Refractories for RH refining
Application Industry: Refractories for Steel Industry
Application Equipment: RH Vacuum Degassing Furnace
Size: Custom refractories geometry per RH furnace design (free engineering on request)
Products Overview
Our Refractories for RH refining is a comprehensive refractory product family engineered for RH vacuum degassing furnace service. CH Refractories has the capability to design and manufacture full range of refractories used for RH furnace and can supply general refractory contractors. According to the usage characteristics of different parts of RH furnace, our company developed series of magnesia-chrome bricks, immersion tubes, and corresponding supporting refractory materials, including Si3N4-bonded SiC bricks for alloy feeding chute, corundum spinel castable, refractory mortar, ramming mix, and repair mix series products, with the overall contractor capability of RH refining furnace refractories.
The Refractories for RH refining product family is offered in six engineering-proven MAC, MCM, and MD chemistry grades covering three material systems. The Corundum Spinel Castable sub-system includes CH-MAC80 and CH-MAC90 grades for tube service, with MgO+Al2O3 content minimum 80%-90%. The Magnesia Chrome Mortar sub-system includes CH-MCM20 and CH-MCM10 grades for dipping tube and magnesia-chrome bricks installation, with MgO content minimum 55%-60% and Cr2O3 content minimum 8%-18%. The Ramming/Repair Mix sub-system includes CH-MD50 and CH-MD90 grades for brick joint filling and repair, with MgO content 45%-87%. All six grades are characterized with high refractoriness under load, high strength, good erosion resistance, and thermal shock resistance.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, the Refractories for RH refining product family 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:
- Complete product family including corundum spinel castable, magnesia chrome mortar, and ramming/repair mix for RH furnace service
- Engineering-proven high refractoriness under load, good erosion resistance, high strength, and thermal shock resistance
- Six MAC, MCM, and MD chemistry grades covering MgO+Al2O3 content 80%-90%, MgO content 45%-60%, and Cr2O3 content 8%-18%
- Designed for different RH furnace service zones: tube, dipping tube, magnesia-chrome bricks installation, and brick joint filling
- Total refractory contractor capability for RH furnace complete service package
Product Specification
CH Refractories has the capability to design and manufacture full range of refractories used for RH furnace and can supply general refractory contractors. These materials are characterized with high refractoriness under load, high strength, good erosion resistance and thermal shock resistance.
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Brands
Items
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Corundum spinel castable | Magnesia chrome mortar | Ramming / repair mix | |||
|---|---|---|---|---|---|---|
| CH-MAC80 | CH-MAC90 | CH-MCM20 | CH-MCM10 | CH-MD50 | CH-MD90 | |
| MgO+Al2O3 (%) | ≥ 80 | ≥ 90 | — | — | — | — |
| MgO (%) | — | — | ≥ 55 | ≥ 60 | 45 | 87 |
| Cr2O3 (%) | — | — | ≥ 18 | ≥ 8 | — | — |
| Cold Crushing Strength (MPa) | ≥ 30 | ≥ 60 | — | — | ≥ 30 | ≥ 30 |
| Permanent linear change (%) | 0~+0.8 | 0~+0.8 | — | — | -0.5~+0.5 | -0.5~+0.5 |
| Bonding time (min) | — | — | 1~3 | 1~3 | — | — |
| Bonding strength (MPa) | — | — | ≥ 1.5 | ≥ 1.5 | — | — |
| Main application | Tube | Dipping tube | Apply to install the magnesia-chromes bricks | Apply to fill brick joints and repair | ||
Note: The Refractories for RH refining product family is a comprehensive product package including corundum spinel castable, magnesia chrome mortar, ramming/repair mix, and supporting materials. All products are characterized with high refractoriness under load, high strength, good erosion resistance, and thermal shock resistance for RH vacuum degassing furnace service. For project-specific chemistry and geometry, contact CH Refractories engineering.
Product Applications
Refractories for RH refining is a comprehensive refractory product family manufactured from high-quality raw materials, engineered for RH vacuum degassing furnace service. CH Refractories has the capability to design and manufacture full range of refractories used for RH furnace and can supply general refractory contractors. The product family features high refractoriness under load, high strength, good erosion resistance, and thermal shock resistance. According to the usage characteristics of different parts of RH furnace, the product family includes corundum spinel castable, magnesia chrome mortar, ramming/repair mix, and supporting materials like Si3N4-bonded SiC bricks for alloy feeding chute.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: RH Vacuum Degassing Furnace of small, medium-size, and large RH furnaces in steelmaking secondary refining operations.
Specific Application Zones: The Corundum Spinel Castable sub-system (CH-MAC80, CH-MAC90) is engineered for tube service, with MgO+Al2O3 content minimum 80%-90%. The Magnesia Chrome Mortar sub-system (CH-MCM20, CH-MCM10) is engineered for dipping tube and magnesia-chrome bricks installation, with MgO content minimum 55%-60% and Cr2O3 content minimum 8%-18%. The Ramming/Repair Mix sub-system (CH-MD50, CH-MD90) is engineered for brick joint filling and repair, with MgO content 45%-87%. The product family features cold crushing strength minimum 30 to 60 MPa depending on grade and sub-system, permanent linear change -0.5 to +0.8 percent depending on grade, and bonding time 1-3 min with bonding strength minimum 1.5 MPa for mortar grades.
CH Refractories is a Refractories for RH refining manufacturer in China, Henan, Zhengzhou. The complete Refractories for RH refining 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.
