کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212384 462047 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physicochemical factors affecting leaching of laterite ore in hydrochloric acid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Physicochemical factors affecting leaching of laterite ore in hydrochloric acid
چکیده انگلیسی

The effect of physicochemical factors on laterite ore leaching in hydrochloric acid was investigated in this study. The results showed that the valuable metals such as nickel and cobalt could be extracted effectively at the leaching conditions as follows: acid concentration was 8 mol/L, the particle size of samples were 100% passing 0.15 mm, the stirring speed was 300 rpm, leaching temperature was 353 K, S/L ratio was 1:4 and leaching duration was 2 h. The extraction of nickel and iron presented a linear correlation, which demonstrated nickel associated in iron ore, and cobalt dissolution was not consistent with iron dissolution which indicated that the distribution of cobalt were not uniform in the iron oxide crystals and existed in other minerals, and this result had also been demonstrated by mineralogical studies. To investigate the stability of different minerals in the leaching condition listed above as well as the influence of nickel and cobalt on their dissolution in such condition, the minerals dissolution order was studied by X-ray diffraction (XRD) according to determination of the leaching residues and chemical composition of the leaching solution, and the result order was goethite > lizardite > magnetite > hematite.


► The leaching conditions in hydrochloric acid were investigated in this study.
► Nickel and cobalt were extracted mostly while iron extraction was suppressed.
► The stability of minerals and the influence of metal dissolution were investigated.
► The minerals dissolution order was studied through XRD determination and analysis.
► The dissolution mechanism was discussed in this paper.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volumes 129–130, November 2012, Pages 14–18
نویسندگان
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