GB/T 33689-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 33689-2017 | English | 125 |
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General Rules for Testing Methods of Coal Preparation
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GB/T 33689-2017: General Rules for Testing Methods of Coal Preparation---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT33689-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.040
D 27
General Rules for Testing
Methods of Coal Preparation
Issued on: MAY 12, 2017
Implemented on: DECEMBER 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Coal Sample ... 8
5 Dense Preparation ... 8
6 Result Expression ... 9
7 Test Records and Test Reports ... 10
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard was proposed by China National Coal Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Coal (SAC/TC 42).
Drafting organizations of this Standard. Tangshan Research Institute of China Coal
Technology & Engineering Group, Xi’an Dingli Fuel Testing Co., Ltd., and Tangshan
Branch of Tiandi Science & Technology Co., Ltd.
Chief drafting staffs of this Standard. Cao Xuezhang, Zhou Xiaomei, Zhao Zhiying, and
Yang Maoqing.
General Rules for Testing
Methods of Coal Preparation
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. For ease of use, some terms and
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.
3.16 Flocculant performance test
from the repeated determination in short term performed under the repeated conditions,
i.e. in the same laboratory, by the same operator, using the same instrument, against
the same specimen.
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.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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