Abstract

The studies concerning ore-dressing waste processing at the enterprises of the Kursk Magnetic Anomaly with the production of metals and building materials are described. About 1.8 billion tons of tailings have been stored there. A significant feature of deposit formation consists in the division of tailings by size and specific gravity using a water flow, since tailings are transported from the ore-dressing plant to the tailing pits by means of pipeline hydrotransport. The characteristics of tailings that originally showed wet magnetic separation of ferruginous quartzites taken from the Lebedinskoe deposit, as well as the methodology of investigation using a DESI-11 laboratory-scale disintegrator (Tallinn, Estonia), are presented. The authors have systematized the results for such tailings processing as: an agitation leaching in a percolator, agitation leaching after dry-state activation in a disintegrator, and reagent-driven leaching in a disintegrator. A regression analysis of experimental data has been performed, in which the iron extraction level depending on the values of variable factors inherent in the process is established. The used ore-dressing technologies are confined to the extraction limit, which results in the accumulation of processing tailings. The utilization of these tailings with traditional technologies is not profitable. However, the upgrading of ore-dressing processes could turn to be worthwhile with the use of hydrometallurgical and chemical technologies. It is shown that a promising direction in metal extraction from mining wastes consists in the combination of processing technologies based on the potentialities of the chemical ore-dressing and the activation in a disintegrator used in a joint manner. It has been determined that the mechanochemical activation of ore-dressing tailings in a disintegrator simultaneously with leaching can provide a significant increase in the extraction level, while the processing time is reduced hundredfold. Recommended technology could be in demand at mining enterprises with the prospects of switching for underground mining.

中文翻译：

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从选矿尾矿中提铁的机械化学技术

摘要

描述了库尔斯克磁异常企业与金属和建筑材料生产有关的选矿废物处理研究。那里储存了大约18亿吨尾矿。矿床形成的一个显着特征在于使用水流按大小和比重划分尾矿，因为尾矿通过管道水力运输从选矿厂运输到尾矿坑。介绍了最初显示出从 Lebedinskoe 矿床中提取的铁质石英岩的湿磁分离的尾矿特征，以及使用 DESI-11 实验室规模分解器（爱沙尼亚塔林）的调查方法。作者将尾矿处理的结果系统化，例如：在渗滤器中搅拌浸出，在分解机中干燥状态激活后的搅拌浸出，以及在分解器中由试剂驱动的浸出。对实验数据进行了回归分析，其中确定了取决于过程中固有可变因素值的铁提取水平。所采用的选矿技术仅限于提取极限，导致加工尾矿堆积。用传统技术利用这些尾矿是无利可图的。然而，随着湿法冶金和化学技术的使用，选矿工艺的升级可能变得值得。结果表明，从采矿废物中提取金属的一个有前途的方向在于将基于化学选矿潜力的处理技术与联合使用的破碎机中的活化相结合。已经确定，在浸出的同时在粉碎机中对选矿尾矿进行机械化学活化可以显着提高提取水平，同时将处理时间缩短一百倍。有转向地下采矿前景的采矿企业可能需要推荐技术。同时处理时间减少百倍。有转向地下采矿前景的采矿企业可能需要推荐技术。同时处理时间减少百倍。有转向地下采矿前景的采矿企业可能需要推荐技术。