Rare Metals

, Volume 36, Issue 6, pp 533–540

A novel flotation scheme: selective flotation of tungsten minerals from calcium minerals using Pb–BHA complexes in Shizhuyuan

  • Hai-Sheng Han
  • Wen-Li Liu
  • Yue-Hua Hu
  • Wei Sun
  • Xiao-Dong Li

DOI: 10.1007/s12598-017-0907-8

Cite this article as:
Han, HS., Liu, WL., Hu, YH. et al. Rare Met. (2017) 36: 533. doi:10.1007/s12598-017-0907-8


The similar floatabilities of calcium minerals and the huge difference between scheelite and wolframite have resulted in difficulties during their separation by flotation in Shizhuyuan Mine. In this study, novel collectors, lead complexes of benzohydroxamic acid (Pb–BHA), were introduced to modify the surface properties of scheelite and wolframite, thereby effectively and selectively improving floatability. The Pb–BHA complexes are found to be selective for the separation of scheelite and calcium minerals with little use of depressants and enable the synchronous flotation of scheelite and wolframite. Hence, a novel flotation process was developed for the recovery of tungsten minerals. The process is simplified greatly, and the recovery is improved by almost 10%. Removing or decreasing the amount of water glass contributes to the improvement of tungsten and fluorite recovery and the circulation of water and reagents, which benefits the environment.


Tungsten minerals Flotation Calcium minerals Benzohydroxamic acid complexes Water glass 

Funding information

Funder NameGrant NumberFunding Note
Innovation Driven Plan of Central South University
  • 2015CX005
111 Project
  • B14034
National Natural Science Foundation of China
  • 51634009

Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.School of Mineral Processing and BioengineeringCentral South UniversityChangshaChina
  2. 2.Hu Nan Shizhuyuan Non-ferrous Metal Limited Liability CorporationChenzhouChina

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