the mobile device gold leaching

the mobile device gold leaching

Leaching of Gold from the Waste Mobile Phone

2012-1-2  A leaching of 56.7% gold was obtained under the optimum condition of 0.1M ammonium thiosulfate, 40 mM copper sulfate, pH: 10-10.5, pulp density: 10 g/L at room temperature and stirring speed of 250 rpm in 8h duration. The maximum leaching of gold in the pH range 10-10.5 may be attributed to the higher stability of the ammonium thiosulfate.

Leaching of Gold from the Waste Mobile Phone

The present work deals with the recovery of gold using ammonium thiosuphate as a leaching agent from waste mobile PCBs containing 0.021 % Au, 0.1 % Ag, 56.68% copper, 1.61 % Ca, 1.42% Al, 1.40% Sn, 0.24% Fe, 0.22% Zn, 0.01 % Pd etc.. The cutting granules of 0.5 -3 mm PCBs were used for leaching in a 500 mL glass beaker in open atmosphere.

Thiosulfate leaching of gold from waste mobile

2010-6-15  The effect of thiosulfate concentration on the leaching of gold from waste mobile phones was examined by varying its concentration over a range of 0.06–0.2 M.The results presented in Fig. 2(a)–(d) indicate that the leaching of gold increased with an increase in thiosulfate concentration and then after reaching maximum leaching, decreased with a further increase in thiosulfate concentration.

Designs for Small Portable and Mobile Gold Leaching

2016-3-11  Designs for Small Portable and Mobile Gold Leaching Plant. Post navigation. Previous. Next . Secondary Crusher is recommended for efficient crushing in the 250 to 265 ton/day: Agitation capacity based on 36 to 48 hours of agitation time. Thickener area based on 6 to 7 square feet per ton of dry solids per 24 hours.

Evaluation of gold and silver leaching from printed ...

2014-2-1  The results obtained on leaching of gold using sodium thiosulfate and ammonium thiosulfate show that the best results were achieved when using a solution with 0.1 M of sodium thiosulfate, 0.2 M of ammonium hydroxide and copper concentration between 0.015 and 0.03 M, reaching about 15% of gold

GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS OF

Gold Recovery from Printed Circuit Boards of Mobile Phones Scraps Using a Leaching Solution Alternative to Cyanide 933 From a literature review (leaching of gold ores, mostly), it was found that ...

GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS

The leaching tests were carried out using the parameters described in the user manual of the product. The parameters used in gold leaching of mobile phone PCBs with commercial stripping were: temperature 25±2(ºC), 2 hours of extraction, pH 12.5 and solid/liquid ratio 1/25. All tests were performed in a closed reactor.

Thiourea leaching gold and silver from the printed

2012-6-1  Laboratory scale experiments were carried out to study the leaching of gold and silver from the PCBs collected from waste mobile phones. Various parameters, such as concentrations of thiourea and Fe 3+, particle size and leaching temperature, were studied. Solution chemistry had more influence on the leaching of gold and silver from the PCBs.

Optimizing the thiosulfate leaching of gold from

2014-10-1  Under these conditions the gold leaching process followed the pseudo-second order kinetic model. At the mid-range of 60–70 mM thiosulfate, 7–9 mM copper(II) and 0.247–0.263 M ammonia, the reaction orders were found to be 0.22, 0.16 and 0.72, respectively. The gold leaching process followed the pseudo-first order kinetic model.

(PDF) Effect of radiation from mobile devices on

Radiation from mobile devices has been known to affect the autonomous nervous system after prolonged use. It has been documented that electromagnetic radiation increases leaching of mercury from ...

Thiosulfate leaching of gold from waste mobile

The present communication deals with the leaching of gold from the printed circuit boards (PCBs) of waste mobile phones using an effective and less hazardous system, i.e., a copper-ammonia ...

GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS

The leaching tests were carried out using the parameters described in the user manual of the product. The parameters used in gold leaching of mobile phone PCBs with commercial stripping were: temperature 25±2(ºC), 2 hours of extraction, pH 12.5 and solid/liquid ratio 1/25. All tests were performed in a closed reactor.

Leaching of gold and silver from printed circuit board

The results for leaching gold with alternative reagents, sodium thiosulfate and ammonium hydroxide, show that the best extraction was achieved at 0.1M sodium thiosulfate and 0.2M ammonium hydroxide, when adding 0.1M of hydrogen peroxide as an oxidation agent, obtaining approximately 11% of gold.

Evaluation of gold and silver leaching from printed ...

2014-2-1  The results obtained on leaching of gold using sodium thiosulfate and ammonium thiosulfate show that the best results were achieved when using a solution with 0.1 M of sodium thiosulfate, 0.2 M of ammonium hydroxide and copper concentration between 0.015 and 0.03 M, reaching about 15% of gold

Thiosulfate Leaching of Gold and Silver from Waste

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Recycling copper and gold from e-waste by a two

In this work, we combine the delamination of WPCBs obtained from end-of-life mobile phones, the oxidative leaching of the metallic fractions, and the separation and recovery of copper and gold by solvent extraction to define a technically feasible process that can recycle these valuable metals from e-waste ().In contrast to previous reports, we have focused on the extraction of metals from ...

Reduction of Thiourea Consumption in Gold

1997-7-2  The thiourea leaching of gold and silver from the gold-bearing silicate ore of the Hishikari mine (Kagoshima, Japan) was studied. The apparent activation energy of the extraction of gold and silver was smaller than that of the reaction rate of thiourea consumption by ferric iron. We carried out the leaching after the leaching solution was preserved for several hours. The gold recovery at 288 K ...

Rapid, Selective Extraction of Trace Amounts of Gold

2018-11-5  With the ever-increasing production of electronics, there is an ensuing need for gold extraction from sources other than virgin mines. Currently, there are no technologies reported to date that can effectively and selectively concentrate ultratrace amounts of gold from liquid sources. Here, we provide a blueprint for the design of several highly porous composites made up of a metal–organic ...

Extracting Gold HowStuffWorks

Leaching dissolves the gold out of the ore using a chemical solvent. The most common solvent is cyanide, which must be combined with oxygen in a process known as carbon-in-pulp . As the cyanide and oxygen react chemically, gold in the pulp dissolves.

Air lift pump - CIL plant air lift device - oremachinery

Air Lift Pump By using an external gas source for carbon lift, which is simple structure. Mob: 0086-199 7091 0905Category: Gold leaching equipmentDescription Technical DataTechnical SpecificationModel Suction tube Specs(mm) Air Pipe Specs(mm) Applied modelKT60 Ф159*5 Ф20*3 SJ2.5*3.15, SJ3.0*3.15, SJ3.15*3.55, SJ3.55*4.0

Leaching of gold and silver from printed circuit board

The results for leaching gold with alternative reagents, sodium thiosulfate and ammonium hydroxide, show that the best extraction was achieved at 0.1M sodium thiosulfate and 0.2M ammonium hydroxide, when adding 0.1M of hydrogen peroxide as an oxidation agent, obtaining approximately 11% of gold.

Challenges and opportunities in the recovery of gold from ...

typically 0.0018 wt% (18 ppm) of gold and a typical silver bearing ore contains 0.085% (85 ppm) of silver.31 It is also apparent that the concentration of precious metals found in electronic waste is dependent on the age of the device; the thickness of gold contacts halved from ca. 1.0 mm in devices

Challenges and opportunities in the recovery of gold

The well-documented toxicity and environmental concerns around the use of cyanide in the gold mining industry 12 has led to the adoption of the International Cyanide Management Code, a voluntary program intended to reduce the potential exposure of workers and local communities to the harmful effects of cyanide. It is estimated that cyanide leaching is used in around 90% of gold production from ...

Simple method for extracting gold from electrical and ...

recovery of gold with activated carbon) in their proposed method (9). Kogan et al succeeded in extracting 98% gold from a leaching solution using a solvent extraction method (10). In the process presented by Biong et al, over 99.9% of gold was extracted from a leaching solution using solvent (Dibutyl carbinol) extraction method. Park

How to Extract Gold From Electronics : 11 Steps (with ...

How to Extract Gold From Electronics: In this Instructable, I will show you how to extract gold from computers using products most people have lying around in their homes. The way I extract the gold is relatively straight-forward and pretty easy, but the chemicals used are very dangerou

Gold Extraction from Tailings and mine waste

Gold Extraction from Tailings. Star Trace has been providing a standard technique for extracting the mineral contents from the mining tailings. Star Trace will start the process by sample testing through the mineral content of the tailings.

Extracting Gold HowStuffWorks

Leaching dissolves the gold out of the ore using a chemical solvent. The most common solvent is cyanide, which must be combined with oxygen in a process known as carbon-in-pulp . As the cyanide and oxygen react chemically, gold in the pulp dissolves.

Products / Mineral Processing Equipment_The Nile

2020-10-27  Double impellers leaching stirred tank Non-cyanide gold leaching agent Flotation separator Magnetic Separator Disc vacuum filter Plate and Frame Filter Press Jigging Machine Shaking table Centrifugal Gold Concentrator Adsorption and Elution Column Chute ore washer Water cyclone separator; Other Equipment Mobile Trommel Gold Wash Plant

Air lift pump - CIL plant air lift device - oremachinery

Air Lift Pump By using an external gas source for carbon lift, which is simple structure. Mob: 0086-199 7091 0905Category: Gold leaching equipmentDescription Technical DataTechnical SpecificationModel Suction tube Specs(mm) Air Pipe Specs(mm) Applied modelKT60 Ф159*5 Ф20*3 SJ2.5*3.15, SJ3.0*3.15, SJ3.15*3.55, SJ3.55*4.0

Small Scale Gold Trommel - PRODUCTS - 江西金石宝矿山 ...

Portable Gold Trommel >> Both stationary and mobile type available >> Both diesel engine and motor engine available >> Light >> Suitable for washing and screening various kinds