Open AccessStudy on Gold Extraction Process of Printed Circuit Board Based on Thiourea Method
Author(s) -
Chao Deng,
Peng Xiang,
Longjiang Liu,
Yao Huang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/3/032093
Subject(s) - leaching (pedology) , printed circuit board , thiourea , dissolution , gold extraction , extraction (chemistry) , hydrometallurgy , materials science , chemistry , metallurgy , nuclear chemistry , inorganic chemistry , environmental science , engineering , chromatography , electrical engineering , organic chemistry , soil science , cyanide , soil water
The printed circuit board is rich in recyclable metals Cu, Au, Ag, Pt, Pb, etc. The precious metals such as gold are extracted from it, which is in line with the concept of resource recycling. In this paper, the theorem method was used to extract gold from waste circuit boards. The effects of reaction time, reaction temperature, theorem concentration, and Fe3 + mass concentration on gold leaching rate were investigated. The results showed that the pH was controlled at about 1, the theorem concentration was 0.12 mol/L, FeCl3 was 0.024 mol/L, the stirring speed was 300 r/min, and the leaching time was 2 h. Under the above conditions, the gold leaching rate reached 90.37 %. The theorem gold extraction method has certain potential application values due to its rapid gold dissolution, low toxicity during leaching, low price, high efficiency, and environmental protection.