The relationship between excluded mineral matter and the abrasion index of a coal

Predictions of the wear rates of components in grinding mills at pulverised coal-fired power stations are currently made using empirical relationships based on the ash content of the coals. However, modern coal characterisation techniques now allow the mineral inclusions in a coal that are responsib...

Full description

Saved in:
Bibliographic Details
Published in:Fuel (Guildford) 2004-02, Vol.83 (3), p.359-364
Main Authors: Wells, J.J., Wigley, F., Foster, D.J., Gibb, W.H., Williamson, J.
Format: Article
Language:English
Subjects:
Abrasion
Applied sciences
Coal and derived products
Coal milling
Coal minerals
Energy
Erosion
Exact sciences and technology
Fuels
Mechanical preparation
Processing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Predictions of the wear rates of components in grinding mills at pulverised coal-fired power stations are currently made using empirical relationships based on the ash content of the coals. However, modern coal characterisation techniques now allow the mineral inclusions in a coal that are responsible for the abrasive nature of the coal to be accurately characterised. Hence, there is scope to make improved predictions of wear based on a detailed knowledge of the mineral matter in a particular coal. It is first necessary, however, to understand the nature of the minerals and properties of the minerals in a coal that would contribute to abrasive wear. In this study known quantities of quartz, pyrite and slate have been added to a washed coal and the Abrasion Indices of the coal/mineral mixtures have been measured. The results show how the size, shape and hardness of excluded mineral matter contribute to the abrasive properties of a coal.
ISSN:0016-2361
1873-7153
DOI:10.1016/S0016-2361(03)00262-X