MgO-Cr2O3 Brick

The MgO-Cr₂O₃ Brick represents a premium refractory solution for the most demanding high-temperature applications where conventional refractories fail. Cavalry understands that copper smelting, waste incineration, and certain steelmaking applications require refractories with exceptional corrosion resistance and thermal stability. These magnesia-chrome refractories address these challenges through carefully engineered compositions and precise manufacturing processes.

The MgO-Cr₂O₃ system provides outstanding resistance to acid and basic slags, metal penetration, and thermal shock. The chromia (Cr₂O₃) component forms complex spinel phases with magnesia that provide exceptional chemical stability in aggressive environments. These spinel phases resist dissolution in both acid and basic slags, making MgO-Cr₂O₃ refractories suitable for applications where slag chemistry varies. The high magnesia content provides excellent resistance to basic slag attack, while the chromia enhances resistance to acid slags and metal penetration.

The six available grades provide options for different operational requirements. The ZMGe-16A and ZMGe-16B grades with 16% Cr₂O₃ and 50-55% MgO offer maximum chromia content for the most aggressive slag environments. The ZMGe-12A and ZMGe-12B grades with 12% Cr₂O₃ and 55-60% MgO provide balanced properties for general applications. The ZMGe-8A and ZMGe-8B grades with 8% Cr₂O₃ and 60-65% MgO offer a more economical option for less demanding applications.

The physical properties demonstrate the high quality of these refractories. Apparent porosity of 18-20% provides a structure that balances slag penetration resistance with thermal shock tolerance. Bulk density of 3.0-3.05 g/cm³ ensures dense structures for corrosion protection. Cold crushing strength of 30-35 MPa provides adequate structural integrity during installation and service. The refractoriness under load of 1580-1620°C demonstrates the high-temperature capability of these magnesia-chrome refractories, suitable for the most demanding industrial applications.

Product highlights

Six Grade Options for Application Flexibility
The MgO-Cr₂O₃ brick range includes six grades with Cr₂O₃ content from 8% to 16% and MgO content from 50% to 65%. This range allows selection of optimal chromia content for specific applications, from waste incineration to copper smelting and steelmaking.

Exceptional Corrosion Resistance
The MgO-Cr₂O₃ system provides outstanding resistance to both acid and basic slags. The chromia component forms complex spinel phases with magnesia that resist dissolution in aggressive slag environments. This dual resistance makes these refractories suitable for applications with varied slag chemistry.

Excellent Metal Penetration Resistance
The dense structure and chromia component provide excellent resistance to metal penetration. The spinel phases reduce the pathways for molten metal penetration. This resistance extends service life in applications with metal contact.

Superior Thermal Shock Resistance
The MgO-Cr₂O₃ system provides good thermal shock resistance for applications with temperature fluctuations. The spinel structure reduces the formation of brittle phases. The thermal shock stability supports reliable performance in cyclic temperature environments.

High Bulk Density for Corrosion Protection
Bulk density of 3.0-3.05 g/cm³ provides dense structures for corrosion protection. The dense structure reduces slag penetration and slows the corrosion process. Higher density grades offer maximum protection in aggressive applications.

Good Cold Crushing Strength
Cold crushing strength of 30-35 MPa provides adequate structural integrity during installation and service. The strength provides reliable handling characteristics and installation performance. The strength supports resistance to mechanical stress during operation.

High Refractoriness Under Load
Refractoriness under load of 1580-1620°C demonstrates the high-temperature capability of these refractories. The high refractoriness ensures dimensional stability at extreme temperatures. The thermal stability supports reliable performance in demanding applications.

Controlled Apparent Porosity
Apparent porosity of 18-20% provides a balanced structure for slag penetration resistance and thermal shock tolerance. The porosity control supports predictable performance across different grades.

Proven Performance in Copper Smelting
MgO-Cr₂O₃ bricks have demonstrated reliable performance in copper smelting applications where slag attack is severe. The proven track record provides confidence in performance and service life.