The Study on the Mineral Phase Transformations and Thermodynamics of Laterite Ores Calcination
In this paper, mineralogical phase transformations of Indonesia nickel laterite ores are studied during calcinations, the thermodynamics of process are also investigated.Different factors that affect the reduction of the laterite ores are tested and analyzed by Differential Scanning Calorimeter(DSC), X-ray Diffraction(XRD), Brunauer Emmett Teller (BET) and Scanning Electron Microscope(SEM).The results show that during calcination process, goethite is dehydrolyzed by removing structural water at about 300℃, which then transforms to hematite, and serpentine decomposes at around 600~700℃, leading to formulate olivine if agglomerating at higher temperature.By thermodynamics calculation, the goethite dehydration temperature is under 100℃, and about 200℃ for serpentine decomposition.It might be the inclusions in ore which make laterite become hard to decompose.
nickel laterite ore phase transformation thermodynamics
Yu Ling Xu Song Chen Shu Qiang Guo Yu Yang Bian Wei Zhong Ding Ding Sheng Tan
Shanghai Key Laboratory of Modem Metallurgy and Materials Processing,Shanghai University,Shanghai 200072,China
国际会议
香港
英文
250-254
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）