铜,铅,锌和镍浓缩物.浆料的取样

[中文适用范围]： 本文件规定了对与液体（通常是水）混合形成浆料的颗粒材料进行采样的基本方法。 在工业以及采矿和矿物加工文献中，浆料也称为纸浆，但本文件中未使用该术语。 当细颗粒固体与液体的比例非常高时，材料呈软塑料形式，因此该混合物被正确地称为糊剂。 本文件不包括浆料取样。 本文件中描述的程序适用于对在移动流中作为浆料运输的颗粒材料进行取样，但不适用于加压浆料。 这些水流可以自由落下或被限制在管道、流槽、水槽、水闸、螺旋或类似通道中。 不建议在静止情况下对浆料进行采样，例如在储存容器或水坝中沉降或什至充分搅拌的浆料，并且不在本文件中进行讨论。 本文件描述了旨在提供代表所检查的浆料固体和浆料粒度分布的样品的程序。 在排出浆料样品中的流体并测量流体体积后，浆料中所含颗粒材料的潮湿样品可用于干燥（如果需要）并以无偏方式和已知的精确度测量一种或多种特性。 这些特性通过化学分析、物理测试或两者来测量。 所述采样方法适用于需要检查以验证是否符合产品规格、确定特性值作为贸易伙伴之间结算的基础或估计描述系统或程序的一组平均特性和差异的浆料。 如果流速不太高，则与其他采样程序进行比较的参考方法是将整个流转移到容器中并持续指定的时间或体积间隔。 该方法对应于 ISO 12743 中描述的停止带方法。 [外文原描述]： ISO 11794:2017 sets out the basic methods for sampling particulate material that is mixed with a liquid, usually water, to form a slurry. In industry and in the mining and mineral processing literature, slurry is also referred to as pulp, but this term is not used in ISO 11794:2017. At very high ratios of fine particulate solids to liquids where material assumes a soft plastic form, the mixture is correctly termed as a paste. Sampling of pastes is not covered in ISO 11794:2017. The procedures described in ISO 11794:2017 apply to sampling of particulate materials that are transported in moving streams as slurries, but not pressurized slurries. These streams may fall freely or be confined in pipes, launders, flumes, sluices, spirals or similar channels. Sampling of slurries in stationary situations, such as a settled or even a well-stirred slurry in a holding vessel or dam, is not recommended and is not covered in ISO 11794:2017. ISO 11794:2017 describes procedures that are designed to provide samples representative of the slurry solids and particle-size distribution of the slurry under examination. After draining the slurry sample of fluid and measuring the fluid volume, damp samples of the contained particulate material in the slurry are available for drying (if required) and measurement of one or more characteristics in an unbiased manner and with a known degree of precision. The characteristics are measured by chemical analysis, physical testing or both. The sampling methods described are applicable to slurries that require inspection to verify compliance with product specifications, determination of the value of a characteristic as a basis for settlement between trading partners or estimation of a set of average characteristics and variances that describes a system or procedure. Provided that flow rates are not too high, the reference method against which other sampling procedures are compared is one where the entire stream is diverted into a vessel for a specified time or volume interval. This method corresponds to the stopped-belt method described in ISO 12743.