Preparation of New Lightweight Ceramic Bricks Based on Silt and Carbide Slag
In order to realize the efficient resource utilization of silt and carbide slag,the optimal process for preparing lightweight ceramic bricks was explored by using silt and carbide slag as the main raw materials and compressive strength as the main index.The effects of raw material mix ratio,calcination temperature and holding time on the compressive strength of lightweight ceramic bricks were discussed by single factor experiment,and the optimum experimental conditions were obtained.The reaction process and mechanism of preparing lightweight ceramic bricks were studied by means of X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)and scanning electron microscopy(SEM).The results show that when the content of silt is 90％(mass fraction),the content of carbide slag is 10％(mass fraction),the calcination temperature is 1 100 ℃,the holding time is 40 min,and the heating rate is 4 ℃/min,the prepared lightweight ceramic bricks have the best performance.The compressive strength can reach 25.94 MPa,while taking into account the low density characteristics of lightweight ceramic bricks.Halloysite is converted into quartz during the heating process.Quartz can promote the raw material to become liquid phase under high temperature conditions,which is the reason why the product is densified.This study provides a new idea for the comprehensive utilization of two kinds of bulk solid waste,which is beneficial to reduce the harm of solid waste storage to the environment and the dependence on natural resources in the preparation process of traditional ceramic bricks.
siltcarbide slagceramic brickcalcinationcompressive strengthvolume density
国家科技期刊平台
NSTL
万方数据
