Evaluation and Research on Static and Dynamic Acid Generation of Waste Rock at Dexing Copper Mine in Different Years

DOI

10.2991/ifeesm-15.2015.171How to use a DOI?

Keywords

acid mine drainage; waste rock; Static evaluation; Dynamic evaluation

Abstract

Waste rock and tailings of a mine generate acid mine drainage due to oxidization during long-term stacking, and this may cause serious harm to the environment. 1-year-old, 5-year-old, 10-year-old and 20-year-old waste rock of Dexing Copper Mine are chosen in the experiment for acid generation research. The static evaluation result shows that the 4 types of waste rock have the acid generating potential, and 3 types (except for 1-year-old waste rock) have generated acid. The 9-month dynamic evaluation result indicates: the pH values of waste rock of 4 different ages show remarkable negative correlation, the detected ions are mainly of fluorides, Cu2+, Zn2+, SO42- and Fe3+. 1-year-old waste rock doesn't generate acid during the entire experiment, the acid generation of 5-year-old and 10-year-old waste rock is stable, but that of 20-year-old waste rock is slow. Thus the acid generation process of waste rock can be inferred as: no acid generation - high-rate acid generation - stable acid generation - lower-rate acid generation.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Qiong Wang
AU  - Yi Liu
AU  - Yuli Han
AU  - Lianbi Zhou
PY  - 2015/09
DA  - 2015/09
TI  - Evaluation and Research on Static and Dynamic Acid Generation of Waste Rock at Dexing Copper Mine in Different Years
BT  - Proceedings of the 2015 International Forum on Energy, Environment Science and Materials
PB  - Atlantis Press
SP  - 931
EP  - 938
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-15.2015.171
DO  - 10.2991/ifeesm-15.2015.171
ID  - Wang2015/09
ER  -