Abstract
Froth flotation is the most widely used method for beneficiation of fine coals. In flotation, the size of air bubbles is an important factor affecting the separation efficiency. The size of air bubbles generated by passing air through a bubble diffuser/sparger can be reduced by changing the air flow pattern from steady to oscillatory. In the present work, coal flotation with oscillatory air supply generated by a fluidic oscillator was investigated and the results were compared with those obtained with steady air flow. The flotation tests were carried out at semi-continuous mode using a laboratory-scale flotation column. The results suggest that use of the fluidic oscillator can lead to substantial reagent cost savings and help improve coal flotation efficiency. Further experiments were carried out to fundamentally understand the effect of different air flow patterns on the flotation performance. Compared to steady air flow, oscillatory air flow results in better gas dispersion, higher gas holdup, higher foam stability, and less axial mixing of fluid inside the flotation column.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
