Upgrading and dephosphorization of Western Australian iron ore using reduction roasting by adding sodium carbonate
Source abstract
Abstract
The technology of direct reduction by adding sodium carbonate (Na2CO3) and magnetic separation was developed to treat Western Australian high phosphorus iron ore. The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in the form of solid solution, which cannot be removed through traditional ways. During reduction roasting, Na2CO3 reacts with gangue minerals (SiO2 and Al2O3), forming aluminum silicate-containing phosphorus and damaging the ore structure, which promotes the separation between iron and phosphorus during magnetic separation. Meanwhile, Na2CO3 also improves the growth of iron grains, increasing the iron grade and iron recovery. The iron concentrate, assaying 94.12wt% Fe and 0.07wt% P at the iron recovery of 96.83% and the dephosphorization rate of 74.08%, is obtained under the optimum conditions. The final product (metal iron powder) after briquetting can be used as the burden for steelmaking by an electric arc furnace to replace scrap steel.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metal Extraction and Bioleaching · Minerals Flotation and Separation Techniques · Iron and Steelmaking Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (15)
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1. C.Y. Cheng, V.N. Misra, J. Clough, and R. Mun, Dephosphorisation of Western Australian iron ore by hydrometallurgical process, Miner. Eng., 12(1999), No. 9, p. 1083.10.1016/S0892-6875(99)00093-X ↗
2. J. Graham, Phosphorus in iron ore from the Hamersley iron formation, [in] Proceedings of the Australian Institute of Mining and Metallurgy, Queensland, 1973, p. 41.
3. J.E.A. Gooden, W.M. Walker, and R.J. Allen, AMDEPHOS: a chemical process for dephosphorisation of iron ore, [in] Proceedings of National Chemical Engineering Conference, Queensland, 1974, p. 21.
4. M. Muhammed and Y. Zhang, A hydrometallurgical process for the dephosphorization of iron ore, Hydrometallurgy, 21(1989), No. 3, p. 277.10.1016/0304-386X(89)90002-9 ↗
5. R. Forssberg and G. Adolfsson, Dephosphorisation of highphosphorus iron ores by means of acid leaching, Erzmetal, 34(1981), p. 316.
6. Y.S. Jin, T. Jiang, and Y.B. Yang, Removal of phosphorus from iron ores by chemical leaching. J. Cent. South Univ. Technol., 13(2006), No. 6, p. 673.10.1007/s11771-006-0003-y ↗
7. D.Q. Zhu, Y.Z. Xiao, T.J. Chun, and J. Pan, Upgrading and removing phosphorus from low-grade and high phosphorus containing iron ores, [in] XXV International Mineral Processing Congress, Brisbane, 2010, p.1667.
8. D.Q. Zhu, T.J. Chun, J. Pan, and X.M. Wei, Upgrading iron and removing phosphorus from high-phosphorus iron ore, J. Cent. South Univ. Sci. Technol., 42(2011), No. 3, p. 568.
9. J.Y. He, P. Zhou, G.Z. Zhuang, J.H. Du, J. Zhang, Y.B. Liu, and Z.H, Yang, Study on dephosphorization process for an ore of high phosphor, Yunan Metall., 36(2007), No. 6, p. 17.
10. P. Delvasto, A. Valverde, A. Ballester, J.A. Muñoz, F. González, M.L. Blázquez, J.M. Igual, and C. García Balboa, Diversity and activity of phosphate bioleaching bacteria from a high-phosphorus iron ore, Hydrometallurgy, 92(2008), No. 3–4, p. 124.10.1016/j.hydromet.2008.02.007 ↗
11. G.Z. Qiu, T. Jiang, and J.C. Xu, Direct Reduction of Coldbonded Pellets, Central South University Press, Changsha, 2001, p.125.
12. T. Jiang, M.D. Liu, G.H. Li, N. Sun, J.H. Zeng, and G.Z. Qiu, Effects of sodium-salt on Al-Fe separation by reduction roasting for high-aluminum content limonite, Chin. J. Nonferrous Met., 20(2010), No. 6, p. 1226.
13. D.W. Yang, T.C. Sun, H.F. Yang, C.Y. Xu, C.Y. Qi, and Z.X. Li, Dephosphorization mechanism in a roasting process for direct reduction of high phosphorus oolitic hematite in west Hubei Province, China, J. Univ. Sci. Technol. Beijing, 32(2010), No. 8, p. 968.
14. C.Y. Xu, T.C. Sun, C.Y. Qi, Y.L. Li, X.L. Mo, D.W. Yang, Z.X. Li, and B.L. Xing, Effects of reductants on direct reduction and synchronous dephosphorization of high-phosphorous oolitic hematite, Chin. J. Nonferrous Met., 21(2011), No. 3, p. 680.
15. Y.L. Li, T.C. Sun, C.Y. Xu, and Z.H. Liu, New dephosphorizing agent for phosphorus removal from high-phosphorus oolitic hematite ore in direct reduction roasting, J. Cent. South Univ. Sci. Technol., 43(2012), No. 3, p. 827.