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GB/T 46288-2025: Maceral classification for brown coals and lignites
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Maceral classification for brown coals and lignites
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Standard similar to GB/T 46288-2025
SN/T 4763 | GB/T 33689 | GB/T 477 | GB/T 46291 | GB/T 46289 | Basic data
| Standard ID | GB/T 46288-2025 (GB/T46288-2025) |
| Description (Translated English) | Maceral classification for brown coals and lignites |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | D26 |
| Classification of International Standard | 73.040 |
| Word Count Estimation | 22,214 |
| Date of Issue | 2025-10-05 |
| Date of Implementation | 2026-05-01 |
| Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China |
GB/T 46288-2025: Maceral classification for brown coals and lignites
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 73.040
CCSD26
National Standards of the People's Republic of China
Classification of microstructures of lignite
Published on 2025-10-05
Implemented on May 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Classification criteria 2
5.Classification Scheme 2
Appendix A (Informative) Description of Microscopic Components of Lignite 5
References 16
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China National Coal Association.
This document is under the jurisdiction of the National Coal Standardization Technical Committee (SAC/TC42).
This document was drafted by. China University of Mining and Technology (Beijing), China Coal Technology & Engineering Group Xi'an Research Institute Co., Ltd., and Jiangsu Geological and Mineral Resources Design Institute.
Research Institute.
The main drafters of this document are. Tang Yuegang, Wang Shaoqing, Xiao Wenzhao, Zhang Qun, Zhang Guchun, and Zhu Shifei.
Classification of microstructures of lignite
1 Scope
This document specifies the classification criteria and classification scheme for the microscopic components of lignite.
This document applies to lignite with a random reflectance of humus less than or equal to 0.40%.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 5751 Classification of Chinese Coal
GB/T 12937 Coal and Petrology Terminology
3 Terms and Definitions
The terms and definitions defined in GB/T 5751 and GB/T 12937, as well as the following terms and definitions, apply to this document.
3.1
Huminite
The microscopic components of lignite, formed from the lignocellulosic tissue of plants through humification and gelation, have a reflectivity intermediate between that of the same coal.
Between the darker lipid bodies and the brighter inert bodies in the sample, there is a gray micro-component.
Note. Huminite group is abbreviated as huminite group, and when emphasizing an individual, it is called huminite.
3.2
structural humus telohuminite
Subgroups of septic tissue microstructure in plant cells.
3.3
wooden structure textinite
A humic substance with clearly identifiable plant cell structure.
3.4
ulminite
The humic body, a structure of plant cells whose structure is faintly discernible.
3.5
Detrihuminite
Subgroup of humic microstructure with unidentifiable plant cell structure and particle size less than 10 μm.
3.6
attrinite
Loose and porous detrital humus.
3.7
densinite
Amorphous, dense detrital humus.
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