High alumina bauxite is used as the main raw material, clinker is sorted by grading and sieved to remove iron, and is prepared by high temperature firing.
Features: high refractoriness, strong resistance to acid and alkali slag, high temperature strength
Application: masonry blast furnace, hot blast stove, electric furnace top and ladle permanent lining
Main physical and chemical performance index:
|
Index |
LZ-75 |
LZ-65 |
LZ-55 |
LZ-48 |
|
Al2O3 % ≥ |
75 |
65 |
55 |
48 |
|
Refractoriness ℃ ≥ |
1790 |
1790 |
1770 |
1750 |
|
Refractoriness under load (0.6%) ℃ ≥ |
1520 |
1500 |
1470 |
1420 |
|
Permanent linear change (1500℃×2h) % |
+0.1~-0.4 |
+0.1~-0.4 |
+0.1~-0.4 |
+0.1~-0.4 (1450℃) |
|
Apparent porosity % |
23 |
23 |
22 |
22 |
|
CCS MPa ≥ |
53.9 |
49.0 |
44.1 |
39.2 |
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