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金属矿山 ›› 2019, Vol. 48 ›› Issue (02): 102-105.

• 浮选·浮选药剂 • 上一篇    下一篇

铜离子对锡石浮选的影响及其机理研究

宫贵臣1,2,刘杰1,2,韩跃新1,2,朱一民1,2   

  1. 1. 东北大学资源与土木工程学院,辽宁 沈阳 110819;2. 难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁 沈阳 110819
  • 出版日期:2019-02-25 发布日期:2019-04-08
  • 基金资助:

    基金项目:国家自然科学基金项目(编号:51674066,51204035,51474055)。

Study on the Effect and Mechanism of Cu2+ on Cassiterite Flotation

Gong Guichen1,2, Liu Jie1,2, Han Yuexin1,2, Zhu Yimin1,2   

  1. 1. School of Resources and Civil Engineering, Northeastern University,Shenyang 110819,China;2. National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819,China
  • Online:2019-02-25 Published:2019-04-08

摘要: 为探索Cu2+对锡石的活化机理,在苯乙烯膦酸(SPA)浮选体系中进行锡石单矿物浮选试验。结果表明,在pH为2.0~7.4的范围内Cu2+对锡石具有活化作用,在pH=4,SPA用量250 mg/L,Cu2+用量为4×10-3 mol/L条件下,锡石的浮选回收率较未添加Cu2+时提高了11个百分点。动电位检测和XPS分析结果显示:Cu2+可以通过吸附或者取代作用在锡石表面,增加锡石表面与SPA作用的反应位点,进而活化锡石,增加SPA在锡石表面的吸附量。试验结果可以为锡石资源的浮选回收工艺提供指导。

关键词: 锡石, 苯乙烯膦酸, Cu2+, 活化, 机理

Abstract: In order to explore the activation mechanism of Cu2+ on cassiterite, the monomineral flotation experiment of cassiterite was carried out in the styrene phosphonic acid (SPA) flotation system. The results show that Cu2+ has activation effect on cassiterite in the pH range of 2.0~7.4. Under the conditions of pH=4, SPA dosage of 250 mg/L and Cu2+ dosage of 4 ×10-3 mol/L, the flotation recovery rate of cassiterite is 11 percentage points higher than that without Cu2+. The results of electrodynamic potential detection and XPS analysis showed that Cu2+ could increase the reaction site of SPA on the surface of cassiterite by adsorption or substitution, thus increasing the adsorption amount of SPA on the surface of cassiterite and activating cassiterite. The results are of great significance for the flotation recovery increase of cassiterite resources.

Key words: Cassiterite, Styrene phosphonic acid(SPA), Cu2+, Activation, Mechanism