Reverse flotation desilication is an indispensable step for obtaining high-grade fluorapatite. In this work, dodecyltrimethylammoni-um bromide (DTAB) is recommended as an efficient collector for the reverse flotation separation of quartz from fluorapatite. Its collectivity for quartz and selectivity for fluorapatite were also compared with figures corresponding to the conventional collector dodecylamine hydrochlor-ide (DAC) via microflotation experiments. The adsorption behaviors of DTAB and DAC on minerals were systematically investigated with surface chemical analyses, such as contact angle determination, zeta potential detection, and adsorption density measurement. The results re-vealed that compared to DAC, DTAB displayed a similar and strong collectivity for quartz, and it showed a better selectivity (or worse col-lectivity) for fluorapatite, resulting in a high-efficiency separation of the two minerals. The surface chemical analysis results showed that the adsorption ability of DTAB on the quartz surface was as strong as that of DAC, whereas the adsorption amount of DTAB on the fluorapatite surface was much lower than that of DAC, which is associated with the flotation performance. During the floatation separation of the actual ore, 8wt％ fluorapatite with a higher grade can be obtained using DTAB in contrast to DAC. Therefore, DTAB is a promising collector for the high-efficiency purification and sustainable utilization of valuable fluorapatite recourses.

Wenbiao Liu;Wenxuan Huang;Feng Rao;Zhanglei Zhu;Yongming Zheng;Shuming Wen

Faculty of Land and Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China;R&D center,Yunnan Yuntianhua Co.,Ltd.,Kunming 650228,China;School of Zijin Mining,Fuzhou University,Fuzhou 350108,China;College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China

矿物冶金与材料学报

[1]Wenbiao Liu;Wenxuan Huang;Feng Rao;Zhanglei Zhu;Yongming Zheng;Shuming Wen-.Utilization of DTAB as a collector for the reverse flotation separation of quartz from fluorapatite)[J].矿物冶金与材料学报,2022(03):446-454

fluorapatite,desilication,dodecyltrimethylammoni,collectivity,dodecylamine,hydrochlor,microflotation,floatation,recourses

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