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3rd International Symposium on High-Temperature by Tao Jiang, Jiann-Yang Hwang, Patrick Masset, Onuralp Yucel,

By Tao Jiang, Jiann-Yang Hwang, Patrick Masset, Onuralp Yucel, Rafael Padilla, Guifeng Zhou

Proceedings of a symposium backed via the Pyrometallurgy Committee and the power Committee of the Extraction and Processing department of TMS (The Minerals, Metals & fabrics Society)

Held through the TMS 2012 Annual assembly & Exhibition Orlando, Florida, USA
March 11-15, 2012

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65% of metallic nickel is used in stainless steel, 12% is consumed as superalloy and non ferrous alloy because of its superior corrosion and high temperature properties [1]. Nickel is a transition metal that is minedfrommainly two types of ore deposits as sulphide ores and lateritic ores. Although 73% of nickel ores are latérites, 55% of primary production is from sulphide ores [1, 2]. The importance of lateritic ores is increasing due to the increase in nickel prices and decrease in reserves of sulphide ores.

The molded mass can then be removed in one piece. It is a very useful technic in post experimental studies, to cut the entire furnace in slices, and subsequently drill out samples from decided positions for analysis. Figure 2 shows a typical cross section of the furnace after ended experiment and a schematic overview of the different reaction zones. Figure 2: Typical cross section of pilot furnace after ended experiment and a schematic overview of the different reaction zones (not from the current experiment) /4/.

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. Compared all the XRD patterns, it was found that MnS04 existed at all roasting temperatures, however, the diffraction peak of MnS04 in reduced residues at lower temperature (< 500 °C) is stronger than that at higher temperatures (> 550 °C), which was in accordance with the water leaching efficiency presenting a decline tendency above 550 °C.

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