Study on the Process Mineralogical Characteristics of Lianhua Purple Sand Clay from Jiangxi Province
Taking the purple sand clay of the Zishan formation of the Lower Carboniferous in Lianhua county,Jiangxi province as the research object,XRD,SEM,particle size analyzer and other testing methods were used to identify the chemical composition,mineral composition,microstructure,etc.of the Lianhua purple sand clay sample,analyze the process performance,and compare it with A comparative study was conducted on Yixing purple sand clay;the thermal shock resistance and lead and cadmium dissolution of finished purple clay utensils were tested.The results show that the contents of Al2O3,Fe2O3 and flux raw materials of Lianhua purple sand clay are similar to those of Yixing purple clay,but the contents of SiO2 and TiO2 are larger and the loss on ignition is smaller.The mineral composition is mainly quartz,sericite,and pyrophyllite,which is different from Yixing purple sand.However,the minerals of the two types of purple sand are similar after high-temperature calcination.The plasticity,sintering temperature,post-fire shrinkage and post-fire water absorption are similar to those of Yixing purple sand clay,but the particle size is larger.The thermal shock resistance and lead and cadmium dissolution of Lianhua purple clay products meet the current national standards for purple clay pottery.This study provides directions for subsequent development and utilization of mineral resources and comprehensive exploration of Zishan Formation coal mines.
国家科技期刊平台
NSTL
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