Hgih Quality Good Corrosion Resistance Magnesia Ferrum Spinel
Refractory Brick
Magnesia iron spinel brick is made of high quality synthetic spinel
raw materials and made a special process, the magnesia iron spinel
bricks have high crushing strength, good thermal shock resistance,
thermal creep characteristics of good performance, high
refractoriness under load, but magnesite iron spinel brick also has
direct combination magnesite chrome brick is easy to stick to hang
the characteristics of the kiln, solved the cement kiln with
magnesite chrome bricks in use process to generate the problem of
hexavalent chromium pollution to the environment.
Magnesia Iron Spinel Brick Description
Magnesium iron spinel refractory brick has the excellent kiln skin
properties of dolomite brick and magnesia chrome brick, the
magnesia iron spinel brick has high refractoriness and strong anti
oxidation and reduction and mechanical stress functions. There are
significant improvements. Magnesia iron spinel firebrick has the
characteristics of high compressive strength, good thermal shock
resistance, good thermal creep resistance, erosion resistance and
permeability, high load softening temperature, and magnesia iron
spinel firebrick also easier to stick kiln skin than direct
combination of magnesia chrome brick. The characteristics can
effectively solve the problem of causing pollution to the
environment by generating hexavalent chromium during the use of
magnesia chrome bricks for cement kiln.
Properties of Magnesia Iron Spinel Brick
.Low thermal expansion coefficient,
.Alkali slag resistance,
.Spalling resistance,
.Good creep resistance,
.Good thermal shock resistance.
Manufacturing Process of Magnesia Iron Spinel Brick
Magnesia iron spinel fire brick uses 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 magnesium iron
spinel fire brick has 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
Advantages of Magnesia Iron Spinel Brick
Magnesia iron spinel firebrick has the advantages of small thermal
expansion coefficient and high thermal conductivity, which can
significantly reduce the thermal stress of the refractory magnesium
iron spinel brick. Due to different thermal expansion coefficients
of various phases, in firing During the process, a large number of
microcracks are present inside the material, thereby increasing the
toughness of the material. Therefore, the magnesia alumina spinel
brick has good flexibility and thermal shock resistance.
Magnesia Iron Spinel Brick Specifications
| Item | Magnesium Iron Spinel Brick |
| Chemical Composition | Mgo | 87-91 |
| Fe2o3 | 4-6 |
| Bulk Density | g/cm3 | 3.0 |
| Apparent Porosity | % | 16 |
| Cold crushing strength | Mpa | 60 |
| Refractoriness under load | ℃ | 1650 |
| Thermal expansion percent | % | 400℃ | 0.4 |
| 800℃ | 0.9 |
| 1200℃ | 1.5 |
| Thermal conductivity | W/m.k | 300℃ | 3.7 |
| 700℃ | 3.0 |
| 1000℃ | 2.8 |
| Thermal shock resistance(time)950 | ℃ | 100 |
Application of Magnesia Iron Spinel Brick
Magnesium iron spinel firebrick has been widely used in firing
belts and upper transition belts in the cement rotary kiln,
becoming a new variety to replace magnesia chrome bricks in
conventional raw fuel production lines. And magnesia iron spinel
firebrick is used as working linings of burning zone in various
cement kiln such as Lepol kiln, wet process kiln and new dry cement
kiln.
