• Presenting an engineering classification system for coal ...

    For coal loss prevention, a measure is necessary for prediction of coal spontaneous combustion. In this study, a new engineering classification system called ‘‘Coal Spontaneous Combustion Potential Index (CSCPI)’’ is presented based on the Fuzzy Delphi Analytic Hierarchy Process (FDAHP) approach.

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  • Global Industry Classification Standard Wikipedia

    The Global Industry Classification Standard (GICS) is an industry taxonomy developed in 1999 by MSCI and Standard Poor's (SP) for use by the global financial community. The GICS structure consists of 11 sectors, 24 industry groups, 69 industries and 158 subindustries into which SP has categorized all major public system is similar to ICB (Industry Classification Benchmark ...

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  • Coal Trade an overview | ScienceDirect Topics

    The 1998 coal classification is based on three fundamental coal characteristics to be used in combination: coal rank (or degree of coalification), petrographic composition, and grade or amount of impurities (ash yield). Figure shows a scheme for the classification of inseam coals.

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  • Classification of Coal

    US standardized coal classification system. In Great Britain, Seyler published a system in 1899 which, after being extended and refined in 1931, and again in 1938, may still be regarded a masterpiece of scientific coal classification. Seyler’s system is entirely based

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  • Chapter 1 | Classification of Coals by Rank

    A discussion of the system used for classifying coals in the United States and the international systems of coal classification the ASTM International (previously the American Society for Testing and Materials) Standard D388, Classification of Coals by Rank [2], coals are classified according to their degree of metamorphism ( ...

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  • ISO ISO 11760:2005 Classification of coals

    ISO 11760:2005 describes a simple classification system for coals providing guidance on the selection of the appropriate ISO standard procedures for the analyses and testing, international comparison in terms of some key characteristics and descriptive categorization of coals.

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  • EXPLANATION OF RUSSIAN COAL CLASSIFICATION SYSTEM

    The system of coal classification which was devised by the United Nations Economic Commission for Europe is based partly on the British National Coal Board Code system and partly upon the ASTM coal classification. The parameters used are caking and coking properties for coals containing less than 33% of volatile matter, and calorific value for ...

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  • Coal Grades | Ministry of Coal, Government of India

    The gradation of noncoking coal is based on Gross Calorific Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per notification. Grades of Coking Coal. Grade: Ash Content:

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  • Circular 891 Coal Resource Classification System

    The classification system is designed to quantify the total amounts of coal in the ground before mining began (original resources) and after any mining (remaining resources). It is also designed to …

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  • Classification of Coal

    The background and historical development of coal classification are described in this section. The properties of coal (chemical, physical, mechanical, and petrographic) are used as classification parameters. Some of the properties of coal that are used in its evaluation for end use processes appear in a number of classification systems.

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  • A new coal mine floor rating system and its application to ...

    This paper introduces a new floor classification system, the Coal Mine Floor Rating, based on the underlying failure mechanisms. The new floor mass rating system quantifies the stability of floor strata by considering two main factors: uniaxial compressive strength and discontinuity spacing of the floor units.

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  • Classification of Coal by Rank (ASTM D38812)

    Classification of Coal by Rank (ASTM D38812) Coal Rank: Fix Carbon Limits: Volatile Content: Gross Calorific Value Limits: Agglomerating Characteristics % % Btu/lb: MJ/kg: dmmf: dmmf: Moisture mmf: moisture mmf: Antracite Class: Meta Anthracite ≥98% <2% Nonagglomerating: Anthracite: 92 to 98%: 2 to 8% SemiAnthracite (Lean Coal) 86 to 92% ...

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