Castables for Working Layer for Steel Industry
Application Industry: Refractories for Steel Industry
Application Equipment: Ladle Bottom and Sidewall Lining
Size: Pre-mixed monolithic castable with custom grain size (free engineering on request)
Products Overview
Our Castables for Working Layer is a high-quality monolithic castable product engineered for ladle bottom and sidewall lining service. The product family is manufactured from high-purity corundum, magnesium aluminate spinel, and fused MgO as the main aggregates, by superfine powder bonding technology with appropriate additives, showing good placement properties, high strength, better volume stability, corrosion and abrasion resistance, and thermal shock resistance.
The Castables for Working Layer product family is offered in four engineering-proven GBJ chemistry grades. The CH-GBJ88 grade features alumina content minimum 88% and magnesia content 3%-10% for large-and medium-size ladles. The CH-GBJ85 grade features alumina content minimum 85% and magnesia content 3%-10% for large-and medium-size ladles. The CH-GBJ80 grade features alumina content minimum 80% and magnesia content 5%-15% for small-and medium-size ladles. The CH-GBJ75 grade features alumina content minimum 75% and magnesia content 6%-18% for small-and medium-size ladles slag zone service.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Castables for Working Layer grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Refractories for the Steel Industry category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured from high-purity corundum, magnesium aluminate spinel, and fused MgO as the main aggregates
- Engineering-proven superfine powder bonding technology with appropriate additives for ladle lining service
- Good placement properties, high strength, better volume stability, and thermal shock resistance
- Suitable for large-and medium-size ladles together with MgO-C brick for slag zone lining
- Four GBJ chemistry grades covering alumina content 75%-88% and magnesia content 3%-18% for matching different ladle sizes
Product Specification
Pre-mixed monolithic castable is engineered per buyer’s ladle bottom and sidewall design. Custom chemistry and grain size available on request.
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Brands
Items
|
CH-GBJ88 | CH-GBJ85 | CH-GBJ80 | CH-GBJ75 |
|---|---|---|---|---|
| Al2O3 content (%) | ≥ 88 | ≥ 85 | ≥ 80 | ≥ 75 |
| MgO content (%) | 3~10 | 3~10 | 5~15 | 6~18 |
| Bulk Density (g/cm³) | ≥ 3.05 | ≥ 3.00 | ≥ 2.90 | ≥ 2.80 |
| Cold Crushing Strength (MPa) | ≥ 40 (110 °C, 24h) |
≥ 40 (110 °C, 24h) |
≥ 35 (110 °C, 24h) |
≥ 35 (110 °C, 24h) |
| ≥ 65 (1550 °C, 3h) |
≥ 65 (1550 °C, 3h) |
≥ 60 (1550 °C, 3h) |
≥ 60 (1550 °C, 3h) |
|
| Permanent Linear Change (%) | 0~+1.0 (1550 °C, 3h) |
0~+1.0 (1550 °C, 3h) |
0~+1.0 (1550 °C, 3h) |
0~+1.0 (1550 °C, 3h) |
| Application | Bottom and sidewall of large-and medium-size ladle | Sidewall bottom and Slag zone of small size ladle | ||
Note: Seven performance parameters specified: Al2O3 content, MgO content, Bulk Density, Cold Crushing Strength, Permanent Linear Change, and Application. Four GBJ chemistry grades engineered for ladle bottom and sidewall lining service. For project-specific chemistry and geometry, contact CH Refractories engineering.
Product Applications
Castables for Working Layer is a monolithic castable product manufactured from high-purity corundum, magnesium aluminate spinel, and fused MgO as the main aggregates, with superfine powder bonding technology and appropriate additives. The product family shows good placement properties, high strength, better volume stability, corrosion and abrasion resistance, and thermal shock resistance, designed for bottom and sidewall lining of large-and medium-size ladles together with MgO-C brick for slag zone service.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Ladle Bottom and Sidewall Lining of small, medium-size, and large ladles in steelmaking operations.
Specific Application Zones: The CH-GBJ88 grade (alumina content minimum 88%, magnesia content 3%-10%) and CH-GBJ85 grade (alumina content minimum 85%, magnesia content 3%-10%) are the high-alumina workhorses for large-and medium-size ladle bottom and sidewall lining. The CH-GBJ80 grade (alumina content minimum 80%, magnesia content 5%-15%) and CH-GBJ75 grade (alumina content minimum 75%, magnesia content 6%-18%) are the mid-alumina variants for small-and medium-size ladle bottom and slag zone lining service. All four grades deliver Bulk Density 2.80 to 3.05 g/cm³, Cold Crushing Strength 35 to 40 MPa at 110 °C for 24 hours and 60 to 65 MPa at 1550 °C for 3 hours, with Permanent Linear Change 0 to +1.0 percent after 1550 °C firing for 3 hours.
CH Refractories is a Castables for Working Layer manufacturer in China, Henan, Zhengzhou. The complete Castables for Working Layer 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 the Steel Industry customers across the global iron and steel value chain.
