Wang Weiwei, Hou Shaochun, Li Erdou, Yang Zhanfeng, Guo Chunlei, Li Qiang, Jin Hailong, Wang Qiwei, Wei Wei
State Key Laboratory of Bayan Obo Rare Earth Resource Researches, Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou, 014030, Inner Mongolia, China.
School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
ChemistryOpen. 2021 Dec;10(12):1227-1233. doi: 10.1002/open.202100156. Epub 2021 Dec 6.
Collector OA, oleic acid, is widely used industrially for fluorite flotation. Low selectivity, dispersibility and collecting capability of the OA collector are always observed. In this study, compared with flotation of dolomite, a collector mixture of OA and SPE (styrylphenol polyoxyethylene ether) demonstrated significantly better performances for the fluorite. An optimal mass ratio 4 : 1 OA : SPE was found, and the recovery of fluorite was increased from over 85 % to more than 94 % compared with pure OA. Furthermore, the dosage of the collector agent was reduced from 50 mg mL to 20 mg mL , which did not negatively impact the recovery of dolomite. The results from the contact angle tests indicated that SPE selectively increased the surface hydrophobicity of fluorite but had little effect on dolomite. Besides, zeta potential measurements and IR analyses revealed that the addition of SPE led to strong chemical adsorption on the surface of fluorite, resulting in a significant difference in the flotation performances of the two minerals. Therefore, SPE-emulsified OA is corroborated to prompt more selectivity and collecting capability on flotation of fluorite over dolomite.
捕收剂OA，即油酸，在工业上广泛用于萤石浮选。人们一直观察到OA捕收剂的选择性、分散性和捕收能力较低。在本研究中，与白云石浮选相比，OA和SPE（苯乙烯基苯酚聚氧乙烯醚）的捕收剂混合物对萤石表现出明显更好的浮选性能。发现了4 : 1的OA : SPE最佳质量比，与纯OA相比，萤石回收率从85%以上提高到94%以上。此外，捕收剂用量从50 mg /mL降至20 mg /mL，这对白云石回收率没有负面影响。接触角测试结果表明，SPE选择性地增加了萤石的表面疏水性，但对白云石影响很小。此外，ζ电位测量和红外分析表明，SPE的添加导致萤石表面发生强烈的化学吸附，从而使两种矿物的浮选性能产生显著差异。因此，证实了SPE乳化的OA在萤石与白云石的浮选过程中具有更高的选择性和捕收能力。
