Connect With Us

[email protected]

Call Us

0086-21-58386256

index of coal

Home index of coal

globalCOAL - NEWC Index

The NEWC Index is the main price reference for physical coal contracts in Asia. The NEWC Index is the settlement price for a significant volume of index-linked contracts – from Australia and Indonesia to Japan and India. The NEWC Index prices the vast majority of coal derivatives in Asia, with some 350+ million tonnes of gC ICE Newcastle ...

Read More

Coal and the environment - U.S. Energy Information ...

Dec 01, 2020· Coal is an abundant fuel source that is relatively inexpensive to produce and convert to useful energy. However, producing and using coal affects the environment. Effects of coal mining. Surface mines (sometimes called strip mines) were the source of about 62% of the coal mined

Read More

1.3 Properties of Coal - ResearchGate

incombustible gases like carbon dioxide and nitrogen found in coal. Thus the volatile matter is an index of the gaseous fuels present. Typical range of volatile matter is 20 to

Read More

Vitrinite reflectance, Coal Analysis, Kentucky Geological ...

Oct 07, 2019· Vitrinite reflectance (Ro) Vitrinite reflectance is the proportion of incident light reflected from a polished vitrinite surface. Vitrinite is a maceral (an organic component) of coal. As vitrinite is heated in the earth during burial, it systematically changes its reflective properties. These changes are caused by increasing condensation of ...

Read More

Slagging and Fouling Indices - Coal Tech

Slagging Index, EC where max HT is the highest value of the hemisphere ash fusion temperature under reducing or oxidising conditions and min IT is the lowest initial deformation temperature under reducing or oxidising conditions >1340 1340 to 1230 1230 to 1150 <1150 Silica Percentage 72- 80 65- 72 50- 65

Read More

Gray King Assay and Swelling Index of a coal is a

Gray King Assay and Swelling Index of a coal is a measure of its a) Swelling characteristics b) Abradability c) Agglutinating properties d) Resistance to impact breakage

Read More

Coal Free-Swelling Index Testing

Feb 03, 2021· The free-swelling index gives supplementary information on the plastic properties of coals. It should not be used to evaluate the expansion properties of coals to be used in coke ovens. The ASTM method for determining the free-swelling index uses a 1-gram coal sample. The need for a smaller scale test arises when only a limited supply of coal ...

Read More

Argus/'s Coal Price Index Service | Argus Media

This service provides reliable, accurate index prices and historical data for international physical and derivative coal markets. These indexes are trusted and used by coal professionals around the globe, with more than 85pc of the world's traded coal derivatives using the API 2 and API 4 indexes. Markets covered. Northwest Europe: API 2

Read More

Coal | 2008-2021 Data | 2022-2023 Forecast | Price | Quote ...

Coal futures remained near $150 a tonne, the highest level in a decade as a heat wave in Zhejiang, Jiangsu and Guangdong, China's biggest industrial provinces has pushed the electricity consumption to unprecedented levels. Meanwhile, local supply remains limited as drought knocked hydropower generation in Yunnan province, output restrictions remain in place in Shanxi production hubs amid ...

Read More

Outburst sensitive index of No.3 coal seam in Xinjing Mine ...

Outburst sensitive index of No.3 coal seam in Xinjing Mine. Coal and gas often extrudes when excavateing the No.3 coal seam in Xinjing mine, which threatens the safety of production and economic benefits. The main contents can be summarized as follows: geological structure, coal block texture, burial depth, gas pressure, gas content ...

Read More

A PRELIMINARY COMPARISON OF COAL CLASSIFICATION …

index (GR.I.), and the maximum plastic layer thickness (Y) mainly employed in China. It has been observed that the log of the maximum fluidity has a stronger correlation with the caking index than the Y values. Metallurgical coal processing strategy and typical coking coal product qualities are briefly discussed in the last section of this paper.

Read More

Significance and application of the caking index of coal ...

Feb 01, 1989· The Caking Index, G, has been widely popularized and applied in coal geological exploration, production and utilization departments in China. This index was established after improving the Roga Index, an international method used for determining the caking power of bituminous coal.

Read More

IS 1353 (1993): Methods of test for coal carbonization ...

coal. This is the agglutinating index or caking index. It is understood that this method provides only an approximate measure of the tendency of a coal to agglutinate or to produce a lump from powder. To ensure reliable comparison, it is necessary that comparative tests between different operators should ...

Read More

Coal imports and exports - U.S. Energy Information ...

May 27, 2021· For example, coal-burning power plants along the Gulf Coast and the Atlantic Ocean sometimes find it cheaper to import coal from other countries than to obtain coal from U.S. coal-producing regions. U.S. total annual coal imports reached …

Read More

Comprehensive index evaluation of the spontaneous ...

May 01, 2021· A microscopic study of coal found that during the low-temperature oxidation process of coal, the molecular structure of low-rank coal is not as stable as that of high-rank coal and the active groups are easily oxidised, which consumes more oxygen and releases more index gases.

Read More

Grindability - an overview | ScienceDirect Topics

Grindability index is a measure of the ease of grinding of a given feed. Utility industries use the Hardgrove grindability index (HGI) to express this parameter. In the direct cofired system, the existing mills designed for coal are used for grinding the cofired biomass. So for a given mill, given rotation, and energy input, it is necessary to ...

Read More

Coal (ICI 4) Indonesian Coal Index (Argus/Coalindo) Quotes ...

Jul 15, 2021· Find information for Coal (ICI 4) Indonesian Coal Index (Argus/Coalindo) Quotes provided by CME Group. View Quotes

Read More

Optimization of Combustion Characteristics of Blended ...

The Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method is used to find optimal mixing scheme of Zhaotong lignite, Fuyuan bituminous coal, and Xiaolongtan lignite in terms of combustion performance. Comparative evaluation of different mixing schemes is also conducted, where the flammability index, comprehensive combustion characteristic index, burnout temperature ...

Read More

Analysis of Index Gases of Coal Spontaneous Combustion ...

Analysis of the index gases of coal for the prevention of spontaneous combustion is of great importance for the enhancement of coal mine safety. In this work, Fourier Transform Infrared Spectrometer (FTIRS) is presented to be used to analyze the index gases of coal in real time to monitor spontaneous combustion conditions. Both the instrument parameters and the analysis method are introduced ...

Read More

National Coal Index 2021: Key Points - UPSC Notes

Feb 12, 2021· National Coal Index: The Ministry of Coal has started the commercial auction of coal mines on a revenue share basis using the National Coal Index (NCI). Key Points. It is a price index that reflects the change of price level of coal in a particular month relative to the fixed base year. The base year for the NCI is Financial Year 2017-18.

Read More

Coal, Bituminous Safety Data Sheet

Coal, Bituminous Page 4 of 4 Revised: 08/21/2018 Replaces: 06/15/2018 Printed: 08-25-2018 The information provided in this (Material) Safety Data Sheet represents a compilation of data drawn directly from various sources available to us.

Read More

Coal | S&P Global Platts

Platts Market Data - Coal. Understand the market value of coal in regional and global markets as well as how supply and demand fundamentals are impacting price. Learn More. Americas, North America.

Read More

Weekly Coal Index Report

1 · Weekly Coal Index Report. South Africa's Eskom has presented its decarbonisation plans going forward, which sees gas, solar and wind as preferred future technologies, assisted by micro grids and ...

Read More

ISO 15585:2006(en), Hard coal ? Determination of caking index

1 Scope. This International Standard specifies a method of determination of caking index of hard coal. It is applicable to the evaluation of caking power of bituminous coal with random reflectance of vitrinite, Rr, greater than 0,6 % and less than or equal to 1,8 % (> 0,6 % ≤ 1,8 %).

Read More

Standard Test Method for Free-Swelling Index of Coal

1. Scope. 1.1 This test method 2 is a small-scale test for obtaining information regarding the free-swelling properties of a coal. The results may be used as an indication of the caking characteristic of the coal when burned as a fuel. This test is not recommended as a method for the determination of expansion of coals in coke ovens.

Read More

Standard Test Method for Free-Swelling Index of Coal

1.1 This test method 2 is a small-scale test for obtaining information regarding the free-swelling properties of a coal. The results may be used as an indication of the caking characteristic of the coal when burned as a fuel. This test is not recommended as a method for the …

Read More

Hardgrove Grindability, Coal Analysis, Kentucky Geological ...

Oct 07, 2019· The results are compared against a standard sample to provide the index and used to determine how much energy and expense will be needed to grind down a certain coal for a particular use (ASTM method D409-12; American Society for Testing and Materials, 2013, p. 397–411). The HGI is on a scale from 30 to 100.

Read More

An Analytical Model of Coal Abrasiveness Index in Function ...

Keywords— Abrasiveness index, is caused by the mineral inclusions, then the relative hardness Coal, Modelling. I. INTRODUCTION ASTLY, the characterization of the abrasiveness index (AI) for coal used in the South African power generation industry became a cause for concern due to lack of standardization of test results. The standardization of

Read More

Standard method of test for index of dustiness of coal and ...

@article{osti_7357888, title = {Standard method of test for index of dustiness of coal and coke}, author = {}, abstractNote = {An empirical method is described for measuring the dust produced when handling coal and coke. A special apparatus is described in which the sample of coal or coke is placed on a slide near the top of a closed apparatus.

Read More

Australia Coal Price - YCharts

Jul 06, 2021· The Australia Coal Price measures the price in US Dollars of one metric ton. Coal is the largest energy resource for Australia, which is why it is an important commodity to track. Historically, coal prices in Australia have been effected by floods. A large notable peak occurred in 2008, when floods ...

Read More