Effects of Additives on Crystallization Behavior and Properties of Glass-Ceramics from Copper Slag Reduction Tailings

Abstract

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

CLC Number:

TF09

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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