Research Article
Submicron SiO2 Powder: Characterization and Effects on Properties of Cement-Free Iron Ditch Castables
Table 2
Formulations for the experiment.
| | Materials and content (wt)/(%) | Particle size range | A | B | C | D | E | F | G |
| | Tabular alumina | 0.1–8 mm | 60 | 60 | 60 | 60 | 60 | 60 | 60 | | SiC | 0.5–1 mm | 18 | 18 | 18 | 18 | 18 | 18 | 18 | | Spherical asphalt | 0.1–1 mm | 3 | 3 | 3 | 3 | 3 | 3 | 3 | | Water-reducing agent | — | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | | Metal silicon | ≤0.05 mm | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | | Submicron SiO2 powder | D90 = 0.454 μm | 3 | 4 | 5 | 6 | 7 | 8 | 9 | | Dense corundum powder | ≤0.06 mm | 14.4 | 13.4 | 12.4 | 11.4 | 10.4 | 9.4 | 8.4 | | Water addition (flow value = 170 mm) | — | 4.6 | 4.0 | 3.6 | 3.4 | 3.3 | 3.2 | 3.2 |
|
|
