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首页> 外文会议>Environmental innovations in the metals industry for the 21st century >Preparation and Evaluation of Sulphur Denuded Tailings as a Cover for High Sulphide Bearing Tailings
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Preparation and Evaluation of Sulphur Denuded Tailings as a Cover for High Sulphide Bearing Tailings

机译：含硫的尾矿作为高硫化尾矿盖的制备及评价

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High sulphide bearing mill tailings are preferably stored under water to minimize oxidation. Where this is impractical the contained sulphides generate sulphuric acid which mobilizes metals and can pose a danger to the ecological health of receiving water systems. Many techniques for isolating sulphide tailings from the atmosphere have been considered and testing has shown most to be lacking in some regard. Generally the benefits are not commensurate with the cost. One suggestion that has been explored is the covering of the sulphide tailings with 0.5 to 2 meters of a fine inert solid material to slow the rate of oxygen diffusion to the underlying sulphides, this cover will also reduce the capillary migration of soluble salts from the underlying sulphides to the cover surface, where it can cause root poisoning. This poisoning inhibits vegetative growth thus permitting erosion of the surface by wind or rain.rnA cover for a potentially acid generating tailings pond at 0.5 m depth requires a large tonnage of relatively inert or acid neutralizing material. Such material is not readily available in all locations, particularly in base metal mining areas such as the Canadian Shield where soil is thin and deposits of sand and gravel are sparse. Therefore separation of sulphides from mill tailings was explored to provide a relatively inert material as a by-product of normal operations and at low cost. This paper describes some of the test work carried out to determine the feasibility of providing such product and the evaluation of the resulting low sulphur product as a potential cover material.
机译：优选将含高硫化物的磨机尾矿存储在水下以最大程度地减少氧化。在不切实际的情况下，所含的硫化物会生成硫酸，该硫酸可动员金属，并可能对接收水系统的生态健康构成威胁。已经考虑了许多从大气中分离硫化物尾矿的技术，并且在某些方面最缺乏测试。通常，收益与成本不相称。已探索的一个建议是用0.5到2米的惰性细固体覆盖硫化物尾矿，以减慢氧气扩散到下面的硫化物的速度，这种覆盖还将减少可溶性盐从下面的盐的毛细迁移。硫化物进入覆盖物表面，会导致根部中毒。这种中毒抑制了植物的生长，因此允许其被风或雨水侵蚀。rn0.5m深度的潜在产酸尾矿池的覆盖物需要大吨位的相对惰性或酸中和材料。这种材料并非在所有地区都容易获得，特别是在贱金属开采地区，例如加拿大盾构，那里土壤稀薄，沙子和砾石的沉积物稀少。因此，研究了从工厂尾矿中分离硫化物以提供一种相对惰性的材料，作为正常操作的副产品且成本低廉。本文介绍了一些测试工作，以确定提供这种产品的可行性以及对所得低硫产品作为潜在覆盖材料的评估。

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