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Category Archives: Magnesia Bricks Series

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Jun 30, 2021
Sintered Magnesia Bricks

Technical Data of magnesia bricks:

Items Physical and Chemical characters
M-98 M-97A M-97B M-95A M-95B M-97 M-89
MgO % ≥ 97.5 97.0 96.5 95.0 94.5 91.0 89.0
SiO2 % ≤ 1.00 1.20 1.5 2.0 2.5 – –
CaO %≤ – – – 2.0 2.0 3.0 3.0
Apparent Porosity   % ≤ 16 16 18 16 18 18 20
Bulk Density g/cm3 ≥ 3.0 3.0 2.95 2.90 2.85
Cold Crushing Strength  MPa ≥ 60 60 60 60 50
0.2Mpa Refractoriness Under Load ℃≥ 1700 1700 1650 1560 1500
Permanent linear change  % 1650℃×2h  -0.2~0 1650℃×2h -0.3~0 1600℃×2h -0.5~0 1600℃×2h -0.6~0

Application of Magnesia bricks:

Magnesia bricks are mainly used for steel-making alkaline open-hearth, electric furnace bottom and wall, oxygen converter lining, non-ferrous metal smelting furnace, high-temperature tunnel kiln, short magnesia brick, and cement rotary kiln lining, furnace bottom and wall of heating furnace, glass Kiln regenerator, etc.

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Jun 30, 2021
Magnesia Chrome Bricks

Magnesia Chorme Brick Features & Benefits

1. Low bulk density, low thermal conductivity, good thermal insulation performance.
2. Refractory category allow direct contact of fire, suitable for various atmosphere
3. Good integrity with furnace lining, long service life, easy operation, could be shaped freely
4. Product specification: standard form, normal standard, shaped and special shaped bricks.
5. Can be used in various kilns because of its cheapness and general tray package. Among all of the refractory materials, it is the most widely used.

Technical Data of Magnesia Chrome Bricks:

Common Magnesia Chrome Brick

 Items Physical and Chemical characters
MGe-16A MGe-16B MGe-12A MGe-12B MGe-8A MGe-8B
MgO % ≥ 60 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
Refractoriness Under Load °C≥ 1650 1550 1650 1550 1650 1530

Direct-Bonded Magnesia Chrome Brick

 Items Physical and Chemical characters
ZMGe-16A ZMGe-16B ZMGe-12A ZMGe-12B ZMGe-8A ZMGe-8B ZMGe-6
MgO % ≥ 60 58 68 65 75 70 75
Cr2O3 % ≥ 16 16 12 12 8 8 6
SiO2 % 1.5 2.5 1.5 2.5 1.5 2.5 2.5
Apparent Porosity % ≤ 18 18 18 18 18 18 18
Cold Crushing Strength MPa ≥ 40 40 45 45 45 45 45
Refractoriness Under Load °C ≥ 1700 1650 1700 1650 1700 1650 1700

Fused rebonded Magnesia Chrome Brick

Items Physical and Chemical characters
DMGe-26 DMGe-24 DMGe-22 DMGe-20A DMGe-20B DMGe-16A DMGe-16B DMGe-12A DMGe-12B
MgO % ≥ 50 50 55 58 58 62 58 68 65
Cr2O3 % ≥ 26 24 22 20 20 16 16 12 12
SiO2 % 1.5 1.5 1.5 1.5 2.0 1.5 2.0 1.5 2.0
Apparent Porosity % ≤ 16 16 16 16 17 16 17 16 17
Cold Crushing Strength MPa ≥ 40 40 40 40 40 40 40 40 40
Refractoriness Under Load °C ≥ 1700 1700 1700 1700 1700 1700 1700 1700 1700

Fused semi-rebonded Magnesia Chrome Brick

 Items Physical and Chemical characters
BMGe-26 BMGe-24 BMGe-22 BMGe-20A BMGe-20B BMGe-

18

 BMGe-16A BMGe-16B BMGe-12A BMGe-12B
MgO % ≥ 50 50 55 58 55 58 60 55 68 65
Cr2O3 % ≥ 26 24 22 20 20 18 16 16 12 12
SiO2 % 2.0 2.0 2.0 2.0 2.5 2.0 2.0 2.5 2.0 2.5
Apparent Porosity % ≤ 16 16 16 16 16 16 16 17 16 16
Cold Crushing Strength MPa ≥ 40 40 40 40 35 40 40 35 40 35
Refractoriness Under Load °C ≥ 1700 1700 1700 1700 1700 1700 1700 1700 1700 1700

Application of Magnesia Chrome Bricks:

Magnesia chrome bricks are mainly used in cement rotary kilns, glass kiln regenerators, steelmaking furnace linings, refining steel cladding, non-ferrous metallurgy furnaces, lime kilns, iron mixers and refractory high-temperature furnace linings.

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Jun 30, 2021
Magnesia Carbon Bricks

Magnesia Carbon bricks are very mature product in our area. As our area has 1/4 world storage of best quality Magnesia ore, we can provide as good quality as European Mg-C bricks with competitive prices. We also provide basic refractory lining solution for CONVERTER, EAF, LF, LADLE, etc. these industrial furnaces.

Technical Data of Magnesia Carbon Bricks

Items MC8 MC10 MC12 MC14 MC18
Apparent porosity% ≤ 5.0 4.0 4.0 3.0 3.0
Bulk density g/cm3 ≥ 3.00 3.00 2.98 2.95 2.92
Cold  Crushing Strength  MPa≥ 50 40 40 35 35
Chemical
composition%		 MgO ≥ 84 82 76 76 72
C ≥ 8 10 12 14 18
Application General use Corrosion Resistance Extra Corrosion Resistance

Magnesia Carbon Bricks Applications

Magnesia carbon bricks are widely used in converters, and their performance is very good, unit refractory consumption is significantly reduced. Besides, MgO-C bricks are also widely used in high power electric furnace wall hot point, secondary refining furnace inner lining, steel ladle slag line and so on. When magnesia carbon bricks are applied in steel ladles, they should not contact with SiO2 containing refractory, or magnesia carbon bricks will have larger molten erosion.

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Jun 30, 2021
Magnesia Iron Spinel Bricks

Magnesia iron spinel bricks is a type of new product developed by ourselves independently by the conclusion of years’ working experience and combining the advanced technology of related large scale cement kilns at home and abroad. Which has already obtained the national invention patent. Magnesia ferrite spinel brick was successfully developed in the year of 2005, which has already been widely used in the firing zone of 5000d/t cement kilns at home and abroad and warmly. Warmly welcomed by the customers.

Magnesia Iron Spinel Refractory Brick Introduction

Magnesia-iron spinel bricks use high-purity magnesia sand and Al-Fe spinel sand as the main raw materials through reasonable proportioning, high-pressure molding, strictly control over the firing temperature and firing atmosphere to make the products have good flexibility and thermal shock stability, and no hexavalent chromium pollution for cement kiln burning zone. The product is high volume stability, high load softening temperature, excellent thermal shock, sticking kiln coating properties and erosion resistance exceeding high quality magnesia-chrome brick, and have small reaction to cement clinker, the impact of the kiln skin off far less than magnesia-chrome brick. Proved by the usage, they not only have long life, smooth debris surface, and also no hazards of chromium.

Magnesia Iron Spinel Refractory Brick Technique Data

item Magnesia-iron spinel brick High toughness magnesia-iron spinel brick
MgO% ≥ 85 88
Fe2O3% 5-7.5 5/6
SiO2% ≤ 2 1.5
Al2O3% ≤ 3.0-5.0 4.0-7.0
Apparent porosity%≥ 17 16
volume density g/cm3 ≥ 3 2.9
cold compressive strength Mpa ≥ 45 55
0.2MPa refractoriness under load, ℃ ≥ 1600 1650
Thermal shock stability(1100℃~water cooling), times                                                   ≥ 6 8
Thermal conductivity W/MK ≤ 2.6 2.6
Thermal expansion % (1400℃)≤ 1.6 1.7

Magnesia Iron Spinel Refractory Brick Advantages

1. Excellent adhering coating performance
2. Low thermal conductivity （1000℃，27w/m·k）, small thermal expansion coefficient（1000℃，1..217%）
3. Excellent structural flexibility, strong penetration resistance and anti-erosion to alkali salt content of K2SO4、Na2SO4、NaCl、KCl decomposed by cement material.
4. High refractoriness under load, excellent thermal shock resistance, used in key parts of sp kilns and NSP kilns with high temperature ,fast speed, strong anti-erosion and great mechanical load.

Magnesia Iron Spinel Refractory Brick Application

Magnesia ferrite spinel brick mainly used in the cement rotary kiln sintering zone.

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Jun 30, 2021
Magnesia Alumina Spinel Brick

Magnesium Aluminum Spinel Brick Introduction

Magnesia Alumina Spinel Bricks are classified into ordinary models and high-quality models according to raw material grades. RS brand magnesia alumina spinel bricks adopt high purity fused magnesia and spinel as main raw materials, their main crystalline phases are periclase and spinel, so they are also called periclase spinel bricks. Magnesia Alumina Spinel Bricks have very good high-temperature performance. Impurity content, especially CaO content, is very low in magnesia alumina spinel bricks.

Magnesia-Alumina Spinel Brick is in order to improve the heat stability of magnesia brick, add alumina oxide in ingredient to generate the magnesia brick which the main material is magnesia-alumina spinel. The advantage of magnesia-alumina spinel brick: good heat stability, in the process of use, it will have a reaction with clinker and produce a thin layer of calcium aluminate maskant, which makes the liquid not easy to penetrate, its anti-stripping performance is better than the directly bonded magnesia chrome brick.

Magnesia Alumina Spinel Bricks advantages

Good thermal shock resistance
High hot mechanical strength
High refractoriness under load
Excellent alkaline slag corrosion resistance

Magnesia Alumina Spinel Brick Physiochemical Index

Item Type-1 Type-2 Type-3 Type-4
MgO % 84 83 86 85
Al2O3 % 13.5 13.0 11.5 11.0
CaO % 1.1 1.2 1.1 1.2
Fe2O3 % 0.7 1.0 0.7 1.1
Apparent porosity % 17 17 17 17
Bulk density g/cm3 2.94 2.94 2.94 2.94
Crushing strength Mpa 60 55 60 55
Refractoriness under load ℃ 1700 1680 1700 1680
Thermal shock resistance /times(1100℃, water cooling) 10 5~10 10 5~10

Magnesia Alumina Spinel Bricks Applications

The main applications of magnesia alumina spinel bricks are rotary cement kilns, glass kiln checker-work, iron mixing furnaces, refractory material sintering kilns, and so on. Compared with magnesia chrome bricks, magnesia alumina spinel bricks have stronger alkaline vapor corrosion resistance, better free SOx corrosion resistance, better oxidization-reduction atmosphere change resistance, etc.

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