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Blast furnace tuyere combination brick
Numbering
Affiliate classification Plastic phase composite corundum brick
Weight 0
Product Description
Product Overview:
Plastic phase composite corundum brick is a composite refractory product with corundum, silicon carbide, and a binder mixed in a certain ratio, and then pressed and molded at high temperature to produce soft, high strength, strong flexibility, and good slag resistance. Mainly used for masonry blast furnace hearth, furnace bottom lining, calcium carbide furnace door, etc. According to physical and chemical indicators, it is divided into four grades: ZSG-1, ZSG-2, ZSG-3 and ZSG-4.
Physical and chemical indicators：
| Item | Indicator | |||
| ZSG-1 | ZSG-2 | ZSG-3 | ZSG-4 | |
| Al2O3 % ≥ | 80 | 75 | 70 | 78 |
| SiC % | 6～10 | 6～10 | 0～3 | 2～5 |
| Si3N4 % | - | - | 6～10 | 4～8 |
| Fe2O3 % ≤ | 1.0 | 1.0 | 1.0 | 1.0 |
| Bulk Density g/cm³ ≥ | 3.0 | 2.9 | 2.9 | 2.9 |
| Apparent porosity % ≤ | 15 | 16 | 16 | 16 |
| Compressive strength at room temperature Mpa ≥ | 110 | 90 | 100 | 100 |
| Heating permanent line change（1500℃×2h） % | +0.1～-0.2 | +0.1～-0.2 | +0.1～-0.2 | +0.1～-0.2 |
| Load softening start temperature（0.2Mpa，0.6%） ℃ ≥ | 1680 | 1660 | 1680 | 1660 |