Augmenting metal leaching from copper anode slime by sulfuric acid in the presence of manganese(IV) oxide and graphite

2021 ◽  
pp. 105745
Author(s):  
Kurniawan Kurniawan ◽  
Jae-chun Lee ◽  
Jonghyun Kim ◽  
Ha Bich Trinh ◽  
Sookyung Kim
Keyword(s):  
Sulfuric Acid ◽  
Metal Leaching ◽  
Anode Slime ◽  
Copper Anode ◽  
Copper Anode Slime

scholarly journals Leaching Kinetics of Selenium, Tellurium and Silver from Copper Anode Slime by Sulfuric Acid Leaching in the Presence of Manganese(IV) Oxide and Graphite

2021 ◽  
Vol 3 (1) ◽  
pp. 16
Author(s):  
Kurniawan Kurniawan ◽  
Jae-chun Lee ◽  
Jonghyun Kim ◽  
Rina Kim ◽  
Sookyung Kim
Keyword(s):  
Activation Energy ◽  
Sulfuric Acid ◽  
Chemical Reaction ◽  
Acid Leaching ◽  
Anode Slime ◽  
Surface Chemical ◽  
Copper Anode ◽  
Surface Chemical Reaction ◽  
Sulfuric Acid Leaching ◽  
Copper Anode Slime

Sulfuric acid leaching of copper anode slime (CAS) in the presence of manganese(IV) oxide (MnO2) and graphite was investigated for Se, Te and Ag recovery. The study reveals that the leaching of Se, Te and Ag was facilitated by the galvanic interaction with MnO2, and graphite played the role of a catalyst. The leaching process could yield 81.9% Se, 90.8% Te, and 80.7% Ag leaching efficiency when the conditions were maintained as 500 rpm, 2.0 M H2SO4, 0.8/0.8/1 MnO2/graphite/CAS, and 90 °C temperature. The kinetic study showed that Se leaching followed the surface chemical reaction at all the tested temperature range (25–90 °C) with the activation energy of 27.7 kJ/mol. Te and Ag leaching at temperature 25–50 °C followed the mixed and surface chemical reaction models, respectively, and changed to fit the diffusion and mixed control models, respectively, in the temperature range 60–90 °C with the corresponding activation energy of 17.8 and 12.2 kJ/mol.

scholarly journals Extraction of platinum and gold from copper anode slimes by a process of chlorinating roasting followed by chlorinating leaching

2020 ◽  
Vol 56 (2) ◽  
pp. 193-202
Author(s):  
S. Wang ◽  
L. Li ◽  
S.-D. Wang ◽  
H. Wang ◽  
G.-D. Wu
Keyword(s):  
Sulfuric Acid ◽  
Sodium Chloride ◽  
Recovery Rate ◽  
Anode Slime ◽  
Copper Anode ◽  
A Value ◽  
Copper Anode Slime ◽  
Roasting Process ◽  
Concentrated Sulfuric Acid ◽  
Traditional Process

A novel process of chlorinating roasting followed by chlorinating leaching to extract platinum and gold from copper anode slimes was proposed in this research. Results of thermodynamic analysis and experimental research showed that the platinum was chlorinated into PtCl2 while the gold existed in the form of metallic Au during the roasting process. With the copper anode slime being directly leached using a traditional process, the Pt recovery rate was low and came to 80.72%. After the roasting process with sodium chloride and concentrated sulfuric acid in oxygen atmosphere, the recovery rate of Pt increased to a value around 95%. Moreover, with excessive addition of concentrated sulfuric acid, more H2O (g) was generated and the formation of Cl2 (g) decreased due to the transition from HCl (g) and Cl2 (g), as a result of which the Pt recovery rate decreased. In addition, this chlorinating roasting had little effect on the Au recovery due to its difficulty to be chlorinated.

A novel process for extracting tellurium from the calcine of copper anode slime via continuous enrichment

2020 ◽  
Vol 264 ◽  
pp. 121637
Author(s):  
Weifeng Liu ◽  
Rui Jia ◽  
Baiqi Sun ◽  
Duchao Zhang ◽  
Lin Chen ◽  
...  
Keyword(s):  
Anode Slime ◽  
Copper Anode ◽  
Copper Anode Slime ◽  
Continuous Enrichment

Selective Separation and Recovery of Valuable Metals by Vacuum Distillation of Copper Anode Slime Flotation Tailings

JOM ◽  
2019 ◽  
Vol 71 (7) ◽  
pp. 2413-2419 ◽  
Author(s):  
Guozheng Zha ◽  
Bin Yang ◽  
Chongfang Yang ◽  
Xinyu Guo ◽  
Wenlong Jiang
Keyword(s):  
Vacuum Distillation ◽  
Selective Separation ◽  
Anode Slime ◽  
Copper Anode ◽  
Flotation Tailings ◽  
Copper Anode Slime ◽  
Valuable Metals
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