Lightweight, good heat insulation, stable at high temperatures, resistant to acidic slag and gases. Used in insulation layers of glass melting furnaces, annealing kilns, metallurgical reheating furnaces, and ceramic kilns.
Lightweight silica bricks are lightweight refractory materials mainly made from silica - based raw materials through a foaming process. Their main mineral phases are tridymite and cristobalite. With a uniform pore structure, they combine heat - insulation and fire - resistance properties.
Features and Properties
| Index Items | QGZ - 0.8 | QGZ - 1.0 | QGZ - 1.2 |
| SiO2 Content (%) | 91 | 91 | 91 |
| Al₂O₃ Content (%) | ≤ 1.0 | ≤ 1.0 | ≤ 1.0 |
| Fe₂O₃ Content (%) | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 |
| Bulk Density (g/cm³) | ≤ 0.8 | ≤ 1.0 | ≤ 1.2 |
| Compressive Strength at Normal Temperature (MPa) | ≥ 2.0 | ≥ 3.0 | ≥ 4.0 |
| Initial Softening Temperature under Load (°C) | ≥ 1600 | ≥ 1620 | ≥ 1640 |
| Thermal Conductivity (W/(m·K), 350 ± 25 °C) | ≤ 0.26 | ≤ 0.30 | ≤ 0.35 |
Al₂O₃:90-99%;
Bulk Density:1.35-1.70g/cm³;
Cold Crushing Strength:8-20MPa;
Al₂O₃:40-70%;
Bulk Density:0.60-1.10g/cm³;
Thermal Conductivity:0.20-0.60;
Al₂O₃:≥48%;
Bulk Density:0.6-1.2g/cm³;
Thermal Conductivity :0.25-0.50;
Bulk Density:0.6-1.3g/cm³;
Thermal Conductivity:0.25-0.55;
Cold Crushing Strength:1.5-8MPa;
WhatsApp
WeChat
WhatsApp ID: +86 190 5961 2888
WeChat ID: +86 190 5961 2888
