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Comparative Leaching Study on Conichalcite and Chalcopyrite Under Different Leaching Systems
Jiajia Wu, Junmo Ahn, Jaeheon Lee
Korean J. Met. Mater. 2019;57(4):245-250.   Published online 2019 Apr 5
DOI: https://doi.org/10.3365/KJMM.2019.57.4.245

Abstract
Copper leaching from low-grade copper ore samples obtained from two active mines in the US, named conichalcite (sample A) and chalcopyrite (sample B), were studied under different leaching conditions using sulfuric acid and methane sulfonic acid (MSA). The conichalcite, sample A, is calcium-copper arsenite hydroxide [CaCu(AsO4)(OH)] with small amount of..... More

                        
Improvement of Alumina Dissolution from the Mechanically Activated Dross Using Ultrasound-Assisted Leaching
Thi Thuy Nhi Nguyen, Man Seung Lee
Korean J. Met. Mater. 2019;57(3):154-161.   Published online 2019 Feb 14
DOI: https://doi.org/10.3365/KJMM.2019.57.3.154

Abstract
Aluminum dross results from the re-melting of used aluminum cans, and is a valuable resource containing alumina. In general, aluminum dross contains oxides of Al, Ca, Fe, Mg, Si and Ti and some salts. As a continuation of the previous work to recover pure alumina from the dross, the effect..... More

                        
Leaching of Silver (Ag) from Electronic Scrap by Thiourea
전자스크랩으로부터 티오요소에 의한 은(Ag) 침출
Hong-Il So, Joo-eun Lee, Yeon-Chul Cho, Jae-Woo Ahn, Ho-Jin Ryu
소홍일, 이주은, 조연철, 안재우, 류호진
Korean J. Met. Mater. 2018;56(7):511-517.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.511

Abstract
The leaching behavior of silver from electronic scrap using acidic thiourea solution was studied. The results showed that the silver leaching percentage was affected by the concentration of thiourea and hydrochloric acid, the oxidant such as ferric ions, solid-liquid ratio, temperature, rpm, etc. The leaching percentage of silver decreased with..... More

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