工程科学学报，第38卷，第4期：461467,2016年4月 Chinese Journal of Engineering,Vol.38,No.4:461-467,April 2016 DOI:10.13374/j.issn2095-9389.2016.04.003:http://journals.ustb.edu.cn Cu()、Ni(II)离子在蛇纹石表面的吸附及对其浮选 的影响 曹永丹”，曹钊2)四，张亚辉”，孙传尧》，张金山” 1)内蒙古科技大学矿业研究院，包头0140102)东北大学资源与土木工程学院，沈阳110819 3)北京矿冶研究总院，北京100044 ☒通信作者，E-mail:caozhaol217@163.cm 摘要通过吸附量测试、纯矿物浮选和红外光谱分析，研究C·和N2·离子在蛇纹石表面的吸附过程及对蛇纹石浮选的 活化机理.Cu·和N2·离子在蛇纹石表面的吸附符合二级动力学模型，等温吸附过程符合Langmuir等温吸附模型，吸附能够 自发进行，为物理吸附和化学吸附的共同作用，C2·和N2·离子在蛇纹石表面的吸附量随pH值升高而增大.C2·和N2·离 子在弱碱性条件下对蛇纹石具有活化作用，活化机理为铜镍的氢氧化物沉淀和羟基络合物作用于蛇纹石表面，形成活性位 点，黄药在活性位点上吸附生成黄原酸铜或黄原酸镍，从而使蛇纹石表面疏水性增大，浮选受到活化. 关键词浮选：蛇纹石：铜：镍：吸附；活化：机理 分类号TD95 Effect of Cu(II)and Ni(II)adsorption on serpentine flotation CAO Yong-dan,CAO Zhao),ZHANG Ya-hui,SUN Chuan-yao,ZHANG Jin-shan) 1)Institute of Mining Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China 2)College of Resources and Civil Engineering,Northeastem University,Shenyang 110819,China 3)Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China Corresponding author,E-mail:caozhaol217@163.com ABSTRACT The adsorption and activation mechanisms of Cu'and Niions on serpentine were investigated through adsorption measurements,pure mineral flotation tests and IR spectra analyses.It is found that the adsorption of Cu?and Ni?ions on serpentine agrees with the second order kinetics model,and the isothermal adsorption process correlates well with the Langmuir isotherm model. The adsorption is a spontaneous process,which is caused jointly by physical and chemical functions.The adsorption amount of Cu? and Ni?'ions on serpentine increases with increasing pH values.Under a weak alkaline condition,serpentine can be activated by Cu2'and Ni2'ions.The active sites can be formed on the surface of serpentine after being reacted with hydroxide and hydroxy com- plexes of copper and nickel,on which xanthates can be adsorbed to generate copper and nickel xanthates.These hydrophobic products improve the surface hydrophobicity of serpentine and thus activate its flotation. KEY WORDS flotation:serpentine:copper:nickel;adsorption:activation;mechanisms 蛇纹石为典型的T0型含镁层状硅酸盐矿物，其脉石矿物，浮选过程中容易进入铜镍硫化矿浮选精矿， 单元结构是由硅氧四面体S0,]和镁氧八面体 增加精矿中MgO含量，严重制约后续治炼工艺0. Mg0,(OH),]沿c轴方向排列而成，相邻单元层间依 近年来，国内外学者对铜镍硫化矿浮选抑制蛇纹 靠氢键相互连接.蛇纹石为铜镍硫化矿中常见的含镁 石做了大量研究，认为浮选过程中蛇纹石和镍黄铁矿 收稿日期：20150505 基金项目：国家自然科学基金资助项目(51174154)：内蒙古自然科学基金资助项目(2014MS0521)工程科学学报，第 38 卷，第 4 期: 461--467，2016 年 4 月 Chinese Journal of Engineering，Vol． 38，No． 4: 461--467，April 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 04． 003; http: / /journals． ustb． edu． cn Cu( II) 、Ni( II) 离子在蛇纹石表面的吸附及对其浮选 的影响 曹永丹1) ，曹 钊1，2) ，张亚辉2) ，孙传尧3) ，张金山1) 1) 内蒙古科技大学矿业研究院，包头 014010 2) 东北大学资源与土木工程学院，沈阳 110819 3) 北京矿冶研究总院，北京 100044  通信作者，E-mail: caozhao1217@ 163． com 摘 要 通过吸附量测试、纯矿物浮选和红外光谱分析，研究 Cu2 + 和 Ni2 + 离子在蛇纹石表面的吸附过程及对蛇纹石浮选的 活化机理． Cu2 + 和 Ni2 + 离子在蛇纹石表面的吸附符合二级动力学模型，等温吸附过程符合 Langmuir 等温吸附模型，吸附能够 自发进行，为物理吸附和化学吸附的共同作用，Cu2 + 和 Ni2 + 离子在蛇纹石表面的吸附量随 pH 值升高而增大． Cu2 + 和 Ni2 + 离 子在弱碱性条件下对蛇纹石具有活化作用，活化机理为铜镍的氢氧化物沉淀和羟基络合物作用于蛇纹石表面，形成活性位 点，黄药在活性位点上吸附生成黄原酸铜或黄原酸镍，从而使蛇纹石表面疏水性增大，浮选受到活化． 关键词 浮选; 蛇纹石; 铜; 镍; 吸附; 活化; 机理 分类号 TD95 Effect of Cu( II) and Ni( II) adsorption on serpentine flotation CAO Yong-dan1) ，CAO Zhao1，2)  ，ZHANG Ya-hui2) ，SUN Chuan-yao3) ，ZHANG Jin-shan1) 1) Institute of Mining Engineering，Inner Mongolia University of Science and Technology，Baotou 014010，China 2) College of Ｒesources and Civil Engineering，Northeastern University，Shenyang 110819，China 3) Beijing General Ｒesearch Institute of Mining and Metallurgy，Beijing 100044，China  Corresponding author，E-mail: caozhao1217@ 163． com ABSTＲACT The adsorption and activation mechanisms of Cu2 + and Ni2 + ions on serpentine were investigated through adsorption measurements，pure mineral flotation tests and IＲ spectra analyses． It is found that the adsorption of Cu2 + and Ni2 + ions on serpentine agrees with the second order kinetics model，and the isothermal adsorption process correlates well with the Langmuir isotherm model． The adsorption is a spontaneous process，which is caused jointly by physical and chemical functions． The adsorption amount of Cu2 + and Ni2 + ions on serpentine increases with increasing pH values． Under a weak alkaline condition，serpentine can be activated by Cu2 + and Ni2 + ions． The active sites can be formed on the surface of serpentine after being reacted with hydroxide and hydroxy com￾plexes of copper and nickel，on which xanthates can be adsorbed to generate copper and nickel xanthates． These hydrophobic products improve the surface hydrophobicity of serpentine and thus activate its flotation． KEY WOＲDS flotation; serpentine; copper; nickel; adsorption; activation; mechanisms 收稿日期: 2015--05--05 基金项目: 国家自然科学基金资助项目( 51174154) ; 内蒙古自然科学基金资助项目( 2014MS0521) 蛇纹石为典型的 TO 型含镁层状硅酸盐矿物，其 单 元 结 构 是 由 硅 氧 四 面 体［SiO4］和 镁 氧 八 面 体 ［MgO4 ( OH) 2］沿 c 轴方向排列而成，相邻单元层间依 靠氢键相互连接． 蛇纹石为铜镍硫化矿中常见的含镁 脉石矿物，浮选过程中容易进入铜镍硫化矿浮选精矿， 增加精矿中 MgO 含量，严重制约后续冶炼工艺［1］． 近年来，国内外学者对铜镍硫化矿浮选抑制蛇纹 石做了大量研究，认为浮选过程中蛇纹石和镍黄铁矿