蛇纹石及六偏磷酸钠对硼镁石浮选的影响（英文）

发布时间：2018-07-26 17:37

【摘要】：为提高硼镁石浮选回收率,使用六偏磷酸钠减小蛇纹石对浮选的不利影响。通过浮选试验、zeta电位测试、傅里叶红外光谱分析、XPS分析及DLVO理论等手段,研究蛇纹石粒度、含量以及六偏磷酸钠(SHMP)对硼镁石浮选的影响,并对矿物颗粒间的相互作用以及六偏磷酸钠的作用机理进行分析。结果表明,蛇纹石与硼镁石颗粒间易发生团聚作用,且蛇纹石粒度对硼镁石浮选结果影响十分显著。与粗粒级蛇纹石相比,粒径小于38μm的蛇纹石能显著降低硼镁石的回收率。加入SHMP后,蛇纹石对硼镁石浮选的不利影响得到明显减弱。机理研究表明,SHMP能影响蛇纹石与硼镁石矿物表面电荷,从而阻碍颗粒间团聚的发生,使矿物颗粒在矿浆中呈良好的分散状态,有利于硼镁石的浮选。此外,SHMP通过氢键与化学吸附作用于蛇纹石表面,并生成一种络合物使蛇纹石的可浮性降低。
[Abstract]:Sodium hexametaphosphate was used to reduce the adverse effect of serpentine on flotation in order to improve the recovery rate of borneyite flotation. The effects of particle size and content of serpentine and sodium hexametaphosphate (SHMP) on the flotation of boron magnesia were studied by means of flotation test, Fourier transform infrared spectroscopy (FTIR) and DLVO theory. The interaction between mineral particles and the mechanism of sodium hexametaphosphate were analyzed. The results show that agglomeration occurs easily between serpentine and magnesia particles, and the effect of serpentine particle size on the flotation results is very significant. Compared with coarse serpentine, serpentine with diameter less than 38 渭 m can significantly reduce the recovery rate of boron magnesia. After the addition of SHMP, the adverse effect of serpentine on the flotation of boromite was obviously weakened. The mechanism study shows that SHMP can affect the surface charge of serpentine and bornesite minerals, which hinders the occurrence of agglomeration between particles and makes the mineral particles in a good dispersion state in slurry, which is beneficial to the flotation of boron magnesia. In addition, SHMP acts on the surface of serpentine by hydrogen bond and chemisorption, and forms a complex to reduce the floatability of serpentine.
【作者单位】：东北大学资源与土木工程学院;
【基金】：Project(51204033) supported by the National Natural Science Foundation of China Project(L2014088) supported by Liaoning Provincial Education Department of China
【分类号】：TD923;TD97

【相似文献】