Iron Recovery by Two-Stage Roasting the Gold-Bearing Pyrite Concentrate and Gold-Leaching from the Pyrite Cinder by Thiourea

Abstract:

Pyrite cinders, which are the waste products of sulphuric acid manufacturing plants, contain hazardous but valuable heavy metals. This passage introduced that iron recovery by two-stage roasting the pyrite concentrate and gold-leaching from the pyrite cinder by thiourea. After re-floating and two-stage roasting of the gold-bearing low-grade pyrite concentrate, the final cinder contains about 0.056% As and 61% Fe and high grade gold and silver. The thiourea gold-leaching experiment for the pyrite cinder shows the gold-leaching rate is up to 90.4% in the case of grinding fineness of 60%-0.074mm, pH = 1~2, R=1:2, thiourea dosage of 10g / L, ferric sulfate dosage of 3g / L, leaching time of 6h.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 784-788
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.784
• Online since: June 2014
• Authors: Gui Chun He, Yi Peng Wu, Jin Ni Feng
• Keywords: Arsenic Removal, Desulfurization, Gold-Leaching, Pyrite Concentrate, Roast

References

[1] Weiqiang Zhuang, 2001. Treatment and Utilization of the Solid Wastes. Beijing: Chemical Industry Press (in Chinese).

[2] Alp, I., Deveci, H., Yazıcı, E.Y., Türk, T., Süngün, Y.H., 2009. Potential use of pyrite cinders as raw material in cement production: results of industrial scale trial perations. Journal of Hazardous Materials, vol. 166, no. 1, pp.144-149.

DOI: 10.1016/j.jhazmat.2008.10.129

[3] Binbin He, Xike Tian , Yan Sun, et al. 2010. Recovery of iron oxide concentrate from high-sulfur and low-grade pyrite cinder using an innovative beneficiating process. Hydrometallurgy, vol. 104, pp.241-246.

DOI: 10.1016/j.hydromet.2010.06.009

[4] Fellet, G., Marchiol, L., Perosa, D., Zerbi, G., 2007. The application of phytoremediation technology in a soil contaminated by pyrite cinders. Ecological Engineering, vol. 31, no. 3, pp.207-214.

DOI: 10.1016/j.ecoleng.2007.06.011

[5] Deli Wu, Shenhong Zhu, Luming Ma et al., 2004. Study on New process of recovering iron powder from the pyrite cinder . Environmental Pollution and Control , vol. 26, no. 5, pp.387-389(in Chinese).

[6] Tugrul, N., Derun, E.M., Piskin, M., Piskin, S., 2003. Evaluation of pyrite ash wastes obtained by the sulfuric acid production industry. Proceedings of the 8th International Conference on Environmental Science and Technology, Lemmos Island, Vol. A, Greece, pp.918-925.

DOI: 10.1016/j.powtec.2007.01.012

[7] Walker, P.L., 1995. Mineral matter removal from anthracite by high-temperature chlorination. Fuel , vol. 74, no. 2, pp.179-185.

DOI: 10.1016/0016-2361(95)92652-m