Castable for DRI rotary hearth furnace

Application Industry: Refractories for Industrial Furnace

Application Equipment: DRI Rotary Hearth Furnace, Preheat Area, Heating Area, and Furnace Bottom Lining

Size: Custom castable for DRI rotary hearth furnace geometry per DRI rotary hearth furnace design (free engineering on request)

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Products Overview

Our Castable for DRI rotary hearth furnace is a high-performance refractory castable product engineered for DRI rotary hearth furnace lining service. Using low-iron mullite as the main materials, these low cement castables for DRI rotary hearth furnace lining are characterized with high strength, good thermal shock resistance and excellent CO erosion resistance. The castable is produced by Zhengzhou caihua with low-iron mullite and has the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics for DRI rotary hearth furnace service.

The Castable for DRI rotary hearth furnace product family is offered in three engineering-proven HZ chemistry grades. The CH-HZ45 grade features Al₂O₃ content minimum 45% and Fe₂O₃ content maximum 1.2% for general DRI rotary hearth furnace service, with Bulk Density minimum 2.4 g/cm³ after 110 °C drying for 24 hours, Cold Crushing Strength minimum 30 MPa after 110 °C drying for 24 hours and minimum 40 MPa after 1400 °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 1.00 W/m.k at 800 °C hot side, Maximum Service Temperature 1350 °C, and Application for Roof, wall and partition at preheat area. The CH-HZ60 grade features Al₂O₃ content minimum 60% and Fe₂O₃ content maximum 1.2% for higher-demand DRI rotary hearth furnace service, with Bulk Density minimum 2.45 g/cm³, Cold Crushing Strength minimum 30 MPa after 110 °C drying for 24 hours and minimum 45 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 Roof, wall and partition at heating area. The CH-HZ65 grade features Al₂O₃ content minimum 65% and Fe₂O₃ content maximum 1.2% for highest-demand DRI rotary hearth furnace service, with Bulk Density minimum 2.65 g/cm³, Cold Crushing Strength minimum 40 MPa after 110 °C drying for 24 hours and minimum 60 MPa after 1400 °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 1.2 W/m.k at 800 °C hot side, Maximum Service Temperature 1450 °C, and Application for furnace bottom.

Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Castable for DRI rotary hearth furnace 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 as the main materials, these low cement castables for DRI rotary hearth furnace lining 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 with the properties of excellent CO erosion resistance and good thermal shock resistance
Three HZ chemistry grades covering Al₂O₃ content 45-65% and Fe₂O₃ content maximum 1.2% for matching different DRI rotary hearth furnace service requirements
Bulk Density minimum 2.4 to 2.65 g/cm³ and Cold Crushing Strength minimum 30 to 60 MPa depending on grade and curing/firing condition for DRI rotary hearth furnace service
Thermal Conductivity maximum 1.0 to 1.2 W/m.k at 800 °C hot side and Maximum Service Temperature 1350 to 1450 °C depending on grade for DRI rotary hearth furnace service

Product Specification

Castable for DRI rotary hearth furnace

Using low-iron mullite as the main materials, these low cement castables for DRI rotary hearth furnace lining are characterized with high strength, good thermal shock resistance and excellent CO erosion resistance.

Brands / Items	CH-HZ45	CH-HZ60	CH-HZ65
Al₂O₃ (%) ≥	45	60	65
Fe₂O₃ (%) ≤	1.2	1.2	1.2
Bulk density (g/cm³) ≥	2.4	2.45	2.65
Cold crushing strength (MPa) ≥	30 (110°C, 24h) 40 (1400°C, 3h)	30 (110°C, 24h) 45 (1000°C, 3h)	40 (110°C, 24h) 60 (1400°C, 3h)
Permanent linear change (%)	±1.0 (1400°C, 3h)	±1.0 (1400°C, 3h)	±1.0 (1400°C, 3h)
CO erosion resistance	Intact (500°C, 24h)	Intact (500°C, 24h)	Intact (500°C, 24h)
Thermal conductivity	≤1.00 (Hot side 800°C)	≤1.1 (Hot side 800°C)	≤1.2 (Hot side 800°C)
Max service temperature (°C)	1350	1400	1450
Application	Roof, wall and partition at preheat area	Roof, wall and partition at heating area	Furnace bottom

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. Three CH-HZ chemistry grades engineered for DRI rotary hearth furnace service. For project-specific chemistry and grade, contact CH Refractories engineering.

Product Applications

Castable for DRI rotary hearth furnace is a high-performance refractory castable product engineered for DRI rotary hearth furnace lining service. Using low-iron mullite as the main materials, these low cement castables for DRI rotary hearth furnace lining are characterized with high strength, good thermal shock resistance and excellent CO erosion resistance. The castable is produced by Zhengzhou caihua with low-iron mullite and has the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics for DRI rotary hearth furnace service.

Application Industry: Refractories for Industrial Furnace.

Target Equipment: DRI Rotary Hearth Furnace, Preheat Area, Heating Area, and Furnace Bottom 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 rotary hearth furnace service, with Bulk Density minimum 2.4 g/cm³, Cold Crushing Strength minimum 30-40 MPa depending on curing/firing condition, Thermal Conductivity maximum 1.00 W/m.k, and Application for Roof, wall and partition at preheat area. The CH-HZ60 grade (Al₂O₃ content minimum 60%) is the higher-demand variant for DRI rotary hearth furnace service, with Bulk Density minimum 2.45 g/cm³, Cold Crushing Strength minimum 30-45 MPa depending on curing/firing condition, Thermal Conductivity maximum 1.1 W/m.k, and Application for Roof, wall and partition at heating area. The CH-HZ65 grade (Al₂O₃ content minimum 65%) is the highest-demand variant for DRI rotary hearth furnace service, with Bulk Density minimum 2.65 g/cm³, Cold Crushing Strength minimum 40-60 MPa depending on curing/firing condition, Thermal Conductivity maximum 1.2 W/m.k, and Application for Furnace bottom. All three grades deliver CO Erosion Resistance Intact after 500 °C drying for 24 hours, Permanent Linear Change maximum 1.0 percent after 1400 °C firing for 3 hours, and Maximum Service Temperature 1350 to 1450 °C depending on grade for DRI rotary hearth furnace service.

CH Refractories is a Castable for DRI rotary hearth furnace manufacturer in China, Henan, Zhengzhou. The complete Castable for DRI rotary hearth furnace 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.

Product FAQ

Q1: What is castable for DRI rotary hearth furnace and what are the main applications?

A1: Castable for DRI rotary hearth furnace is a high-performance refractory castable product engineered for DRI rotary hearth furnace lining service. Using low-iron mullite as the main materials, these low cement castables for DRI rotary hearth furnace lining are characterized with high strength, good thermal shock resistance and excellent CO erosion resistance. The castable is produced by Zhengzhou caihua with low-iron mullite and has the properties of excellent CO erosion resistance, good thermal shock resistance and other good characteristics.

Q2: How many chemistry grades of castable for DRI rotary hearth furnace does CH Refractories offer?

A2: CH Refractories offers three engineering-proven HZ chemistry grades of castable for DRI rotary hearth furnace. The CH-HZ45 grade features Al₂O₃ content minimum 45% and Fe₂O₃ content maximum 1.2% for general DRI rotary hearth furnace service. The CH-HZ60 grade features Al₂O₃ content minimum 60% and Fe₂O₃ content maximum 1.2% for higher-demand DRI rotary hearth furnace service. The CH-HZ65 grade features Al₂O₃ content minimum 65% and Fe₂O₃ content maximum 1.2% for highest-demand DRI rotary hearth furnace service. All three grades are designed for DRI rotary hearth furnace lining service with high strength, good thermal shock resistance, and excellent CO erosion resistance.

Q3: What are the test conditions for castable for DRI rotary hearth furnace?

A3: Castable for DRI rotary hearth furnace delivers Bulk Density minimum 2.4 to 2.65 g/cm³ depending on grade after 110 °C drying for 24 hours. Cold Crushing Strength is minimum 30 to 60 MPa depending on grade and curing/firing condition (110 °C × 24h and 1000-1400 °C × 3h). Permanent Linear Change is maximum 1.0 percent after 1400 °C firing for 3 hours. CO Erosion Resistance is Intact after 500 °C drying for 24 hours. Thermal Conductivity is maximum 1.0 to 1.2 W/m.k at 800 °C hot side depending on grade. Maximum Service Temperature is 1350 to 1450 °C depending on grade. The castable for DRI rotary hearth furnace product family is suitable for Roof, wall and partition at preheat area, heating area, and furnace bottom DRI rotary hearth furnace service.

Q4: Can the castable for DRI rotary hearth furnace be customized to specific DRI rotary hearth furnace designs?

A4: Yes. CH Refractories offers custom chemistry, grade, and application optimization against the buyer's specific DRI rotary hearth furnace lining design and operating conditions. CH Refractories engineers can adjust Al₂O₃ content, Fe₂O₃ content, raw material formulation, and low cement binder system to meet specific DRI rotary hearth furnace service temperature and CO erosion conditions. Please send the DRI rotary hearth furnace drawing, lining design, furnace capacity, and operating temperature data to our engineering team in Xinmi City, Zhengzhou, Henan, China for a free consultation, on-site technical support, and a tailored castable for DRI rotary hearth furnace formulation proposal with optimized grade selection, raw material adjustment, and installation procedure for your specific DRI rotary hearth furnace service conditions.