کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4769312 | 1425535 | 2017 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of thermal pre-treatment on the dissolution of chalcopyrite (CuFeS2) in sulfuric acid media
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Chalcopyrite ore was roasted at 200, 550 and 800 °C in reducing (5%H2/95%Ar) and inert (N2) atmospheres to examine the effects of the thermal pre-treatment on the phase mineralogy and on subsequent copper extraction using sulfuric acid media. No mineralogical changes occurred in the pre-leached samples heated to 200 °C under both inert and reducing conditions while at 550 °C partial decomposition of chalcopyrite resulted forming bornite and metal-rich derivatives talnakhite and mooihoekite. Further heating to 800 °C saw differences in chalcopyrite decomposition according to the atmosphere. In the inert atmosphere chalcopyrite decomposed to the metal-rich derivatives and minor bornite and geerite while in the reduced atmosphere copper metal, bornite, troilite, cubanite and chalcocite formed. Leaching at 50 °C of the chalcopyrite pre-treated in an inert atmosphere saw a slight increase in %Cu extraction with increasing temperature of treatment. A maximum copper extraction of 16%Cu was measured in the sample treated at 800 °C. Leaching of the chalcopyrite pre-treated in a reduced atmosphere led to modest increases in copper extraction between the 200 °C and 550 °C samples with 21%Cu and 24%Cu leached. Treatment at 800 °C resulted in a significant increase reaching 78%Cu extraction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 169, May 2017, Pages 68-78
Journal: Hydrometallurgy - Volume 169, May 2017, Pages 68-78
نویسندگان
Nebeal Faris, Rahul Ram, Miao Chen, James Tardio, Mark I. Pownceby, Lathe A. Jones, Scott McMaster, Nathan A.S. Webster, Suresh Bhargava,