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Classification of Coal by Rank (ASTM D388-12) - CKIC

Classification of Coal by Rank (ASTM D388-12) 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% Non-agglomerating: Anthracite: 92 to 98%: 2 to 8% Semi-Anthracite (Lean Coal) 86 to 92%: 8 to 14% Bituminous

Coal Rank Classification Equipments

Coal Rank Classification Equipments KY Coal Facts Types of Mining Kentucky Coal Education In surface mining the use of large mining equipment maximizes the recovery through the excavation of one or more coal underground mines (of various entry types

Coal Rank - an overview | ScienceDirect Topics

This classification introduces three equal groups of classification: coal rank degreeas a result of action on the organic sediment of geological time (lignite, sub-bituminous coal, the facial type of the sediment expressing the influence of transformations on organic material (aerobic decomposition, anaerobic decomposition in dry or wet conditions)determined on the basis of macerals composition and

Classification Of Coal Mining Equipment -

Coal Rank,Coal Types,Coal Classification,Bituminous coals Crusher Coal Rank. The degree of metamorphisrn or coalification undergone by a coal , as it matures from peat to anthracite, has an important bearing.

Coal Rank Classification | Springer for Research &

09-06-2016· The rank of a coal is characteristic of the stage reached by it in course of coalification. The development from peat through the stages of lignite, subbituminous, and bituminous coals to anthracite and meta-anthracite is termed coalification. Coalification or coal metamorphism is a function of heat and pressure acting over a period of time.

Coal Rank - an overview | ScienceDirect Topics

The ASTM coal rank classification is based on a number of parameters obtained by various prescribed tests, which include calorific or heating value, volatile matter, moisture, ash, and fixed carbon (Figure 4.10). Calorific or heating value of coal is defined as heat energy released as it undergoes complete combustion with oxygen.

ASTM D388 - 19a Standard Classification of Coals by Rank

Abstract. This specification covers the classification of coals by rank, that is, according to their degree of metamorphism, or progressive alteration, in the natural series from lignite to anthracite. These coals are mainly composed of vitrinite. The classification shall be based on gradational properties that depend on the degree of metamorphism.

coal classification | Types & Facts | Britannica

In general, the calorific (heat) value of coal increases with rank from lignite through bituminous coal. In addition, the terms used for various coal ranks vary from country to country. Coal may be classified in rock types (or lithotypes) based on the presence of petrological components known as macerals. Based on maceral content and its appearance in a hand specimen, coal is classified into four principal types:

Classification of Coal - Engineering ToolBox

Anthracite Coal : 50 - 58 (lb/ft 3), 800 - 929 (kg/m 3) Bituminous Coal : 42 - 57 (lb/ft 3), 673 - 913 (kg/m 3) Lignite Coal : 40 - 54 (lb/ft 3), 641 - 865 (kg/m 3) Typical Ash Content in Coal. Anthracite Coal : 9.7 - 20.2 weight % Bituminous Coal : 3.3-11.7 weight % Lignite Coal : 4.2 weight %

What are the types of coal? - USGS

Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite.

Coal Rank - an overview | ScienceDirect Topics

Coal rank is a measure of coal maturity and is the most fundamental parameter that relates both to the coalification history and the utilisation potential of a coal. Figure 14.3 shows the change in coal chemical and physical properties with rank from bituminous to anthracite coals (Teichmuller and Teichmuller, 1975).As the rank increases, the vitrinite reflectance, carbon content, and C/H

Coal Rank Classification | SpringerLink

Rank or maturity of coal indicates its coalification stage which can be determined by reflectance measurement studies of vitrinite (Ro%), estimation of moisture, volatile matter, and carbon hydrogen content. Fundamental and technological properties of coal depend primarily on the rank of coal.

5.2.5 Gasifiers and Impact of Coal Rank and Coal

The available commercial gasification technologies are often optimized for a particular rank of coal or coal properties, and in some cases, certain ranks of coal might be unsuitable for utilization in a given gasification technology. On the other hand, there is considerable flexibility in most of the common gasifiers; this is highlighted by the following table, which provides an overview of

ASTM D388 - 19a Standard Classification of Coals by Rank

Note 1: Coals rich in inertinite or liptinite (exinite), or both, cannot be properly classified because, in those macerals, the properties that determine rank (calorific value, volatile matter, and agglomerating character) differ greatly from those of vitrinite in the same coal. Often, such coals can be recognized by megascopic examination. In North America, these coals are mostly nonbanded

Classification of Coal - EOLSS

classification of coals for all ranks, which provides a simple system for the international comparison of coal in terms of some key characteristics, and categorizes coals descriptively in terms of estimates of world and regional coal resources. A committee draft of Classification of Coals has been drafted for discussion (see first Document

ASTM D388 - Standard Classification of Coals by Rank

This standard covers the classification of coals by rank, that is, according to their degree of metamorphism, or progressive alteration, in the natural series from lignite to anthracite. This classification is applicable to coals that are composed mainly of vitrinite.

Chapter C The National Coal Resource Assessment An

Diagram showing classification of coals by rank in the United States.....12. Tables. 1. Common minerals found but affect the use and efficiency of coal-burning equipment. For example, certain constituents in coal may cause severe erosion and corrosion of,


COAL CLASSIFICATION BY RANK COMPARISON The coal classification employed in Canada is the ASTM ranking system that is based on the fixed carbon, and calorific value on the dry mineral matter free basis (dmmf). This system was adopted in 1938 and is a general guideline to classify different coal ranks.

Coal classification - SlideShare

Rogers classification: in 1858 he divided coals into 4 groups on basis of %age V, M,Ash. 14. CLASSIFICATION BASED ON PROXIMATE ANALYSIS 2. Frazers classification: In 1877, he used fuel ratio to classify coal as given: Coals of lower rank than bituminous were not considered Study was on only Pennsylvania coal.

Coal Sampling and Analysis Standards

Coal Centre Coal sampling and analysis standards 4 Abstract Each year, billions of tonnes of coal are traded in regional and international market for use in power generation, steel and cement making, and many other purposes. In commercial operations, the price of coal