By Tao Jiang,Jiann-Yang Hwang,Patrick Masset, et al.John Wiley & Sons, Inc.|Wiley||Wiley-TMSAdult NonfictionTechnologyLanguage(s): EnglishOn sale date: 02.08.2012Street date: 09.05.2012Preview

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1%) by reduction roasting acid leaching was developed, using sulfur as reducing agents. 50, and a high leaching efficiency above 95% was obtained the optimal conditions. (3) The reduction reactions of Mn0 2 by sulfur happened at a relatively low temperature and the speed was very fast. It was a promising process for utilizing the low-grade manganese ores compared with the traditional coal-based reduction roasting method. Acknowledgements The authors want to express their thanks to National science fund for distinguished young scholars (No.

Hockridge, "Optimization of Nickel Extraction from Latérite Ores by High Pressure Acid Leaching with Addition of Sodium Sulphate," Minerals Engineering, 18 (2005), 1297. 4. E. Sc, thesis, Middle East Technical University, 2008). 5. R. Burkin, Extractive Metallurgy of Nickel (New York, NY: John Wiley & Sons, 1982). 6. Michael Widmer, "Nickel Pig Iron in China" (Report, Bank of America-Merrill Lynch, 2009). 7. P. Das, "Global Scenario for the Extraction of Nickel from Lateritic Nickel Ore and Sukinda Deposit" (Paper presented at the International Seminar on Development of Nickel and PGM Resources, Bhubaneswar, India, 27-28 November 2010).

This can be explained thermodynamically that AG? values of 29 the reactions of MnÜ2 reduced by sulfur are much less than zero, presented in Figure 4. The suitable reduction time of 10min should be chosen at 550 °C. Figure 6. Effects of S/Mn Mole Ratio on the Leaching Efficiency of Mn Figure 7. 50 and roasting temperature between 350 °C - 650 °C. It can be observed that lithiophorite ((Al, Li)Mn02(OH)2) in the sample manganese ores disappeared whereas new manganese phases, including MnSC>4, MnS and MnO, appeared after the samples are roasted with sulfur.

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3rd International Symposium on High Temperature Metallurgical Processing by Tao Jiang,Jiann-Yang Hwang,Patrick Masset, et al.John Wiley & Sons, Inc.|Wiley||Wiley-TMSAdult NonfictionTechnologyLanguage(s): EnglishOn sale date: 02.08.2012Street date: 09.05.2012Preview


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