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Use of Metallurgical Test Data in Resource Evaluation for Magnetite Deposits

机译：冶金测试数据在磁铁矿矿床资源评估中的应用

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摘要

Metallurgists frequently use a small number of large samples to characterise expected millrnperformance, with the a priori assumption that these few samples are representative of thernentire deposit. Geometallurgical sampling is becoming more prevalent as a way to use manyrnsmaller samples to indicate the expected recovery as part of the Mineral Resource or Ore Reservernestimation.rnRecent increases in prices for iron ore, together with the potential to produce high iron andrnlow contaminant concentrates, have resulted in a renewed interest in recovering magnetite fromrnbanded iron formation and other deposits.rnGeometallurgical evaluation of magnetite involves approaches to sample preparation, samplernanalysis and resource estimation that are different from the methods commonly used for haematiterniron ore. The magnetite sampling protocol is specifi c to each deposit, and is typically designedrnaround a specifi c metallurgical fl ow sheet.rnThe sampling protocol will typically include the use of Davis Tube analysis. The Davis Tube is arnbench-scale test that is used for determining the mass magnetic recovery from a small amount ofrnsample ground to a specifi c size. The magnetic concentrate may then be analysed and together withrnthe mass magnetic recovery, may be used to simulate the expected mill recovery.rnDuring resource modelling, the mass magnetic recoveries and concentrate grades may bernassigned to a block model using regressions with other chemical constituents, or may be estimatedrndirectly. For estimation of the concentrate grades, a weighting can be applied to account for therndifferent mass magnetic recoveries from each sample and the impact of these differences on thernconcentrate estimates.rnThis paper presents an overview of the use of metallurgical test data in resource evaluation forrnmagnetite deposits.
机译：冶金学家经常使用少量的大样本来表征预期的铣削性能，并先验地假设这几个样本代表了熔池沉积物。作为使用矿物样品或矿石储量预测的一部分的更小的样本来表明预期的采收率的一种方法，地质冶金采样正变得越来越普遍。铁矿石价格的近期上涨，以及产生高铁和低铁精矿的潜力为了从带状铁矿和其他矿床中回收磁铁矿，人们重新提出了兴趣。磁铁矿的冶金学评估涉及样品制备，样品分析和资源估算的方法，这些方法不同于常用的赤铁矿。磁铁矿采样方案是针对每种矿床而专门设计的，通常围绕特定的冶金流片进行设计。采样方案通常包括使用戴维斯管分析法。戴维斯电子管是arnbench规模测试，用于确定从少量研磨样品到特定尺寸的质量磁回收率。然后可以分析磁精矿，并与质量磁回收率一起使用，以模拟预期的轧机回收率。在资源建模期间，可以使用其他化学成分的回归将质量磁回收率和精矿品级指定为块模型，或者可以直接估计。为了估算精矿品位，可以使用权重来说明每个样品的不同质量磁回收率以及这些差异对精矿估算的影响。本文概述了冶金测试数据在资源评估磁铁矿中的应用。

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  • 来源
    《Iron ore 2011》|2011年|p.241-247|共7页
  • 会议地点 Perth(AU)
  • 作者

    J N Farrell; A D Miller;

  • 作者单位

    Senior Geologist, Golder Associates Pty Ltd, Level 3, 1 Havelock Street, West Perth WA 6005. Email: jfarrell@golder.com.au;

    Principal Resource Geologist, Golder Associates Pty Ltd, Level 3, 1 Havelock Street, West Perth WA 6005. Email: almiller@golder.com.au;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
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