MgO / MgO-CaO / Forsterite Based Dry Masses
Application Industry: Refractories for Steel Industry
Application Equipment: EAF Bottom Tap-Hole and Ladle Permanent Lining
Size: Custom dry mass grain size per EAF tap-hole and ladle lining design (free engineering on request)
Products Overview
Our MgO / MgO-CaO / Forsterite Based Dry Masses is a high-performance refractory dry mass engineered for EAF bottom tap-hole and ladle permanent lining service. These products are made from high quality magnesite and Fe2O3-CaO magnesite, and show the features of excellent resistance against steel penetration, superior erosion resistance, easily-sintering, high bulk density, and easy installation. The products are easy to install and dismantle after use and perform well with extended service life, which are highly appreciated by steel mills.
The MgO / MgO-CaO / Forsterite Based Dry Masses product family is offered in five engineering-proven GM and TMG chemistry grades with two material systems. The MgO/Forsterite based system includes CH-GM70, CH-GM80, CH-GM85, and CH-GM88 grades. The CH-GM70 grade features MgO content maximum 70% for general ladle permanent lining service. The CH-GM80 grade features MgO content minimum 70% for higher-magnesia ladle permanent lining. The CH-GM85 grade features MgO content minimum 80% for high-magnesia ladle permanent lining. The CH-GM88 grade features MgO content minimum 88% for highest-magnesia ladle permanent lining. The MgO-CaO based system includes CH-TMG15 grade, featuring MgO content minimum 70% and CaO content 10%-20% for EAF tap-hole and ladle permanent lining service with high CaO-MgO performance. All five grades deliver Bulk Density 1.8-2.4 g/cm³ after 220 °C curing for 24 hours, Permanent Linear Change −2.5 to 0 percent for MgO/Forsterite grades and −3.0 to 0 percent for MgO-CaO grade after 1500 °C firing for 3 hours, and Cold Crushing Strength minimum 2 to 7 MPa after 220 °C curing for 3 hours and minimum 3 to 5 MPa after 1500 °C firing for 3 hours.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each MgO / MgO-CaO / Forsterite Based Dry Masses 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-quality magnesite, magnesium aluminate spinel, forsterite, and quartz-based materials with suitable additives
- Engineering-proven simple installation, appropriate sinterability, and strong resistance against molten steel penetration
- Non-floating property and high self-opening rate for EAF tap-hole filling service
- Easy to install and dismantle after use with extended service life for steel mill operations
- Five GM and TMG chemistry grades covering MgO content 70%-88% and CaO content 10%-20% for matching different EAF and ladle lining service requirements
Product Specification
MgO / MgO-CaO / Forsterite based dry masses are engineered per buyer’s EAF tap-hole and ladle lining design. Custom chemistry and grain size available on request.
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Brands
Items
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MgO / Forsterite based | MgO-CaO based | |||
|---|---|---|---|---|---|
| CH-GM70 | CH-GM80 | CH-GM85 | CH-GM88 | CH-TMG15 | |
| MgO content (%) | < 70 | ≥ 70 | ≥ 80 | ≥ 88 | ≥ 70 |
| CaO content (%) | — | — | — | — | 10~20 |
| Bulk Density (g/cm³) | 1.8~2.2 (220 °C, 24h) |
2.1~2.3 (220 °C, 24h) |
2.1~2.4 (220 °C, 24h) |
2.1~2.4 (220 °C, 24h) |
2.0~2.2 (220 °C, 24h) |
| Permanent Linear Change (%) | −2.5~0 (1500 °C, 3h) |
−2.5~0 (1500 °C, 3h) |
−2.0~0 (1500 °C, 3h) |
−1.5~0 (1500 °C, 3h) |
−3.0~0 (1500 °C, 3h) |
| Cold Crushing Strength (MPa) | ≥ 2 (220 °C, 3h) |
≥ 5 (220 °C, 3h) |
≥ 6 (220 °C, 3h) |
≥ 7 (220 °C, 3h) |
≥ 5 (220 °C, 3h) |
| ≥ 3 (1500 °C, 3h) |
≥ 3 (1500 °C, 3h) |
≥ 4 (1500 °C, 3h) |
≥ 5 (1500 °C, 3h) |
≥ 5 (1500 °C, 3h) |
|
Note: Five performance parameters specified: MgO content, CaO content, Bulk Density, Permanent Linear Change, and Cold Crushing Strength. Five GM and TMG chemistry grades engineered for EAF tap-hole and ladle lining service in two material systems: MgO/Forsterite based and MgO-CaO based. For project-specific chemistry, contact CH Refractories engineering.
Product Applications
MgO / MgO-CaO / Forsterite Based Dry Masses is a high-performance refractory dry mass manufactured from high quality magnesite, magnesium aluminate spinel, forsterite, and quartz-based materials with suitable additives, engineered for EAF bottom tap-hole and ladle permanent lining service. The product family features excellent resistance against steel penetration, superior erosion resistance, easily-sintering, high bulk density, and easy installation, with extended service life for steel mill operations.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: EAF Bottom Tap-Hole and Ladle Permanent Lining of small, medium-size, and large EAF and ladles in steelmaking operations.
Specific Application Zones: The CH-GM70 grade (MgO/Forsterite based, MgO content maximum 70%) is the standard variant for general ladle permanent lining service. The CH-GM80 grade (MgO content minimum 70%) is the higher-magnesia variant for ladle permanent lining. The CH-GM85 grade (MgO content minimum 80%) is the high-magnesia variant for demanding ladle permanent lining. The CH-GM88 grade (MgO content minimum 88%) is the highest-magnesia variant for ladle permanent lining. The CH-TMG15 grade (MgO-CaO based, MgO content minimum 70%, CaO content 10%-20%) is engineered for EAF tap-hole and ladle permanent lining service with high CaO-MgO performance. All five grades deliver Bulk Density 1.8-2.4 g/cm³ after 220 °C curing for 24 hours, Permanent Linear Change −3.0 to 0 percent after 1500 °C firing for 3 hours, and Cold Crushing Strength minimum 2-7 MPa after 220 °C curing and minimum 3-5 MPa after 1500 °C firing for 3 hours.
CH Refractories is an MgO / MgO-CaO / Forsterite Based Dry Masses manufacturer in China, Henan, Zhengzhou. The complete MgO / MgO-CaO / Forsterite Based Dry Masses 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.
