Water glass expanded perlite products processing technology The quality requirements for raw materials used in the production of cullet expanded perlite products are as follows.
Expanded perlite: The bulk density is ≤120kg/m3. Water glass: modulus 2.4 to 3, density 1.38 to 1.42 g/m3, concentration 38 to 42 ° Bé (pome). Red mud: aluminum industrial waste, chemical composition SiO2>22%, Al2O3<6%, Fe2O3>8%, CaO<48%, H2O<3%. Typical formulations for the production of fire-resistant glass expanded perlite products are shown in the table below. Fireproof water glass expanded perlite products typical formula
| material | Compression ratio /% | Mass ratio /% | Product quality index 1 | Remarks |
| Expanded perlite | 1.8 | 43.6 | Dry bulk density 240～300kg/m 3 ; pressure 0.6~1.7MPa; normal temperature thermal conductivity 0.047～0.08W/(m·K); high temperature thermal conductivity 0.071～0.115W/(m·K) | The mass ratio of cement to expanded perlite is (1 ~ 1.3): (0.4 ~ 1); the amount of coagulant (sodium fluorosilicate) is 10% ~ 14% of the amount of water glass |
| Water glass | 1.8 | 54.6 | ||
| Red mud | 1.8 |
1 The maximum operating temperature is 600 to 650 °C. The production process is as follows:
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