High Alumina Insulation Refractory Brick

July 16, 2018
High alumina insulation refractory brick is the insulation product made of bauxite as the main raw material and has Al2O3 content not less than 48%. The brick produced by Jundao (Henan) New Materials Co.,Ltd. Is mainly using bauxite clinker, combined with clay as raw material, mixed with adhesive, in order to improve product performance, added in industrial alumina, corundum, sillimanite, kyanite, silica fine powder, which can produce product with bulk density more than 0.4 g/cm3.Different Al2O3 content and bulk density, the highest working temp will be different, usually 1250~1350℃,some can reach 1550℃.
 
High alumina insulation refractory brick is used for casting insulation layer and non-strong high-temp melt erosion and crushing parts, if the brick contacts flame directly, usually the surface contact temp could not higher than 1350℃. Mullite insulation refractory brick can contact flame directly which has characters of high-temp resistance, high strength and significant energy saving etc. It can be used in hot blast stove, electric furnace lining. Corundum-Mullite insulation refractory brick with Al2O3 content 82% can be used furnace lining under the temp 1550℃.
 

Item

Index

Brand

LG140-1.2

LG140-1.0

LG140-0.8L

LG135-0.7L

LG135-0.6L

LG125-0.5L

Al2O3%      ≥

48

Fe2O3%      ≤

2.0

Bulk density  g/cm3    ≥

1.2

1.0

0.8

0.7

0.6

0.5

Cold crushing strength   MPa   ≥

4.5

3.5

2.5

2.2

1.6

1.2

Thermal conductivity(350±25)℃ W/m.k   ≤

0.55

0.50

0.35

0.30

0..25

0..20

Permanent linear change≤2% testing temp ℃

1400

1350

1250

 

 

 

 

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