通过浮选试验、接触角测定后矿物颗粒黏着功的计算以及芘荧光探针检测，考察捕收剂油酸钠对钼酸钙及磷灰石的浮选性能。结果表明：在碱性条件下，两种矿物的浮选行为相似，浮选回收率均可达到80%以上，油酸钠对钼酸钙和磷灰石有很好的捕收性能。六偏磷酸钠用量达到220 mg/L时，钼酸钙的回收率为62.5%，而此时磷灰石的回收率仅有20.3%，两种矿物的可浮性差异显著增加。油酸钠可以显著增加两种矿物颗粒的黏着功，使其更易向气泡粘附并上浮。六偏磷酸钠显著扩大两种矿物的表面疏水性差异，优化其浮选分离条件。油酸钠在钼酸钙及磷灰石表面未形成胶束、半胶束吸附和非静电吸附，而是化学吸附。
The flotation performance of sodium oleate (SOL) on powellite and apatite was investigated through flotation tests, contact angle measurements, work of adhesion calculations and pyrene fluorescent probe detections. The results show that the recovery of two minerals is more than 80% and their flotation behaviors are similar under alkaline conditions. And SOL has good flotation performance on both powellite and apatite. Sodium hexametaphosphate (SHMP) decreases of flotation recovery of powellite and apatite at varying degrees, and the recovery of powellite and apatite are 62.5%and 20.3%, respectively, at SHMP dosage 220 mg/L. SOL can significantly augment the work of adhesion of the two kind of mineral grains, which make them much easier to be absorbed by bubbles and to rise with them. SHMP enlarges dramatically the difference of hydrophobicity between apatite and powellite, which optimizes the flotation separation conditions of two minerals. SOL absorbs on powellite and apatite by chemisorptions rather than micelle, half micelle adsorption or electrostatic adsorption.
参考文献
| [1] | 马晶.钼矿选矿[M].北京:冶金工业出版社,2008 |
| [2] | 朱军,王彦君,李营生.高碳镍钼矿的浸出试验研究[J].矿冶工程,2009(02):75-78. |
| [3] | 孙伟;胡岳华;刘文莉 .用X射线分选机对镍钼矿进行抛尾的方法[P].中国专利,201010226395.9,2010-12-01. |
| [4] | 陈代雄;刘锡贵;罗新明;杨建文 .一种高碳钼镍矿的选矿方法[P].中国专利,200910042493.4,2009-07-15. |
| [5] | 陈代雄;杨建文;刘锡桂;李晓东,曾惠明 .一种高碳钼镍矿高效浮选分离钼镍矿回收钼镍得到钼精矿和镍钼混合精矿的方法[P].中国专利,201110029957.5,2011-10-19. |
| [6] | 吴海国.含碳镍钼矿提取镍钼冶炼新工艺试验研究[J].湖南有色金属,2008(02):16-18. |
| [7] | 胡为柏.浮选[M].北京:冶金工业出版社,1989 |
| [8] | Mathias JH.;Davenport L.;Rosen MJ. .Fluorescence study of premicellar aggregation in cationic gemini surfactants[J].Langmuir: The ACS Journal of Surfaces and Colloids,2001(20):6148-6154. |
| [9] | 周强;卢寿慈 .油酸钠捕收剂的合理使用[J].国外金属矿选矿,1993,9:38-41. |
| [10] | Conlan, M.J.W.;Mayer, K.U.;Blaskovich, R.;Beckie, R.D. .Solubility controls for molybdenum in neutral rock drainage[J].Geochemistry: exploration, environment, analysis,2012(1):21-32. |
| [11] | J. Kou;D. Tao;G. Xu .Fatty acid collectors for phosphate flotation and their adsorption behavior using QCM-D[J].International Journal of Mineral Processing,2010(1/4):1-9. |
| [12] | C.A.Young;J.D.Miller .Effect of temperature on oleate adsorption at a calcite surface: an FT-NIR/IRS study and review[J].International Journal of Mineral Processing,2000(1/4):331-350. |
| [13] | Jianying Shang;Markus Flury;James B. Harsh;Richard L. Zollars .Contact angles of aluminosilicate clays as affected by relative humidity and exchangeable cations[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2010(1):1-9. |
| [14] | BROWN S E;GREEN M C;MOESER G D;REZNEK S R .Carbon blacks and polymers containing the same[P].USA Patent,WO2006124773 A3,2006-05-16. |
| [15] | Mazor, S.;Vanounou, S.;Fishov, I. .Pyrene as a membrane depth gauge: Wavelength selective fluorescence approach to monitor pyrene localizations in the membrane[J].Chemistry and Physics of Lipids,2012(1):125-131. |
| [16] | 蒋昊 .铝土矿浮选脱硅过程中阳离子捕收剂与铝矿物和含铝硅酸矿物作用的溶液化学研究[D].中南大学,2004. |
| [17] | 汤佩徽 .磷灰石和硅质脉石浮选分离的研究[D].中南大学,2011. |
| [18] | 王淀佐.浮选理论的新进展[M].北京:科学技术出版社,1992 |
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