GB/T 24233-2009Manganese and chromium ores -- Experimental methods for evaluation of quality variation and methods for checking the precision of sampling (English PDF)

Foreword

This standard is equivalent to using ISO 8542. 1986 "Standard Test Method for checking the quality fluctuations and sampling precision manganese and chrome ore assessment." this standard and ISO 8542. Comparison of 1986, mainly made the following editorial changes.

--- "This International Standard" by "this standard";

"." --- With a decimal point instead of a comma as the decimal point, "";

--- Delete international standards foreword.

The standard proposed by China Iron and Steel Association.

This standard by the National Standardization Technical Committee of pig iron and ferroalloy.

This standard was drafted. Ningbo Inspection and Quarantine Institute of Science and Technology, Tianjin Entry-Exit Inspection and Quarantine of Guangdong, Metallurgical Industry Information Standards Institute.

1 Scope

This standard specifies the assessment of natural or processed manganese, chrome ore quantitative methods of test quality fluctuations and related standards used to take Sampling procedures defined sample and secondary sampling time. It also provides that when sampling systems and secondary quantitative sampling check sampling precision test method.

Note. When assessing the quality of the sampling timing system volatility sampling procedures must be established on the basis of sampling timing system.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 24243 chrome ore samples taken parts (GB/T 24243-2009, ISO 6153. 1989, IDT) ISO 4296-1 manganese ore sampling - Part 1. Sampling increment ISO 4296-2 manganese ore sampling - Part 2. sample preparation

3 Test Method for Evaluating quality fluctuations --- General Conditions