This standard specifies the classification principles of microscopic coal and rock types, the classification of microscopic coal and rock types, microscopic mineralization types and microscopic mineral types. This standard applies to bituminous coal and anthracite. GB/T 15589-1995 Classification of microscopic coal and rock types GB/T15589-1995 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Classification of microlithotypes
Classification of microlithotypeGB/T 15589--1995
This standard adopts IS0)7404/11984 (E) Bituminous and anthracite coal petrographic analysis methods Part 1: Terminology of bituminous and anthracite coal petrographic analysis.
Subject content and scope of application
This standard specifies the classification principles of microlithotypes, the classification of microlithotypes, micromineralization types and micromineral types. This standard applies to bituminous and anthracite.
2 Reference standard
GB/T15588 Classification of bituminous coal micro-components
3 Classification principle
The microscopic coal rock type is a natural symbiotic combination of microscopic components, with a minimum thickness of 50um or a minimum coverage area of ​​50um×50um, and is determined by the number (volume percentage) of microscopic component groups (or microscopic components) that are equal to or greater than 5%. It may contain less than 20% of minerals (such as clay, quartz, carbonate) or less than 5% of sulfide minerals. If the mineral content exceeds the above amount, it is called a micro-mineralization type or a micro-mineral type according to the ratio of microscopic components to minerals. Classification of microscopic coal rock types
The classification of microscopic coal rock types is shown in Table 1.
Table 1 Classification of microscopic coal and rock types
Microscopic coal and rock types
Single-group grouping type
Microscopic coal
Micro-shell coal
Micro-emotional coal
Two-group grouping type
Micro-shell coal
Micro-dark coal
Microscopic inert coal
Three-group grouping type
Micro-triple coal
Vitrinite
Shellite
Inertite
Vitrinite + shellite
Inertite + shellite
vitrinite+inertinite
Volume percentage of micro-component group
>95%1)
>95%1)
vitrinite+shellite+inertinite
Note: ①The vitrinite in this standard is equivalent to the vitrinite plus semi-vitrinite in the classification of GB/T15588; ②The various micro-coal rock types can be further divided into several sub-types according to the micro-components and their contents as needed; 1) The volume percentage of any micro-component group is greater than or equal to 5%. Approved by the State Bureau of Technical Supervision on June 12, 1995 and implemented on February 1, 1996
5 Classification of micro-mineralization types
The classification of micro-mineralization types is shown in Table 2.
Micro-mineralization type
Micro-mud coal
Micro-siliceous coal
Micro-carbonate coal
Micro-sulfide coal
Micro-complex mineral coal
Micro-mineralization type
Carbonate
Sulfide
GB/T 15589--1995
Table 2 Classification of micro-mineralization types
Mineral types
Volume percentage of minerals in coal, %
20～60
20～60
20～60
5～20
Two or more minerals
20～<60 (without sulfide)
>5～<45 (with sulfide: 5)
>10～<30 (with sulfide: 10)
Micro-mineral type is the general term for substances in coal whose volume percentage of minerals is greater than or equal to the upper limit of Table 2. According to different mineral types, it can be divided into micro-argillaceous type, micro-siliceous type, micro-carbonate type, micro-sulfide type and micro-complex mineral type. Additional remarks:
This standard is proposed by the Ministry of Coal Industry of the People's Republic of China. This standard is under the jurisdiction of the National Coal Standardization Technical Committee. This standard was drafted by the Xi'an Branch of the China Coal Research Institute, the Beijing Graduate School of China University of Mining and Technology, China University of Geosciences (Beijing), the Southern Coal Testing Center of the Ministry of Geology and Mineral Resources, and the Laboratory of the Shanxi Coalfield Geology Bureau. The main drafters of this standard are Zhang Xiuyi, Jin Kuili, Pan Zhigui, He Peishou, Ge Yintang, Lu Jie, and Xiao Wenzhao. This standard is entrusted to the Xi'an Branch of the China Coal Research Institute for interpretation. 170
1 Preface
Preparation Instructions for Microscopic Coal and Rock Type Classification (GB/T15589-1995) (Xiao Wenzhao, Xi'an Branch of the China Coal Research Institute) Microscopic coal province type classification is the basis for microscopic coal and rock type analysis. Coal and rock workers used to refer to the former Soviet Union or internationally commonly used classification schemes, but they have great differences in classification principles and methods, which brings great difficulties to application. For this purpose, the National Bureau of Standards entrusted the Standardization Department of the Ministry of Coal Industry to issue the task of formulating the national standard "Classification of Microscopic Coal Rock Types" in 1985, which was officially launched from 1986 to 1988. The drafting units included: Xi'an Branch of China Coal Research Institute, Beijing Graduate School of China University of Mining and Technology, China University of Geosciences (Beijing), Southern Coal Testing Center of the Ministry of Geology and Mineral Resources, and Laboratory of Shanxi Coalfield Geology Bureau. The Xi'an Branch of China Coal Research Institute was responsible for the funding. It was issued on June 12, 1995 and implemented on February 1, 1996. 2 Classification principles
When formulating the national standard for classification of microscopic coal rock types, reference was made to IS07404/11984 (E) Bituminous and Anthracite Coal Rock Analysis Methods Part I: Terminology of Bituminous and Anthracite Coal Rock Analysis, and the classification principles of this international standard were adopted, namely: the principles of 50μm and 5%, which are two important provisions for classifying microscopic coal types. The "50μm\ principle" stipulates that the minimum width for classification of microscopic coal rock types is 50μm. For example, on the polished surface of coal on a vertical plane, the minimum division thickness is 50μm, or the minimum area is 50μm×50μm, before it can be recorded as a microscopic coal rock type; the so-called "5% principle" stipulates that microscopic components that account for less than 5% of the component combination shall not be calculated. The 5% principle is proposed by the following fact, that is, whether it is a single-component or a two-component microscopic coal rock type, it is not completely composed of one or two groups of microscopic components. According to this provision, a single-component or two-component microscopic coal rock type may contain up to 5% of minor components that are atypical by definition. For example, the single-component microscopic coal rock type "microscopic coal" must contain no less than 95% vitrinite, and no more than 5% of extinctite and (or) chrysinite. This standard adopts The classification scheme of microscopic components is the internationally used HeerlenStopes classification scheme, that is, the organic microscopic components are divided into three major groups: vitrinite, chrysinite, and exinite. 3 Explanation of clauses
3.14 Classification of microscopic coal rock types·
It is the core part of the standard and appears in the form of a table in the text of the standard. Microscopic coal rock types are divided according to the type and number of microscopic component groups (see Table 1).
Microscopic coal rock type
Single-group grouping type
Two-group grouping type
Three-group grouping type
Microscopic coal
Micro-shell coal
Micro-inert coal
Micro-bright coal
Micro-dark coal
Micro-inert coal
Micro-triple coal
Microscopic coal rock type Type classification
Volume percentage of microscopic component group
Vitrinite>95
Sheathinite95
Inertinite>95
Vitrinite+Sheathinite》95
Inertinite+Sheathinite》95
Vitrinite+Inertinite95
Vitrinite+Sheathinite+Inertinite≥95
a) If the content of a certain microscopic component group exceeds 95%, it is a "single-component grouping type", which includes micro-mirrorite, micro-shell coal and micro-inertinite, representing three situations where the content of vitrinite, inertinite or inertinite is greater than 95% respectively. b) When there are two microscopic component groups greater than 5% and the total volume content of the two microscopic component groups is greater than 95%, it is a "two-component 537
group type", and this category also has three situations: micro-brightness Coal, slightly dark coal and microscopically inert coal. c) When the volume percentage of the three microscopic component groups is greater than 5% and the total volume content is greater than 95%, it is micro-triple coal. When classifying microscopic coal rock types, it can be further divided into several subtypes according to the microscopic components and their contents according to work needs. For example, slightly bright coal can be further divided into "micro bark bright coal", "micro spore bright coal", etc. according to the different types of exosomes. The last three types of microscopic coal rock types in Table 1 (i.e. slightly dark coal, microscopically inert coal, and micro-triple coal) can also be further divided into two parts according to the relative content of inertinite and vitrinite (or exosome), vitrinite and vitrinite + vitrinite according to the relative content of microscopic component groups; for example, microscopically inert coal with a vitrinite content greater than that of inertinite can be called "microscopically inert coal V", otherwise it can be called "microscopically inert coal I", which is very important for studying coal phases, coking production, etc. 3.25 Classification of micro-mineralization types ·
According to the types and quantities of inorganic matter (minerals) in coal, it is divided into 5 types of micro-mineralization types (see Table 2). Table 2 Classification of micro-mineralization types
Micro-mineralization types
Micro-mud coal
Micro-siliceous coal
Micro-carbonate coal
Micro-sulfide coal
Micro-complex mineral coal
CarbonatebzxZ.net
Sulfide
Two or more minerals
Volume percentage of minerals in micro-types
20～<60
20～<60
20～60
5～20
20～<60 (excluding sulfide)
> 5～<45(sulfide is 5)
>10～<30(sulfide is 10)
For technological considerations, the classification of coal and mineral combinations in coal processing is based on density grade sorting. First, coal and shale (density is 1.5g/cm2) are separated, and then shale and shale (density is 2.0g/cm2) are separated. Coal with an average density of <1.5g/cm2 is "micro coal rock type". The combination of coal and minerals with a density of 1.5-2.0g/cm is "micro mineralization type". Micro mineralization types can be subdivided into 5 categories according to the types of minerals associated with coal. Since the densities of clay minerals, quartz and carbonates are very similar, an average content of 20% of these three main minerals results in an average density of 1.5g/cm, while a proportion of 60% increases the density to 2.0g/cm. Therefore, the volume percentage content of these three minerals in Table 2 ranges from 20% to 60%. If the coal is mixed with 5% and 20% (by volume) of sulfide (which is pyrite), its density is sufficient to make the density of its material reach 1.5g/cm2 and 2.0g/cm2 respectively. If more than one mineral coexists with the microscopic component within an area of ​​50um×50pm, it is called "micro-complex mineral coal". 3.36 Micro-mineral type ·
According to the reasons stated in Article 2 above, when the volume percentage of minerals in the coal is greater than or equal to the upper limit specified in Table 2, it is a micro-mineral type. Micro-mineral types can also be divided into micro-argillaceous type, micro-siliceous type, micro-carbonate type, micro-sulfide type and micro-complex mineral type according to the type of mineral. In actual operation, due to the small content of micro-mineral types, they are generally not subdivided. 538
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