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Improvement of Copper Metal Leaching in Sulfuric Acid Solution by Simultaneous Use of Oxygen and Cupric Ions

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Title: Improvement of Copper Metal Leaching in Sulfuric Acid Solution by Simultaneous Use of Oxygen and Cupric Ions
Authors: Yoo, Kyoungkeun Browse this author
Park, Yujin Browse this author
Choi, Sanghyeon Browse this author
Park, Ilhwan Browse this author →KAKEN DB
Keywords: copper
cupric ion
sulfuric acid
Issue Date: Jun-2020
Publisher: MDPI
Journal Title: Metals
Volume: 10
Issue: 6
Start Page: 721
Publisher DOI: 10.3390/met10060721
Abstract: A new concept for copper (Cu) metal leaching by the simultaneous use of cupric ions (Cu2+) and oxygen (O-2) was proposed to improve Cu metal leaching in sulfuric acid. According to this concept, Cu(2+)oxidizes Cu metal into cuprous ion (Cu+), and O(2)oxidizes Cu(+)into Cu2+. The improvement in Cu leaching efficiency from Cu metal was investigated experimentally in the sulfuric acid solution using Cu(2+)and O(2)simultaneously. Furthermore, the result was compared with that for the sulfuric acid solution containing neither Cu(2+)nor O(2)and with the sulfuric acid solution without Cu(2+)and O-2. When both Cu(2+)and O(2)were used in the leaching solution, the leaching rate of Cu from Cu metal powder was higher than at other leaching conditions, and the leaching efficiency of Cu increased to more than 99.9% in 1 mol/L sulfuric acid solution at 400 rpm and 50 degrees C with <= 75 mu m Cu metal powder, 1% pulp density, 10,000 mg/L initial Cu(2+)concentration, and 100 cc/min O(2)introduction. These results indicated that the leaching of Cu from Cu metal could be accelerated by adding Cu(2+)and O(2)in the sulfuric acid solution.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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