥120 (1500°C × 3h)
Permanent Linear Change (%)	≤±0.3 (1500°C × 3h)
Refractoriness (℃)	Up to 1790
Safe Service Temperature (℃)	1600-1700

Product Features

High Alumina Content: With Al₂O₃ content of more than 90%, LC 90 provides excellent refractoriness, high-temperature stability, and resistance to chemical corrosion.
Low Cement Formulation: Reduced cement content lowers CaO impurities, improves thermal performance, and enhances resistance to slag and molten material penetration.
Superior Mechanical Strength: High cold crushing strength before and after firing enables reliable operation under mechanical impact, abrasion, and heavy-duty industrial conditions.
Excellent Corrosion Resistance: The dense structure helps resist penetration from molten metal, slag, alkali compounds, and aggressive industrial gases.
Outstanding Thermal Stability: Low permanent linear change ensures dimensional stability during repeated heating and cooling cycles.
High Wear Resistance: Suitable for furnace areas exposed to high-speed airflow, material impact, and abrasive particles.
Long Service Life: Optimized formulation and high-quality raw materials help reduce maintenance frequency and improve furnace operation efficiency.

Applications

LC 90 Low Cement Refractory Castable is designed for high-temperature equipment requiring maximum durability and corrosion resistance, including:

Steelmaking Furnaces: Used for furnace linings, ladle areas, and other high-temperature zones exposed to molten steel, slag, and thermal shock.
Cement Rotary Kilns: Suitable for high-temperature sections requiring excellent abrasion resistance and chemical stability.
Non-Ferrous Metal Furnaces: Provides reliable protection in copper, aluminum, and other metal processing equipment exposed to corrosion and high thermal loads.
Reheating Furnaces: Used in furnace walls, floors, and structural areas requiring high strength and dimensional stability.
Soaking Pits: Provides excellent resistance to thermal cycling and mechanical stress during continuous operation.
Industrial Furnace Linings: Suitable for various high-temperature industrial equipment where high alumina content and long service life are required.

Customization Services

Xintai Refractory provides customized LC 90 Low Cement Castable solutions according to different furnace structures, operating temperatures, and service environments.

Customization options include:

Al₂O₃ Content Adjustment:
Different alumina grades can be supplied according to temperature requirements and chemical conditions.
Aggregate Optimization:
High alumina bauxite, corundum, and other refractory aggregates can be selected for specific applications.
Performance Enhancement:
Formulations can be adjusted to improve abrasion resistance, thermal shock resistance, corrosion resistance, and mechanical strength.
Application-Based Solutions:
Customized castable formulations can be developed according to furnace design, installation methods, working temperature, and service conditions.

Contact Xintai technical team with your equipment details, operating conditions, or required specifications for a suitable LC 90 Low Cement Castable solution.

Packing and Shipping Details

LC 90 Low Cement Refractory Castable is carefully packed to prevent moisture absorption and ensure stable quality during storage and transportation.

Packing:

Standard Packaging: Moisture-resistant bags designed for refractory castable materials.
Palletized Shipment: Bulk orders can be packed on pallets for safer handling and transportation.
Customized Packaging: Packaging methods can be adjusted according to customer requirements.

About Xintai Refractory

Xintai Refractory specializes in manufacturing and supplying refractory materials for steel, cement, glass, ceramics, and other high-temperature industries. With more than 20 years of export experience, Xintai provides refractory bricks, monolithic refractories, castables, and customized refractory solutions for industrial furnace applications.

Our product range includes high alumina bricks, refractory castables, insulating refractories, slide gate plates, purging plugs, and other engineered refractory products. We support customized material grades and technical specifications according to different operating conditions and application requirements.