以金矿尾砂为主要原料,方解石、硼砂等为添加原料,采用熔融法制备CaO-Al2O3-SiO2系微晶玻璃.采用X射线衍射分析(XRD)、差热分析(DSC)、扫描电镜(SEM)等分析手段对所制备样品进行性能测试与结构表征,研究了TiO2和Cr2O3对金矿尾砂微晶玻璃结晶性能的影响.结果表明,以2% TiO2为晶核剂,金矿尾砂微晶玻璃只有表面析晶,晶相从表面向内部生长;以4% TiO2为晶核剂,样品内部析出少量团聚晶体;以2% Cr2O3为晶核剂,样品内部析出少量团聚粒状晶体;以2% TiO2和2% Cr2O3为复合晶核剂,样品内部析出大量均匀分布的颗粒状晶体,极大地提高了金矿尾砂微晶玻璃的整体析晶能力,主晶相为透辉石(CaMgSi2O6),次晶相为钙长石(CaAl2Si2O8).
参考文献
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