Alkali resistant brick
Application Industry: Refractories for Cement Industry
Application Equipment: Cement Kiln Preheater, Decomposition Furnace, and Tertiary Air Duct
Size: Custom alkali resistant brick geometry per cement kiln design (free engineering on request)
Products Overview
Our Alkali resistant brick is a high-performance refractory product engineered for cement kiln preheater, decomposition furnace, and tertiary air duct service. The alkali-resistant bricks use silica, coke stones, and appropriate additives to improve the microstructure of the product. In the process of using, it reacts with alkaline oxide to form a high-viscosity glass phase, which covers the surface of the brick to block the surface pores, prevents the infiltration of alkaline slag, and meets the purpose of resisting alkali and resisting corrosion. Alkali-resistant bricks are widely used in large and medium-sized dry-process cement rotary kiln preheaters and decomposition furnaces.
The Alkali resistant brick product family is offered in four engineering-proven types. The Normal Type features Al2O3 content 25-30%, SiO2 content 65-70%, Refractoriness minimum 1650 °C, Bulk Density minimum 2.15 g/cm3, Apparent Porosity maximum 21%, Cold Crushing Strength minimum 35 MPa, and Refractoriness Under Load minimum 1350 °C at 0.2 MPa for general cement kiln preheater and decomposition furnace service. The High Strength Type features Al2O3 content 25-30%, SiO2 content 65-70%, Refractoriness minimum 1650 °C, Bulk Density minimum 2.25 g/cm3, Apparent Porosity maximum 20%, Cold Crushing Strength minimum 60 MPa, and Refractoriness Under Load minimum 1300 °C for higher-demand cement kiln preheater, decomposition furnace, and tertiary air duct service. The Insulated Type features Al2O3 content 25-30%, SiO2 content 60-70%, Refractoriness minimum 1650 °C, Bulk Density maximum 1.65 g/cm3, Cold Crushing Strength minimum 15 MPa, and Refractoriness Under Load minimum 1250 °C for insulated cement kiln lining service. The Vault Type features Al2O3 content 30-35%, SiO2 content 60-65%, Refractoriness minimum 1710 °C, Bulk Density minimum 2.2 g/cm3, Apparent Porosity maximum 21%, Cold Crushing Strength minimum 35 MPa, and Refractoriness Under Load minimum 1400 °C for cement kiln vault service.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Alkali resistant brick 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 silica, coke stones, and appropriate additives to improve the microstructure of the product
- Engineering-proven reacts with alkaline oxide to form a high-viscosity glass phase, covering the surface of the brick to block surface pores
- Prevents the infiltration of alkaline slag and meets the purpose of resisting alkali and resisting corrosion
- Four types covering Normal, High Strength, Insulated, and Vault type for matching different cement kiln service requirements
- Widely used in large and medium-sized dry-process cement rotary kiln preheaters and decomposition furnaces
Product Specification
The alkali-resistant bricks use silica, coke stones and appropriate additives to improve the microstructure of the product. In the process of using, it reacts with alkaline oxide to form a high-viscosity glass phase, which covers the surface of the brick to block the surface pores, prevents the infiltration of alkaline slag, and to meet the purpose of resisting alkali and resisting corrosion.
On the basis of a common type of high-strength alkali-resistant brick, it is produced by adding an additive to increase the compressive strength. The product has the characteristics of high strength, stable volume, good alkali corrosion resistance, etc. It is suitable for cement kiln preheater, decomposition furnace, tertiary air duct and other parts.
Alkali-resistant bricks are widely used in large and medium-sized dry-process cement rotary kiln preheaters and Decomposition furnaces.
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Brands
Items
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Normal type | High strength type | Insulated | Vault type |
|---|---|---|---|---|
| Al2O3 (%) ≥ | 25~30 | 25~30 | 25~30 | 30~35 |
| Fe2O3 (%) ≤ | 2 | 2 | 2 | 2 |
| SiO2 (%) | 65~70 | 65~70 | 60~70 | 60~65 |
| Refractoriness (°C) ≥ | 1650 | 1650 | 1650 | 1710 |
| Bulk density (g/cm³) ≥ | 2.15 | 2.25 | ≤ 1.65 | 2.2 |
| Apparent porosity (%) ≤ | 21 | 20 | ≥ 35 | 21 |
| Cold crushing strength CCS (MPa) ≥ | 35 | 60 | 15 | 35 |
| 0.2Mpa load softening temperature (°C) ≥ | 1350 | 1300 | 1250 | 1400 |
| Thermal conductivity average temperature 350±10°C (W/m.k) | 1.28 | 1.28 | 0.7 | 1.28 |
Note: Nine performance parameters specified: Al2O3 content, Fe2O3 content, SiO2 content, Refractoriness, Bulk density, Apparent porosity, Cold crushing strength, 0.2Mpa load softening temperature, and Thermal conductivity. Four types engineered for cement kiln preheater, decomposition furnace, tertiary air duct, and vault service. For project-specific chemistry and geometry, contact CH Refractories engineering.
Product Applications
Environmental Friendly Taphole Clay is a refractory taphole mud manufactured from corundum, alumina-silica based materials, SiC, and coke, resin-bonded. The product family delivers good filling-up, easy installation, easy sintering, easy opening, low erosion, and excellent thermal-shock stability under the harsh Blast Furnace Taphole service environment.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Blast Furnace Taphole of small, medium-size, and large Blast Furnaces.
Specific Application Zones: The Environmental Friendly Taphole Clay is used for blocking the Blast Furnace taphole, ensuring stable and high production of the Blast Furnace while reducing environmental impact in the cast house. The resin-bonded chemistry with moisture content below 0.5 percent delivers improved environment in front of the furnace, supporting high-yield Blast Furnace operation and reducing the working intensity in front of the furnace.
CH Refractories is an Environmental Friendly Taphole Clay manufacturer in China, Henan, Zhengzhou. The complete Environmental Friendly Taphole Clay product 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 the Steel Industry customers across the global iron and steel value chain.
