添加剂对铜渣还原尾渣微晶玻璃析晶行为及性能的影响

摘要/Abstract

摘要： 铜渣还原尾渣与CaO-Al₂O₃-SiO₂系微晶玻璃的化学组成相似,采用熔融法以铜渣还原尾渣为主要原料制备微晶玻璃可为铜渣的高效利用提供一种有效途径。通过DSC、XRD和SEM-EDS等技术研究了不同添加剂(B₂O₃、CaF₂、TiO₂和Cr₂O₃)对微晶玻璃物相组成、抗折强度、体密度、吸水率和显气孔率等性能的影响。结果表明:无论添加哪种添加剂,微晶玻璃均能析出力学性能较好的钙长石和钙铝黄长石,且能使晶体析晶方式转化为整体析晶;添加B₂O₃可使微晶玻璃性能最优,其次是TiO₂与CaF₂。

关键词: 微晶玻璃, 添加剂, 铜渣还原尾渣, 析晶行为, 抗折强度, 体密度, 吸水率, 显气孔率

Abstract: The chemical composition of copper slag reduction tailings is similar to that of CaO-Al₂O₃-SiO₂ glass-ceramics. The preparation of glass-ceramics with copper slag reduction tailings as the main raw material by melting method provides an effective way for the efficient utilization of copper slag. The effects of different additives (B₂O₃, CaF₂, TiO₂ and Cr₂O₃) on the phase composition, flexural strength, bulk density, water absorption and apparent porosity of glass-ceramics were studied by DSC, XRD and SEM-EDS. The experimental results show that no matter which additive is added, the glass-ceramics precipitate anorthite and gehlenite with good mechanical properties, and the crystal crystallization mode transforms into overall crystallization. Adding B₂O₃ makes the best performance of glass-ceramics, followed by TiO₂ and CaF₂.

Key words: glass-ceramics, additive, copper slag reduction tailing, crystallization behavior, flexural strength, bulk density, water absorption, apparent porosity

中图分类号:

TF09

罗彦恒, 马国军, 李志, 郑顶立, 张翔, 朱俊霖. 添加剂对铜渣还原尾渣微晶玻璃析晶行为及性能的影响[J]. 硅酸盐通报, 2022, 41(11): 3852-3860.

LUO Yanheng, MA Guojun, LI Zhi, ZHENG Dingli, ZHANG Xiang, ZHU Junlin. Effects of Additives on Crystallization Behavior and Properties of Glass-Ceramics from Copper Slag Reduction Tailings[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(11): 3852-3860.

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