High strength alkali resistant castable
Application Industry: Refractories for Cement Industry
Application Equipment: Cement Kiln Door Cover, Decomposition Furnace, Preheater System, and Pipeline System
Size: Custom alkali resistant castable geometry per cement kiln service design (free engineering on request)
Products Overview
Our High strength alkali resistant castable is a high-performance refractory product engineered for cement kiln industrial furnace lining service. The high-strength and alkali-resistant castable has good resistance to alkaline gas and slag, and has a long service life. This material is mainly used for lining of other industrial furnaces such as kiln door cover, decomposition furnace, preheater system, and pipeline system, with stable quality and good engineering performance.
The High strength alkali resistant castable product family is offered in two engineering-proven NJZ chemistry grades. The CH-NJZ48 grade features Al2O3 content maximum 48% and SiO2 content minimum 50% for general cement kiln industrial furnace lining service, with Bulk Density 2.2-2.4 g/cm3, Cold Crushing Strength minimum 60 MPa after 110 °C curing for 24 hours and minimum 60 MPa after 1100 °C firing for 3 hours, Modulus of Rupture minimum 7 MPa after 110 °C curing for 24 hours and minimum 7 MPa after 1100 °C firing for 3 hours, Permanent Linear Change ±0.4 percent after 1100 °C firing for 3 hours, and Maximum Service Temperature 1300 °C. The CH-NJZ45 grade features Al2O3 content maximum 45% and SiO2 content minimum 53% for higher-demand cement kiln industrial furnace lining service, with Cold Crushing Strength minimum 70 MPa, Modulus of Rupture minimum 8 MPa, and Maximum Service Temperature 1350 °C. Both grades deliver Alkali Resistance Grade 1-2 for cement kiln service.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each High strength alkali resistant castable grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Refractories for Cement Industry category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured from high-purity alkali resistant raw materials with high strength and alkali resistance formulation
- Engineering-proven good resistance to alkaline gas and slag erosion, and long service life for cement kiln industrial furnace lining service
- Two NJZ chemistry grades covering Al2O3 content maximum 45%-48% and SiO2 content minimum 50%-53% for matching different cement kiln service requirements
- Bulk Density 2.2-2.4 g/cm3 after 110 °C curing for 24 hours with good volume stability
- Maximum Service Temperature 1300 to 1350 °C with Alkali Resistance Grade 1-2 for cement kiln industrial furnace service
Product Specification
The high-strength and alkali-resistant castable has good resistance to alkaline gas and slag, and has a long service life. This material is mainly used for lining of other industrial furnaces such as kiln door cover, decomposition furnace, preheater system and pipeline system.
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Brands
Items
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CH-NJZ48 | CH-NJZ45 | |
|---|---|---|---|
| Al2O3 (%) ≤ | 48 | 45 | |
| SiO2 (%) ≥ | 50 | 53 | |
| Bulk density (g/cm³) ≥ (110°C × 24h) |
2.2~2.4 | 2.2~2.4 | |
| Flexural strength (MPa) ≥ | 110°C × 24h | 7 | 8 |
| 1100°C × 3h | 7 | 8 | |
| Compressive strength (MPa) ≥ | 110°C × 24h | 60 | 70 |
| 1100°C × 3h | 60 | 70 | |
| Line rate of change PLC (%) ≤ (1100°C × 3h) |
±0.4 | ±0.4 | |
| Alkali resistance | 1~2 | 1~2 | |
| Maximum Service temperature (°C) | 1300 | 1350 | |
Note: Eight performance parameters specified: Al2O3 content, SiO2 content, Bulk density, Flexural strength, Compressive strength, Line rate of change, Alkali resistance, and Maximum Service temperature. Two NJZ chemistry grades engineered for cement kiln industrial furnace lining service. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
High strength alkali resistant castable is a high-performance refractory product manufactured from high-purity alkali resistant raw materials with high strength and alkali resistance formulation, engineered for cement kiln industrial furnace lining service. The product family has good resistance to alkaline gas and slag, and has a long service life. This material is mainly used for lining of other industrial furnaces such as kiln door cover, decomposition furnace, preheater system, and pipeline system, with stable quality and good engineering performance.
Application Industry: Refractories for Cement Industry.
Target Equipment: Cement Kiln Door Cover, Decomposition Furnace, Preheater System, and Pipeline System of small, medium-size, and large cement kilns in cement industry operations.
Specific Application Zones: The CH-NJZ48 grade (Al2O3 content maximum 48%, SiO2 content minimum 50%) is the standard variant for general cement kiln industrial furnace lining service, with Maximum Service Temperature 1300 °C. The CH-NJZ45 grade (Al2O3 content maximum 45%, SiO2 content minimum 53%) is the higher-demand variant for cement kiln industrial furnace lining service, with Maximum Service Temperature 1350 °C. Both grades deliver Bulk Density 2.2-2.4 g/cm3, Cold Crushing Strength minimum 60 to 70 MPa depending on grade, Modulus of Rupture minimum 7 to 8 MPa depending on grade, and Alkali Resistance Grade 1-2.
CH Refractories is a High strength alkali resistant castable manufacturer in China, Henan, Zhengzhou. The complete High strength alkali resistant 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 Cement Industry customers across the global cement value chain.
