Coarse waste rejection through size based separation
Coarse waste rejection through size based separation
复制标题
通过基于尺寸的分离来剔除粗废物
DOI：
10.1016/j.mineng.2013.12.018
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发表时间：
2014
影响因子：
4.8
通讯作者：
R. Bearman
中科院分区：
文献类型：
--
作者：
D. J. Bowman;R. Bearman
采矿和加工业依赖于在采矿过程中避免废物，然后在加工过程中通过粉碎和选矿逐步去除废物和污染物。不幸的是，大多数含金属作业中有价值的内容品位较低，这意味着大量伴生的主岩和脉石会伴随有价值的材料进入加工厂。废物拒绝可以被认为是矿物提取的另一面，重点是开发被过程拒绝的贫瘠材料流，其中含有最少的有价值金属。矿山经济成功的关键在于以尽可能少的资本支出和能源投资从主岩中释放出金属。Newcrest Mining Ltd. 发起了一项调查，研究如何在其各个运营矿场中采用废物剔除技术，以及如何将其用于未来的运营。整个项目研究了一系列能够在较粗尺寸范围内部署的废物剔除技术，其中包括基于尺寸、重力、物理和化学特性的系统。这一举措是纽克雷斯特正在进行的战略的一部分，该战略旨在重新研究“从矿场到磨坊”的研究领域，真正使其成为一种关注所有潜在价值机会的全系统方法。本文对纽克雷斯特特尔弗工厂进行的基于规模的废物拒绝工作进行了分析。这项研究的结果表明，一些工艺流程具有巨大的废物拒绝潜力，但在大多数情况下，没有“一次性”废物拒绝选项。相反，拒绝过程变成了一系列解放-独立的循环。在每个阶段，材料物理特性的改变为剔除技术提供了不同的可能性。
The mining and processing industry relies on the avoidance of waste during mining, followed by the progressive removal of waste and contaminants via comminution and beneficiation during processing. Unfortunately the low grade of valuable content in most metalliferous operations dictates that vast quantities of associated host rock and gangue accompanies the valuable material to the processing plant.Waste rejection can be considered the flip side to mineral extraction, with the focus being on the development of a barren material stream that is rejected by the process, with minimal valuable metal contained. The key to a mine’s economic success lies in the liberation of the metal from within the host rock with the smallest possible investment in capital expenditure and energy.Newcrest Mining Ltd., initiated an investigation into how waste rejection could be employed across their various operating mine sites and how it could be used in future operations. The total project examines a range of waste rejection techniques capable of deployment at coarser size ranges and these include systems based on, size, gravity, physical and chemical properties. This initiative is a component of the on-going Newcrest strategy of re-working the research area of “mine to mill”, to truly make it a system wide approach that looks at all the latent value opportunities.This paper provides analysis of sized based waste rejection work undertaken at the Newcrest Telfer site. The results of this study show that some process streams offer significant potential for waste rejection, but in most cases there is no ‘one pass’ waste rejection option. Rather the rejection process becomes a series of liberate-separate cycles. At each stage the altered physical characteristics of the material open different possibilities for rejection techniques.