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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Application of fundamentals in optimizing platinum concentrator performance
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Application of fundamentals in optimizing platinum concentrator performance

机译：基本原理在优化铂选矿厂性能中的应用

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摘要

A number of challenges face platinum concentrator plant operators. These challenges include the increase in operating costs, the increase in smelter cost for the processing of concentrate, the shortage and cost of power, and the tightening of specifications on concentrate quality by the toll-smelting operations. Over the years the focus has moved from extracting the platinum group metals (PGM) from the Merensky Reef to the UG2 reef. This has a number of advantages, including the higher 'basket price' for UG2 concentrate, reduced raining cost per unit volume as a result of the higher density of UG2, and the reduction in overall concentrate tonnage to be smelted. In many cases the Merensky ore has been fully exploited and it makes sense for the focus to shift to the UG2 ore that can be accessed through the Merensky shaft infrastructure. The presence of relatively high levels of chromite in UG2 concentrate is, however, a major disadvantage due to the problems associated with smelting such a concentrate in conventional submerged arc furnaces. In addition to increasing the specification on the minimum PGM grade of concentrates, smelters have had to impose strict specifications on the levels of chromite in the concentrate. The threat of high penalties has forced concentrators to change their modus operandi, often resulting in a significant loss in recovery. The final concentrate grades and PGM recoveries are shown to vary significantly throughout the industry. The reasons for this include varying ore mineralogy and different operating philosophies. This would therefore imply that the opportunity exists to optimize the operations by considering fundamental aspects such as the PGM mineralogy and the application of appropriate technologies. By returning to the fundamentals of flotation and applying the findings of detailed process reviews, it has been possible to increase the concentrate PGM grade, reduce the concentrate chromite grade, and in some cases increase the recovery of PGM to concentrate. This paper presents case studies where this approach has been used to successfully optimize concentrator performance, resulting in lower operating cost and higher PGM production.
机译：铂选矿厂的运营商面临许多挑战。这些挑战包括运营成本的增加，精矿加工的冶炼厂成本的增加，电力的短缺和电力成本的增长，以及收费冶炼操作对精矿质量规范的收紧。多年来，重点已从从梅伦斯基礁（Merensky Reef）提取铂族金属（PGM）到UG2礁。这具有许多优势，包括UG2精矿的“篮子价格”更高，由于UG2的密度更高而降低了每单位体积的雨水成本，以及要冶炼的总精矿吨数的减少。在许多情况下，Merensky矿石已得到充分开发，将重点转移到可以通过Merensky竖井基础设施进行开采的UG2矿石上是有意义的。然而，由于与在传统的埋弧炉中熔炼这种精矿有关的问题，UG2精矿中铬铁矿含量较高是一个主要缺点。除了提高对最低PGM精矿品位的规范外，冶炼厂还必须对精矿中亚铬酸盐的含量施加严格的规范。高额罚款的威胁迫使选矿厂改变其作案手法，常常导致恢复的重大损失。在整个行业中，最终精矿品位和PGM回收率显示出很大差异。其原因包括不同的矿石矿物学和不同的经营理念。因此，这意味着存在通过考虑诸如PGM矿物学和适当技术的应用等基本方面来优化运营的机会。通过回到浮选的基础并应用详细的工艺审查结果，可以提高精矿的PGM品位，降低精矿的亚铬酸盐品位，在某些情况下可以提高PGM到精矿的回收率。本文介绍了使用这种方法成功优化选矿厂性能的案例研究，从而降低了运营成本并提高了PGM产量。

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