E3S Web Conf.
Volume 41, 2018IIIrd International Innovative Mining Symposium
|Number of page(s)||6|
|Section||Environment Saving Mining Technologies|
|Published online||26 June 2018|
Use of Ash-and-Slag Wastes after Burning of Fine-Dispersed Coal-Washing Wastes
T.F. Gorbachev Kuzbass State Technical University,
650000 28 Vesennya st.,
2 FSBEI HE "Krasnoyarsk SAU", Power Systems Department, 660130 Stasovoy St., Krasnoyarsk, Russian Federation
* Corresponding author: email@example.com
Effective utilization of ash-and-slag waste generated by coalfired power plants can help significantly to reduce the negative impact on the environment and improve their economic performance. Studies have been made of the mineralogical composition of ash-and-slag wastes obtained after the combustion of water-coal fuel based on fine-dispersed coal-washing waste (filter cake) in a specially designed boiler with a vortex combustion system. The possibility of effective use of ash-and-slag wastes for the production of building materials, primarily mortar mixes, widely used for mining works on mine openings, laying the worked out space, etc. (high content of silicon oxide and aluminum oxide is combined with a low carbon content in other words a negligible unburned carbon loss). The optimum percentage ratio of the initial components of the filling mixture based on ash-and-slag wastes and crushed rock (granulated slag) has been established. The results of experimental tests of hardening tabs on the strength under uniaxial compression are presented. It has been established that a sample containing 18% of ash-and-slag wastes, 33% of a granulated slag and 19% of cement, corresponds to the required technological parameters for the strength and cement content.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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