Analysis of the process of coal micronization conducted in order to obtain coal-water liquids / A. Staroń, Z. Kowalski, M. Banach // Acta Physica Polonica A [Dokument elektroniczny]. – 2014, Vol. 126, ... więcej

Analysis of the process of coal micronization conducted in order to obtain coal-water liquids / A. Staroń, Z. Kowalski, M. Banach // Acta Physica Polonica A [Dokument elektroniczny]. – 2014, Vol. 126, No. 4, s. 1025-1028 : fot., tab. – Tryb dostępu: http://przyrbwn.icm.edu.pl/APP/PDF/126/a126z4p37.pdf. – Bibliogr. 17 poz., Streszcz. ang. – Tyt. numeru: Proceedings of the 8th International Conference on Mechanochemistry and Mechanical Alloying, Kraków, Poland, June 22-26, 2014. – doi: 10.12693/APhysPolA.126.1025. – ISSN 1898-794X

Coal is the most important energy source, but its application in traditional way causes pollution. Preparation of coal-water liquids consists of: initial crushing of coal, wet milling in mixer mill and ... więcej

Coal is the most important energy source, but its application in traditional way causes pollution. Preparation of coal-water liquids consists of: initial crushing of coal, wet milling in mixer mill and homogenization. To obtain coal-water liquids there were used three kinds of materials: coal of medium assortment with a low content of ash (6-25 mm), fine coal (0-20 mm) and coal sludge. The parameters of the grinding process which results in coal-water suspensions characterized by the most advantageous functional properties (high stability, low density and viscosity and the smallest equivalent diameter of particles of coal in a slurry) have been chosen and the influence of additives on the listed properties of the suspensions was determined. For suspensions consisted of water and coal independent parameters were vibration frequency 30 1/s, one ball with diameter of 15 mm and amount of water: 70 wt%. Substances which were applied to improve the properties of coal-water suspensions were: Triton X-405, sodium carboxymethyl cellulose and poly(acrylic acid), partial sodium salt-graft-poly(ethylene oxide). The best stability, low viscosity and the lowest density of the suspensions were characterized by coal, water and 0.1 wt% of carboxymethyl cellulose as a result of the 30 min milling.