Corundum-mullite high-strength wear-resistant refractory castable
Application Industry: Refractories for Power and Petrochemical Industry
Application Equipment: CFB Boiler Anti-Wear Lining
Size: Custom corundum-mullite high-strength wear-resistant refractory castable geometry per CFB boiler design (free engineering on request)
Products Overview
Our Corundum-mullite high-strength wear-resistant refractory castable is a high-performance refractory castable product engineered for CFB boiler anti-wear lining service in power and petrochemical industry. This product has high thermal strength, strong wear resistance, excellent corrosion resistance and high temperature volume stability, effectively extending the service life of CFB boilers. The refractory castable can be used for the wear lining of various CFB boilers, with stable quality and good engineering performance.
The Corundum-mullite high-strength wear-resistant refractory castable product family is offered in four engineering-proven MJZ chemistry grades. The CH-MJZ70 grade features Al2O3 content minimum 70% and SiO2 content maximum 26% for general CFB boiler anti-wear lining service, with Bulk Density minimum 2.7 g/cm3 after 110 °C drying for 24 hours, Modulus of Rupture minimum 8.5 MPa after 110 °C drying for 24 hours, minimum 11.5 MPa after 1100 °C firing for 3 hours, and minimum 13.0 MPa after 1400 °C firing for 3 hours, Cold Crushing Strength minimum 60 MPa after 110 °C drying for 24 hours, minimum 90 MPa after 1100 °C firing for 3 hours, and minimum 90 MPa after 1400 °C firing for 3 hours, Normal Wear maximum 7.5 cm3, Refractoriness Under Load minimum 1450 °C at 0.2 MPa, Thermal Shock Resistance minimum 25 cycles at 900 °C water cooling, Permanent Linear Change maximum 0.3 percent after 1400 °C firing for 3 hours, and Maximum Service Temperature 1600 °C. The CH-MJZ75 grade features Al2O3 content minimum 75% and SiO2 content maximum 21% for higher-demand CFB boiler anti-wear lining service, with Bulk Density minimum 2.8 g/cm3, Modulus of Rupture minimum 9.3-13.5 MPa depending on curing/firing condition, Cold Crushing Strength minimum 65-100 MPa depending on curing/firing condition, Normal Wear maximum 7 cm3, Refractoriness Under Load minimum 1490 °C, Thermal Shock Resistance minimum 20 cycles, Permanent Linear Change maximum 0.3 percent, and Maximum Service Temperature 1550 °C. The CH-MJZ80 grade features Al2O3 content minimum 80% and SiO2 content maximum 16% for high-demand CFB boiler anti-wear lining service, with Bulk Density minimum 2.85 g/cm3, Modulus of Rupture minimum 10.0-15.0 MPa depending on curing/firing condition, Cold Crushing Strength minimum 70-105 MPa depending on curing/firing condition, Normal Wear maximum 6 cm3, Refractoriness Under Load minimum 1530 °C, Thermal Shock Resistance minimum 25 cycles, Permanent Linear Change maximum 0.2 percent, and Maximum Service Temperature 1550 °C. The CH-MJZ85 grade features Al2O3 content minimum 85% and SiO2 content maximum 11% for highest-demand CFB boiler anti-wear lining service, with Bulk Density minimum 2.9 g/cm3, Modulus of Rupture minimum 11.5-16.0 MPa depending on curing/firing condition, Cold Crushing Strength minimum 75-110 MPa depending on curing/firing condition, Normal Wear maximum 5 cm3, Refractoriness Under Load minimum 1560 °C, Thermal Shock Resistance minimum 20 cycles, Permanent Linear Change maximum 0.2 percent, and Maximum Service Temperature 1600 °C.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Corundum-mullite high-strength wear-resistant refractory castable grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Refractories for Power and Petrochemical Industry category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured from high-purity corundum and mullite as main raw materials with special binder system for high thermal strength and good wear resistance
- Engineering-proven high thermal strength, strong wear resistance, excellent corrosion resistance, and high temperature volume stability for CFB boiler service
- Four MJZ chemistry grades covering Al2O3 content 70-85% for matching different power and petrochemical industry service requirements
- Bulk Density minimum 2.7 to 2.9 g/cm3 with Refractoriness Under Load minimum 1450-1560 °C depending on grade for high temperature service
- Maximum Service Temperature 1550 to 1600 °C and Cold Crushing Strength minimum 60 to 110 MPa depending on grade and curing/firing condition for CFB boiler service
Product Specification
Corundum mullite high-strength wear-resistant refractory castable
This product has high thermal strength, strong wear resistance, excellent corrosion resistance and high temperature volume stability, effectively extending the service life of CFG boilers. Can be used for the wear lining of various CFB boilers.
| Brands / Items | Index | ||||
|---|---|---|---|---|---|
| CH-MJZ70 | CH-MJZ75 | CH-MJZ80 | CH-MJZ85 | ||
| Al2O3 (%) ≥ | 70 | 75 | 80 | 85 | |
| SiO2 (%) ≤ | 26 | 21 | 16 | 11 | |
| Bulk density BD 110°C × 24h (g/cm³) ≥ | 2.7 | 2.8 | 2.85 | 2.9 | |
| Flexural strength MOR (MPa) ≥ | 110°C × 24h | 8.5 | 9.3 | 10.0 | 11.5 |
| 1100°C × 3h | 11.5 | 12.5 | 13.5 | 15.0 | |
| 1400°C × 3h | 13.0 | 13.5 | 15.0 | 16.0 | |
| Compressive strength CCS (MPa) ≥ | 110°C × 24h | 60 | 65 | 70 | 75 |
| 1100°C × 3h | 90 | 95 | 100 | 105 | |
| 1400°C × 3h | 90 | 100 | 105 | 110 | |
| Normal wear (cm³) ≤ | 7.5 | 7 | 6 | 5 | |
| 0.2MPa load softening start temperature RUL (°C) ≥ | 1450 | 1490 | 1530 | 1560 | |
| Thermal shock stability TSR (900°C, Water cooling) (cycle) ≥ | 25 | 20 | 25 | 20 | |
| Line rate of change PLC (%) ≤ | -0.3 | -0.3 | -0.2 | -0.2 | |
| Maximum Service temperature (°C) | 1600 | 1550 | 1550 | 1600 | |
Note: Fourteen performance parameters specified per source image: Al2O3, SiO2, Bulk density, Flexural strength, Compressive strength, Normal wear, RUL, Thermal shock stability, Line rate of change, and Maximum Service temperature. Four CH-MJZ chemistry grades engineered for CFB boiler wear lining service. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
Corundum-mullite high-strength wear-resistant refractory castable is a high-performance refractory castable product engineered for CFB boiler anti-wear lining service in power and petrochemical industry. This product has high thermal strength, strong wear resistance, excellent corrosion resistance and high temperature volume stability, effectively extending the service life of CFB boilers. The refractory castable can be used for the wear lining of various CFB boilers, with stable quality and good engineering performance.
Application Industry: Refractories for Power and Petrochemical Industry.
Target Equipment: CFB Boiler Anti-Wear Lining of small, medium-size, and large power and petrochemical industrial operations.
Specific Application Zones: The CH-MJZ70 grade (Al2O3 content minimum 70%) is the standard variant for general CFB boiler anti-wear lining service, with Maximum Service Temperature 1600 °C and Cold Crushing Strength minimum 60 to 90 MPa depending on curing/firing condition. The CH-MJZ75 grade (Al2O3 content minimum 75%) is the higher-demand variant, with Maximum Service Temperature 1550 °C and Cold Crushing Strength minimum 65 to 100 MPa depending on curing/firing condition. The CH-MJZ80 grade (Al2O3 content minimum 80%) is the high-demand variant, with Maximum Service Temperature 1550 °C and Cold Crushing Strength minimum 70 to 105 MPa depending on curing/firing condition. The CH-MJZ85 grade (Al2O3 content minimum 85%) is the highest-demand variant, with Maximum Service Temperature 1600 °C and Cold Crushing Strength minimum 75 to 110 MPa depending on curing/firing condition. All four grades deliver Bulk Density minimum 2.7 to 2.9 g/cm3 depending on grade, Normal Wear maximum 5 to 7.5 cm3 depending on grade, Refractoriness Under Load minimum 1450 to 1560 °C depending on grade, Thermal Shock Resistance minimum 20 to 25 cycles at 900 °C water cooling, and Permanent Linear Change maximum 0.2 to 0.3 percent after 1400 °C firing for 3 hours for CFB boiler anti-wear lining service.
CH Refractories is a Corundum-mullite high-strength wear-resistant refractory castable manufacturer in China, Henan, Zhengzhou. The complete Corundum-mullite high-strength wear-resistant refractory castable product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each batch is supported by free consultation, on-site technical support, and a dedicated engineering team serving Refractories for Power and Petrochemical Industry customers across the global power and petrochemical value chain.
