GB/T 5751-2009 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 5751-2009 | English | 85 |
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Chinese coal classification
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| GB 5751-1986 | English | 70 |
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Classification of chinese coals
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GB/T 5751-2009: Chinese coal classification---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/GBT5751-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.040
D 20
Replacing GB 5751-1996
Chinese Classification of Coals
Issued on. JUNE 1, 2009
Implemented on. JANUARY 1, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 5
4 General Principles for Classification... 6
5 Classification... 8
Bibliography... 13
Foreword
This Standard replaces GB 5751-1986 “Classification of Chinese Coals”.
Compared with GB 5751-1986, this Standard has the following changes.
- The property of the standard was changed from recommendatory to mandatory;
- The compiling format and writing form of symbol and reference were modified in
accordance with the requirements of GB/T 1.1 and GB/T 3715;
- Chapters and sections of this Standard are rearranged; sorting parameter AND its
expression and determination method were put into one chapter (namely, 4.3.1);
- Description of the term "coal" and its definition were added (Chapter 3);
- 4.1 was added to demonstrate nature and purpose of this classification system;
- 4.2 “Requirements of Coal Samples for Coal Classification” was added.
This Standard was proposed by the China National Coal Association.
This Standard shall be under the jurisdiction of National Technical Committee on Coal
Chemical Industry of Standardization Administration of China.
Drafting organizations of this Standard. Beijing Research Institute of Coal Chemistry,
CCRI, Sinosteel Anshan Research Institute of Thermo-Energy Co., Ltd. AND Xi'an
Research Institute, CCRI.
Chief drafting staffs of this Standard. Luo Yunfei, Jiang Ying, Chen Yafei, Bai Xiangfei,
Meng Qingbo, Zhang Qun, Yang Jinhe, Chen Peng, Chen Wenmin, Feng Anzu,
Zhang Xiuyi, Hao Qi and Zhu Chunsheng.
The previous edition replaced by this Standard is.
- GB 5751-1986.
Classification of Chinese Coals
1 Scope
This Standard specifies classification system of Chinese coals based on application.
This Standard is applicable to the coals explored, produced, processed, utilized and
sold within the territory of the People's Republic of China.
2 Normative References
The following referenced documents are indispensable for the application of this
Standard. For the dated references, the subsequent amendments (excluding
corrigendum) or revisions of these publications do not apply. However, all parties who
enter into an agreement according to this Standard are encouraged to study whether
the latest edition of these documents applies. For the dated normative references, the
latest edition of the document referred to apply.
GB/T 212 Proximate Analysis of Coal (GB/T 212-2008, ISO 11722.1999,
Solid mineral fuels-Hard coal - Determination of moisture in the
general analysis test sample by drying in nitrogen, ISO 1171.1997,
Solid mineral fuels - Determination of ash, ISO 562.1998, Hard
coal and coke - Determination of volatile matter, NEQ)
GB/T 213 Determination of Calorific Value of Coal (GB/T 213-2008, ISO
1928.1995, Solid mineral fuels - Determination of gross calorific
value by the bomb calorimetric method and calculation of net
calorific value, MOD)
GB 474 Method for Preparation of Coal Sample (GB 474-2008, ISO
18283.2006, Hard coal and coke - Manual sampling, MOD)
3 Terms and Definitions
The following terms and definitions are applicable to this Standard.
Coal
It refers to the combustible solid organic sedimentary rock that is transformed from
plant remains through coalification and is rich in carbon, which contains a certain
amount of mineral substance; its corresponding ash content is less than or equal to
50% (dry mass fraction).
4 General Principles for Classification
4.1 The Chinese classification system of coals specified in this Standard is a kind of
application-oriented technical classification system, which can be used for.
4.2 Requirements of Coal Samples for Coal Classification
4.2.1 Single coal (from single coal seam or constituted of coal of same coalification
degree) is required to be adopted as sample in coal classification; blending coal
4.2.2 The coal sample for coal classification can also be exploration coal sample,
coal seam sample, production coal sample or commercial coal sample.
4.2.3 Sampling for coal classification
4.2.3.1 Sampling for exploration coal shall be in accordance with the requirements
of "Regulation on Coal sampling for Coal Resources Exploration".
4.2.4 Preparation for coal sample used for coal classification
Preparation for coal sample used for coal classification shall be in accordance with
the requirements of GB 474 and GB/T 19494.2.
4.2.5 Ash content of coal samples for coal classification
4.2.5.1 Dry-basis ash content productivity rate of coal samples for coal classification
4.3 Classification Parameters
4.3.1 There are two types of classification parameters – that is, the parameters used
to represent coalification degree AND the parameters used to represent coal
processing property.
4.3.2 Coal is divided into anthracite, bituminous coal and lignite according to
coalification degree parameters (mainly of volatiles of dry ash-free basis).
4.3.3 The division of anthracite's subclasses takes volatiles of dry ash-free basis
and hydrogen content of dry ash-free basis as indicators. However, if the results of the
two indicators are in conflict, hydrogen content of dry ash-free basis shall be taken as
the indicator.
4.3.4 Classification of bituminous coal shall take coalification degree and processing
property (mainly of cohesiveness) of bituminous coal into consideration at the same
time. Bituminous coal's parameters of coalification degree take volatiles of dry
ash-free basis as indicator;
4.3.5 Classification of lignite's subclasses takes light transmittance as indicator.
5 Classification
5.1 Coal Classification and Code
In this classification system, at first, coal is divided into anthracite, bituminous coal
and lignite according to indicators like volatiles of dry ash-free basis; then, bituminous
coal is divided into meagre coal, meagre lean coal, lean coal, coke, fat coal, 1/3 coke,
gas-fat coal, gas coal, 1/2 medium caking coal, weakly caking coal, non-caking coal
and long flame coal according to indicators such as volatiles of dry ash-free basis and
caking index. Various coal names can be code-designated as the following Chinese
phonetic letters.
5.2 Coding
Various coals are expressed by Arabian numerals. Tens-digit is divided in accordance
with the coal's volatiles, anthracite is 0 (Vdaf≤10.0%), bituminous coal is 1~4 (namely,
Vdaf >10.0%~20.0%, >20.0%~28.0%, >28.0%~37.0% and >37.0%), lignite is 5
(Vdaf >37.0%). For single-digit, anthracite is 1~3, representing degree of coalification;
bituminous coal is 1~6, representing cohesiveness; lignite is 1~2, representing degree
of coalification.
5.3 Chinese Coals Classification System Table
5.3.2 Classification of anthracite's subclasses is detailed in Table 2.
5.3.3 Classification of bituminous coal is detailed in Table 3.
5.4 Figure 1 demonstrates Chinese classification for coals.
Note 1.Ash content productivity rate of dry basis of coal samples for classification shall be less than or equal to 10%;
for coal samples with ash content productivity rate of dry basis greater than 10%, heavy-liquid method shall be
adopted for ash reduction before reclassification; for easy-muddy lignite with low coalification degree, raw coal
with minimum ash content can be adopted.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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