Alkaline Hydrothermal Treatment and Leaching Kinetics of Silicon from Laterite Nickel Ore
Alkaline Hydrothermal Treatment and Leaching Kinetics of Silicon from Laterite Nickel Ore
复制标题
红土镍矿中硅的碱性水热处理及浸出动力学
DOI:
10.1007/s42461-021-00518-4
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发表时间:
2021-12
期刊:
影响因子:
--
通讯作者:
Chang Longjiao
中科院分区:
文献类型:
--
作者:
Chang Longjiao
A new process of extracting silica from laterite nickel ore by hydrothermal treatment with sodium hydroxide as reaction auxiliary agent was proposed. The mineralogical transformation and silicon extraction kinetics of laterite nickel ore in alkaline hydrothermal treatment were studied. The effects of reaction temperature (175 ~ 250℃), molar ratios of sodium hydroxide to ore (1.05 ~ 1.2:1), and laterite nickel ore particle size (44 ~ 178 μm) on the extraction ratio of silica were investigated by using the shrinking core model. The results show that the extraction ratio of silica increases with the increase of reaction temperature, sodium hydroxide to ore molar ratio, reaction time, and the decrease of raw ore particle size. The kinetic analysis shows that the separation of silica in laterite ore can be described by internal diffusion model. The apparent activation energy (Ea) of the reaction was 8.87 kJ mol−1, and the kinetic modeling was established.
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期刊:
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