关键词: 石英质玉尾矿;微晶玻璃;直接烧结法;酸预处理

Abstract: Glass-ceramic was prepared with dismantled cathode ray tubes(CRT)and HF-pretreated jade tailing which contains large amounts of Quartz.The thermal effects, crystalline phases and microstructures of tailings and glass-ceramics were investigated by comprehensive thermal analysis (DSC), X-ray fluorescence(XRF), X-ray diffraction analysis(XRD)and field emission scanning electron microscope(FE-SEM).Results show that the sintering activity of quartz jade tailings could be improved by HF pretreatment.With the increase of HF concentration, the sintering activity of quartzose jade tailings is first increased and then decreased.The sample shows the highest sintering activity treated by 8%HF(S8)for 4 h.The major crystalline phases of S8 are plate-like sanidine and albite.In addition, the diopside phase with dendritic grains is also formed.

Key words: quartzose jade tailings;glass-ceramic;direct sintering;HF pretreatment