Acid-resistant castables are refractory materials mainly used in industrial furnaces and other equipment exposed to acid environments. They are composed of acid-resistant aggregates, binders and additives, possessing excellent acid resistance, high temperature resistance and mechanical strength.
| Artikel/Güteklasse | NS-1.6 | NS-1.8 | NS-2.0 |
|---|---|---|---|
| ω (SiO2) ≥/% | 45 | 48 | 52 |
| Schüttdichte ≥/ (g/cm³) | 1.6 | 1.8 | 2 |
| Kaltstauchfestigkeit ≥/MPa | 5 | 8 | 10 |
| Säurebeständigkeit ≥/% | 95 | 95 | 95 |
| Wärmeleitfähigkeitskoeffizient ≤ /[W/(m-K)] (350±25℃) | 0.5 | 0.55 | 0.6 |
| Betriebstemperatur/℃ | 800 | 900 | 1000 |
1.Excellent acid resistance; 2.High temperature resistance; 3.Good mechanical strength and strong adhesion; 4.Environmental protection; 5.Lower price.
Acid – resistant castables are widely used in chemical plants for reaction vessels and acid – pickling tanks, in sulfuric acid production facilities, and in waste incineration plants to resist acid corrosion.