Tertiary air duct appropriative castable
Application Industry: Refractories for Cement Industry
Application Equipment: Cement Kiln Tertiary Air Duct
Size: Custom tertiary air duct castable geometry per cement kiln design (free engineering on request)
Products Overview
Our Tertiary air duct appropriative castable is a high-performance castable engineered for cement kiln tertiary air duct service. The appropriative castable for tertiary air duct has the characteristics of high strength, good wear resistance, erosion resistance, erosion resistance and no cracking, with stable quality and good engineering performance for cement kiln tertiary air duct service.
The Tertiary air duct appropriative castable product family is offered in three engineering-proven FJZ chemistry grades. The CH-FJZ65 grade features Al2O3 content minimum 65% for general cement kiln tertiary air duct service, with Bulk Density minimum 2.6 g/cm3 after 110 °C curing for 24 hours, Cold Crushing Strength minimum 90 MPa after 110 °C curing for 24 hours and minimum 90 MPa after 1400 °C firing for 3 hours, Modulus of Rupture minimum 11 MPa after 110 °C curing for 24 hours and minimum 11 MPa after 1400 °C firing for 3 hours, Permanent Linear Change ±0.5 percent after 1400 °C firing for 3 hours, and Maximum Service Temperature 1450 °C. The CH-FJZ75 grade features Al2O3 content minimum 75% for higher-demand cement kiln tertiary air duct service, with Bulk Density minimum 2.7 g/cm3, Cold Crushing Strength minimum 100 MPa, and Modulus of Rupture minimum 12 MPa, with Maximum Service Temperature 1500 °C. The CH-FJZ80 grade features Al2O3 content minimum 80% for highest-demand cement kiln tertiary air duct service, with Bulk Density minimum 2.8 g/cm3, Cold Crushing Strength minimum 120 MPa, and Modulus of Rupture minimum 13 MPa, with Maximum Service Temperature 1600 °C.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Tertiary air duct appropriative 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:
- High-strength castable engineered for cement kiln tertiary air duct service with good wear resistance and erosion resistance
- Engineering-proven high strength, anti-erosion, anti-flushing, and no cracking performance for tertiary air duct service
- Three FJZ chemistry grades covering Al2O3 content minimum 65%-80% for matching different cement kiln tertiary air duct service temperature requirements
- Bulk Density minimum 2.6 to 2.8 g/cm3 after 110 °C curing for 24 hours with good volume stability
- Maximum Service Temperature 1450 to 1600 °C for cement kiln tertiary air duct high temperature service
Product Specification
Standard taphole clay formulation is engineered per buyer’s blast furnace capacity and taphole diameter. Three grades available: Environmental Friendly (resin), Waterless (tar), and Water-Based (water). Custom chemistry available on request.
| Items | Brands | ||
|---|---|---|---|
| Environmental Friendly Taphole Clay Resin-bonded |
Waterless Taphole Clay Tar-bonded |
Water-Based Taphole Clay Water-bonded |
|
| Al2O3 content ≥ (%) | 27 | 25 | 25 |
| SiC + C content ≥ (%) | 30 | 30 | >25 |
| Moisture (%) | <0.5 | <0.5 | 18.0 |
| Bulk Density (1350 °C × 3h) (g/cm³) | 1.60 to 2.20 | 1.60 to 2.20 | 1.40 to 1.80 |
| Cold Crushing Strength (1350 °C × 3h) ≥ (MPa) | 8.0 | 10.0 | 6.0 |
| Apparent Porosity (1350 °C × 3h) ≤ (%) | 35.0 | 32.0 | 40.0 |
Note: All three grades are measured at 1350 °C for 3 hours. The Environmental Friendly Taphole Clay uses resin as the binding agent, the Waterless Taphole Clay uses tar, and the Water-Based Taphole Clay uses water. For project-specific chemistry, contact CH Refractories engineering.
Product Applications
Tertiary air duct appropriative castable is a high-performance castable engineered for cement kiln tertiary air duct service. The appropriative castable for tertiary air duct has the characteristics of high strength, good wear resistance, erosion resistance, anti-flushing, and no cracking, with stable quality and good engineering performance for cement kiln tertiary air duct high temperature service.
Application Industry: Refractories for Cement Industry.
Target Equipment: Cement Kiln Tertiary Air Duct of small, medium-size, and large cement kilns in cement industry operations.
Specific Application Zones: The CH-FJZ65 grade (Al2O3 content minimum 65%) is the standard variant for general cement kiln tertiary air duct service, with Maximum Service Temperature 1450 °C. The CH-FJZ75 grade (Al2O3 content minimum 75%) is the higher-demand variant for cement kiln tertiary air duct service, with Maximum Service Temperature 1500 °C. The CH-FJZ80 grade (Al2O3 content minimum 80%) is the highest-demand variant for cement kiln tertiary air duct service, with Maximum Service Temperature 1600 °C. All three grades deliver Bulk Density minimum 2.6 to 2.8 g/cm3 after 110 °C curing for 24 hours, Cold Crushing Strength minimum 90 to 120 MPa depending on grade and curing/firing condition, Modulus of Rupture minimum 11 to 13 MPa depending on grade, and Permanent Linear Change ±0.5 percent after 1400 °C firing for 3 hours.
CH Refractories is a Tertiary air duct appropriative castable manufacturer in China, Henan, Zhengzhou. The complete Tertiary air duct appropriative 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.
