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Advances in Materials Science and Engineering
Volume 2015, Article ID 352567, 7 pages
http://dx.doi.org/10.1155/2015/352567
Research Article

Preparation of Cementitious Material Using Smelting Slag and Tailings and the Solidification and Leaching of Pb2+

1School of Engineering Technology, China University of Geosciences, Beijing 100083, China
2Beijing General Research Institute of Mining & Metallurgy, Beijing 110160, China
3School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China

Received 11 July 2014; Accepted 16 September 2014

Academic Editor: Zhaohui Li

Copyright © 2015 Dan Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The composite cementitious materials were prepared with lead-zinc tailings, lead-zinc smelting slag, and cement clinker. The effect of material ratio on the mechanical properties, the phase analysis, and microstructures were investigated. The effect of the pH and stripping time on the leaching amount of lead ion was discussed. The results show that the additive amount of the tailings should be minimized for the cementitious materials meeting the strength requirements, controlled within 10%. The leaching amount of cementitious materials remains low in a larger range of pH, which can effectively reduce the leaching of heavy metal lead. The leaching kinetics of lead ions in the three kinds of samples could be better described by the pseudo-second-model.