GB/T 23810-2021 English PDF (GBT23810-2021)

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GB/T 23810-2021: Commercial coal quality. Coal for direct liquefaction
GB/T 23810-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.040
CCS D 23
Replacing GB/T 23810-2009
Commercial coal quality - Coal for direct liquefaction
ISSUED ON: DECEMBER 31, 2021
IMPLEMENTED ON: JULY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration 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 Product quality grade and technical requirements ... 5 
5 Test methods ... 7 
6 Inspection rules ... 8 
7 Identification, transportation and storage ... 9 
Appendix A (Informative) Product catalogue ... 10 
Commercial coal quality - Coal for direct liquefaction
1 Scope
This document specifies the product quality grades and technical requirements, test
methods, inspection rules, identification, transportation and storage of coal for direct
liquefaction.
This document applies to raw coal for direct liquefaction in production, processing,
storage and transportation, sales, and use.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this
document and are indispensable for its application. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 211, Determination of total moisture in coal
GB/T 212, Proximate analysis of coal
GB/T 216, Determination of phosphorus in coal
GB/T 474, Method for preparation of coal sample
GB/T 475, Method for manual sampling of commercial coal
GB/T 476, Determination of carbon and hydrogen in coal
GB/T 2565, Determination of grindability index of coal - Hardgrove method
GB/T 3058, Determination of arsenic in coal
GB/T 3558, Determination of chlorine in coal
GB/T 5751, Chinese classification of coals
GB/T 6948, Method of determining microscopically the reflectance of vitrinite in
coal
GB/T 8899, Methods for coal maceral grouping and mineral determination
GB/T 16659, Determination of mercury in coal
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
GB/T 25209, Commercial coal marking
GB/T 30732, Proximate analysis of coal - Instrumental method
GB/T 30733, Determination of total carbon, hydrogen and nitrogen content in coal -
Instrumental method
SN/T 3511, Determination of mercury in minerals - General rules of direct mercury
determining with solid injection method
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 Product quality grade and technical requirements
4.1 General
Coal for direct liquefaction is classified according to volatile content, classified
according to hydrogen-carbon atomic ratio and ash content index, and expressed in the
form of “category + hydrogen-carbon atomic ratio grade + ash content grade”.
4.2 Product category
Coal for direct liquefaction is divided into two categories according to coal type, namely
lignite for direct liquefaction and bituminous coal for direct liquefaction. The
abbreviated codes are YH-HM and YH-YM, respectively. The coal types are mainly
long flame coal, non-stick coal, weakly sticky coal and gas coal in lignite and
bituminous coal. The coal category is determined according to GB/T 5751.
4.3 Quality requirements
4.3.1 Hydrogen-carbon atomic ratio grade
Coal for direct liquefaction is divided into two grades according to the hydrogen-carbon
atomic ratio (H/C) index, namely (H/C) grade 1 and (H/C) grade 2; for the
corresponding hydrogen-carbon atomic ratio index requirements for each product grade,
see Table 1.
5 Test methods
5.1 Ash and volatiles
The determination of ash and volatiles of coal shall be carried out in accordance with
GB/T 212 or GB/T 30732. The ash content of coal shall be arbitrated in accordance
with the slow ashing method in GB/T 212.
5.2 Carbon and hydrogen contents
The determination of carbon and hydrogen contents in coal shall be carried out in
accordance with GB/T 476 or GB/T 30733.
5.3 Total moisture
The determination of total moisture in coal shall be carried out in accordance with GB/T
211.
5.4 Phosphorus content
The determination of phosphorus content in coal shall be carried out in accordance with
GB/T 216.
5.5 Chlorine content
The determination of chlorine content in coal shall be carried out in accordance with
GB/T 3558.
5.6 Arsenic content
The determination of arsenic content in coal shall be carried out in accordance with
GB/T 3058.
5.7 Mercury content
The determination of mercury content in coal shall be carried out in accordance with
GB/T 16659 or SN/T 3511.
5.8 Grindability index
The determination of grindability index of coal (Hardgrove method) shall be carried out
in accordance with GB/T 2565.
5.9 Inertinite content
The determination of inertinite content shall be carried out in accordance with GB/T
8899.
e) When national or local quality supervision and management department proposes
a requirement for type inspection.
6.4.2 Type inspection items shall comply with the requirements of Table 4.
6.5 Determination rules
The quality of coal for direct liquefaction shall be determined in accordance with the
provisions of Table 3; when both the delivery inspection and type inspection results are
qualified, determine the batch of products qualified.
7 Identification, transportation and storage
7.1 Identification
7.1.1 Commercial coal produced and sold shall be identified according to the provisions
of GB/T 25209.
7.1.2 Identification, as a document accompanied the circulation of commercial coal,
shall include, but is not limited to, the following:
-- product name;
-- quantity:
-- place of origin;
-- nominal maximum particle size and appearance description;
-- main coal quality indexes: including but not limited to the indexes specified in
Chapter 4;
-- others: name and address of the producer or the dealer, production date, lot number,
document number, etc.
7.1.3 Identification shall be made of waterproof, anti-corrosion, and not-easy-to-
damage materials.
7.2 Transportation and storage
The transportation and storage of coal for direct liquefaction shall be dust-proof, rain-
proof, moisture proof, and away from fire.