PRODUCT DESCRIPTION

Magnesia Chrome Brick

Magnesia chrome bricks are basic refractory materials composed of high-purity magnesia and premium-grade chrome concentrate. Depending on the manufacturing process, they are classified into Direct-Bonded, Rebonded, and Semi-Rebonded magnesia-chrome bricks. Direct-bonded and rebonded variants are fired at ultra-high temperatures up to1700°C, allowing periclase and spinel crystals to bond directly. This structure minimizes the silicate phase and provides superior high-temperature performance.

Advantages

• Superb Slag Resistance: Provides excellent chemical resistance to both basic slags and moderately acidic slags, making them highly versatile.

• High Refractoriness Under Load (RUL): Maintains excellent structural integrity and volume stability at temperatures exceeding 1650°C to 1700°C.

• Good Thermal Shock Resistance: The introduction of chrome creates a complex spinel structure, lowering the thermal expansion coefficient and significantly reducing spalling compared to pure magnesia bricks.

• Low Melt Infiltration: High density and tight grain boundaries physically restrict the penetration of molten metals and slags into the brick lining.

• Excellent Erosion Resistance: Resists heavy mechanical wash and abrasive wear from high-velocity molten metal and gas streams.

Main Applications

1. Non-Ferrous Metallurgy

• Smelting Furnaces: Widely used in the critical zones (tuyere lines, slag lines, and roofs) of copper, nickel, lead, and zinc converters, flash furnaces, and reverberatory furnaces.

2. Iron and Steel Industry

• Secondary Refining Vessels: Lining materials for RH (Ruhrstahl-Heraeus) degassers, VOD (Vacuum Oxygen Decarburization) ladles, and AOD (Argon Oxygen Decarburization) converters processing high-alloy steels.

3. Cement Industry

• Rotary Kilns: Used in the transition and burning zones of large-scale cement kilns due to their excellent coating-holding capability.

4. Glass Furnace

• Glass Furnace Regenerators: Used in top and middle layers of checker-work, regenerator target walls to withstand intense thermal cycling, high-velocity, abrasive exhaust stream containing      volatile alkaline vapors and carry-over batch dust.

Detailed Storage Guidelines

1. Storage Location

• Dry & Ventilated Indoor Storage: The bricks must be stored in a dry, well-ventilated warehouse.

• Climate Control: Maintain a stable temperature and low humidity in the warehouse to prevent condensation caused by temperature drops.

2. Moisture Protection

• Elevated Storage: Keep the brick pallets on racks or raised platforms. Ensure they are at least 15-20 cm off the ground and 50cm  off the wall to avoid rising dampness or flooring moisture.

• Ventilation and Moisture Dissipation: After removing the magnesia bricks from the container, place them in a well-ventilated area for a few days to dissipate any residual moisture absorbed during maritime transit

• Original Packaging Sealed: Keep the original seaworthy packaging (plastic shrink wrap and strapping) intact until the moment of installation. Do not open the wrap early.

3. Handling & Stacking

• First-In, First-Out (FIFO): Implement a FIFO inventory system to minimize the total storage time of the bricks.

   TECHNIQUE DATA