Skip to main content
SpringerLink
Log in

Separation of diaspore from bauxite by selective flocculation using hydrolyzed polyacrylamide

  • Published:
Journal of Central South University Aims and scope Submit manuscript

Abstract

Selective flocculation is a new method to solve the problem of China’s bauxite de-silication besides flotation and reverse flotation. The method of selective flocculation of bauxite using hydrolyzed polyacrylamide as flocculant was experimented and evaluated. The results of diaspore and kaolinite single mineral settling tests show that the difference between settlement yield of kaolinite (settling 15 min) and diaspore (settling 3 min) increases from 16% to 60% by adding flocculant at pH=7. Results of selective flocculation experiment of bauxite show that the higher concentrate grade (65.75) and Al-Si ratio (7.34) could be obtained with sodium carbonate as dispersant compared with sodium hexametaphosphate; under the action of flocculating agent, the concentrate grade and Al-Si ratio increase to 67.99 and 9.01. These results could meet the requirements of Bayer production, and the simpler process was expected to cost far less than traditional flotation method and a promising de-silication method of bauxite.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. LI L. Desilication and iron removal research for diasporic-hauxite by mineral processing [J]. Journal of Central South Institute of Mining and Metallurgy, 1980(4): 82–84. (in Chinese)

    Google Scholar 

  2. LIANG A, LI T. Discussion on reasonable technology flowsheet of bauxite processing [J]. Light Metal, 1982(11): 1–6. (in Chinese)

    Google Scholar 

  3. ZHANG G, LU Y, OU L. A new collector RL for flotation of bauxite [J]. The Chinese Journal of Nonferrous Metals, 2001, 11(4): 712–715. (in Chinese)

    Google Scholar 

  4. ZHANG G. Theory and technology of flotation on bauxite desilicate [M]. Changsha: Central South University, 2001: 7–8. (in Chinese)

    Google Scholar 

  5. LU Y, ZHANG G, FENG Q. A novel collector RL for flotation of bauxite [J]. Journal of Central South University of Technology, 2002, 9(1): 21–24.

    Article  Google Scholar 

  6. JIANG H, HU Y, XU J. Synthesis and structure-activity relationships of carboxyl hydroxidoxime in bauxite flotation [J]. J Nonferrous Metals, 2001, 11(4): 702–706. (in Chinese)

    Google Scholar 

  7. WANG Y, HU Y, HE P, GU G. Reverse flotation for removal of silicates from diasporic-bauxite [J]. Mineral Engineering, 2004, 17(1): 63–68.

    Article  Google Scholar 

  8. LIU Chang-miao, CAO Xue-feng, CHEN Chen, HU Yue-hua. Research on the flotation of quartz using dodecyl tertiary amines [J]. Mining and Metallurgical Engineering, 2009, 29(3): 37–39. (in Chinese)

    Google Scholar 

  9. LIU Chang-miao, HU Yue-hua, CAO Xue-feng. Substituent effects in kaolinite flotation using dodecyl tertiary amines [J]. Minerals Engineering, 2009, 22(9/10): 849–852.

    Article  Google Scholar 

  10. McFARLANE A, BREMMELL K, ADDAI-MENSAH J. Improved dewatering behavior of clay minerals dispersions via interfacial chemistry and particle interactions optimization [J]. Journal of Colloid and Interface Science, 2006, 293: 116–127.

    Article  Google Scholar 

  11. BEHL S, WILLIS M J, YOUNG R H. Method for separating mixture of finely divided minerals, US Patent 535890 [P]. 1996.

    Google Scholar 

  12. SHI J. Method of beneficiating kaolin clay utilizing ammonium salts: US Patent 4604369 [P]. 1986.

    Google Scholar 

  13. ATTIA Y A. Design of selective polymers for biological and colloid separation by selective flocculation [C]// ATTIA Y A, Ed. Flocculation in Biotechnology and Separation Systems. Amsterdam; Elsevier, 1987: 227–246.

    Google Scholar 

  14. LI Hai-pu. Structure-performance of modified polymers and the mechanism for flatation of aluminum and silicate minerals [D]. Changsha: Central South University, 2002: 29–31.

    Google Scholar 

  15. HU Yue-hua. A role of crystal structure in Separation of diaspore and kaolinite, pyrophyllite and illite [J]. Metallic Ore Dressing Abroad, 2003(12): 24–30.

    Google Scholar 

  16. LIU Xiao-wen, HU Yue-hua, HUANG Sheng-sheng, HU Yue-hua. Chemical composition and surface property of kaolins [J]. Acta Mineralogica Sinica, 2001, 21(3): 443–447.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Wen-li Liu  (刘文莉), Yue-hua Hu  (胡岳华) & Wei Sun  (孙伟)

Authors
  1. Wen-li Liu  (刘文莉)
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Yue-hua Hu  (胡岳华)
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Wei Sun  (孙伟)
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Wei Sun  (孙伟).

Additional information

Foundation item: Project(2005CB623701) supported by the National Key Basic Research Program (973) of China

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Liu, Wl., Hu, Yh. & Sun, W. Separation of diaspore from bauxite by selective flocculation using hydrolyzed polyacrylamide. J. Cent. South Univ. 21, 1470–1476 (2014). https://doi.org/10.1007/s11771-014-2087-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11771-014-2087-0

Key words

Search

Navigation