Description
Fused rebonded magnesia-chrome brick is generally made by first melting lightly burned magnesia and chromite in an electric arc furnace to produce fused magnesia-chrome sand. Then this sand is crushed, ground, proportioned, shaped and sintered to manufacture the final product. These bricks have a high degree of direct bonding, low impurity content, resulting excellent high-temperature strength, superior high-temperature volume stability, as well as outstanding corrosion and erosion resistance.
Specifications
| Item | Grade | ||||||||
| DMGe-26 | DMGe-24 | DMGe-22 | DMGe-20A | DMGe-20B | DMGe-16A | DMGe-16B | DMGe-12A | DMGe-12A | |
| ω(MgO) / % | ≥ 50 | ≥ 50 | ≥ 55 | ≥ 58 | ≥ 58 | ≥ 62 | ≥ 58 | ≥ 68 | ≥ 65 |
| ω(Cr2O3) / % | ≥ 26 | ≥ 24 | ≥ 22 | ≥ 20 | ≥ 20 | ≥ 16 | ≥ 16 | ≥ 12 | ≥ 12 |
| ω(SiO₂) / % | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 2.0 | ≤ 1.5 | ≤ 2.0 | ≤ 1.5 | ≤ 2.0 |
| Open Porosity / % | ≤ 16（15） | ≤ 16（15） | ≤ 16（15） | ≤ 16（15） | ≤ 17（15） | ≤ 16（15） | ≤ 17（16） | ≤ 16（15） | ≤ 17（16） |
| CCS / MPa | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) | ≥ 40(45) |
| min35(40) | min35(40) | min35(40) | min35(40) | min35(40) | min35(40) | min35(40) | min35(40) | min35(40) | |
| R.U.L / 0.2 MPa T0.6/℃ | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 |
Applications
Widely used in the slag line areas of non-ferrous metallurgical furnaces;
Used in the tuyere zone of heavy non-ferrous metal converters;
Used in critical areas of flash furnaces, side-blown furnaces, and Isasmelt furnaces;
Used in the high-temperature zone of basic refractory kilns;
Used in steel-making RH furnaces,etc.
