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anode slime leaching with thiourea

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v116n12a9 Extraction of copper and gold from anode slime ...

For the extraction of copper by leaching, the anode slime was heated and stirred with 4 M sulphuric acid in the presence of oxygen. Optimal conditions for recovery of copper were temperature 80°C, mixing time 5 hours, and oxygen flow rate 2 L/min, resulting in a copper recovery of %. Silver and selenium were dissolved by leaching anode slime

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OXIDATIVE PRESSURIZED ACID LEACHING OF WASTE …

leaching experiment, the pressure was decreased, autoclave cooled down and the leach residue filtered, washed and dried. Table 2. Test conditions for pressurized WPCB leaching (tests 1–10), pressurized anode slime leaching (tests 11, 12), atmospheric WPCB leaching (tests 13–16) and pressurized PS leaching (tests 17–20)

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Copper anode slimes processing equipment

The process involved the leaching of anode slime in sulfuric acid medium Recovery of Silver and Gold from Copper Anode anode slime leaching with thiourea live chat Saimm 201612 dec by SAIMM Saimm 201612 dec in sulphuric acid leaching of copper anode slime copper anode slime was dissolved in thiourea solution and a positively .

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Lead leaching mechanism and kinetics in electrolytic ...

anode slime was reduced and obtained in a sulfuric acid mixture (Wei et al., 2017). The extent of manganese leaching in anode slime was> 99%. The content of lead, whose form was mainly lead sulfate, was larger than 43% after the anode slime was concentrated and leached. Shu et al. (2017) found that the main forms of manganese in anode

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Gold recovery using porphyrinbased polymer from ...

Feb 20, 2020· For example, thiourea is known to be a good leaching agent particularly in the presence of oxidants such as hydrogen peroxide or ferric ion (Li and Miller, 2006, Olyaei et al., 2019), and the thiosulfate leaching process is facilitated with ammonia and copper (Tamayo et …

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

Typical thiourea leach residue analysis..... 6 7. Effect of residue pulp density ... current density of 100 A/m2 • Spent FeCl3 leach solution was reoxidized in the anode compartment at a current efficiency between 75 and 95 pct. 'Group supervisor. 2Research supervisor. Salt Lake City Research Center, Bureau of Mines, Salt Lake City, UT. ...

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PROCESSING OF COPPER ANODESLIMES FOR EXTRACTION …

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+.

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Anode Slime Gained During Electrolysis Process of ...

(Thiourea and gelatin ) etc.[4] Characteristics of the Secondary Copper Anodes ... 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.

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Development of a hydrometallurgical process for the ...

Mar 20, 2019· In order to recover gold and silver from anode slimes containing Cu, Ni, Sn, and Zn, an integrated hydrometallurgical process consisting of leaching, solvent extraction, and cementation was developed. All the metals together with 10% of Ag(I) were dissolved by the mixture of HCl and H2O2 at the optimum conditions. Separation of Au (III) together with Sn (II) was performed by Cyanex 272 from ...

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acid leaching inorganic

Leaching experiments of anode slime were performed with several inorganic acids (HCl, HNO_3 and H_2SO_4) together with thiourea and thiosulfate solution to recover gold and silver. Gold was not. Effects of torrefaction and organicacid leaching.

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EFFECT OF OXIDIZING AGENTS IN EXTRACTING GOLD FROM ANODE SLIME

Extraction of gold, silver and copper from the copper electrorefining anode slime; separation of the metals, Global Symposium on Recycling, Waste Treatment and Clean Technology. Hait, J., Jana, R., Vinay, and Sanyal S., 2002. Some studies on sulfuric acid leaching of anode slimes with additives, Industrial Engineering Research, 41, 65936599.

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Gold recovery using porphyrinbased polymer from ...

Feb 20, 2020· Thiourea solution was prepared with M of sulfuric acid for a goldthiourea ligand, and the concentration of thiourea was varied (, , and M) (Jingying et al., 2012, Syed, 2012). One hundred milligrams of the goldadsorbed polymer were added in 100 mL of the leaching solutions mentioned above so that the solid/liquid ratio was ...

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Electrowinning Wikipedia

Electrowinning, also called electroextraction, is the electrodeposition of metals from their ores that have been put in solution via a process commonly referred to as leaching. Electrorefining uses a similar process to remove impurities from a metal. Both processes use electroplating on a large scale and are important techniques for the economical and straightforward purification of non ...

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PRESSURE LEACHING OF DECOPPERIZED COPPER …

experiments. For each test 160, 240 or 320 g of anode slime was weighed and fed into the reactor chamber along with sulfuric acid. The solid concentrations were chosen according to Doucet and Stafiej (2007) who used the range from 27 to 35%. In order to achieve the optimal leaching conditions, an agitation speed of 400 rpm was used to

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Copper Anode Slime RecoveryCopper Metalcess

The chloride leaching solution of lead anode slime is used to recover Cu/ Bi/Sb separately. As a conclusion, it is widely acknowledged that the anode slime is complex in content but of high value, and the tendency to utilize the anode slime is to shorten recovery process and production period, reduce circulating loss and increase recovery rate.

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Ferric Chloride Thiourea Brine Leaching to Recover ...

table 4, was used in the thiourea leaching investigation to extract gold and silver. Generally, the test procedure consisted of mixing 10 g of FeCl3 leach residue in 250 mL of leach solution containing 20 g/L thiourea and g/L H2SO4, leaching for 3 h at 40° C, then …

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Chapter L HYDROMETALLURGY SOLUTION MINING

recovery of precious metal from anode slime occurs in alternative leaching agent (Wk wang et al.,1981). Most common leaching agent used in gold salvation in anode slime in aqueous media such as aqua regia (Wk Wang et al,1981), cyanide (Su Jianhua et al, 2002), thiourea (Omer Yavuz et al, 2007),

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Stephen FOLEY, et al. : Gold Extraction Rex Research

The resulting data obviously shows almost completely extraction of gold and palladium from copper anode slime. EXAMPLE 10 Following 2 time leaching of kg copper anode slime said in example 9, with L of nitric acid (9 M) at 85° C. for 4 hours, the residue was washed with L of water.

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Copper, nickel and tellurium yields during leaching of ...

A washing experiment with leached slime shows that the observed occasional high copper content of the leached slime more likely is due to an insufficient washing rather than lack of dissolution during the leaching. Place, publisher, year, edition, pages 2010. Keywords [en]

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

Apr 27, 2007· 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 the gold with thiourea, it is necessary to first remove the copper, selenium, tellurium, and most of the silver from the mixture.

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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.

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US9630844B2 Hydrometallurgical process for the recovery ...

A hydrometallurgical process is provided for the recovery of tellurium as elemental tellurium powder from copper refinery anode slime containing high amount of lead. The process involves the removal of copper and lead from anode slime followed by the recovery of tellurium as elemental powders. An economical and environment friendly process is provided for producing tellurium from a high lead ...

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