Study on the effect of sintering system on the properties of coal gangue foamed ceramics
DAI Chenyang
JI Ying
ZHU Gang
WANG Ruiqi
LI Enrao
SHA Qianqian
Abstract：To achieve high value-added resource utilization of solid waste,based on the determined formula as m(coal gangue)∶m(steel slag)∶m(potassium feldspar)∶m(talc)=50∶30∶10∶10 mixed with 0.1％SiC,the effect of sintering system on the phase composi-tion,apparent morphology,physical properties and microscopic morphology of foamed ceramic were investigated.The results show that the sintering temperature affects the liquid phase at high temperature and thus affects the stomatal structure and physical properties of foaming ceramics.The heating rate affects the rate of liquid phase formation at high temperature.The soaking time not only af-fects the liquid phase volume at high temperature,but also affects the gas volume.Sintering system is heating from 1150℃(liquid phase)at 2℃/min to 1170 ℃ for 60 min.Foamed ceramic samples prepared under this sintering system have the best performance,because of the matching of the liquid phase generation rate and the SiC decomposition rate.The bulk density of the sample at this time is 0.53 g/cm3,the bending strength is 5.32 MPa,the water absorption rate is 6.43％,the total porosity is 77.92％,and the closed porosity is 74.51％.
Keywords：coal ganguesteel slagfoamed ceramicsintering systemphysical property
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 13-19,31 )