Jundao (Henan) New Materials Co.,Ltd.
Jundao（Henan）New Materials Co.,Ltd.
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Electric furnace cover prefabricated blocks High strength Precast Refractory Shapes
The electric furnace cover prefabricated block are developed to extend the service life of the electric furnace top, mainly including high aluminum, corundum, chrome corundum, mullite,etc.
Electric furnace cover prefabricated block features:
High temperature resistance, corrosion resistance, no peeling, high refractoriness under load.
Convenient construction and easy installation.
The high-power electric furnace triangle area is made of high-alumina, mullite, corundum, and ultra-high power is made of chrome corundum and corundum.
| Item | DL-1 | DL-2 | |
| Al2O3(%)≥ | 80 | 85 | |
| Cr2O3(%)≥ | 1.5 | 2.0 | |
| Bulk density(g/㎝³)≥ | 110℃×24h | 2.9 | 2.9 |
| 1000℃×3h | 2.85 | 2.85 | |
| 1500℃×3h | 2.85 | 2.85 | |
| Cold bending strength (MPa)≥ | 110℃×24h | 6 | 6 |
| 1000℃×3h | 8 | 10 | |
| 1500℃×3h | 15 | 15 | |
| Cold crushing strength (MPa)≥ | 110℃×24h | 30 | 40 |
| 1000℃×3h | 50 | 60 | |
| 1500℃×3h | 60 | 65 | |
