Your global MgO-C Brick manufacturer and supplier — delivering high-performance MgO-C Brick for EAF steelmaking and refractory engineering solutions since 1984.
Modern electric arc furnace (EAF) steelmaking has shifted dramatically with the adoption of high-oxygen injection practices, achieving primary steel production decarbonization at scale. This transformation places unprecedented demands on slag-line refractories — where MgO-C Brick serves as the primary defense against severe slag attack and thermal cycling. With40+ years of experience serving major steel mills, CH Refractories delivers high-performance MgO-C Brick engineered specifically for high-oxygen EAF operating conditions.
What Is MgO-C Brick
MgO-C Brick refers to magnesia-carbon bricks — refractory products manufactured from fused magnesia aggregate bonded with carbon (graphite) and phenolic resin binders. The combination delivers unique performance properties including high thermal shock resistance, excellent slag corrosion resistance, and superior oxidation behavior when compared to traditional magnesia-chrome refractories. ModernMgO-C Brick formulations incorporate high-purity fused magnesia (≥97% MgO) with controlled carbon content typically between10-18%.
MgO-C Brick Properties
The key properties of high-performanceMgO-C Brick include: bulk density 2.95-3.05 g/cm³, apparent porosity3-5%, cold crushing strength ≥40 MPa, high-temperature bending strength ≥12 MPa at1400°C, thermal shock resistance exceeding 30 cycles (1100°C water cooling). These properties makeMgO-C Brick the preferred choice for high-stress EAF applications including slag lines, hot spots, and sidewall zones.
MgO-C Brick in High-Oxygen EAF
High-oxygen EAF operations create extreme oxidation conditions that rapidly degrade conventional refractories. MgO-C Brick must withstand high oxygen partial pressure, increased decarburization rates, and intensified slag corrosion. Engineering responses include: (1) increased carbon content (14-18%) for slag line service; (2) metallic antioxidants like aluminum and silicon powders that protect carbon from oxidation; (3) optimized porosity reducing oxygen penetration; (4) high-purity fused magnesia aggregate for superior slag resistance.
High-oxygen injection practices in modern EAF operations have increased refractory consumption by 20-30% compared to traditional low-oxygen practices. MgO-C Brick with antioxidant protection has demonstrated service life improvements of 40-50% in slag line applications, making antioxidant-enhanced MgO-C Brick essential for cost-effective high-oxygen EAF operation.
CH Refractories MgO-C Brick Manufacturing
CH Refractories produces high-quality MgO-C Brick through a controlled manufacturing process: (1) raw material selection — high-purity fused magnesia (≥97% MgO) and flake graphite; (2) precise batching and mixing with phenolic resin binder; (3) hydraulic pressing at 200-300 MPa for uniform density; (4) low-temperature curing at 200-250°C for resin polymerization; (5) precision machining to customer-specified dimensions. Every batch undergoes strict quality control including chemical analysis, density testing, and thermal shock resistance verification.
MgO-C Brick Specifications
Standard MgO-C Brick grades offered by CH Refractories include: Grade10C (10% carbon) for general EAF sidewall; Grade 14C (14% carbon) for slag line and hot spots; Grade 18C (18% carbon) for severe service zones. All grades feature antioxidant additives (Al/Si/Mg-Al) tailored to specific oxygen exposure conditions. Custom formulations are available for unique operating conditions including high-phosphorus slag or aggressive basic oxygen environments.
For high-oxygen EAF operations, MgO-C brick selection is no longer just about slag resistance — it’s about balancing carbon retention, oxidation resistance, and thermal shock performance in a single formulation tailored to specific operating conditions.
Contact CH Refractories for MgO-C Brick engineering consultation. Our engineering team provides complete MgO-C Brick specification, zone-specific material selection, installation supervision, and lifetime after-sales service for EAF steelmakers worldwide.
CH Refractories Engineering Team
40+ years of refractory engineering experience · Steel · Cement · Glass · Nonferrous