Home Brick for Cement/Lime Kiln Magnesia Chrome Brick for Cement/Lime Kiln

Magnesia Chrome Brick for Cement/Lime Kiln

Magnesia Chrome Brick for Cement/Lime Kiln (MK) made of magnesia and chromite, processed by high temperature sintering. MK are most extensively used in the world. They are used at burning zone and transition zone of cement kilns. They are adaptive to any conditions and economical. With properties of good clinker coating,sound thermal shock resistance, good heat load weariness resistance,good chemical corrosion resistance,good thermal fatigue resistance, good oxidation-reduction resistance.  Disadvantages are hazardous to environment. OSYMEN therefore developed low chrome magnesia chrome bricks or chrome free products as alternatives to traditional MK products.

Magnesia chrome Brick for Cement Kiln

Magnesia-Chrome Brick in Cement and Lime Kilns

Magnesia-chrome brick are a type of refractory material extensively used in high-temperature industrial processes, including cement and lime kilns. Their unique properties and composition make them highly suitable for these demanding environments.

 

Magnesia Chrome Brick In Cement Kilns

Composition and Properties:

  • Made from magnesia and chromite, magnesia-chrome bricks (MK) are processed through high-temperature sintering.
  • They offer excellent clinker coating, sound thermal shock resistance, heat load weariness resistance, chemical corrosion resistance, thermal fatigue resistance, and oxidation-reduction resistance.

Applications and Advantages:

  • These bricks are primarily used in the burning zone and transition zone of cement kilns.
  • They adapt well to various conditions and are economical. Additionally, they help in enhancing the performance of the kiln skin and prolonging the lining life in cement kilns.
  • However, they have environmental disadvantages, as they can be hazardous. This has led to the development of low chrome or chrome-free alternatives​​.

 

Magnesia Chrome Brick In Lime Kilns

Composition and Features:

  • Semi-rebonded magnesia-chrome brick, a variant of magnesia-chrome bricks, consist of partially fused magnesia chrome sand.
  • Their main mineral composition includes periclase, spinel, and a small amount of silicate, providing a structure that is favorable for thermal shock resistance.

Applications and Advantages:

  • These bricks are primarily used in the lime kilns, especially in zones prone to significant wear and tear.
  • They have a compact structure, low porosity, good high-temperature strength, and better thermal shock resistance compared to Direct-Bonded Magnesia-Chrome Brick (DMK).
  • In addition to lime kilns, they are also used in various parts of the steelmaking process and in rotary cement kilns.
  • Semi-rebonded magnesia-chrome bricks are cost-effective and can, within certain limits, replace direct-bonded magnesia-chrome bricks​​​​.

 

Summary

Magnesia-chrome bricks play a crucial role in the operation of cement and lime kilns, offering a blend of durability, resistance to high temperatures, and thermal shock. While their use in cement kilns has prompted environmental concerns leading to the development of less hazardous alternatives, in lime kilns, particularly with semi-rebonded variants, they remain a cost-effective and resilient choice. This underscores the ongoing evolution in refractory technology to meet industrial requirements while addressing environmental concerns.

 

Refrateknik1 We can produce Refratechnik standard Magnesia Chrome Brick for Cement Kiln, such as:
PX 83S

OSYMEN

MgO

Al2O3
+Cr2O3

AP

BD

CCS

RUL

TSR, 950°C

TE

1100°C

%

%

%

g/cm3

MPa

(Ta)°C

Air Cycles

%

MK-4A

78.0

Cr2O3: 2-4

17.0

2.95

65

>1700

>100

1.05

MK-4B

76.0

Cr2O3:  2-4

18.0

2.92

60

>1680

>100

1.05

MK-9A

80.0

6-9

18.0

2.95

50

>1680

>100

1.03

MK-9B

78.0

6-9

19.0

2.92

45

>1660

>80

1.03

AP: Apparent Porosity   |  BD: Bulk Density  |  CCS: Cold Crushing Strength  |  RUL: Refractories Under Load  |  TSR: Thermal Shock Resistance  |  TE: Thermal Expansion

Products

Last updated: 2024-01-03
TOPTOP
print
CopyRight © www.osymen.com All Rights Reserved.