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Co-Mixing of Tailings, Waste Rock and Slag to Produce Barrier Cover Systems

机译:尾矿,废岩和渣的共混生产障碍盖系统

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Engineered soil covers are used for final closure options for both waste rock and tailings disposal facilities. Currently, cover construction requires excavation of appropriate cover material from a nearby site. If no suitable materials are available, the mine operation may have to ship appropriate materials long distances to the site before the construction of the cover can even begin. This has led to the proposal to engineer cover materials using existing waste materials from the mining operation. The paper presented here describes the results of a laboratory scale testing program to evaluate the potential for blending waste rock, smelter slag and tailings for the creation of a suitable cover material at a site in Canada. Tailings from the local mill, waste rock and slag were collected in the field and blended to create a material with an air entry value similar to the tailings and with physical strength similar to the waste rock. Testing indicated this mixed material could be blended at a consistency of a paste and was suitable for pumping. It can also be compacted to a high-density material. The preliminary results show that it may be possible to blend waste rock, slag and tailings into a material that can be utilised in the construction of a water retaining cover.
机译:工程的土壤盖子用于废岩和尾矿处理设施的最终封闭选项。目前,覆盖施工需要从附近的网站上挖掘适当的覆盖材料。如果没有合适的材料,则矿井操作可能必须在盖子的构造之前将适当的材料长距离到达现场。这导致了使用现有的废料从采矿操作来工程覆盖材料的提议。本文介绍的论文描述了实验室规模测试程序的结果,以评估混合废岩,冶炼厂炉渣和尾矿的可能性,以在加拿大的网站上创建合适的覆盖材料。从本地轧机,废岩和炉渣的尾矿被收集在该领域并混合,以产生具有类似于尾矿的空气入口值的材料,以及类似于废岩的物理强度。测试表明该混合材料可以以糊状物的一致性混合,并且适合泵送。它也可以压实到高密度材料。初步结果表明,可以将废岩,炉渣和尾矿混合成可用于施加水盖的结构中的材料。

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