ISO 12743:2021 铜、铅、锌和镍精矿 测定金属和水分含量的取样程序

标准编号：ISO 12743:2021

中文名称：铜、铅、锌和镍精矿 测定金属和水分含量的取样程序

英文名称：Copper, lead, zinc and nickel concentrates — Sampling procedures for determination of metal and moisture content

发布日期：2021-05

标准范围

本文件规定了从流动溪流和固定批次中取样铜、铅、锌和镍精矿的基本方法，包括停止皮带取样，以根据相关国际标准提供化学分析、物理测试和水分测定用样品。如果浓缩物易发生显著氧化或分解，则使用具有足够代表性的普通样品（即无偏且足够精确）进行水分测定和化学分析，以消除偏差（见ISO？10251）。在进一步处理样品之前，将初级样品中存在的任何大团聚体（>；10？mm）粉碎。本文件明确排除了泥浆形式浓缩物的取样。停止皮带取样是收集浓缩物样品的参考方法，可与机械和手动取样程序进行比较。从流动的溪流中取样是首选方法。介绍了落流采样器和交叉带采样器。只有在无法从流动的溪流中取样的情况下，才能使用固定批次的取样。本文件中描述的从固定批次取样的程序只会将部分系统取样误差降至最低。

This document sets out the basic methods for sampling copper, lead, zinc and nickel concentrates from moving streams and stationary lots, including stopped-belt sampling, to provide samples for chemical analysis, physical testing and determination of moisture content, in accordance with the relevant International Standards. Where the concentrates are susceptible to significant oxidation or decomposition, a common sample that is sufficiently representative, i.e. unbiased and sufficiently precise, is used for moisture determination and chemical analysis to eliminate bias (see ISO 10251). Any large agglomerates (>10 mm) present in the primary sample are crushed prior to further sample processing. Sampling of concentrates in slurry form is specifically excluded from this document.Stopped-belt sampling is the reference method for collecting concentrate samples against which mechanical and manual-sampling procedures can be compared. Sampling from moving streams is the preferred method. Both falling-stream and cross-belt samplers are described.Sampling from stationary lots is used only where sampling from moving streams is not possible. The procedures described in this document for sampling from stationary lots only minimize some of the systematic sampling errors.

标准预览图