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Silica mullite brick

Silica mullite brick is a newly developed refractory brick in China, which is for replace the magnesia spinel brick at transition zone of cement rotary kiln. It has a higher cost-performance ratio.

Other name: High alumina SiC brick, Special high alumina brick

Model Number: HCR-I, HCR-1650, HCR-1680, HCR-1450, HCR-1550

Certification: ISO 9001-14001

Minimum Order Quantity: 5 MT


Silica mullite brick

Introduction
      Silica mullite chooses high quality mullite and first-grade silicon carbide as its raw material, adding some auxiliary materials like zircon sand, grinding additive and so on to optimize its internal structure.

Characteristics
       1. High refractoriness under load. (actual test RUL data is >1680℃ )
       2. Strong mechanical strength, good anti-stripping and well wear resistance
       3. Low thermal conductivity, good heat insulation capability
       4. Good thermal shock resistance
       5. Moderate density which can reduce load for the kiln shell

Physical & Chemical

Item

HCR-I

HCR-1650

HCR-1680

HCR-1450

HCR-1550

Al2O3 (%)  

≥68

≥65

≥65

≥58

≥60

SiC (%)

24

20

22

16

18

Bulk Density (g/cm3)

2.7

2.6

2.65

2.45

2.5

Cold Crushing Strength Mpa  

>130

>100

>110

>90

>90

Refractoriness under load of 0.2 Mpa (℃)

1660

1600

1650

1550

1580

Refractoriness  (℃)  

>1790

>1790

>1790

>1790

>1790

Apparent Porosity (% )

<18

<18

<18

<20

<20

Performance Linear Change (%)

+0.2

0.2

0.2

0.2

0.2

Thermal Shock Resistance (times)

>20

>20

>20

>15

>15

Application

Silica mullite brick mainly be used in cement rotary kiln. Based on the strict requirement from cement rotary kiln, HCR-I si-mo brick mainly be used for transition zone and cooling zone; HCR 1650/1680 usually be used in preheating zone, calcining zone, wear resistance pier, tertiary air duct bend zone in decomposition furnace; HCR-1450/1550 can be used in preheating zone, calcining zone, high-wear part of grate cooler and other parts where be wash against high speed wind and so on.


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