Affiliation:
1. National University of Science and Technology «MISiS»
Abstract
Issues on evaluation of coals ability to liberate airborne dust during transportation and transloading are nowadays relevantly current. In the current work, a new method was presented for evaluation of dust contents in coals. It is based on modeling of the processes of coals transloading and transportation. The essence is to stir coals sample of size <3mm at a constant rotation rate with a simultaneous passing a fixed volume of air through a filter system and determining the total airborne dust content and dust class sizes more or less than 10 microns. During the tests, a sample of commodity coal is used as a residue of a sieve analysis of the representative coal sample after the sieve of 3 mm. Experiments were held at two hard coals of the Kuznetsk coal basin differing in their metamorphism degree and petrographic composition. It was established that within the measurement error, the total amount of airborne dust able to be released during transloading for both the considered samples is comparable. On the other hand, the size classes distribution for dust particles over or less than 10 microns varies significantly and depends on the coals rank and petrographic composition. High inertinite contents determines, presumably, the increase of fine dust particles (less than 10 microns) in the total airborne dust released.
Subject
Industrial and Manufacturing Engineering,Geochemistry and Petrology,Geology,Geotechnical Engineering and Engineering Geology,Ecology
Reference22 articles.
1. Organiscak J.A., Page S. J. Airborne Dust Liberation During Coal Crushing // Coal Preparation. 2000. Vol. 21. No 5-6. Pp. 423-453. DOI: 10.1080/07349340108945630.
2. Organiscak J.A., Page S. J. Laboratory investigation of coal grindability and airborne respirable dust // Journal of the Mine Ventilation Society of South Africa. 1993. Vol. 46. No 7. Pp. 98-105.
3. Jiang H., Du C., Dong J. Investigation of rock cutting dust formation and suppression using water jets during mining // Powder Technology. 2017. Vol. 307. Pp. 99-108. DOI: 10.1016/j. powtec.2016.11.029.
4. Korshunov A. N., Dergunov D. M., Logov A. B., Gerike B. L. Coal cutting with a disk // Soviet Mining Science. 1975. Vol. 11. No 5. Pp. 571-573. DOI: 10.1007/BF02499387.
5. Chen S., Wang H., Li Y., Cui H., Zhao J., Zhang X. Theoretical and numerical analysis of coal dust separated by centrifugal force for working and heading faces // International Journal of Coal Science & Technology. 2014. Vol. 1. No 3. Pp. 338-345. DOI: 10.1007/s40789-014-0039-9.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献