以分析纯试剂为原料模拟含锌冶炼渣, 采用熔融法制备微晶玻璃, 利用X射线衍射、扫描电子显微镜、拉曼光谱等表征方法, 探究不同氧化锌掺杂量对微晶玻璃形成、晶化及理化性能的影响。结果表明, 微晶玻璃的主要结晶相为堇青石相, 少量氧化锌(低于0.5%, 摩尔分数, 下同)的加入能够增强玻璃形成能力。随着氧化锌含量逐渐增加(0.5%~20.0%), 玻璃网络结构的完整性变差, 玻璃的黏度降低, 微晶玻璃的主要结晶相由堇青石转变为尖晶石, 同时结晶度和晶粒尺寸增大, 从而微晶玻璃的体积密度、硬度和耐酸碱性提高。微晶玻璃对重金属锌有较好的固化效果, 因此锌浸出浓度远低于标准值, 浸出率趋于稳定。本研究可为实现微晶玻璃固化重金属提供参考和借鉴。

Using analytical pure reagents as raw materials to simulate zinc-containing smelting slagglass-ceramics were prepared by melting method. X-ray diffractionscanning electron microscopyand Raman spectroscopy were used as characterization methods, and the effect of different zinc oxide content on the formationcrystallizationphysical and chemical properties of glass-ceramics was explored. The results show that the main crystalline phase of glass-ceramics is cordieriteand the addition of a small amount of zinc oxide (less than 0.5%mole fractionsame as below) can enhance the glass-forming ability. As the zinc oxide content gradually increases (0.5%~20.0%)the integrity of glass network structure deterioratesand the viscosity of glass decreases. The main phase of glass-ceramics is transformed from cordierite to spineland the crystallinity and grain size of glass-ceramics increase. Consequentlythe bulk densityhardness and resistance to acid/alkali corrosion of glass-ceramics also increase. Heavy metal zinc has good curability in glass-ceramicsso the leaching concentration of zinc is much lower than the standard valueand leaching rate tends to be stable. This study provides a reference for the solidification of heavy metals through glass-ceramics.