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Help CenterWholesale High Performance Magnesium Magnesite Refractory Bricks Magnesia Firebrick for Industrial Furnaces Kilns
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Magnesia bricks
Introduction:
Magnesia Brick is a kind of excellent alkaline refractory material. These bricks contain over 90% magnesium oxide content and adopt periclase as the principal crystalline phase. Many magnesia refractory products also contain silicate, spinel, or other ingredients. However, the properties of the main crystalline phase periclase and the behavior at high temperatures directly control the performance of the magnesia refractory.
Magnesia Bricks have excellent performance of superior high-temperature mechanical strength and volume stability. Magnesia Brick is mainly used in basic open-hearth furnaces for steelmaking, electric furnace, rotary cement kiln, heating furnace, glass furnaces, and hyperthermia tunnel kilns with properties of higher refractoriness, good basic slag erosion resistance, and high apparent initial softening temperature. Magnesia Bricks can service at a high temperature of 1750℃. Magnesia Bricks are widely used in the permanent lining of steel furnaces, lime kilns, glass kilns, ferroalloy furnaces, mixers, non-ferrous metal smelting furnaces, etc. They are ideal construction materials for glass kiln applications.
Magnesia bricks can generally be divided into two categories: sintered magnesia bricks and chemically bonded magnesia bricks (also known as unfired ones). Magnesia bricks with high purity and high firing temperature become directly bonded magnesia bricks due to direct contact with periclase grains. Bricks made with fused magnesia as raw materials are called combined magnesia bricks. Sintered magnesia bricks are sintered at a high temperature of 1550~1600℃ after crushing, batching, mixing, and forming. The sintering temperature of high-purity products is above 1750℃. Unburned magnesia bricks are made by adding the proper amount of chemical bonding agent to magnesia. It is made by mixing, molding, and drying.
Magnesia Bricks Properties
· Magnesia bricks are generally yellowish-white in color
· They have excellent thermal resistance and great compressive strength
· Their chemical composition drastically differs from the chemical composition of normal bricks
· They also contain oxides of magnesium, calcium, and potassium
· They can withstand temperatures up to 2100 degrees Celsius
· They have an incredible thermal capacity that helps different structures to remain stable at extreme temperatures.
Chemical & Technical Index
Item/Model |
XHJMZ-98 |
XHJMZ-95A |
XHJMZ-93 |
XHJMZ-91 |
XHJMZ -89 |
XHJMZ-87 |
MgO % |
≥98 |
≥95 |
≥93 |
≥91 |
≥89 |
≥87 |
SiO2 % |
≥1.0 |
≥2.0 |
≥2.0 |
≥3.0 |
≥3.0 |
≥3.1 |
CaO % |
- |
≤2.0 |
≤2.5 |
≤3 |
≤3 |
≤3 |
Apparent Porosity % |
≤16 |
≤17 |
≤18 |
≤18 |
≤20 |
≤20 |
Bulk Density % |
≥3.0 |
≥3.0 |
≥2.95 |
≥2.90 |
≥2.90 |
≥2.85 |
Cold Crushing Strength (MPa) |
≥60 |
≥60 |
≥60 |
≥54 |
≥51 |
≥50 |
Linear Change On Reheating (1650℃, 2h) |
≤0.2 |
≤0.4 |
≤0.5 |
≤0.5 |
≤0.6 |
– |
Refractoriness Under Load 0.2MPa ℃ |
≥1700 |
≥1650 |
≥1630 |
≥1560 |
≥1550 |
≥1540 |
Characteristics
Excellent refractoriness
High resistance to chemical attack
High flexibility
Coating friendly
High resistance to thermal loads
Low thermal conductivity
Low porosity
Application
Electric furnace bottom and wall
Non-ferrous metal metallurgy furnace
The lining of the rotary cement kiln
Regenerative chamber of glass furnace
Rolling Mill
Packing & Shipping
1. Strong packing will protect the goods from any possible damage during transit.
2. Solid packing and overall stuffing can prevent packages from vibration and jarring.
3. Strict & standard packing can protect goods from pilferage or rain.
1. Pallet + plastic film + Carton+ fixed band,
2. Pallet + plastic film + fixed band .
3. pallets: 1*1m, 0.93*0.93m .
4. Gross weight: 1.6~2.0 tons.
5. packaging according to customer service requirements.
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