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Dissolution of iron components in basalt fiber
| Number | Dissolution ratio (%) | Total iron content (mg) | Ferrous iron content (mg) |
|---|---|---|---|
| BFSL-Y-01 | 1.72 | 7.3112 | 1.0875 |
| BFSL-Y-02 | 1.59 | 7.3268 | 0.9458 |
| BFSL-Y-03 | 1.67 | 7.3034 | 0.9551 |
| Average value | 1.66 | 7.3138 | 0.9961 |
| R 2 | 2.38% | 0.02% | 7.99% |
Acid etching experimental scheme of iron components in basalt fiber
| Leaching time (h) | Sulfuric acid concentration (mol/L) | Temperature (°C) | Liquid–solid ratio (mL/g) | |
|---|---|---|---|---|
| Scheme1 | 2, 4, 6, 8, 10 | 1 | 80 | 20:1 |
| Scheme2 | 4 | 1, 2, 3, 4, 5 | 80 | 20:1 |
| Scheme3 | 4 | 1 | 50, 60, 70, 90, 100 | 20:1 |
| Scheme4 | 4 | 1 | 90 | 10:1, 15:1, 20:1, 25:1, 30:1 |
Main chemical composition of basalt fiber
| Composition | SiO2 | CaO | Al2O3 | Fe2O3 | MgO | TiO2 | Na2O | K2O |
|---|---|---|---|---|---|---|---|---|
| Content/% | 50.63 | 9.32 | 14.38 | 11.20 | 8.32 | 1.33 | 3.74 | 0.61 |