Abstract： AS 2806.6:2003 pdf download.Aluminium ores—Sampling Part 6: Methods for checking the bias of sampling. 3.2 It is recommended that,even afer a scries ofexperiments has been conducted,the experimentsshould be repeated at regular intervals a...

AS 2806.6:2003 pdf download.Aluminium ores—Sampling Part 6: Methods for checking the bias of sampling.

3.2 It is recommended that,even afer a scries ofexperiments has been conducted,the experimentsshould be repeated at regular

intervals and when-ever there is a change in ore qualily. The exper-iment should also bc repcated when there arechanges in

equipment or ore supply.

4 Sampling and sample preparationmethods

4.1 Sampling

The reference method (Method A) for checking theblas of sampllng is the stopped-ben method. Themethod to be checked (Method B)

shall be com-pared with Method A using the same material.

EXAMPLE: Mechanical sampling (see lSO 8685)

Method A: Stopped-belt sampling.

Method R- Take earh inrrement frnm the mouingconveyor with a mechanical sampler.

4.2 Sample preparation

Methods for making up a pair of samples, prep-aration of samples and testing shall be as given in 4.2.1 and 4.2.2.

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