金矿尾砂微晶玻璃的制备

摘要

对以金矿尾砂为主要原料制造微晶玻璃进行了研究。 根据微晶玻璃的基础组成， 选择MgO-Al2O3-SiO2系统为配方依据， 从最低共熔点、 晶相组成和晶格匹配确定玻璃主成分并优选晶核剂； 利用DTA， XRD， SEM等测试手段， 研究组成及晶化工艺对析晶性能和物化行为的影响。 结果表明： 在金矿尾矿中添加适量的镁、 铝质材料和网络结构调整氧化物， 可获得主晶相为堇青石和尖晶石及顽火辉石固溶体的性能良好的微晶玻璃。%The preparation of glass-ceramics by utilizing the Wulong gold tailings as the main raw material was studied. According to chemical composition of the glass-ceramics， the formula for glass mixture and the nucleating agent were selected among MgO-Al2O3-SiO2 system from lattice constant， low melting-point and forming technology. The effects of glass composition and crystallization technology on crystallization properties of MgO-Al2O3-SiO2 system glass-ceramics were studied by means of DTA， XRD， polarizing microscope and SEM. The results show that glass-ceramics with good properties can be obtained, when some magnesia and aluminous raw materials and glass-network adjustment oxides are added. The predominant crystal phases of glass-ceramics are cordierite， spinel and enstatite.