煤炭工程 ›› 2020, Vol. 52 ›› Issue (4): 149-154.doi: 10.11799/ce202004028

• 研究探讨 • 上一篇    下一篇

油酸钠体系中Ca2+对不同pH值下高岭石和石英浮选的影响研究

侯宝宏,刘令云   

  1. 安徽理工大学材料科学与工程学院
  • 收稿日期:2019-10-13 修回日期:2020-01-02 出版日期:2020-04-20 发布日期:2020-07-22
  • 通讯作者: 刘令云 E-mail:lyunliu@163.com

Effect of Ca2+ on the Flotation of Kaolinite and Guartz at Different pH Values in the Presence of Sodium Oleate

  • Received:2019-10-13 Revised:2020-01-02 Online:2020-04-20 Published:2020-07-22

摘要: 为了有效分离煤泥水中的高岭石与石英,通过Zeta电位测试以及吸附量测定,研究了油酸钠 (NaOL)体系下,Ca2+在不同pH值下对高岭石和石英的浮选的影响研究。结果表明:在油酸钠体系下,高岭石在pH值为6~8有较好的可浮性,回收率在70.00%以上|石英在pH为12时有较好的可浮性,回收率达到70.41%。0.8mmol/L油酸钠+1.0mmol/L Ca2+ 体系下,当pH值为6和12时,1∶1比例的人工混合矿物可以通过浮选将二者有效分离,精矿产率分别为46.73%、51.12%,品位分别为73.23%、17.45%|Zeta电位测试以及吸附量测定分析表明,油酸钠体系下,Ca2+对油酸钠在高岭石表面吸附影响较小,在酸、中性条件下Ca2+抑制油酸钠在石英表面的吸附,而在强碱条件促进其吸附。

关键词: 浮选, 油酸钠, 人工混合矿, 高岭石, 石英

Abstract: Abstract:In order to separate kaolinite and quartz, the effect of calcium ion on flotation of kaolinite and quartz at different pH values in sodium oleate (NaOL) system was investigated according to the test results of Zeta potential and adsorption quantity.The results show that Kaolinite has good flotation characteristics in pH range of 6~8,and the recovery rate is above 70.00% ;quartz has good flotation characteristics at pH of 12, and the recovery rate reaches 70.43%.In 0.8mmol/L sodium oleate with 1.0mmol/L Ca2+ system, A 1:1 ratio of artificially mixed minerals can be separated by flotation at pH of 6 and 12,The concentrate yields were 47.83% and 47.83%, respectively, and the grades were 73.23% and 17.45%, respectively.Zeta potential and adsorption quantity show that in the sodium oleate system,Ca2+ has little effect on the floatability of kaolinite,and inhibits the floatability of quartz in the acid andneutral condition,and promotes its adsorption in strong alkaline conditions .

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