The product features: It is made from a special grade of bauxite, mullite, flint clay, andalusite as main raw material,added with soft clay as binder, shaped by high pressure and sintered at high temperature. The main mineral constituent is mullite phase, with excell thermal shock stability, good washing-out resistance, steel non-stick,low porosity and chemical erosion resistance, it is mainly used in steel and special steel casting.
Casting Steel Refractory Bricks
| Items |
MJGZ-60 |
JGZ-80 |
JGZ-70 |
JGZ-60 |
JGZ-40 |
| Al2O3 % ≥ |
60 |
80 |
70 |
60 |
40 |
| Fe2O3% ≤ |
1.5 |
1.5 |
1.5 |
1.5 |
1.8 |
| Apparent porosity % ≤ |
22 |
23 |
25 |
26 |
24 |
| Bulk density g/cm³ ≥ |
2.25 |
2.6 |
2.5 |
2.3 |
2.1 |
| Cold crushing strength Mpa ≥ |
35 |
50 |
55 |
70 |
80 |
| P.L.C % 1400ºC×2h |
±0.2 |
±0.2 |
±0.2 |
±0.2 |
±0.4 |
| Thermal shock resistance water Cycle water cooling-cycle 1100ºC |
30 |
15 |
15 |
20 |
15 |
Audited Supplier 
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