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anode slime leaching with thiourea

Mineralogical Characteristics of Copper Electrorefining

Apr 02, · A new approach for the treatment of copper electrorefining anode slime based on hydrometallurgical route involving sulfuric acid leaching with additives such as manganese dioxide and sodium chloride has been developed at National Metallurgical Laboratory (NML), Jamshedpur, India. Mineralogical characterization of the anode slime and the residues after various leaching treatments, .

Gold recovery from copper anode slime by means of

Mar 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.

Fundamental studies of the anodic behavior of thiourea in

The behavior of thiourea in the anodic process of copper electrorefining was investigated using various advanced electrochemical techniques with a view to establishing an accurate method to determine its effect on the anode process in certain highly concentrated copper sulfatesulfuric acid electrolytes. It was found that thiourea acted as an inhibitor hindering the anodic dissolution of copper

for recovery Hydrometallurgical

Keywords : Anode slime, Characterization of anode slime, Leaching, Recovery of vauable metals. INTRODUCTION Anode slime is the insoluble product deposited at the bottom of the electrorefining tank at the time of electrorefining of copper. It contains valuable 216

How to Recover Lead from Scrap Batteries

Aug 27, · A firm and adherent slime blanket was obtained on anodes cast into a steel mold heated to 250° C, which was aircooled to give a grain structure of approximately 1.30cm diam (fig. 8B). The quality of the slime blanket was further improved by melting the lead metal at 480° C and holding the melt at temperature for 2 h before pouring.

Recovery of metals from chloride leach solutions of anode

Sep 01, · Anode slime produced in a Korean metal recycling plant, contained gold, silver, copper, nickel, tin and zinc ().In order to recover the gold and silver from the anode slime, the metals in anode slime are dissolved in concentrated hydrochloric acid solutions at 90 °C in the presence of an oxidizing agent (H 2 O 2, HNO 3, NaClO) (Xing and Lee, ).

The Extraction of Gold from Ewaste by Hydrometallurgy

The Effect of Temperature: the conducted analyses and the comparison of them with other researchers' results [11, 12, and 13] in the field of extraction of colorful metals in temperatures of 60, 80, and 100 degrees Celsius showed that as the temperature increases, so does gold dissolution; however, it is not as dramatic as the status of gold extraction from anode sludge.

Recovery of Silver and Gold from Copper Anode Slimes, JOM

Sep 11, · It was then followed by alkaline roasting roasting, and sodium salt roasting are the main with K CO at 600 C and water leaching to remove 2 3 pyrometallurgicalbased pretreatment methods for Se. Subsequent steps, such as H SO leaching and 2 4 anode slime processing. HCl leaching, were employed to remove Cu and Te.

EXTRACTING SILVER FROM ANODE SLIME AFTER LEAD AND .

) published a review of anode slime processing, including anode slime leaching by sulfuric acid. Research on gold, silver and copper separation had been accomplished by Bard and Sobral () using hydrochloric acid solution adding sodium hypochlorite solutions as an oxidizing agent. The goldand silver can be separated from the after slime

Materials Proceedings | Free FullText | Leaching Kinetics

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

36 researched the role of oxygen and ammonium ions on the

Thiourea leaching 2.3.1. Leaching with the mixture of thiourea and oxidants Jana Ficeriová et al. 37)silver and gold from anode slime by employing two steps. The first step was to dissolve 99% Cu and most of Se and Te with sulfuric acid in 1 h under 6 atm N 2 pressure at 350 o C.

Development of a hydrometallurgical process for the

Mar 20, · 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

Advancements in the treatment and processing of electronic

Feb 07, · The amount of electronic waste (ewaste) globally has doubled in just five years, from approximately 20 million tons to 40 million tons of ewaste generated per year. In, the global amount of ewaste reached an alltime high of 44.7 million tons. Ewaste is an invaluable unconventional resource due to iGreen Chemistry Hot Articles

Separative treatment of anode slimeSouthwire Company

Referring more particularly to the drawing, it is seen that the overall process of the invention may be divided broadly into four concentrating units, as indicated by dashed circumscriptions A through D. Unit A receives the anode slime starting material and through amine leaching produces lead carbonate.

CiteSeerX — PROCESSING OF COPPER ANODESLIMES FOR

CiteSeerXDocument Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 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 – O2 and silver with thiourea – Fe3+.

A Novel Process For Recovery Of Te And Se From Copper

In pressure oxidation leaching of copper anode slimes, more than 65% of the tellurium is coextracted during decopperizing. About 10– 15% of the selenium is also dissolved simultaneously by severe leach conditions. Current operation for the treatment of the leachate is to constantly recirculate the leach solution through a bed of copper turnings.

Thermochemical Route for Extraction and Recycling of

May 17, · The most typical investigations concerned CAS treatment by H 2 SO 4O 2 to recover Cu followed by thiourea leaching for Ag extraction or leaching in a sulfuric and nitric acid medium which was used for silverA sample of copper anode slime provided from a refining factory available as a powdered solid with a mean particles size less than 30

Comprehensive recoveries of selenium, copper, gold, silver

Aug 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 4H 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 .

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)

Extraction of platinum and gold from copper anode slimes

The copper anode slime used in this work was obtained from a copper smelter located in Yunnan province of China. As presented in Table 1, the major elements contained in this slime were Cu, Sn, Sb, Ag, As, S, O, and Te, and the contents of Pt and Au were 93.76 g/t and .15 g/t respectively. Fig.1 shows that this copper anode slime was

LEACHING BEHAVIOR OF THE ANODE SLIME GENERATED BY .

Leaching of the anode slime with either HCl or HNO. 3. solutions is characterized by the rate the major components are dissolved. The efficiency of HCl leaching is illustrated by Figs. 46 for three HCl concentrations and three temperatures. Fig. 4 Leaching of Sn and Cu from the slime with 6 M HCl at 75 (a) 85 (b) and 100 (c) o. C . a) cb) ) a

10./j.ultsonch..11.013 | DeepDyve

Jun 11, · The components of copper anode slime and reduce the leaching time. The effects of parameters such as are more and more complicated. The environment protection rule ultrasound power, leaching time, sulfuric acid concentration and is becoming more strict. It is necessary to develop a new method liquid/solid ratio (L/S) were investigated.

Copper Refinexzcsry Operation | Anode | Cathode

Dissolved Se and Te from slime leaching process. Liberator Cells Electrowinning cell Anode: H2O 2H+ + 1/2O2 + 2e Cathode: Cu++ + 2e Cu. Using lead anode Cell voltage = 2.4 volt Total 32 cells (Primary, Secondary, Tertiary) Used for stabilizing Cu in electrolyte as anode dissolve is ~1.4% and reducing some impurities. LIBERATOR ELECTROLYTE FLOW

Copper Electrorefining Process Anode Slime

Copper Electrorefining Process Anode Slime. A new approach for the treatment of copper electrorefining anode slime based on hydrometallurgical route involving sulfuric acid leaching with additives such as manganese dioxide and sodium chloride has been developed at national metallurgical laboratory nml jamshedpur india mineralogical characterization of the anode slime and the residues after

Processing of copper anodicslimes for extraction of

Jan 01, · The variables influencing the potential of using acidified thiourea solution as leaching agent are: thiourea concentration, temperature, leaching time, and ferricion concentration as oxidant. The decopperized slime residue is ground to −0.075 mm and then leached by acidified thiourea solution. 4.2.1. Effect of thiourea concentration

Saimmdec by SAIMMIssuu

Dec 01, · Journal of the SAIMM December

Cover OctoberPrintristekdikti

anode slime is relatively new compared to the possible extension pyrometallurgical process that is many innovations in the extraction process. Many hydrometallurgical processes were reported for extracting the valuable metals; among them are cyanidation (Hoffman, ; McClincy, ) and thiourea leaching (Schulze, ).

Iron removal from kaolin using thiourea assisted by

May 19, · Thiourea leaching gold and silver from the printed circuit boards of waste mobile phones. Jingying L, Xiuli X, Wenquan L. Waste Manag, 32(6):, 03 MarCited by: 20 articles | PMID:

Tellurium, from Copper Anode Slime to High Purity Product

Oct 06, · Tellurium is a rare metalloid that is vastly produced from copper anode slime, which is a byproduct of the copper electrorefining process. Choosing the proper recovery method strongly depends on the slimes composition, mineralogy, and tellurium concentration. In addition, correctly selecting the right method of leaching, purification, and precipitation in economic and environmental processing

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., . Some studies on sulfuric acid leaching of anode slimes with additives, Industrial Engineering Research, 41, .

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