Online rheology monitoring of a thickener underflow

AG Chryss, A Monch, K Constanti-Carey
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Abstract

The perceived need for accurate and reliable methods of measuring suspension rheology in real time arises from the greater demands being placed on mineral processing operations. To extend mine life and reduce TSF footprint the adoption of finer grinds, higher solids concentration and high clay ores result in complex multiphase suspensions that need close monitoring to optimise thickener performance, pipeline transport and tailings deposition. Often the control of the processing or transport of these suspensions can be related to its rheology. However, due to the involved nature of rheological measurement for suspensions and the nuanced interpretation of data necessary to produce useful decisions, rheometry has only seen limited application in process monitoring. A robust unit that can measure, analyse and interpret the rheology of a process stream continuously and unattended is needed. The CSIRO has developed an online rheometer to address this problem. This paper describes the process prior to the deployment of the online rheometer to an Australian goldfield site, comparing online rheological measurement to benchmark laboratory values.
稠化剂底流的在线流变监测
由于对矿物加工作业的要求越来越高,人们认为需要准确可靠的方法来实时测量悬浮液流变。为了延长矿山寿命和减少TSF足迹,采用更细的磨矿,更高的固体浓度和高粘土矿石导致复杂的多相悬浮液,需要密切监测以优化增稠器性能,管道运输和尾矿沉积。通常,对这些悬浮液的加工或运输的控制与它的流变性有关。然而,由于悬浮液流变测量涉及的性质以及产生有用决策所需的数据的细微解释,流变测量在过程监控中的应用有限。需要一个强大的单元,可以测量,分析和解释一个过程流的流变连续和无人值守。CSIRO开发了一种在线流变仪来解决这个问题。本文描述了在线流变仪在澳大利亚金矿现场部署之前的过程,并将在线流变测量值与基准实验室值进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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