利用铅锌尾矿和CRT玻璃固体废弃物协同制备微晶玻璃工艺

以铅锌尾矿和CRT玻璃固体废弃物为主要原料,采用烧结法制备微晶玻璃材料.为确定基础玻璃的成分,以及尾矿、CRT玻璃及各化工原料的用料比例,设计了正交实验;研究了CaO,Al2O3,MgO等氧化物添加量对微晶玻璃结构及性能的影响规律.通过差热分析（DTA）、X射线衍射（XRD）、扫描电镜（SEM）等分析方法,考察了微晶玻璃产品的晶相、晶体形貌特征及性能.结果表明：利用铅锌尾矿、CRT玻璃废弃物制备微晶玻璃的最佳配方为：尾矿20％、CRT玻璃30％、添加辅料石英砂29.7％、方解石25％、Al2O3 12％、晶核剂TiO2 1％.SEM和XRD分析可知,微晶玻璃的主晶相为透辉石;打磨抛光处理后,平均显微硬度为8.76 GPa,平均抗折强度为223.1MPa;经酸、碱浸蚀后,质量变化分别为0.43％和0.58％,耐酸碱腐蚀性良好.

Preparation of the glass-ceramics by using lead-zinc tailings and cathode ray tube glass solid wastes

The glass-ceramics was prepared by sintering method with lead-zinc tailings and cathode ray tube （CRT） glass industrious solid wastes as the main materials. Orthogonal experiment was carried out to confirm the best ratio of Lead-Zinc tailings, CRT glass and other chemical materials in basic-glass. Effect of the contents of CaO, AI203 and MgO on the glass-ceramics structure and performance was analyzed. The crystalline phase, crystal morphology and performance of the glass-ceramics were characterized by means of DTA, XRD and SEM etc, The results showed that the best proportion method was： Lead-Zinc tailings 20%, CRT glass 30%, quartz 29.7%, calcite 25%, AI203 12% and nucleating TiO2 1%. The main crystalline phase of the glass-ceramics sample was dropsied. The optimized samples possessed good microhardness and breaking strength （8.76 GPa and 223.1 MPa respectively）. It also had good corrosion resistance, and the changes of quality were 0.43% and 0.58% respectively after acid-alkali etchinq.