Effect of Firing Process on Performance of Granite-Based Lightweight Thermal Insulation Materials

Abstract

Abstract: Granite waste, clay and feldspar as the main raw materials were used to make granite-based lightweight thermal insulation materials. The effects of different firing process factors (firing temperature, holding time, heating rate) on the performance of the thermal insulation material were investigated. The high-performance thermal insulation materials with low apparent density, high compressive strength and low thermal conductivity at room temperature were prepared at optimal firing process. The results show that the optimal firing process is rising from room temperatureto 1 000 ℃ at 5 ℃/min, and then to 1 200 ℃ at 3 ℃/min for 30 min. The apparent density, the compressive strength at room temperature, and the thermal conductivity at room temperature of the thermal insulation material prepared at optimal firing process is 0.6 g/cm³, 18.11 MPa and 0.2 W/(m·K), respectively. The overall performance is the best.

Key words: granite waste, lightweight thermal insulation material, apparent density, thermal conductivity, firing temperature, holding time, heating rate

CLC Number:

TQ175.7

PAN Mengbo, LI Xiang, QI Wenhao, DU Haoran, WU Xiaopeng, ZHAO Fei, MA Chengliang. Effect of Firing Process on Performance of Granite-Based Lightweight Thermal Insulation Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3226-3231.

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