Article
Engineering, Chemical
Yan Wang, Donghui Wang, Longhua Xu, Kai Xue, Xi Zhang, Xinzhang Shi, Chang Liu, Jinping Meng
Summary: A novel oleate hydroxamic acid (OLHA) was synthesized and used as a collector for bastnaesite flotation. The results showed that OLHA achieved efficient separation of bastnaesite and barite under specific conditions.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Zhihao Guo, Sultan Ahmed Khoso, Jinggang Wang, Chenyang Zhang, Zhiyong Gao, Wei Sun, Mengjie Tian, Yuling Liu
Summary: This manuscript investigates the performance and interaction mechanism of 2-hydroxy-3-naphthyl hydmxamic acid (2-OH-3-NHA) and 1-hydroxy-2-naphthyl hydmxamic acid (1-OH-2-NHA) as flotation collectors for the separation of bastnaesite/fluorite. The results show the excellent selectivities of NHAs and the better selectivity of 1-OH-2-NHA than 2-OH-3-NHA. Zeta potential measurements and first-principles calculations provide insights into the adsorption behavior and selectivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Wengang Liu, Liang Lv, Yong Mao, Hao Duan, Tiebing Yue, Fei Cao
Summary: The flotation separation of bastnaesite from calcite is an important issue in mineral selection. This study found that the use of the new collector OIBHA can effectively achieve the separation of bastnaesite from calcite. The results of Fourier transform infrared, ζ potential measurements, and quantum chemical calculations revealed the selective adsorption mechanism of OIBHA.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Peng Liu, Zhihao Guo, Weidi Zhang, Mengjie Tian, Wei Sun
Summary: In this study, a novel hydroxamic acid NHOO was synthesized and used as a collector in bastnaesite flotation to address the challenges faced in the separation from associated gangue minerals like fluorite. The results showed that NHOO exhibited effective selectivity in neutral conditions, achieving a significant difference in recoveries between bastnaesite and fluorite during their separation. Zeta potential characterization, adsorption tests, and X-ray photoemission spectroscopy confirmed higher adsorption quantities of NHOO on bastnaesite surface compared to fluorite.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Applied
Sheng Chang, Mei Li, Kai Gao, Dongliang Zhang, Haijun Duan, Linlin Ma, Zheng Ruan
Summary: The study investigated the mechanism of phthalic acid as a dicarboxylic acid collector in the flotation separation of fluorite and rare earth minerals. Experimental data showed that phthalic acid could efficiently separate the two minerals under weakly acidic conditions. The adsorption mechanism analysis revealed the formation of stable polycyclic calcium phthalate complex on the surface of fluorite.
JOURNAL OF RARE EARTHS
(2022)
Article
Geochemistry & Geophysics
Xiang Yao, Xinyang Yu, Yuhui Zeng, Linghan Mao, Honghui Xie, Shanming Liu, Guichun He, Zhiqiang Huang, Haolin Wang, Zhilin Liu
Summary: This paper investigates the application of a new collector, phenylpropyl hydroxamic acid (PHA), for the separation of bastnaesite from calcite. The experimental results demonstrate that PHA exhibits good selectivity and collection performance. Various analyses reveal the chemical adsorption and reactions between PHA and bastnaesite, leading to changes in the surface properties of bastnaesite and improved hydrophobicity for easier flotation.
Article
Engineering, Chemical
Weiwei Wang, Erdou Li, Zhangkuang Peng, Chunlei Guo, Shaochun Hou, Qiang Li
Summary: In this study, an environmentally friendly depressant, dextrin hydrate (DH), was introduced for the flotation separation of bastnaesite from monazite. The results showed that the recovery of monazite decreased significantly in the presence of DH, while the recovery of bastnaesite only exhibited a slight reduction. The mechanism was found to be related to the adsorption of DH on the Ce sites of monazite, which had a strong effect on the subsequent adsorption of the collector on the surface of monazite.
MINERALS ENGINEERING
(2023)
Article
Chemistry, Applied
Hongli Fan, Xianglin Yang, Jing Qi, Guangyi Liu, Jingqin Qin
Summary: This study investigated the flotation performance of bastnaesite using three phosphate collectors, with DEHPA showing the best flotation recovery. The research also suggested that DEHPA likely reacts with the Ce(III) atoms of bastnaesite interface to generate Ce-O-P bonds, aiding in the enrichment of bastnaesite through flotation.
JOURNAL OF RARE EARTHS
(2021)
Article
Engineering, Chemical
Xinyu Zhu, Yang Huang, Yangge Zhu, Na Sun, Weiqing Wang
Summary: The selective inhibition mechanism of oxalic acid on common calcium-bearing gangue minerals in bastnaesite flotation was studied, showing that oxalic acid competes with H205 for the active site on the surface of the gangue minerals, reducing their surface hydrophobicity and inhibiting their floating. In this process, fluorite is more inhibited than calcite.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Lingyun Fei, Xin Ma, Hongyu Sun, Shuai Wang, Zhanfang Cao, Hong Zhong, Lanqing Deng
Summary: A novel Y structure multi-functional surfactant, DHBA, was developed for the flotation recovery of rhodochrosite. It exhibited excellent collecting ability and selectivity for rhodochrosite, and improved the surface hydrophobicity of rhodochrosite.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Runpeng Liao, Shuming Wen, Jian Liu, Shaojun Bai, Qicheng Feng
Summary: The escalating demand for zinc resources has positioned zinc oxide ore as a valuable supplementary resource for zinc supply. The study found that the use of the DDA-OHA combined collector significantly improved the recovery of smithsonite, and the chemical and physical adsorption of DDA and OHA were further verified.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Physical
Xiaoyu Cao, Xiaoping Huang, Jianxian Zeng, Rui Zhang, Hong Zhong, Zhanfang Cao
Summary: The role of the thioether (C-S-C) group in improving the flotation performance of benzo-hydroxamic acid (BHA) toward galena was studied. It was found that the incorporation of C-S-C group increased the functional groups, chelating ability and hydrophobicity of BHA, enhancing its flotation performance to galena. The adsorption mechanism analysis showed that the BTHA molecule anchored on the galena surface mainly through the reactions of the two O atoms originated from -C(=O)-NH-OH group and lead species forming a five-membered ring. The C-S-C group in BTHA molecule could donate its electrons to lead species on galena surface, facilitating the adsorption of BTHA.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Qingmin Nie, Tingsheng Qiu, Huashan Yan, Yonggai Li
Summary: In this study, an eco-friendly depressant polyepoxysuccinic acid (PESA) was used for the flotation separation of bastnaesite from fluorite. The results showed that PESA had a strong depression effect on fluorite while having a negligible impact on bastnaesite. The addition of PESA also impeded the adsorption of octyl hydroxamic acid (OHA) on fluorite surface, which confirmed the selective depressant effect of PESA.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Applied
Zhao Cao, Zeyu Cheng, Jieliang Wang, Yongdan Cao
Summary: This study investigates the effect of Ca2+ ions and sodium silicate individually or in combination on bastnaesite flotation. The results show that the combination of Ca2+ ions and sodium silicate more severely depresses bastnaesite due to their synergistic effect.
JOURNAL OF RARE EARTHS
(2022)
Article
Engineering, Chemical
Emmy Muhoza, Kayla Gibson, Wencai Zhang, Seyed Hassan Amini
Summary: This study developed an environmentally benign flotation reagent scheme using organic acids to enhance bastnaesite flotation while selectively depressing calcite. The results demonstrated the potential of organic acids as effective calcite depressants in the bastnaesite flotation system.
MINERALS ENGINEERING
(2023)