کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6658927 | 1425526 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Conversion of chalcopyrite to copper oxide in hypochlorite solution for selective leaching of copper in dilute sulfuric acid solution
ترجمه فارسی عنوان
تبدیل کلوپوپییر به اکسید مس در محلول هیپوکلریت برای اشباع انتخابی مس در محلول اسید سولفوریک رقیق
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
In the present study, development of a novel oxidation route to convert chalcopyrite to tenorite for leaching of copper has been described. Initially chalcopyrite was converted into tenorite/copper oxide (CuO) under alkaline region using electro-generated chlorine as an oxidant. Various process parameters such as chlorine sparging rate, temperature, and reaction time were investigated. It was found that 93.8% chalcopyrite converted to tenorite at 60â¯Â°C in 300â¯min when chlorine sparging rate was 0.69â¯mmolâ¯minâ1 while, maintaining the pulp density of 10â¯g/L and pH of the solution between 11â12.7 using dilute sodium hydroxide solution. The oxidized sample containing tenorite phase was leached in dilute sulfuric acid solution at 30â¯Â°C and 10â¯g/L pulp density for 60â¯min. It was observed that pH of the solution plays a crucial role to enhance the selective recovery of copper. Almost 88% of copper along with 43.1% iron were leached out when pH of the leaching solution was varied between 0.9â1.2. However, negligible dissolution of iron with almost same percentage of copper leaching (88.2%) was observed with the solution having pHâ¯2.7â3.2. Enhanced copper leaching efficiency of up to 99.3% was achieved in the same pH range (2.7â3.2) at 60â¯Â°C within 30â¯min.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 178, June 2018, Pages 224-230
Journal: Hydrometallurgy - Volume 178, June 2018, Pages 224-230
نویسندگان
Pankaj Kumar Choubey, Jae-chun Lee, Min-seuk Kim, Hyung-Seok Kim,