Direct Bonded Magnesia Chrome Bricks are premium basic refractory materials manufactured from high-purity magnesia and low-impurity chromite. Through firing at temperatures above 1700°C, a strong direct bond is formed between periclase and chromite grains, minimizing the amount of silicate phase and significantly improving high-temperature performance.

Compared with ordinary magnesia chrome bricks, direct bonded magnesia chrome bricks feature lower impurity content, stronger slag resistance, higher refractoriness under load, and excellent thermal shock resistance. These characteristics make them ideal for severe operating environments in cement, steel, glass, and non-ferrous metallurgy industries.

By utilizing carefully selected raw materials and advanced manufacturing technology, our Direct Bonded Magnesia Chrome Bricks provide long service life, reduced maintenance frequency, and improved operational efficiency.

Physicochemical Parameters

Item/Grade	MGe-16A	MGe-16B	MGe-12A	MGe-12B	MGe-8A	MGe-8B
MgO (%)	≥ 50	≥ 45	≥ 60	≥ 55	≥ 65	≥ 60
Cr2O3 (%)	≥ 16	≥ 16	≥ 12	≥ 12	≥ 8	≥ 8
Apparent Porosity (%)	≤ 19	≤ 22	≤ 19	≤ 21	≤ 19	≤ 21
Cold Crushing Strength (MPa)	≥ 35	≥ 25	≥ 35	≥ 30	≥ 35	≥ 30
0.2MPa Refractoriness Under Load (°C)	≥ 1650	≥ 1550	≥ 1650	≥ 1550	≥ 1650	≥ 1530
Thermal Shock Resistance (Cycles)	≥ 10	≥ 10	≥ 12	≥ 10	≥ 12	≥ 10

Product Features

High Refractoriness Under Load: With a refractoriness under load of up to 1700°C, these bricks maintain structural integrity and mechanical strength under extreme temperatures.
Excellent Slag Resistance: The direct bonding structure and low impurity content provide outstanding resistance against alkaline slags and chemical erosion.
Superior Thermal Shock Stability: Direct Bonded Magnesia Chrome Bricks exhibit excellent resistance to rapid temperature changes. Under 1100°C water-cooling conditions, they can withstand multiple thermal shock cycles without severe cracking.
Low Impurity Content: The SiO₂ content is generally below 2%, and even below 1% for premium grades, ensuring better high-temperature performance and longer service life.
High Mechanical Strength: Cold crushing strength reaches 50–55 MPa, enabling the bricks to withstand heavy mechanical loads and harsh operating conditions..

Applications

Direct Bonded Magnesia Chrome Bricks are widely used in various high-temperature industrial furnaces, including:

Rotary Cement Kilns: Ideal for burning zones and transition zones where resistance to clinker corrosion and thermal shock is critical.
Electric Arc Furnaces: Provide durable linings for steelmaking furnaces operating under severe thermal and chemical conditions.
RH and VOD Refining Furnaces: Suitable for upper and lower vessel linings and vacuum refining units requiring excellent corrosion resistance.
Non-Ferrous Metal Smelting Furnaces: Widely used in copper, nickel, and other non-ferrous metallurgical furnaces.
Glass Regenerative Chambers: Offer excellent resistance to high-temperature gas flow and chemical attack.
Lime Kilns and Iron Mixers: Ensure stable operation and prolonged service life in lime production and molten iron transportation systems.

Customization Services

We provide customized Direct Bonded Magnesia Chrome Bricks according to specific furnace conditions and customer requirements.:

Custom Sizes: Standard dimensions are available, while customized sizes can be manufactured to fit different equipment designs.
Special Shapes: We offer custom shapes such as arch bricks, anchor bricks, and more for complex geometries.
Performance Specifications: Our products can be adjusted to meet specific temperature, wear, and strength conditions to match your operational needs.

Packing and Shipping Details

To ensure safe transportation, our Direct Bonded Magnesia Chrome Bricks are carefully packaged using robust and environmentally friendly materials.:

Packaging Material: We use durable, eco-friendly materials to protect the bricks during shipping.
Bulk Orders: Large orders are palletized for added security and ease of handling.
Custom Packaging: Custom packaging is available upon request to meet specific storage or shipping requirements.

About Xintai Refractory

Xintai Refractory is a professional manufacturer with more than 20 years of experience in producing high-performance refractory materials. Our product portfolio includes refractory bricks, castables, ramming masses, insulating materials, and monolithic refractories.

Serving industries such as steel, cement, glass, ceramics, petrochemicals, and non-ferrous metallurgy, we are committed to delivering reliable refractory solutions with consistent quality and competitive prices.

With advanced production equipment, strict quality control, and comprehensive technical support, Xintai Refractory has become a trusted partner for customers worldwide.

Looking for reliable refractory solutions for your high-temperature applications? Contact us today for more information about our Direct Bonded Magnesia Chrome Bricks and receive a free quotation.