Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2009, Vol. 30 ›› Issue (5): 708-711.DOI: -

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Study on extraction of SiO2 from nickel laterite ore through leaching by high concentration NaOH solution

Mu, Wen-Ning (1); Zhai, Yu-Chun (1); Liu, Yan (1); Liu, Jiao (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-05-15 Published:2013-06-22
  • Contact: Zhai, Y.-C.
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Abstract: A new leaching process for nickel laterite ore with high concentration NaOH solution was investigated, to which the effects of stirring speed, leaching temperature, initial NaOH concentration, leaching time and mass ratio of alkali to ore on the leaching rate of SiO2 were discussed. The results showed that when the stirring speed is 600 r/min at 225°C for 90 min with initial NaOH concentration 85%, and the mass ratio of alkali to ore is 5:1 in leaching process, the leaching rate of SiO2 can be up to 82.77%. In the residues the iron, magnesium and nickel are enriched, among which the NiO content increases from 1.29wt% to 2.85wt%.

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