| 苯甲羟肟酸钠与C18烷(烯)酸钠协同浮选金红石的机理研究 |
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| 引用本文： | 刘明宝, 耿西侠, 苏涛, 姚国超, 姚德亮, 李一凡. 苯甲羟肟酸钠与C18烷(烯)酸钠协同浮选金红石的机理研究[J]. 矿产保护与利用, 2022, 42(1): 68-74. doi: 10.13779/j.cnki.issn1001-0076.2022.01.010 |
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| 作者姓名： | 刘明宝 耿西侠 苏涛 姚国超 姚德亮 李一凡 |
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| 作者单位： | 1.陕西省尾矿资源综合利用重点实验室, 陕西 商洛 726000;; 2.商洛学院 化学工程与现代材料学院, 陕西 商洛 726000 |
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| 基金项目： | 国家自然科学基金面上项目21973058陕西省教育厅秦岭优势矿产资源开发及应用催化创新团队陕教[2020]137号 |
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| 摘 要： | 研究了金红石在苯甲羟肟酸钠与C18烷(烯)酸钠复合体系中的浮选特性, 采用多种界面化学检测手段研究了组合药剂之间以及组合药剂与金红石的作用机理。结果表明: 试验条件下四种药剂对金红石捕收能力的大小顺序为: 亚麻酸钠(εmax=89.23%, ε为回收率)>亚油酸钠(εmax=69.57%)>苯甲羟肟酸钠(εmax=38.43%)>硬脂酸钠(εmax=7.13%)。具有相同碳原子数的脂肪酸钠分子中的双键数目对药剂的捕收能力及药剂组合的协同效应影响较大, 深层次的原因则是双键数目的多少可对脂肪酸类药剂的krafft点、分子结构及其与苯甲羟肟酸钠之间的作用力产生不同影响。三种药剂组合对金红石捕收能力的大小顺序为: 苯甲羟肟酸钠+亚油酸钠≈苯甲羟肟酸钠+亚麻酸钠≫苯甲羟肟酸钠与硬脂酸钠。脂肪酸类药剂分子中的双键可与苯甲羟肟酸钠分子中的苯环产生电子共轭效应, 该效应所生成的缔合物种类及其空间构象是影响组合药剂浮选效果的关键因素。苯甲羟肟酸钠和亚油酸钠体系中金红石的浮选行为与其带隙变化有较好的对应关系, 但苯甲羟肟酸钠与亚麻酸钠体系中的对应关系则不明显, 具体原因则有待于进一步研究。
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| 关 键 词： | 金红石 浮选 捕收剂 药剂协同 界面组装 |
| 收稿时间： | 2022-02-20 |
Flotation Properities of Rutile Using Salts of Benzohydroxamic and Octadecenoic (Octadecanoic) Acids as Synergistic Collectors |
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| LIU Mingbao, GENG Xixia, SU Tao, YAO Guochao, YAO Deliang, LI Yifan. Flotation Properities of Rutile Using Salts of Benzohydroxamic and Octadecenoic (Octadecanoic) Acids as Synergistic Collectors[J]. Conservation and Utilization of Mineral Resources, 2022, 42(1): 68-74. doi: 10.13779/j.cnki.issn1001-0076.2022.01.010 |
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| Authors: | LIU Mingbao GENG Xixia SU Tao YAO Guochao YAO Deliang LI Yifan |
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| Affiliation: | 1.Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo 726000, China;; 2.College of Chemical Engineering and Modern Material, Shangluo University, Shangluo 726000, China |
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| Abstract: | Flotation responses of rutile in various systems of sodium benzohydroxamide (BHA) combined with several fatty acid salts collectors were studied and the interaction mechanisms of the reagents, as well as that of the reagents onto the mineral have been studied using various measurements, namely, Zeta potential, surface tension, contact angle and UV diffuse reflectance spectroscope. The results indicate that the collecting ability (recovery) of the single reagent follows the order: sodium linolenate (89.23%) > sodium linoleate (69.57%) > sodium benzohydroxamide (38.43%) ≫ sodium stearate (7.13%). The number of the double bond in sodium salts of fatty acids bearing the same length of hydrocarbon chain has a significant influence on the reagent collecting ability and the synergistic effect of reagent combination, however, the deep reason is that the double bond has an important impact on such properties as Krafft point, molecular structure of fatty-acid collector as well as the interactions of fatty-acid collectors with BHA. The collecting ability of the three reagent combinations is sodium benzohydroxamide + sodium linoleate(SL) ≈ sodium benzohydroxamide + sodium linolenate (SN) ≫ sodium benzohydroxamide + sodium stearate (ST). It is observed that there is an electron conjugation effect among the double bonds in fatty-acid collector and the benzene ring in BHA which is the main reason for the formation of the association complex between the reagents. The amount and the configuration of the complexes could be critical for the collecting performance of reagent combination. |
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| Keywords: | rutile flotation collector synergistic reagents interfacial organization |
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