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Size Matters on the Mesabi Range

机译：Mesabi系列的大小很重要

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The fragmentation distribution of the blasted ore is an important descriptor of blasting results. Traditionally it has been hard to measure quantitatively. Developments in image analysis over several years makes it more feasible to measure fragmentation before crushing on a continuous basis. Post crushing, mill feed distributions can also be measured. Drill to mill studies and implementations have shown that large sums of money can be saved and production increased when fragmentation is calibrated to downstream needs. An essential component of this process is the ability to measure fragmentation and make adjustments when distributions trend away from optimum. This paper discusses the history of fragmentation analysis on the Mesabi Range in Minnesota. The history of image analysis is discussed and current static and on-line analysis technology is described. The paper also discusses recent truck tipping and conveyor belt systems installed on the Range. Goals for the systems and some results are presented. Two conveyor belt on-line systems, for measuring the size distribution of greenball pellets are briefly discussed.
机译：喷砂矿石的碎裂分布是爆破结果的重要描述符。传统上，它很难定量测量。几年内图像分析的发展使测量碎片在连续粉碎之前更加可行。粉碎后，还可以测量轧机进料分布。钻取磨坊研究和实施表明，当碎片被校准到下游需求时，可以节省大笔资金并增加。该过程的基本组成部分是在分布趋势远离最佳时测量碎片化并进行调整的能力。本文讨论了明尼苏达州Mesabi系列的碎片分析史。讨论了图像分析的历史，并描述了当前的静态和在线分析技术。本文还讨论了最近安装在范围内的卡车划线和传送带系统。提出了系统的目标和一些结果。简要讨论了两个输送带在线系统，用于测量青球颗粒的尺寸分布。

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