Shahrood University of Technology Journal of Mining and Environment 2251-8592 12 4 2021 10 01 Characterization of Leaching Feed and Residue of Mechanically Activated Sphalerite 1029 1040 2273 10.22044/jme.2021.11054.2082 EN R. Aram Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran M. Abdollahi Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran P. Pourghahramani Mining Engineering Faculty, Sahand University of Technology, Tabriz, Iran M. Mohseni Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran A. Khodadadi Darban Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran Journal Article 2021 08 01 In this research work, the solubility of sphalerite concentrate due to mechanical activation in planetary ball mill in both the wet and dry modes is investigated, and the parameters of mean particle size, BET specific surface area, SEM, and XRD are analyzed. The results of the particle size analysis and BET specific surface area show that the size of particles for the non-activated sample decrease from 51 to 30 microns but the BET specific surface area increase from 0.17 m²/g to 1.03 m²/g for the residue and feed samples. In the wet and dry mode mechanical activation, the mean particle size and BET specific surface area in the residue samples are reduced relative to the leaching feed. The results of the micro-structure characterization also show that the amorphization of the residue compared to the leaching feed increases in both modes of mechanical activation. The crystallite size and lattice strain of the activated samples in the residue increase and decrease compared to the leaching feed, respectively. https://jme.shahroodut.ac.ir/article_2273_2c50574bdab48849edee2183fbcfce00.pdf