首页|Ultrasound application in alkaline pretreatment process of spodumene to improve particle floatability

Ultrasound application in alkaline pretreatment process of spodumene to improve particle floatability

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Selective surface dissolution was found to be important in spodumene flotation. In this study, we pro-posed to introduce ultrasound into the pretreatment process to accelerate particle vibration and cavita-tion, as well as the migration of mineral surface components to solution. Micro-flotation results showed that the flotation recovery of spodumene can be 86.08％by ultrasound pretreatment, but only 39.30％by traditional mechanical agitation pretreatment. Compared with traditional mechanical agitation, ultrason-ic pretreatment can shorten the pretreatment process, reduce the dosage of agents, reduce the mechan-ical agitation speed, and improve the efficiency of the pretreating process. Inductively coupled plasma analysis showed that, in the ultrasonic system, the amount of Li, Al, and Si species in the solution was twice as much as those in the traditional preprocessing system. Moreover, the scanning electron micro-scope results demonstrated a larger surface dissolution area in the ultrasonic system. X-Ray photoelec-tron spectroscopy results showed that the atomic concentration of Si species on the spodumene surface decreased, whereas the relative atomic concentrations of Li and Al species increased, indicating that the ultrasound effect strengthened the selective dissolution of elements on the mineral surface. The high-resolution spectra of O 1s showed that more collectors are adsorbed on the mineral surface treated by ultrasonic pretreatment.

Ultrasonic pretreatmentSpodumeneFlotationSurface selective dissolution

Haoran Chu、Lanlan Chen、Dongfang Lu、Yuhua Wang、Xiayu Zheng、Guangli Zhu

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School of Minerals Processing and Bioengineering, Central South University, Changsha 410000, China

Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, China

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中国博士后科学基金中国博士后科学基金Postdoctoral Research Grant in Henan ProvinceState Key Laboratory of Mineral Processing and Coinnovation Center for Clean and Efficient Utilization of Strategic Metal Mi

2021YFC2903202519743665217426752174270520042502020M6801002020TQ0279202003025

2023

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCD北大核心EI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2023.33(7)
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