GB/T 25945-2010Aluminium ores -- Sampling procedures (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard uses translation method to identically adopt ISO 8685.1992 "Aluminium

ores -- Sampling procedures".

Annex A, Annex B, Annex C, and Annex D of this Standard are informative.

This Standard shall be under the jurisdiction of National Technical Committee on Non-

ferrous Metals of Standardization Administration of China (SAC/TC 243).

The drafting organizations of this Standard. Aluminum Corporation of China Shandong

Branch, China Nonferrous Metals Industry Standard Calculation Quality Research

Institute.

Main drafters of this Standard. Wang Zhaowen, Li Linhai, Shao Jing, An Kun, Pei

Cunyan, Yang Kaiguo, Li Hong.

Aluminium ores -- Sampling procedures

1 Scope

This Standard sets out requirements for the sampling of aluminium ores from moving

streams and stationary situations, including slopped-belt sampling, to provide gross

samples for sample preparation. Stopped-belt sampling is the reference method for

collecting ore samples against which other sampling procedures may be compared.

Sampling from moving streams is the preferred method. Sampling from stationary

situations should only be considered when sampling from moving streams is not

possible. The procedures described in this Standard for sampling from stationary

situations merely minimize some of the sampling errors.

Although this Standard is intended to cover all aluminium ore sampling from moving

streams. the procedures recommended may not be applicable in cases of extreme

segregation. For example, very wet ore due to its sticky nature. or very dry ore due to

generation of dust. In such cases it may be necessary to revert to stopped-belt sampling.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 3358.1, Statistics -- Vocabulary and symbols -- Part 1.General statistical

terms and terms used in probability

GB/T 25943-2010, Aluminium ores -- Experimental methods for checking the

precision of sampling (ISO 10277.1995, IDT)

GB/T 25944-2010, Aluminium ores -- Experimental determination of the

heterogeneity of distribution of a lot (ISO 6139.1993, IDT)

GB/ T 25946-2010, Aluminium ores -- Experimental methods for checking the bias

of sampling (ISO 10226.1991, IDT)

GB/T 25947-2010, Aluminium ores -- Determination of the moisture content of bulk

material (ISO 9033.1989, IDT)

GB/T 25949-2010, Aluminium ores -- Preparation of samples (ISO 6140.1991, IDT)

GB/ T 25950-2010, Aluminium ores -- Experimental determination of the

heterogeneity of constitution (ISO 6138.1991, IDT)

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