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首页> 外文期刊>Journal of Cleaner Production >Reducing mine water use in arid areas through the use of a byproduct road dust suppressant
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Reducing mine water use in arid areas through the use of a byproduct road dust suppressant

机译：通过使用副产品道路抑尘剂减少干旱地区的矿井用水

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Water scarcity is a critical global-scale social risk. Several factors are affecting the availability of fresh water, like global population growth and the increase of industrial activities. Particularly in the mining industry, water is a critical resource for mineral production and road maintenance. Haul roads in surface mining operations are traditionally treated with large amounts of water to reduce dust emissions caused by large trucks that generate up to 97% of mine dust that reduces safety and mining productivity. An alternative to reduce dust in mining roads is the use of Magnesium Chloride Hexahydrate (6H(2)O center dot MgCl2), which is a byproduct of the local lithium. So far, there is no scientific evidence that combines laboratory and field research to assess the effectiveness of an industrial byproduct used as a dust control for mining haul roads. This paper reports a quantitative analysis of the effectiveness of 6H(2)O center dot MgCl2 in reducing operational water based on a laboratory and field study. Laboratory results show an important water retention effect in 6H(2)O center dot MgCl2 treated soils compared to untreated soils. In addition, results showed that soils exposed to higher air relative humidity increases the water absorption from the air, confirming the hygroscopic property of 6H(2)O center dot MgCl2. Field results collected for a year in a copper mine located in an arid area of Chile showed that water consumption in haul roads treated with water only is on average 153 times higher than water consumption in roads treated with 6H(2)O center dot MgCl2 brine. In other words, 6H(2)O center dot MgCl2 brine treatment allows approximately 99% of water saving. The dust monitoring system using a laser device demonstrated that, on average, dust emissions are 3.4 times higher in roads treated with water only than in roads treated with 6H(2)O center dot MgCl2 brine. Overall, the study concludes that using 6H(2)O center dot MgCl2 brine effectively reduces water consumption used for dust suppression in haul roads, demonstrating that the use of 6H(2)O center dot MgCl2 byproduct is a very promising material for addressing water management issues in the mining industry. (C) 2019 Elsevier Ltd. All rights reserved.
机译：缺水是全球范围内的关键社会风险。一些因素正在影响淡水的供应，例如全球人口的增长和工业活动的增加。特别是在采矿业中，水是矿产和道路维护的重要资源。传统上，露天采矿作业中的拖运道路要经过大量的水处理，以减少大型卡车产生的粉尘排放，而大型卡车会产生高达97％的矿山粉尘，从而降低安全性和采矿效率。减少采矿道路中粉尘的一种替代方法是使用六水合氯化镁（6H（2）O中心点MgCl2），这是当地锂的副产品。到目前为止，还没有科学证据可以结合实验室和现场研究来评估用作采矿拖运道路的粉尘控制的工业副产品的有效性。本文报告了基于实验室和现场研究对6H（2）O中心点MgCl2减少工作用水的有效性的定量分析。实验室结果表明，与未处理的土壤相比，在6H（2）O中心点MgCl2处理的土壤中具有重要的保水作用。此外，结果表明，暴露于较高空气相对湿度的土壤增加了从空气中的吸水率，从而确认6H（2）O中心点MgCl2的吸湿性。在智利干旱地区的一个铜矿中收集的一年的田间结果表明，仅用水处理的运输道路上的用水量平均比使用6H（2）O中心点MgCl2盐水处理的道路上的用水量高153倍。换句话说，6H（2）O中心点MgCl2盐水处理可节省大约99％的水。使用激光设备的粉尘监测系统表明，仅使用水处理的道路上的粉尘排放量平均比使用6H（2）O中心点MgCl2盐水处理的道路高3.4倍。总体而言，该研究得出的结论是，使用6H（2）O中心点MgCl2盐水可有效减少拖运道路中用于抑尘的水消耗，这表明使用6H（2）O中心点MgCl2副产物是解决水问题的非常有前途的材料采矿业的管理问题。 （C）2019 Elsevier Ltd.保留所有权利。

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