Effect of Water on the Critical Surface Tension of Coal

DOI

10.2991/ic3me-15.2015.369How to use a DOI?

Keywords

Contact angle, Coal, Wetting, Critical surface tension

Abstract

In order to improve the effect of water injection and dust prevention in coal seam, the wetting process with water in coal was described in this paper. The coal surface tensions with six different aqueous solutions were measured and the contact angle of coal samples from Zhaozhuang Mine was tested. The critical surface tension of the coal samples studied was calculated using the Zisman method. The research indicates that the surface tension with suds is the lowest among the six different aqueous solutions. The average critical surface tension of coal samples from Zhaozhuang Mine is 17.15 mN/m. The water, which decreases the surface tension to below 17.15 mN/m, can make the coal fully wetted and fully expanded. For the water which makes the surface tension higher than 17.15 mN/m, the surface tension approaches this value and the wetting effect is better. The critical surface tension could be applied to evaluate the effect of the coal wetting with mine water.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jun Wang
PY  - 2015/08
DA  - 2015/08
TI  - Effect of Water on the Critical Surface Tension of Coal
BT  - Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering
PB  - Atlantis Press
SP  - 1912
EP  - 1916
SN  - 2352-5401
UR  - https://doi.org/10.2991/ic3me-15.2015.369
DO  - 10.2991/ic3me-15.2015.369
ID  - Wang2015/08
ER  -