Speciation Analysis of Harmful Elements in the Scheelite Tailings

Abstract:

The speciations of lead, zinc, arsenic from the skarn type scheelite flotation tailings of a Hubei Mining Co., Ltd were analysized on the ICP-AES spectroscopy, while the samples were prepared with the BCR three step extraction method proposed by the Standard Bureau of European Union and the improved BCR sequential extraction method proposed by Rauret.The results showed that: (1) The contents of arsenic, lead and zinc existing in Stable residual state, are 66.23%、41.44% and 36.34%, respectively, and the harmful elements in the tailings are basically stable under the normal environment conditions; (2)Lead in the exchangeable speciation with better activity occupies 24.61%,and the exchangeable speciation would be released out through the purification treatment of mineral processing wastewater and the placement clarification of the tailings to improve the rate of the residue state and to ensure the safety of comprehensive utilization of tailings; (3)Zinc in the oxidizable extraction fraction amounts to 40.30%, and the comprehensive utilization of tailings should prevent the release of zinc under the strong oxidizing conditions.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 3096-3099
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.3096
• Online since: December 2014
• Authors: Zi Qiang Gu, Xu Qing Liu*, Ke Xiang, Xuan Qin, Ya Yun Li
• Keywords: Exchangeable Speciation, Harmful Elements, Mine Tailings, Residual Speciation, Skarn Type Scheelite

References

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DOI: 10.1039/a807854h