项 目 \ 牌 号 | Burned bricks烧 成 砖 | 不 烧 砖Unburned Bricks | DL-80 | DL-75 | | | DL85P | BDL-80 | BDL-75 | BDL65 | DL80P-B | | Al2O3 % | ≥80
| ≥75
| ≥65
| ≥75
| ≥80
| ≥80
| ≥75
| ≥65
| ≥70
| | Fe2O3 % | | | | ≤1.7
| ≤1.7 | | | | ≤1.7 | | 耐火度 ℃ | | | | | | ≥1780
| ≥1780
| ≥1770
| | 荷重软化温度KD ℃
| ≥1530
| ≥1520
| ≥1520
| | | ≥1530 | ≥1520 | T2≥1470 | | (1500 ℃×2h)重烧线变化率 %
| 0.2～-0.4
| 0.2～-0.4
| 0.2～-0.4
| | | | | | | 显气孔率 %
| 炉顶砖 | ≤19
| ≤19
| ≤19 | ≤18 | ≤19 | ≤18
| ≤18
| ≤19 | ≤19 | | 拱角砖 | ≤21
| ≤21
| | ≤20
| ≤20
| | | 常温耐压强度 Mpa | ≥75 | ≥65 | ≥58.8 | ≥50 | ≥80 | ≥60 | ≥55 | ≥30 | ≥50 | | 热震稳定性,次(1100℃ 水冷) | | | | | | ≥8 | | 用 途 | 炼钢电炉炉盖 |
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