Characterization and Iron Removal Treatment of Ion-Adsorption Rare Earth Tailings in Southern ChinaReportar como inadecuado




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The ion-adsorption rare earth tailings have become a serious environmental pollution in SouthernChina, yet the potential of their economical value has not been fully exploited. In this work, thechemical and mineral compositions of the ion-adsorption rare earth tailings were characterizedby Mineral Liberation Analyze MLA and XRF. The results show that 91.98 wt% of the tailings arecomposed of kaolinite and quartz, latter of which was removed by the sieving method. The otherminor minerals contain feldspar, biotite, muscovite, titanomagnetite and limonite. Amongst these,the iron-bearing minerals are mostly found in the titanomagnetite and limonite which can bemostly removed by using a periodic high-gradient magnetic separator with a magnetic inductionof 0.6 Tesla. The Fe2O3 content of the tailings changed from 2.11 wt% to 1.06 wt% after the sortingprocess, which met the Chinese national standard of TC-3 grade raw materials for ceramic industryapplications. The Fe2O3 content in kaolinite was further decreased after Na2S2O4 treatment.

KEYWORDS

Tailings, Resource, Rare Earth, Iron Removal, Kaolinite, Magnetic Separation

Cite this paper

Wang, Y.Q., Nie, X., Chang, Q.B., Liang, H.Y., Zhang, X.Z. and Zhou, J.-E. 2016 Characterization and Iron Removal Treatment of Ion-Adsorption Rare Earth Tailings in Southern China. Journal of Minerals and Materials Characterization and Engineering, 4, 127-134. doi: 10.4236-jmmce.2016.42012.





Autor: Yongqing Wang, Xin Nie, Qibing Chang*, Huayin Liang, Xiaozhen Zhang, Jian-Er Zhou

Fuente: http://www.scirp.org/



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