Leaching behavior of metals from chlorinated limonitic nickel laterite

作者：Fan Chuanlin^*; Zhai Xiujing; Fu Yan; Chang Yongfeng; Li Binchuan; Zhang Ting an

来源：International Journal of Mineral Processing, 2012, 110: 117-120.

DOI：10.1016/j.minpro.2012.04.002

• Nickel laterite
• Selective chlorination
• Ferrous chloride
• Leaching
• pH value

The leaching behavior of metals from pre-reduced limonitic nickel laterite was studied using a selective chlorination-leaching process with ferrous chloride tetrahydrate as chloride agent. The effects of parameters in selective chlorination and leaching process were investigated. It was found that the optimum conditions for selective chlorination were chloride agent addition of 40 wt.% and time of 150 min at 460 degrees C. Liquid/solid ratio in leaching process, leaching time and temperature had little influence on metal extraction. As the initial pH value of leaching solution decreased from 6.85 to 1.00, the extractions of Fe, Ni, Co, Al, Cr and Mn increased slightly while that of Mg increased from 36.98% to 43.23%. Under the determined conditions, 91.78% Ni, 87.64% Co, <2% Fe, 2.53% Al, <1% Cr, 36.98% Mg and 63.04% Mn were leached by water. The chlorinated ore and leaching residue were characterized by X-ray diffraction and scanning electron microscope.

• 出版日期2012-7-18
• 单位东北大学