标题: Grinding kinetics of lead-zinc tailing powders and its optimal particle size as a pozzolanic admixture in cement mortar
作者: Wang, HJ (Wang, Haojie); Ju, CX (Ju, Chenxuan); Zhou, M (Zhou, Min); Zheng, F (Zheng, Fan); Dong, YQ (Dong, Yiqie); Hou, HB (Hou, Haobo); Liu, SH (Liu, Shuhua)
来源出版物: ADVANCED POWDER TECHNOLOGY 卷: 33 期: 9 文献号: 103730 DOI: 10.1016/j.apt.2022.103730 出版年: SEP 2022
摘要: Recycling lead-zinc tailing powders (LZTPs) as pozzolanic admixtures can effectively solve its stockpiling and hazards problems synchronously, and mechanical grinding can increase the recycling utilization quantity and efficiency of LZTPs. Based on the laser particle size distribution (PSD) and activity index test results, the grinding kinetics, Rosin-Rammler-Bennet (RRB), Swebrec distribution model, and fractal theory of LZTPs have been studied. The results show that the grinding process of LZTPs is described quantitatively in the Divas-Alyaviden grinding kinetics equation, and the grinding efficiency of LZTPs becomes negligible after grinding for 120 min. Moreover, the PSD of LZTPs was remarkably consistent with the RRB, Swebrec distribution model, and fractal theory. The activity index increases with the grinding time. The gray correlational analysis revealed that a particle size range of 3.3 similar to 6.5 mu m presented a maximal positive effect on the activity index. In addition, the leaching toxicity of Pb, Cr, and Cd of LZTPs cement mortar block is below the standard limit of TCLP 1211 and it is safe to use the mortar with the addition of 30% LZTPs. The optimal grinding time for LZTPs was 90 min taking into account the economic and technical benefits. (C) 2022 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
作者关键词: Lead-zinc tailing powders; Grinding kinetics; Gray correlational analysis; Particle size distribution; Pozzolanic admixture; Activity index
地址: [Wang, Haojie; Ju, Chenxuan; Zhou, Min; Zheng, Fan; Dong, Yiqie; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
[Zhou, Min; Hou, Haobo] Hubei Environm Remediat Mat Engn Technol Res Ctr, Wuhan 430072, Peoples R China.
[Liu, Shuhua] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.
通讯作者地址: Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
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