预选抛尾技术在钨选矿中应用的研究进展

    Research Progress on the Application of Preconcentration Tailings Discarding Technology in Tungsten Beneficiation

    • 摘要: 随着钨矿资源的深入开采,矿石贫化率逐年增高,原矿WO3品位降低,嵌布粒度变细,易选矿石日趋匮乏,钨资源呈贫、细、杂难处理化。由于矿石性质的变化,原有人工手选丢废率逐年下降,致使碎磨压力增大和选矿成本增加;同时矿山存在招工难、影响生产等问题。矿石预选是矿产资源领域节能减排、提高“三率”指标的重要手段之一,可应用于钨矿预选,提高入选WO3品位,以解决制约矿山企业减员、扩产降本增效的瓶颈问题,满足矿山大型工厂化对选矿技术的要求。本文着重介绍了辐射法拣选和重介质选矿两种矿石预选方法及其在钨矿石中的应用进展,最后指出必须依靠科技进步,通过开发利用高效智能的矿石预选技术、设备和工艺,才能大力提高钨资源开发、加工和利用的效率;并指出辐射法拣选+重介质选矿的联合工艺是矿石预选工艺发展的必然趋势,二者结合可实现钨矿石的全粒级预选。

       

      Abstract: With the further exploitation of tungsten resources, the ore dilution rate increases year by year, the WO3 grade of raw ore decreases, dissemination size becomes finer, the easy ore becomes increasingly scarce, and the tungsten resources are poor, fine and difficult to handle. Due to the change of ore properties, the waste rock rate of the original hand sorting decreased year by year, resulting in the increase of grinding pressure and mineral processing cost. At the same time, it is difficult to recruit workers and affect production. Ore preconcentration is one of the important means to save energy, reduce emission and improve the "three rate" index in the field of mineral resources. It can be applied to tungsten ore preconcentration to improve the selected WO3 grade, so as to solve the bottleneck problem of restricting the reduction of workers in mining enterprises, expanding production, reducing cost and increasing efficiency, and to meet the requirements of large-scale industrial mines on mineral processing technology. In this paper, the preseparation methods of ores, such as radiation picking and heavy medium beneficiation, and their application progress in tungsten resources are emphatically introduced. Finally, it is pointed out that the development, processing and utilization efficiency of tungsten resources can be greatly improved only by developing and utilizing efficient and intelligent ore preseparation technology, equipment and process on the basis of scientific and technological progress. It is also pointed out that the combined process of radiation sorting and heavy medium beneficiation is an inevitable trend in the development of ore preseparation, and the combination of the two can realize the full size preseparation of tungsten ore.

       

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