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Corundum castable
index | High purity corundum | High strength corundum | Alumina Bubble | High purity Al-Cr | |||
GJ-1 | GJ-2 | GJ-3 | GQJ | GGJ | |||
Chemical composition(%) | AL2O3 | ≥95 | ≥90 | ≥93 | ≥95 | ≥95 | |
SiO2 | ≤0.4 | ≤0.4 | ≤0.5 | ≤1 | Cr2O32-5 | ||
Max working temp.(℃) | 1800 | 1800 | 1700 | 1800 | 1900 | ||
Bulk density after burn (g/cm3) |
≥3.1 | ≥3.0 | ≥2.9 | ≥1.3 | ≥3.0 | ||
Linear change rate after burn %(1500℃×3h) |
±0.5 | (1100℃)0.1-0.3 | (1500℃) ±0.5 | (1500℃) ±0.5 | -0.4-0.7 | ||
Rupture strength (MPa) |
110℃×24h | ≥60/≥9 | ≥60/≥8 | ≥40/≥7 | ≥8/≥3 | ≥25/≥5 | |
1100℃×3h | ≥80/≥10 | ≥70/≥9 | ≥80/≥15 | ≥15/≥4 | -- | ||
1500℃×3h | ≥100/≥15 | ≥100/≥10 | -- | ≥15/≥6 | ≥85/≥16 | ||
Max aggregate size(mm) |
5-6 | 3 | 3 | 5 | 5-6 | ||
Water dosage(%) | 5-6 | 5-6 | 6.5-7.5 | 9-12 | 5-6 | ||
Application |
Carbon reactor, Rh vacuum refining equipment. |
Petroleum industry, chemical fertilizer industry kiln - resistant non-reducible place |
Oil catalytic cracking unit cyclone - resistant lining. |
Single layer insulation lining |
Hard carbon black reactor. |