Utilization of ultrasonic atomization for dust control in underground mining

Abstract

This study examined dust suppression using water particles generated by ultrasonic atomization (2.4 MHz) at low temperature (10 °C). Green tuff (4 µm), green tuff (6 µm), kaolin, and silica were used as dust samples. Even though ultrasonic atomization makes fine water particles, raising relative air humidity immediately was difficult at low temperature. However, remaining water particles that did not change to water vapor contributed to suppression of dust dispersion. Additionally, the effect of water vapor amount (absolute humidity) and water particles generated by ultrasonic atomization on the amount of dust dispersion was investigated using experimental data at temperatures of 10, 20, and 30 °C. Utilization of ultrasound atomization at low temperature has the advantages of low humidity increments in the working space and water particles remaining stable even with low relative air humidity.

Piezoelectric atomization of liquids with dynamic viscosities up to 175 cP at room temperature

“…Most of ultrasonic atomizers operate in the piezoelectric driving mode, as this mode yields low energy consumption, high efficiency, simple structure, small atomized particles and low cost [2] , [3] , [4] , [5] . Therefore, ultrasonic atomizers are widely used in the aerospace and medical fields, engines, solid-state batteries, food, and environmental improvement and quality of life improvement applications [6] , [7] , [8] .…”

Effect of ultrafine bubbles on ethanol enrichment using ultrasonic atomization

“…[1][2][3] Ultrasonic atomization is generated owing to capillary waves on the liquid surface and ultrasonic cavitation [4][5][6] in the liquid. Ultrasonic atomization is applied to several fields such as humification, aroma diffusion, dust control, 7) and nanoparticle separation. 8) In 2001, Sato et al reported that ultrasonic atomization enriched ethanol from an aqueous solution.…”

Formation of jet atomization using a steel plate vibrated by weakly coupled ultrasonic transducer through water

“…© 2019 The Japan Society of Applied Physics Supplementary material for this article is available online A tomization using ultrasonic vibration has been performed for nearly 100 years; 1,2) however, the generation mechanism of atomization is a historical challenge that has not been elucidated completely, [3][4][5][6][7] and three hypotheses have been developed: surface wave theory, 2,8,9) cavitation theory, [10][11][12][13] and boiling theory. 6,7,14,15) The progress of atomization techniques is very rapid and diverse, and they are widely disseminated not only in industry [16][17][18][19][20] but also in daily life. 21,22) For example, J.…”