1 Scope
This document specifies the classification of coal product varieties and coal quality index grades. This document applies to the products of anthracite, bituminous coal and lignite.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the reference documents, only the date of the corresponding version applies to this document; do not note the date of the reference documents, the latest version (including all the revision of the list) applies to this document.
GB/T 212 Industrial methods of analysis of coal
GB/T 213 Method for the determination of the heat content of coal
GB/T 214 Method for the determination of total sulphur in coal
GB/T 216 Determination of phosphorus in coal
GB/T 477 Test method for sieving of coal
GB/T 3058 Determination of arsenic in coal
GB/T 3558 Determination of chlorine in coal
GB/T 3715 Terminology related to coal quality and coal analysis
GB/T 4633 Determination of fluorine in coal
GB/T 16659 Determination of mercury in coal
GB/T 25214 Determination of total sulphur in coal by infrared spectrometry
GB/T 30732 Industrial methods of analysis of coal
MT/T 1 Determination of gangue rate and limiting rate in commercial coal
SN/T 3521 Simultaneous determination of arsenic and mercury in imported coals ﹑ Atomic fluorescence spectrometry with hydride generation
3 Terms and definitions
The terms and definitions defined in GB/T 3715 apply to this document.
4 Classification of particle size
Coal products can be divided into 12 categories according to their particle size, see Table 1.
5 Classification of varieties
Coal products are divided into national categories according to their use, processing methods and technical requirements, with 27 varieties. The categories of coal products, the names of varieties and technical requirements should be in accordance with the provisions of Table 2.
Table 2 coal acting product categories varieties and technical requirements
6 Product quality indicators of the division
6.1 Ash content (A,)
6.1.1 Fine coal
See Table 3 for the classification of ash content of fine coal products.
6.1.2 Other coal products
See Table 4 for the classification of ash content of other coal products.
Table 4 Ash classification of other coal sub-products
6.2 Sulphur (S.a)
See Table 5 for coal product sulphur classification.
Table 5 Classification of sulphur content of coal products
6.3 Calorific value (Qmt.w)
See Table 6 for coal product heat content classification.
Table 6 Coal product calorific rating
6.4 Limiting rate of lump coal
See Table 7 for the classification of lump coal limiting rates.
Table 7 Classification of lump coal limit rate
7 Test methods
7.1 Coal sieving shall be carried out in accordance with GB/T477.
7.2 Coal ash (Aq) is determined according to the methods specified in GB/T 212 or GB/T 30732, and the slow ashing method is carried out in accordance with GB/T 212 for arbitration.
7.3 Coal sulphur (S.s) is determined according to the method specified in GB/T214 or GB/T 25214, and the arbitration is carried out in accordance with the Esker method in GB/T214.
7.4 Coal calorific value (Q....) Determination according to the method specified in GB/T 213,
7.5 The limit down rate of lump coal is determined according to the method specified in MT/T1.
7.6 Determination of magnetic content in coal according to the method specified in GB/T 216.
7.7 The chlorine content of coal is determined according to the method specified in GB/T3558.
7.8 The arsenic content in coal is determined according to the method specified in GB/T 3058 or SN/T 3521.
7.9 The mercury content in coal is determined according to the method specified in GB/T 16659 or SN/T 3623.
7.10 The fluorine content in coal is determined according to the method specified in GB/T 4633.
1 Scope
2 Normative references
3 Terms and definitions
4 Classification of particle size
5 Classification of varieties
6 Product quality indicators of the division
7 Test methods
