Castable for DRI kiln
Application Industry: Refractories for Industrial Furnace
Application Equipment: DRI Kiln Preheating Zone and Reduction Zone Lining
Size: Custom castable for DRI kiln geometry per DRI kiln design (free engineering on request)
Products Overview
Our Castable for DRI kiln is a high-performance refractory castable product engineered for DRI kiln preheating zone and reduction zone lining service. Low cement castables for DRI kiln produced by Zhengzhou caihua adopt low iron mullite, flint clay as the main raw material and have the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics for DRI kiln service.
The Castable for DRI kiln product family is offered in two engineering-proven HZ chemistry grades. The CH-HZ45 grade features Al2O3 content minimum 45% and Fe2O3 content maximum 1.2% for general DRI kiln service, with Bulk Density minimum 2.3 g/cm3 after 110 °C drying for 24 hours, Cold Crushing Strength minimum 50 MPa after 110 °C drying for 24 hours and minimum 45 MPa after 1400 °C firing for 3 hours, Permanent Linear Change maximum 1.0 percent after 1200 °C firing for 3 hours, CO Erosion Resistance Intact after 500 °C drying for 24 hours, Thermal Conductivity maximum 1.00 W/m.k at 800 °C hot side, Maximum Service Temperature 1200 °C, and Application for Preheating zone. The CH-HZ60 grade features Al2O3 content minimum 60% and Fe2O3 content maximum 1.2% for higher-demand DRI kiln service, with Bulk Density minimum 2.4 g/cm3, Cold Crushing Strength minimum 55 MPa after 110 °C drying for 24 hours and minimum 50 MPa after 1000 °C firing for 3 hours, Permanent Linear Change maximum 1.0 percent after 1400 °C firing for 3 hours, CO Erosion Resistance Intact after 500 °C drying for 24 hours, Thermal Conductivity maximum 1.1 W/m.k at 800 °C hot side, Maximum Service Temperature 1400 °C, and Application for Reduction zone.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Castable for DRI kiln grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Refractories for Industrial Furnace category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Using low-iron mullite and flint clay as the main raw material, these low cement castables for DRI kiln are characterized with high strength, good thermal shock resistance, and excellent CO erosion resistance
- Engineering-proven produced by Zhengzhou caihua with low-iron mullite, flint clay as the main raw material and have the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics
- Two HZ chemistry grades covering Al2O3 content 45-60% and Fe2O3 content maximum 1.2% for matching different DRI kiln service requirements
- Bulk Density minimum 2.3 to 2.4 g/cm3 and Cold Crushing Strength minimum 50 to 55 MPa depending on grade and curing/firing condition for DRI kiln service
- Thermal Conductivity maximum 1.0 to 1.1 W/m.k at 800 °C hot side and Maximum Service Temperature 1200 to 1400 °C depending on grade for DRI kiln service
Product Specification
Castable for DRI kiln
Low cement castables for DRI kiln produced by Zhengzhou caihua adopt low iron mullite, flint clay as the main raw material and have the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics.
| Brands / Items | CH-HZ45 | CH-HZ60 |
|---|---|---|
| Al2O3 (%) ≥ | 45 | 60 |
| Fe2O3 (%) ≤ | 1.2 | 1.2 |
| Bulk density (g/cm³) ≥ | 2.3 | 2.4 |
| Cold crushing strength (MPa) ≥ | 50 (110°C, 24h) 45 (1400°C, 3h) |
55 (110°C, 24h) 50 (1000°C, 3h) |
| Permanent linear change (%) | ±1.0 (1200°C, 3h) |
±1.0 (1400°C, 3h) |
| CO erosion resistance | Intact (500°C, 24h) |
Intact (500°C, 24h) |
| Thermal conductivity | ≤1.00 (Hot side 800°C) |
≤1.1 (Hot side 800°C) |
| Max service temperature (°C) | 1200 | 1400 |
| Application | Preheating zone | Reduction zone |
Note: Nine performance parameters specified per source image: Al2O3, Fe2O3, Bulk density, Cold crushing strength, Permanent linear change, CO erosion resistance, Thermal conductivity, Max service temperature, and Application. Two CH-HZ chemistry grades engineered for DRI kiln preheating zone and reduction zone service. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
Castable for DRI kiln is a high-performance refractory castable product engineered for DRI kiln preheating zone and reduction zone lining service. Low cement castables for DRI kiln produced by Zhengzhou caihua adopt low iron mullite, flint clay as the main raw material and have the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics for DRI kiln service.
Application Industry: Refractories for Industrial Furnace.
Target Equipment: DRI Kiln Preheating Zone and Reduction Zone Lining of small, medium-size, and large industrial furnace operations.
Specific Application Zones: The CH-HZ45 grade (Al2O3 content minimum 45%) is the standard variant for general DRI kiln preheating zone service, with Bulk Density minimum 2.3 g/cm3, Cold Crushing Strength minimum 45-50 MPa depending on curing/firing condition, Thermal Conductivity maximum 1.00 W/m.k, and Application for Preheating zone. The CH-HZ60 grade (Al2O3 content minimum 60%) is the higher-demand variant for DRI kiln reduction zone service, with Bulk Density minimum 2.4 g/cm3, Cold Crushing Strength minimum 50-55 MPa depending on curing/firing condition, Thermal Conductivity maximum 1.1 W/m.k, and Application for Reduction zone. Both grades deliver CO Erosion Resistance Intact after 500 °C drying for 24 hours, Permanent Linear Change maximum 1.0 percent after 1200-1400 °C firing for 3 hours, and Maximum Service Temperature 1200 to 1400 °C depending on grade for DRI kiln preheating zone and reduction zone service.
CH Refractories is a Castable for DRI kiln manufacturer in China, Henan, Zhengzhou. The complete Castable for DRI kiln 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 Industrial Furnace customers across the global industrial furnace value chain.
