Study on Mechanism of Oxidation Modification of Copper Slag

  • Qiuju LiEmail author
  • Fanxi Yang
  • Ziyang Wang
  • Songyan Liu
Technical Paper


The pyrometallurgical processing of copper concentrates generates large amounts of iron and copper-containing slag. It is an available way to separate and recover iron and copper by oxidative modification slag. The copper slag used in this experiment is water-quenched copper slag tailings. The method of the experiment is to separate copper and iron in the copper slag by oxidation-magnetic separation method, and the amount of copper and iron recovered in the later stage is also greatly reduced. Mineralogical phase transform of copper slag during oxidation modification process has been investigated with the goal to provide valuable information for the recovery of copper and iron. The influence of temperature and time on the mineral phase transformation has mainly been studied during the oxidation modification. XRD combined with FT-IR has been used to characterise the mineral phase change. The experimental results showed that the oxidation temperature and time were favorable for modification of copper slag under medium- and low-temperature conditions. When the oxidation temperature was 950 °C, fayalite was transformed to hematite and quartz, which provided the necessary conditions for separating iron and silicon, and copper embedded in fayalite was also released. In addition, the copper slag particles were significantly grown under the action of oxidation reaction which was also beneficial to subsequent selection and treatment.


Copper slag Recovery of iron resources Oxidation temperature Oxidation modification 



The authors acknowledge the financial support of the Joint Funds of the National Natural Science Foundation of China (Grant Nos. U1760109, U1860203); Appreciation instrumental analysis & research center of Shanghai University.


  1. 1.
    World Bureau of Metal Statistics. January to December 2017 Metals Balances.Google Scholar
  2. 2.
    Liu G, and Zhu R, Min Metall 17 (2008) 59.Google Scholar
  3. 3.
    Mackwell S J, Phys Chem Miner 19 (1992) 220.CrossRefGoogle Scholar
  4. 4.
    Chen Y W, World Nonferrous Met 9 (2001) 53.Google Scholar
  5. 5.
    Kim B S, Jo S K, Shin D, Lee JC, and Jeong SB, Int J Miner Process 124 (2013) 124.CrossRefGoogle Scholar
  6. 6.
    R.M.Manser, Li CG. Flotation selection of silicate minerals [J]. Foreign metal ore selection, 1979, 7: 8.Google Scholar
  7. 7.
    Finch C B, Clark G W, and Kopp O C, Am Mineral 65 (1980) 381.Google Scholar
  8. 8.
    Pang J M, Guo P M, and Zhao P, Nonferrous Met (Extr Metall) 3 (2013) 51.Google Scholar
  9. 9.
    Liao Z L, Tang P, Zhang B, Zhang H W, Shi X Y, Li Q J, and Hong X, China Nonferrous Metall 41 (2012) 74.Google Scholar
  10. 10.
    Dalby K N, and King P L, Am Mineral 91 (2006) 1783.CrossRefGoogle Scholar
  11. 11.
    Chen M Y, and Li Z D, Foundry 4 (1993) 9.Google Scholar
  12. 12.
    Banza A N, Gock E, and Kongolo K, Hydrometallurgy 67 (2002) 63.CrossRefGoogle Scholar
  13. 13.
    Cao H Y, Fu N X, Wang CG, Zhang L, Xia F S, Sui Z T, and Feng N X, Multipurp Util Miner Resour 2 (2009) 8.Google Scholar
  14. 14.
    Cao H Y, Fu N X, Zhang L, Xia F S, Sui Z T, Feng N X, Chin J Process Eng 9 (2009) 284.Google Scholar
  15. 15.
    Yang T, Hu J H, Wang H, and Li L, Chin J Process Eng 11 (2011) 613.Google Scholar
  16. 16.
    Deng Z Y, Adv Ceram 20 (1999) 11.Google Scholar
  17. 17.
    Mollah M Y A, Promreuk S, Schennach R, Cocke D L, and Güler R, Fuel 78 (1999) 1277.CrossRefGoogle Scholar
  18. 18.
    Xu C M, Wang S W, Huang X X, and Guo J K, J Inorg Mater 22 (2007) 577.Google Scholar

Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  • Qiuju Li
    • 1
    Email author
  • Fanxi Yang
    • 1
  • Ziyang Wang
    • 2
  • Songyan Liu
    • 3
  1. 1.State Key Laboratory of Advanced Special SteelsShanghai UniversityShanghaiChina
  2. 2.Shanghai Key Laboratory of Modern Metallurgy and Materials ProcessingShanghai UniversityShanghaiChina
  3. 3.School of Materials Science and EngineeringShanghai UniversityShanghaiChina

Personalised recommendations