Affiliation:
1. Karadeniz Teknik University, Department of Mining Engineering
2. Ataturk University, Department of Metallurgy and Materials Engineering
3. Gumushane University, Department of Mining and Mine Extraction
Abstract
Cemented paste backfill (CPB) is an engineering mixture of mine tailings, cement and water. Tailings can commonly contain sulphidic minerals. In this case, acid mine drainage (AMD) may occur due to the oxidation of sulphidic minerals present in the body of the CPB. In general, AMD lowers the pH of the medium and water environment and may cause heavy metal release. Therefore, AMD potential is an important parameter to be considered with regard to environmental aspect. Static tests are widely used to determine the AMD potential of sulphidic materials. When neutralization capacity is higher than the acid generation potential, tailings can be safely stored from an environmental point of view. In this study, AMD potential of CPB material produced from sulfur-containing fine tailings is investigated. In this scope, a static modified ABA test was performed on fine sulphidic tailings (TA) and CPB produced from the same sulphidic tailings+7%wt. SR5 cement+water for the first time. Findings suggests that the CPB material had a lower AMD potential (~10%) compared to the tailings. Acid generation capacity of both tailings and the CPB was found to be dominant due to the high sulphide content (~30%wt. and ~28%wt.), respectively. However, CPB was observed to maintain its structural integrity and did not release acidic water for at least 40 weeks. This study showed that a well-designed CPB can be effectively used as an environmentally friendly mine tailings management method.
Reference14 articles.
1. [1] European Commission, Reference document on best available techniques for management of tailings and waste-rock in mining activities, (2009) pp.427�435.
2. [2] Ercikdi B., Kesimal A., Cihangir F., Deveci H., Alp I., Cemented paste backfill of sulphide-rich tailings: Importance of binder type and dosage�, Cement & Concrete Composites, vol.31/issue 4, pp 268-274, 2009.
3. [3] Chen Q., Tao Y., Zhang Q., Qi C., The rheological, mechanical and heavy metal leaching properties of cemented paste backfill under the influence of anionic polyacrylamide, Chemosphere, 286 Part 1, 131630, 2022.
4. [4] Qi C., Chen Q., Fourie A., Zhang Q., An intelligent modelling framework for mechanical properties of cemented paste backfill, Minerals Engineering, vol.123, pp 16- 27, 2018.
5. [5] Cihangir F., Ercikdi B., Kesimal A., Turan A., Deveci H., Utilisation of alkaliactivated blast furnace slag in paste backfill of high-sulphide mill tailings: Effect of binder type and dosage, Minerals Engineering, vol.30, pp 33-43, 2012.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献