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US4283224A - Separative treatment of anode slime - Google ...

A hydrometallurgical process is provided for the separative treatment of electrometallurgical anode slime containing precious metals and substantial amounts of tin dioxide and lead sulfate. The process is especially suited for treatment of anode slimes from the electrorefining of secondary copper to recover about 85% of the metal value contained therein, especially tin .

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Optimization of the synergy between reduction leaching of ...

2019-12-06· A new process for extracting gold from refractory gold ore and manganese from manganese anode slime was developed by combining the oxidative pretreatment of refractory gold ore and reductive leaching of manganese anode slime. The response surface methodology was used to optimize the effects of time, temperature, and sulfuric acid concentration on the leaching .

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US4283224A - Separative treatment of anode slime - Google ...

A hydrometallurgical process is provided for the separative treatment of electrometallurgical anode slime containing precious metals and substantial amounts of tin dioxide and lead sulfate. The process is especially suited for treatment of anode slimes from the electrorefining of secondary copper to recover about 85% of the metal value contained therein, especially tin and precious metals.

256

Some Studies on Sulfuric Acid Leaching of Anode Slime with ...

2002-11-13· The process involved the leaching of anode slime in sulfuric acid medium. At room temperature, sulfuric acid leaching without any additive resulted in poor recoveries of metals other than copper. With the addition of MnO 2 to the leaching system at room temperature, an increase in the recovery values of copper, selenium, and tellurium was found.

282

Recovery of Gold and Silver from Copper Anode Slime ...

This study has shown that gold and silver can be recovered from a complex anode slime containing copper, selenium, and tellurium, but a carefully planned leaching procedure is required. To extract...

435

EFFECT OF OXIDIZING AGENTS IN EXTRACTING GOLD FROM ANODE SLIME

Extracting the gold from anode slime had been attempted in the laboratory by applying wet chlorination method. Sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2) served as the oxidizing agents. Effects of various parameters such as solvent concentration, leaching time and temperature on the percent extraction of gold were studied. The optimum recovery of gold with .

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cost of copper electrorefining anode slime processing

The anode slime is collected in anode bags around the dissolving anode. Under optimal conditions, only fine silver (purity > 99.9 %) will deposit on the cathode. An advantageous condition for the electrolytic deposition of Ag is the large potential difference between Ag20 and . Get Price. ELECTROREFINING OF GOLD . Nov 28, 2019 · Electrowinning, also called electroextraction, is the ...

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PROCESSING OF COPPER ANODE-SLIMES FOR EXTRACTION OF .

Processing of anodic slimes from an Egyptian copper electrorefining plant, exhibiting high contents of copper, lead, tin and silver has been presented. The proposed hydrometallurgical process consists of two leaching stages for extraction of copper with H2SO4– O2and silver with thiourea – Fe3+.

26

Using thiourea ligand of gold-thiourea complex to facile ...

2015-07-22· Thiourea can form cationic complex with gold in gold extraction process of copper anode slime. Silica nanoparticles were used as cores and their surface was coated by a cationic gold-thiourea solution. The electrostatic interaction between negatively charged silica surface and positively charged cationic gold solution leads to formation of core–shell nanostructures directly. Thiourea .

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EXTRACTING SILVER FROM ANODE SLIME AFTER LEAD AND .

leaching the anode slime by hydrochloric acid to remove the tin component. As silver is practically not dissolved in this, tin nitric acid can be leached from the residue by such a medium. Copper, which was not dissolved in the hydrochloric acid leaching step may also follow silver. Precious metals extraction had been accomplished by many researchers. (Hait et al., 2002; .

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Recovery of Silver, Gold, and Lead From a Complex Sulfide ...

Subsequent acid thiourea leaching, for 1 to 3 h at 40° C, extracted about 85 pct of the gold and silver. Lead chloride was solubilized from the remaining residue with .

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US8663584B2 - Method and technique employing a novel ...

The resulting solutions can be obtained from leaching many types of material such as copper anode slimes, the treatment of scrap such as electronic circuit boards and plating effluents, PGM, or refractory gold ores. An extraction component enabling the concurrent recovery of gold and/or palladium selectively from a hydrochloric acid media containing the base metals and other contaminants. The ...

571

Some Studies on Sulfuric Acid Leaching of Anode Slime with ...

2002-11-13· The process involved the leaching of anode slime in sulfuric acid medium. At room temperature, sulfuric acid leaching without any additive resulted in poor recoveries of metals other than copper. With the addition of MnO 2 to the leaching system at room temperature, an increase in the recovery values of copper, selenium, and tellurium was found.

481

OXIDATIVE PRESSURIZED ACID LEACHING OF WASTE PRINTED ...

With anode slime reference tests (11 and 12) the same pressure leaching procedure was used at 100 and 160 °C. PS leaching was carried out in pressurized environment at 150 °C. Oxidative pressure acid leaching tests were conducted in a Büchi Ecoclave 075 (Ti gr. 2) with a volume of 1.1 dm3and with solution volume of 0.8 dm3.

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mupani pper mines and anode slimes

mupani copper mines and anode slimes - domaine mupani copper mines and anode slimes. Major Mines Projects Mufulira Mine. Mopani Copper Mines Plc is a Zambian

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Anode Slime Gained During Electrolysis Process of ...

Before the leaching, the decoppered anode slime was washed several times, filtered and then dried at laboratory in the respective types of equipment. Samples of the dried anode slime are given in Fig. 4. XRD and XRF Anode Slime Analyses The characterization of the representative sample of anode slime composition was carried out by two

22

Anode Slime Gained During Electrolysis Process of ...

Before the leaching, the decoppered anode slime was washed several times, filtered and then dried at laboratory in the respective types of equipment. Samples of the dried anode slime are given in Fig. 4. XRD and XRF Anode Slime Analyses The characterization of the representative sample of anode slime composition was carried out by two

549

Comprehensive recoveries of selenium, copper, gold, silver ...

2020-08-01· This paper presents a clean and economical hydrometallurgical process for recovering valuable elements from a copper anode slime, and the flowchart is shown in Fig. 1.First, H 2 SO 4-H 2 O 2 solution was used for dissolving selenium and copper, and they were successively recovered from leaching solution by Na 2 SO 3 reduction and iron powder replacement. Then, NaClO 3-H 2 SO 4 .

492

EFFECT OF OXIDIZING AGENTS IN EXTRACTING GOLD FROM ANODE SLIME

Extracting the gold from anode slime had been attempted in the laboratory by applying wet chlorination method. Sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2) served as the oxidizing agents. Effects of various parameters such as solvent concentration, leaching time and temperature on the percent extraction of gold were studied. The optimum recovery of gold with .

35

Stephen FOLEY, et al. : Gold Extraction - Rex Research

Following 2 time leaching of 1.5 kg copper anode slime said in example 9, with 1.5 L of nitric acid (9 M) at 85° C. for 4 hours, the residue was washed with 0.4 L of water. The solid phase after drying mixed with 1.5 L of hydrochloric acid and 0.5 of water. Then 0.5 L of hydrogen peroxide was added gradually to the mixture and the temperature of the liquid was maintained at 70° C. .

386

Processing of copper anodic-slimes for extraction of ...

2003-01-01· Thiourea leaching of silver appears to be a good potential application to treat slimes containing silver to recover silver. The low toxicity of thiourea compared to cyanide is one of the motivations for developing the research in this field. Using concentration of thiourea of 10 g/l, under temperature 60 °C in 30 min leaching time, 92.2% of silver is extracted. Smelting of .

522

Recovery of Gold and Silver from Tin-Rich Slag: Mineral ...

The slag is mixed with NaCl, NaOH and/or Na 2 CO 3, and roasted at 400°C ∼ 800°C to obtain calcine containing water soluble salts of tin and antimony. After leaching with water, the residue consisting of PbO, Au, and Ag is sent back to extract gold and silver with current techniques in the plant.

284

Some Studies on Sulfuric Acid Leaching of Anode Slime with ...

2002-11-13· Leaching of gold and silver from anode slime with a mixture of hydrochloric acid and oxidizing agents. Geosystem Engineering 2017, 20 (4), 216-223. DOI: 10.1080/12269328.2017.1278728. Xue-jiao Li, Hong-ying Yang, Zhe-nan Jin, Lin-lin Tong, Fa-xin Xiao. Selenium Leaching from Copper Anode Slimes Using a Nitric Acid–Sulfuric Acid .

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Gold recovery from copper anode slime by means of ...

2014-03-01· Thiourea powder, hydrogen peroxide (30%) (as the oxidizing agent), and sulfuric acid (98%) (for pH adjustment) were used for gold leaching with thiourea. In the next step, 5 g of the pretreated copper anode slime was added to the thiourea solution, and the resulting solution was then stirred for 24 h at 500 rpm.