德格鲁萨矿高剪切混合膏体充填网优化

N. Steward, G. Allen, K. Tiedermann
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引用次数: 1

摘要

本文研究了DeGrussa矿山和Weir Minerals的Weir技术中心(WTC)在开发一种生产一致的胶结膏体充填体的工艺过程中所进行的工作,该工艺完全剪切,并在地下运输阶段呈现尽可能低的屈服应力和压力梯度。DeGrussa矿山现有的双轴糊状物搅拌机没有提供足够的剪切或剪切时间来提供完全均质化的产品。改善膏体回填体流变学的项目包括量化双轴搅拌机的性能以及膏体回填体产品屈服应力和压力梯度所需的流变学参数。为了达到所需的结果,在搅拌机后安装了离心泵,以提供快速连续地产生完全剪切的膏体回填体所需的剪切能。为了确保膏体充填体在整个德格鲁萨矿网系统中可预测的运输,需要完全剪切一致的膏体充填体。这种膏体回填性能的可预测性使管网系统安全可靠,同时确保了管道的完整性。较低的压力梯度,体现在完全剪切的膏体充填体上,也允许DeGrussa矿山充填距离较远的采场,否则就需要正位移泵送系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Paste backfill reticulation optimisation using high shear mixing at DeGrussa Mine
This paper investigates the work carried out by DeGrussa Mine and the Weir Technical Centre (WTC) of Weir Minerals Australia, in developing a process to produce a consistent cemented paste backfill that is fully sheared and presents the lowest possible yield stress and pressure gradients during the underground transport phase. The existing twin shaft paste mixer on DeGrussa Mine was not providing sufficient shear or time of shear to deliver a fully homogenised product. The project to improve the paste backfill rheology involved quantifying the performance of the twin shaft mixer as well as the required rheological parameters of yield stress and pressure gradient of the paste backfill product. In order to achieve the required outcome, a centrifugal pump was installed after the mixer to provide the shear energy required to produce a fully sheared paste backfill rapidly and continuously. A fully sheared consistent paste backfill is required to ensure predictable transport of the paste backfill throughout the DeGrussa Mine reticulation system. This predictability of paste backfill performance results in a safe and robust reticulation system, together with ensuring pipeline integrity. The lower pressure gradients, manifest by the fully sheared paste backfill, also allow DeGrussa Mine to fill stopes that are at a distance that would otherwise require a positive displacement pumped system.
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