Experimental Investigation of the Attachment Performance between Coal Particle and Bubble

Qiming Zhuo; Wenli Liu; Hongxiang Xu; He Zhang; Xiaopeng Sun

doi:10.1021/acsomega.0c04093

Experimental Investigation of the Attachment Performance between Coal Particle and Bubble

ACS Omega. 2021 Mar 18;6(12):7979-7987. doi: 10.1021/acsomega.0c04093. eCollection 2021 Mar 30.

Authors

Qiming Zhuo^{1

2

3}, Wenli Liu¹, Hongxiang Xu¹, He Zhang⁴, Xiaopeng Sun¹

Affiliations

¹ School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
² State Key Laboratory of Mineral Processing, Beijing General Research Institute of Mining & Metallurgy, Beijing 102600, China.
³ College of Geoscience and Survey Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
⁴ School of Mining Engineering, Heilongjiang University of Science and Technology, Heilongjiang 150080, China.

Abstract

Attachment behavior is a key component of flotation and has a decisive influence on flotation performance, and the experiment research on the attachment between mineral particles and bubbles still needs further research. In this work, a particle-bubble attachment apparatus and multiple target tracking software were developed. Coal particles were used as the subjects, and the effect of particle properties on the attachment performance was studied from the perspective of the particle group. The particle-bubble attachment experiments indicated that the collision position had an effect on the attachment efficiency, and the attachment efficiency decreased with an increase in the collision angle. The efficiency-weighted attachment angle was proposed to quantitatively describe the attachment performance of coal samples. The efficiency-weighted attachment angle of low-density coal samples was greater than that of high-density coal samples. For particles with different sizes, the efficiency-weighted attachment angle of fine particles was greater than that of coarse particles. Furthermore, SDS weakened the attachment performance between coal particles and bubbles via adsorption on the bubble, and the efficiency-weighted attachment angle decreased as the concentration of the SDS solution increased. CTAB adsorbed on coal particles and bubbles, and the efficiency-weighted attachment angle first increased and then decreased with increasing CTAB concentration.