Investigation of the flotation behavior and interaction characteristics of micro-fine quartz and magnesite in a dodecylamine system under ultrasonic treatment--颗粒学报PARTICUOLOGY

Gong, X., Yao, J., Yin, W., Yu, J., Yang, B., & Wang, Y. (2024). Investigation of the flotation behavior and interaction characteristics of micro-fine quartz and magnesite in a dodecylamine system under ultrasonic treatment. Particuology, 94, 386-399. https://doi.org/10.1016/j.partic.2024.08.017

Investigation of the flotation behavior and interaction characteristics of micro-fine quartz and magnesite in a dodecylamine system under ultrasonic treatment

Xiufeng Gong^a, Jin Yao^{a b c *}, Wanzhong Yin^a *, Jianwei Yu^a, Bin Yang^d, Yulian Wang ^e *

a School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819, China
b State Key Laboratory of Mineral Processing, Beijing, 102628, China
c Key Laboratory of Solid Waste Treatment and Resource Utilization of the Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China
d School of Chemical Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China
e School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, China

10.1016/j.partic.2024.08.017

Volume 94, November 2024, Pages 386-399

Received 16 July 2024, Revised 19 August 2024, Accepted 25 August 2024, Available online 10 September 2024, Version of Record 26 September 2024.

E-mail: yaojin@mail.neu.edu.cn; yinwanzhong@mail.neu.edu.cn; ylwang0908@163.com

Highlights

• Ultrasonic treatment increases the surface roughness and active sites of magnesite and quartz.

• Ultrasonic treatment reduces the flotation recovery of magnesite and quartz in DDA system.

• Ultrasonic treatment enhances the mutual attraction energy between magnesite and fine quartz particles.

Abstract

Ultrasonic treatment, as an important surface modification method, profoundly affects the flotation behavior of minerals. This study examined the impact of ultrasonic treatment on the surface properties and flotation performance of magnesite and quartz in a dodecylamine (DDA) flotation system. Atomic force microscope detection results revealed that the surface roughness and roughness size of both magnesite and quartz increased after ultrasonic treatment. Flotation tests indicated that the recovery rates of magnesite and quartz were lower after ultrasonic treatment. At pH of 10 and DDA of 75 mg/L, ultrasonic treatment led to a 0.66%, 3.46%, and 0.33% decrease in the flotation recovery rates for three different magnesite particle sizes. Following ultrasonic processing, the flotation recovery rates for three different quartz particle sizes decreased by 8.48%, 30.76%, and 43.69%, in that order. X-ray photoelectron spectroscopy detection results showed an increased presence of characteristic Mg and Si sites on the surfaces of magnesite and quartz following ultrasonic treatment. DDA acted on the surfaces of the two minerals through electrostatic adsorption and hydrogen bonding adsorption and repelled the flotation of minerals owing to the same charge as characteristic sites, thereby reducing flotation recovery. Adsorption capacity tests and contact angle measurements demonstrated a decrease in DDA adsorption and contact angle on the surfaces of magnesite and quartz after ultrasonic treatment, explaining the reduced floatability. Extended Derjaguin–Landau–Verwey–Overbeek theoretical calculations indicated that before ultrasonic treatment, there was a repulsive energy between magnesite and fine-grained quartz particles. After ultrasonic treatment, the interaction energy between magnesite and fine quartz particles is mutual attraction.

Graphical abstract

Keywords

Ultrasonic treatment; Magnesite; Fine-grained quartz; Surface properties; Interaction energy

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