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- W4289516271 abstract "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 ∼ 6.5 μm 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." @default.
- W4289516271 created "2022-08-03" @default.
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- W4289516271 date "2022-09-01" @default.
- W4289516271 modified "2023-10-17" @default.
- W4289516271 title "Grinding kinetics of lead–zinc tailing powders and its optimal particle size as a pozzolanic admixture in cement mortar" @default.
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- W4289516271 doi "https://doi.org/10.1016/j.apt.2022.103730" @default.
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