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中国无机分析化学:2020,10(3):1-8
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装运铁矿石取样的最佳实践
HOLMES Ralph J.
(CSIRO Mineral Resources,Private Bag 10,Clayton South,Vic,3169,Australia)
Best Practice in Sampling Iron Ore Shipments
HOLMES Ralph J.
(CSIRO Mineral Resources,Private Bag 10,Clayton South,Vic,3169,Australia)
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投稿时间:2020-02-07    修订日期:2020-02-07
中文摘要: 商业交易的装运铁矿石取样应当按照ISO3082进行。尽管近年来合规性已有所改善,但在一些方面仍存在明显问题,包括:1)大流量样品截取器的设计和操作;2)在二级取样阶段对一级增量样品的划分;3)缩分之前用于减小样品粒度的破碎机的破碎性能;4)在每个取样阶段保留的样品质量5)样品缩分。取样是测量过程开始的地方,因此如果样品不具有代表性,整个过程在开始时就被破坏了。正确取样的“金规则”是“被取样物料的所有部分都必须有相等的概率被收集到并成为最终分析样品的一部分”。如果不遵守这一规则,那么就很容易引入偏差。例如,在实践中不可能从库存料堆或船舶现场采集到具有代表性的样品。必须在构建堆料或分解堆料时,或在船舶的装载或卸载时取样。
Abstract:Sampling of iron ore shipments for commercial transactions should be carried out in accordance with ISO 3082. While compliance has improved in recent years, there are still a number of areas where significant issues occur, including:1)Sample cutter design and operation for high capacity streams; 2)Division of primary increments at the secondary sampling stage; 3)Performance of crushers reducing particle size prior to division;4)Sample mass retained at each sampling stage;5)Sample division. Sampling is where the measurement process begins, so the whole process is corrupted at the outset if the sample is not representative. The “golden rule” for correct sampling is that “all parts of the material being sampled must have an equal probability of being collected and becoming part of the final sample for analysis”. If this rule is not respected, then bias is easily introduced. For example, in practice it is impossible to take a representative sample in-situ from a stockpile or ship. Samples must be taken while the stockpile is being built up or broken down, or while the ship is being loaded or unloaded.
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HOLMES Ralph J..装运铁矿石取样的最佳实践[J].中国无机分析化学,2020,10(3):1-8.
HOLMES Ralph J..Best Practice in Sampling Iron Ore Shipments[J].Chinese Journal of Inorganic Analytical Chemistry,2020,10(3):1-8.

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