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Blast Furnace Performance

This range normally falls between 50% and 90% alumina, ie. having refractoriness of over SK35.  The normal raw material constituents are alumina in the form of bauxite, Andalusite, Mullite or sintered / fused alumina.

Good strengths, thermal shock resistance, good / high corrosion resistance and alkali resistance are just some of the properties found within these products.

Typical applications include:
re-heating furnaces – ladles – EAF roofs – incinerators – heat treatment furnaces (reducing atmospheres where low iron is necessary) – furnace hearths – cement / lime shaft kilns – ceramic kilns and rotary furnaces etc.

Predominant applications:
ferrous – non ferrous – cement / lime incineration etc.

We have numerous supply lines of quality material and below is an example typical data sheet of one of those options.


 
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Bauxite Brick

 
Andalusite Brick
 

 

 
Bauxite Brick
   

 

 

The advantages of these products are high refractoriness, anti alkaline/acid erosions, good strength under high temperature and good thermal shock resistance. For use in thermal equipment of metallurgy, petroleum, chemical industry and construction materials etc.

Typical Analysis

A12O3
%
80.76
Fe2O3
%
1.69
TiO2
%
1.98
SiO2
%
10.21
CaO
%
0.092
MgO
%
0.12
K2O
%
0.19
Na2O
%
0.31
2
Physical Properties
Cold Crushing Strength
Mpa
75
Bulk Density
g/cm3
2.76
Refractoriness
0C
1790
Refractoriness under load
0C (0.2Mpa)
1510
Apparent Porosity
%
22
PLC (1500   0Cx2h)
%
+1.0 ~ 0.4

 

   

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Andalusite Brick
It has excellent hot properties, resistance to alkalis and thermal shock. For use in iron and steel, incineration, reheat furnaces, kiln furniture, and other applications where the benefits of Andalusite are required.

Technical Specification


 
Chemical Composition (%)
SiO2
%
40.6
A12O3
%
57.3
Fe2O3
%
1.1
TiO2
%
0.3
CaO
%
0.2
MgO
%
0.2
K2O + Na2O
%
0.3
2
Physical Properties
PCE Orton Cone
+34
Apparent Porosity
%
15.3
Bulk Density
g/cm3
2.49 (min)
Apparent Specific Gravity
2.94
Cold Crushing Strength
Mpa
55
Thermal Conductivity @ 10000C
W/mK
1.3
Spalling Resistance
Good
High Temp. Creep 14000C / 0.2Mpa
Deformation: 25-50 hours
%
0.08
PLC 2hrs @ 16000C
%
0.0
Modulus of Rupture @ Room Temp.
Mpa
10.0
Thermal Expansion 20-10000C
%
0.5

 

 
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Mullite Brick  

There are two types of Mullite brick, sintered and fused.

A Mullite brick normally has an alumina content of around 70% with low iron content.  Mullite bricks have excellent thermal shock resistance up to high temperatures, with characteristics of good strength, and demonstrating excellent stability in service.

 

 
 
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