Magnesia Brick

Ordinary magnesia bricks (sintered magnesia bricks) are basic refractory materials made from high-quality dead-burned magnesia (sintered magnesia) as the main raw material. Shaped under high pressure and fired at temperatures above 1500°C, their primary m

MgO: 92-97%

Bulk Density:2.9-2.97g/cm3

Cold Crushing Strength: 75-89MPa

0.2MPa Refractoriness Under Load T0.6: 1600-1700℃



   PRODUCT DESCRIPTION

Sintered Magnesia Bricks

Description

Ordinary magnesia bricks (sintered magnesia bricks) are basic refractory materials made from high-quality dead-burned magnesia (sintered magnesia) as the main raw material. Shaped under high pressure and fired at temperatures above 1500°C, their primary mineral phase is periclase (MgO). They usually feature an MgO content ranging from 89% to 98%. They are highly valued for their exceptional resistance to basic environments.

 

Advantages

l  Strong Basic Slag Resistance: Excellent chemical resistance to basic slags, iron oxides, and high-calcium materials.

l  High Refractoriness: Refractoriness is over 2000°C.

l  High Load-Bearing Capacity: High refractoriness under load, offering structural stability at elevated temperatures.

l  Excellent Mechanical Strength: High bulk density and cold crushing strength, making them highly resistant to mechanical wear and abrasion.

l  Good Thermal Conductivity: Efficiently conducts heat, which is essential for specialized heat storage or dissipation systems.

 


Applications

1. Iron and Steel Industry

· Steelmaking Furnaces: Lining for the working layer and safety layer of basic Open-Hearth furnaces and EAFs (Electric Arc Furnaces).

· Mixer Furnaces & Ladles: Used in the slag line zones and bottom linings to resist basic steel slag.

2. Non-Ferrous Metallurgy

· Smelting Furnaces: Used in the linings of copper, lead, zinc, and nickel smelting furnaces and converters.

3. Glass Industry

· Regenerators: Widely used in the upper structures, target walls, and bottom layers of checker bricks in glass furnace regenerators.

4. Cement & Lime Industry

· Rotary Kilns: Used in the transition zones of cement kilns and the high-temperature burning zones of lime kilns.

 

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

Item

MZ-92

MZ-95

MZ-96

MZ-97

MZ-98

Chemical composition %

MgO    ≥

92.5

94.5

95.5

96.5

97

SiO2    

3.6

2

1.6

0.9

0.8

CaO    ≤

1.8

1.6

1.5

1.3

1.2

Apparent Porosity    ≤

18

18

16

16

16

Bulk Density g/cm3    

2.90

2.92

2.96

2.96

2.97

Cold Crushing Strength MPa ≥

75

86

89

88

81

0.2Mpa Refractoriness Under Load T0.6

≥1600

≥1680

≥1700

≥1700

≥1700

Permanent Linear Change On Reheating%1500℃X2h

0+0.4

0+0.4

0+0.4

0+0.4

0+0.4


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