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金属矿山 ›› 2015, Vol. 44 ›› Issue (05): 81-84.

• 矿物工程 • 上一篇    下一篇

新型阳离子捕收剂对石英的捕收性能及作用机理

朱一民1,陈佳丽1,贾静文1,刘双安2   

  1. 1.东北大学资源与土木工程学院,辽宁 沈阳 110819,2.鞍钢集团矿业设计研究院,辽宁 鞍山 114021
  • 出版日期:2015-05-15 发布日期:2015-08-04
  • 基金资助:

    * 国家自然科学基金项目(编号:51274056、51474055),“十二五”国家科技支撑计划项目(编号:2012BAB14B05),国土资源部基金项目(编号:12120113086600)。

Collecting Performance and Mechanism of a New Cation Collector to Quartz

Zhu Yimin1,Chen Jiali1,Jia Jingwen1,Liu Shuang'an2   

  1. 1.College of Resource and Civil Engineering,Northeastern University,Shenyang 110819,China;2.Angang Group Mining Engineering Corporation,Anshan 114021,China
  • Online:2015-05-15 Published:2015-08-04

摘要: 用东北大学研制的新型高效阳离子捕收剂DBA-1对石英纯矿物进行了药剂用量、浮选温度、合适酸碱度试验,并借助Zeta电位测定、红外光谱分析和接触角测定对DBA-1浮选石英的机理进行了分析,以检验DBA-1对石英的捕收性能及效果。结果表明:①0.074~0.038 mm粒级石英纯矿物在pH=8.5、矿浆温度为18 ℃、药剂用量为75 mg/L的情况下可获得97.3%的回收率。②在无DBA-1的矿浆中,石英零电点的pH=2.26,而与DBA-1作用后的零电点偏移至10.10,说明DBA-1可以以阳离子形式在石英表面发生静电吸附;DBA-1与石英作用前后的红外光谱分析表明,二者间存在氢键吸附。③DBA-1的添加可大幅度提高石英表面的接触角,增强其表面的疏水性和可浮性,接触角在12.6°~27.0°范围内的小幅增大都会引起回收率的大幅度提高。

关键词: 阳离子捕收剂DBA-1, 石英, 浮选, 作用机理

Abstract: The flotation behavior,including the dosage of collector,the temperature and pH of pulp,on quartz using DBA-1 as a new collector developed by Northeastern University was investigated.Zeta potentials,infrared spectrum analysis and contact angle measurement were used to detect the interaction mechanism of the of the quartz surface with DBA-1,to check out the collecting performance of DBA-1 on quartz.The results show that:①Recovery of 97.3% on quartz flotation is obtained at the optimum conditions of particle size from 0.038 to 0.074 mm,pulp pH 8.5,slurry temperature 18 ℃,and the dosage of collector 75 mg/L.②After adding DBA-1 to the slurry,point of zero charge on quartz surface increased from 2.26 to 10.10.It is indicated that adsorption of DBA-1 occurred on the quartz surface.The adsorption mainly includes electrostatic adsorption and hydrogen bonding adsorption.③The quartz surface contact angle was increased obviously after adding DBA-1,which enhanced its hydrophobicity and floatability,and the recovery rate will be improved significantly when the contact angle slightly raise from 12.6°~27.0°.

Key words: Cationic collector DBA-1, Quartz, Flotation, Mechanism