Wear-resistant refractory castables are made of high-alumina bauxite clinker, corundum and silicon carbide and other wear-resistant raw materials, with aluminate cement as binder and external additives. An excellent refractory castable, a material that is formed by casting or vibration.
Wear-resistant refractory castables are classified according to rationalization performance: NMJ-I, NMJ-II.N, M, and J represent the three words of resistance, grinding and pouring.
|
Project |
Corundum (silicon carbide) wear-resistant refractory castable |
|
Index |
NMJ-I |
NMJ-II |
|
Bulk density（110℃±5℃X24h） |
Kg/m3 |
2900～3100 |
2800～3000 |
|
Drying compressive strength（110℃±5℃X24h） |
MPa |
≥70 |
≥65 |
|
Compressive strength after burning（1200℃X3h） |
MPa |
≥90 |
≥80 |
|
Drying strength（110℃±5℃X24h） |
MPa |
＞10 |
＞10 |
|
Thermal shock stability（900℃，Water cooling） |
Times |
≥25 |
≥25 |
|
Change rate after burning, heat preservation for 3h, test temperature not greater than ±1% |
℃ |
1300 |
1300 |
|
Refractoriness |
℃ |
≥1770 |
≥1750 |
|
Wear resistance（900℃X6h） |
CC |
＜8 |
＜8 |
|
Chemical Composition SiC Al2O3 |
% |
— |
≥30 |
|
≥75 |
≥50 |
It is suitable for the lining of high temperature parts such as cyclone furnace and coal-fired furnace refractory belt. Wear-resistant refractory castablesare made of high-alumina bauxite clinker, corundum and silicon carbide and other wear-
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