Effect of particle size on flotation performance of hematite
Ximei Luo 1, 2  
,   Shuixiang Song 1, 2,   Mingze Ma 1, 2,   Yunfan Wang 3,   Yongfeng Zhou 1, 2,   Ying Zhang 1, 2
 
More details
Hide details
1
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
2
Faculty of Land and Rescource Engineering, Kunming University of Science and Technology, Kunming 650093, China
3
Faculty of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
CORRESPONDING AUTHOR
Ximei Luo   

Kunming University of Science and Technology, Faculty of Land and Rescource Engineering, Kunming University of Science and Technology, Kunming, 650093 Kunming, China
 
Physicochem. Probl. Miner. Process. 2019;55(2):479–493
 
KEYWORDS
TOPICS
ABSTRACT
The effect of particle size on flotation performance of hematite and quartz was investigated. Microflotation, X-ray photoelectron spectroscopy analysis, reagent adsorption measurements, and collision and attachment probability calculation between particle and bubble were conducted in this investigation. The results showed that the floatability of minerals with different particle size fractions was different, which was mainly related to surface bonding site, reagent adsorption, collision probability and entrainment. The quartz with different particle size had little impact on hematite recovery, but -45 μm fraction negatively affected Fe grade of concentrate both in the direct and reverse flotation of hematite. In the direct flotation, the Fe grade in froth product dropped off due to the fine quartz entrainment. While in the reverse flotation, the Fe grade in sink product dropped off as a result of difficulty in floating fine quartz particles, which was due to lower collision probability. Meanwhile, in the reverse flotation, the presence of hematite fines (-18 μm fraction) also had negative impact on hematite recovery because of fine particle entrainment.
eISSN:2084-4735
ISSN:1643-1049