کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212676 462061 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Zinc recovery from franklinite by sulphation roasting
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Zinc recovery from franklinite by sulphation roasting
چکیده انگلیسی

Residues from the zinc roast–leach–electrowin process contain zinc mainly as finely dispersed particles of franklinite. Thus, floatation, sulfuric acid leaching, and alkali leaching are ineffective methods for zinc extraction. An efficient technique was used for the extraction of zinc from hydrometallurgical zinc residues by sulfate roasting of a residue–sulfur–oxygen–H2O mixture followed by water leaching. The effects of various parameters, such as roasting temperature/time, the sulfur amount, leaching time/temperature, and liquid/solid ratio on zinc leaching were studied. Systematic studies indicate that high zinc leaching rate can be achieved under the following conditions: sulfur addition, 1.2 times theoretical value; duration, 2 h; temperature, 250 °C at roasting stage; and room temperature, liquid/solid ratio 4, and duration time 0.5 h at leaching. X-ray diffraction analysis indicates that the zinc-containing compounds convert into water-soluble zinc sulfate after roasting.


► Zinc residues contain zinc mainly as finely dispersed particles of franklinite.
► A efficient technique was used for the extraction of zinc by sulfate roasting-water leaching.
► High zinc leaching rate of 85% can be achieved under the optimum condition.
► The zinc-containing compounds convert into water-soluble zinc sulfate after roasting.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 109, Issues 3–4, October 2011, Pages 211–214
نویسندگان
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