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GB/T 33689-2017General rules for testing methods of coal preparation (English PDF)

选煤试验方法一般规定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 12, 2017

Implementation date

December 1, 2017

Scope

GB/T 33689-2017 is the English-translated version of 选煤试验方法一般规定.

GB/T 33689-2017 lays down the common ground for all coal preparation test methods: the terms and definitions, the symbols, the test coal sample, the preparation of dense media, how results are expressed, and what the test record and test report must contain.

For the coal sample it points to GB/T 474, GB/T 475, GB/T 19494.1 and GB/T 19494.2, and prescribes sealed containers for moisture samples, air drying for general test samples and full mixing before analysis sampling.

For dense media it separates the inorganic media, high-density media and zinc chloride solution, from the organic media prepared from carbon tetrachloride with benzene or with methenyl bromide, and gives dilution and evaporation as the preparation routes.

It applies to coal preparation test method standards, reports, books and manuals. Issued on 12 May 2017, it has applied since 1 December 2017.

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Document preview — GB/T 33689-2017

National Standard of the People's Republic of China

ICS: 73.040
Classification: D 27

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative References4
3 Terms and Definitions4
4 Coal Sample8
5 Dense Preparation8
6 Result Expression9
7 Test Records and Test Reports10

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

1 Scope

This Standard specifies the relevant terms and definitions, symbols, test coal sample, dense preparation, result expression, test record, and test report of coal preparation.

This Standard is applicable to various coal preparation test method standards, norms, reports, books, teaching materials and manuals.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 474 Method for the Preparation of Coal Sample

GB/T 475 Method for Manual Sampling of Commercial Coal

GB/T 483 General Rules for Analytical and Testing Methods of Coal

GB/T 3715-2007 Terms Relating to Properties and Analysis of Coal

GB/T 7186-2008 Terms Relating to Coal Preparation

GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values

GB/T 19494.1 Mechanical Sampling of Coal - Part 1: Method for Sampling

GB/T 19494.2 Mechanical Sampling of Coal - Part 2: Method for Sample Preparation

3 Terms and Definitions

The following terms and definitions and those ones stipulated in GB/T 3715-2007 and GB/T 7186-2008 are applicable to this document. […]

3.8 Dense

Liquid or solution with density greater than water, which is used for coal float-and-sink analysis. The dense can be divided into organic dense, zinc chloride dense and inorganic high-density dense. [GB/T 7186-2008, definition 5.4.1]

3.9 Float-and-sink analysis; float-and-sink test

The coal samples are divided into different density grades with different dense. [GB/T 7186-2008, definition 3.2.2]

3.10 Test coal's degradation in water

The test adding water to the tumbling bucket containing coal and its associated minerals, overturning for different time to measure the degree of its re-crushing, which includes the test for degradation in water of coal in drum, and assessment of the liability to breakdown in water of materials associated with coal seams.

3.11 The ratio of degradation in water

In the determination results of degradation in water, the ratio between the mass of 10µm fine clay and total mass of 0.5mm minus sieve.

3.12 Flotation test

The test aims to determine the floatability and flotation process of coal dust (slurry).

3.13 Batch-flotation test

Flotation test performed by the single-tank flotation machine. [GB/T 7186-2008, definition 5.6.40]

3.14 Timed-release analysis

The unit flotation test with once coarse selection and multiple fine selection process. [GB/T 7186-2008, definition 5.6.41]

3.15 Natural falling test

The discrete settling test against the coal slurry sample containing no flocculant or coagulant.

4 Coal Sample

4.1 Collection and preparation of coal sample

Perform as per GB/T 474, GB/T 475, GB/T 19494.1 and GB/T 19494.2.

4.2 Storage of coal sample

The water sample shall be packed in the sealed container; the sample for general test shall be dried to the air-dry state, then sealed and stored in the sample bag with waterproof function.

4.3 Analysis test sampling

The coal sample shall be mixed fully before sampling, the multi-point sampling method shall be taken for the sampling process.

5 Dense Preparation

5.1 Commonly-used dense

The commonly-used laboratory dense is divided into organic and inorganic dense; the inorganic dense is the high-density dense and zinc chloride solution; while the organic dense is preparation solution between carbon tetrachloride and benzene, and the preparation solution between carbon tetrachloride and methenyl bromide.

5.2 Dense preparation

The inorganic high-density dense shall be prepared by dilution method; the diluted dense can be concentrated by evaporation method, so that improve the density. The preparation of zinc chloride organic dense can refer to Table 1. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 474 · GB/T 475

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