Integrated mine tailings management by combining environmental desulphurization and cemented paste backfill:: Application to mine Doyon, Quebec, Canada
Integrated mine tailings management by combining environmental desulphurization and cemented paste backfill:: Application to mine Doyon, Quebec, Canada
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DOI：
10.1016/j.mineng.2007.11.012
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发表时间：
2008-03-01
影响因子：
4.8
通讯作者：
Blier, Annie
中科院分区：
文献类型：
--
作者：
Benzaazoua, Mostafa;Bussiere, Bruno;Blier, Annie
实现最佳的废物管理和场地修复是世界各地采矿业面临的主要挑战之一。本文介绍了如何结合环境脱硫和水泥膏回填技术（CPB）的特殊情况下，Doyon矿，金矿业务位于Abitibi地区，魁北克，加拿大，以改善其硫化物尾矿管理。首先利用实验室浮选试验和在线移动的浮选库优化了环境脱硫工艺。对分离的级分（硫化物精矿和低硫化物尾矿）的产酸潜力进行评估，以证明低硫化物尾矿不产酸。然后使用硫化物精矿生产各种CPB混合物。与活性尾矿一起使用的粘合剂是目前在矿山使用的粘合剂：30%波特兰水泥和70%高炉矿渣的组合，占总干尾矿重量的5%。对固化的CPB样品进行单轴抗压强度测试和可渗透性测试。这项研究的结果表明，就Doyon矿而言，环境脱硫可以产生不产酸的低硫化物尾矿和硫化物精矿。硫化物精矿可用于生产具有足够强度的胶结膏体回填，同时改善其在CPB中的环境行为。(c)2007爱思唯尔有限公司保留所有权利。
Achieving optimal wastes management and site remediation is one of the main challenges facing the mining industry around the world. This paper describes how environmental desulphurization and cemented paste backfill technology (CPB) could be combined in the particular case of the Doyon mine, a gold mine operation located in the Abitibi region, Quebec, Canada, to improve its sulphide tailings management. The environmental desulphurization process was first optimized using laboratory flotation tests and an on-line mobile flotation bank. Assessment of the acid generation potential of the separated fractions (sulphide concentrate and low sulphide tailings) was performed to demonstrate that low sulphide tailings were non-acid generating. The sulphide concentrate was then used to produce various CPB mixtures. The binder used with the reactive tailings was the one presently used at the mine: a combination of 30% Portland cement and 70% blast furnace slag, representing 5% of the total dry tailings weight. The cured CPB samples were submitted to uniaxial compressive strength tests and leachability tests. The results obtained from this study demonstrate that for the Doyon mine case, environmental desulphurization could produce non-acid generating low sulphide tailings and a sulphide concentrate. The sulphide concentrate could be used to produce a cemented paste backfill with adequate strength while improving its environmental behaviour in the CPB. (c) 2007 Elsevier Ltd. All rights reserved.