Zhengzhou Zhongkeda Refractory Materials Co., Ltd
Magnesite Chrome Brick
Magnesia Chrome Brick – High-Performance Refractory Solution for Industrial Furnaces
Magnesia-chrome bricks are alkaline refractory materials composed mainly of magnesium oxide (MgO) and chromium oxide (Cr₂O₃), produced through high-temperature sintering or fusion processes. Their key characteristics include high refractoriness and strong slag resistance, making them widely used as linings in industrial furnaces operating in high-temperature and chemically complex environments.
Characters of Magnesia Chrome Bricks:
•High Refractoriness: With a refractoriness of ≥1800℃, it can be used continuously at high temperatures ranging from 1600-1800℃.
•Strong Slag Resistance: Excellent resistance to both alkaline slag (e.g., steelmaking slag) and acidic slag (e.g., copper smelting slag).
•Excellent Thermal Shock Stability: Superior resistance to rapid heating and cooling compared to magnesia bricks (withstanding 10-20 cycles), with Cr₂O₃ helping to mitigate thermal stress crack propagation.
•High-Temperature Strength: Refractoriness under load (RUL) ≥1550℃, and cold crushing strength (CCS) ≥40 MPa.
Application scenarios of Magnesia-chrome bricks:
•🔥Steel industry: Ladles, EAF roofs, converters
•🛠️Non-ferrous metallurgy: Copper and nickel smelting furnaces
•🏗️Cement rotary kilns: Transition and burning zones
•🫙Glass furnaces: Regenerators and checker chambers
Different Types of Magnesia-Chrome Bricks:
•Ordinary Magnesia-Chrome Brick: Made from regular magnesia and refractory-grade chromite.
•Direct-Bonded Magnesia-Chrome Brick: Made from high-purity magnesia and chrome concentrate.
•Fused Rebonded Magnesia-Chrome Brick: Made primarily from fused magnesia-chrome sand.
•Fused Semi-Rebonded Magnesia-Chrome Brick: Made from a combination of fused magnesia-chrome sand, sintered magnesia, chromite, or pre-reacted magnesia-chrome sand.
Parameters of Magnesia-chrome bricks:
| MgO | Cr₂O₃(%) | SiO₂ | Apparent Porosity | Bulk Density | Cold Crushing Strength | 0.2MPa Refractoriness Under Load | Thermal Shock Resistance 1100°Water Cool | ||
| Item | (%)≥ | （%）≥ | (%)≤ | (%)≤ | （g/cm³)/% | (MPa)≥ | (℃) ≥ | (times) | |
| Ordinary Magnesia Chrome Bricks | MGe-8 | 65 | 8~10 | 6 | 20 | 2.95 | 35 | 1600 | 3 |
| MGe-12 | 60 | 12~14 | 4.5 | 20 | 3 | 35 | 1600 | 3 | |
| MGe-16 | 55 | 16~18 | 3.5 | 18 | 3.05 | 45 | 1700 | 4 | |
| Direct Bonded Magnesia Chrome Bricks | ZMGe-8 | 78 | 8~11 | 2 | 18 | 3.05 | 45 | 1680 | 6 |
| ZMGe-12 | 72 | 12~15 | 1.8 | 18 | 3.1 | 45 | 1700 | 5 | |
| ZMGe-16 | 62 | 16~19 | 1.8 | 18 | 3.1 | 45 | 1700 | 5 | |
| Fused Semi-recombined Magnesia Chrome Bricks | BMGe-16 | 62 | 16~18 | 1.7 | 17 | 3.15 | 50 | 1700 | 6 |
| BMGe-20 | 58 | 20~22 | 1.5 | 16 | 3.15 | 45 | 1700 | 5 | |
| BMGe-24 | 53 | 24~26 | 1.5 | 16 | 3.2 | 45 | 1700 | 5 | |
| BMGe-26 | 50 | 26~28 | 1.5 | 16 | 3.2 | 45 | 1700 | 5 | |
| Fused Recombined Magnesia Chrome Bricks | RBTRMC-16 | 65 | 16~19 | 1.5 | 16 | 3.2 | 55 | 1700 | 5 |
| RBTRMC-20 | 60 | 20~23 | 1.2 | 16 | 3.25 | 60 | 1700 | 5 | |
| RBTRMC-24 | 55 | 24~27 | 1.5 | 16 | 3.2 | 60 | 1700 | 5 | |
| RBTRMC-28 | 50 | 28~31 | 1.5 | 17 | 3.26 | 60 | 1700 | 4 |
Q: What is the difference between Magnesia Chrome Bricks and Magnesia Bricks?
A:Magnesia Chrome Bricks contain both magnesia (MgO) and chromite (Cr₂O₃), offering better corrosion and thermal shock resistance compared to pure magnesia bricks. They are particularly effective in basic slag environments and metal smelting applications.
Q: Do you offer customized sizes and compositions?
A:Yes, we provide OEM and custom solutions based on your technical requirements. This includes:
•Customized dimensions and shapes
•Specific MgO/Cr₂O₃ ratios
•Packaging with private labeling
Feel free to send us your drawing or specification for a tailored solution.
Q:How do you pack and ship Magnesia Chrome Bricks for export?
A:We pack bricks in fumigated wooden pallets or wooden boxes with waterproof wrapping and edge protection to prevent damage during transit. Our logistics team ensures on-time global shipping with full export documentation support.
Q:What is your minimum order quantity (MOQ)?
A:For export orders, our typical MOQ is 20 tons (1x20ft container). However, trial orders or sample orders can be arranged for new partners to test product quality.
Q:Are your Magnesia Chrome Bricks environmentally friendly?
A:Yes. We follow strict environmental and safety standards in raw material selection and production. Our bricks are low in impurities, and Cr⁶⁺ content is controlled, ensuring they meet global environmental compliance.
Q:Do you support long-term B2B partnerships?
A:Yes. We work with global distributors, contractors, and industrial end-users to build long-term cooperation. Exclusive pricing, regional protection, and steady supply can be negotiated for large-scale partners.
