gold leaching iodine pcb

Comparison of Leaching Processes of Gold and Copper from

Comparison of Leaching Processes of Gold and Copper from

Comparison of Leaching Processes of Gold and Copper from Printed Circuit Boards of Waste Mobile Phone Comparison of Leaching Processes of Gold and Copper from Printed Circuit Boards of Waste Mobile Phone. Iodine Printed Circuit Board (PCB) Thiourea Waste Mobile Phone. Export RIS BibTeX. Price 39.00.

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Leaching of Gold from the Waste Mobile Phone Printed

Leaching of Gold from the Waste Mobile Phone Printed

gold and other precious metals from the complex ores. 3. But due to toxicity of the cyanide its use in this process has been prohibited in many countries. Thiourea is a non-cyanide lixiviant for gold leaching which efficiently recovers gold. 3. but this is not an economical route for the gold leaching due to its high consumption and cost.

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WO2013152424A1Chloride process for the leaching of gold

WO2013152424A1Chloride process for the leaching of gold

A process for the extraction of gold from a gold-bearing ore or concentrate comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90°C and an Eh of at least 900 mV. After a liquid/solids separation step the solution obtained is subjected to an organic solvent

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Iodine 7 Leach for GoldPage 2Gold Refining Forum

Iodine 7 Leach for GoldPage 2Gold Refining Forum

Jul 05 2013 · Apparently there are several forms of this Iodine leach I concentrated my study on the basic triodide gold leach staying away from the ammonium Iodide as I understand it could be an explosive. Iodine Iodide Note I have not used it and have only done some study on it and this is the way I understand the process.

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Leaching of Gold from the Waste Mobile Phone Printed

Leaching of Gold from the Waste Mobile Phone Printed

gold and other precious metals from the complex ores. 3. But due to toxicity of the cyanide its use in this process has been prohibited in many countries. Thiourea is a non-cyanide lixiviant for gold leaching which efficiently recovers gold. 3. but this is not an economical route for the gold leaching due to its high consumption and cost.

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Interference of coexisting copper and aluminum on the

Interference of coexisting copper and aluminum on the

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

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Iodine Iodide GOLD Leach Test part 2YouTube

Iodine Iodide GOLD Leach Test part 2YouTube

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Mar 11 2016 · Iodine / Potassium Iodide gold leach. Gold extraction with BORAX for small-scale minersRather Rich Healthy than Poor PoisonedDuration 9 49. geusTUBE 890 500 views

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Iodine 7 Leach for GoldGold Refining Forum

Iodine 7 Leach for GoldGold Refining Forum

Sep 20 2007 · Gold-Digger Iodine leach goes to work immediately on Gold then Platinums then Silver in that order. It tends to ignore the other "Trash" metals. Naturally it is about PH 4-5 and is kept there especially in the presence of Alkali metals by adding small amounts of HCL acid. Typically 24-48 hours to collect fine gold.

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Potassium Iodide-Iodine gold etchantGold Refining Forum

Potassium Iodide-Iodine gold etchantGold Refining Forum

Mar 08 2009 · I am keen to used Iodine Potassium Iodide (KI3) etchant to recover gold plated computer/PCB part. I was told that it is very effective but I have not seen any discussion forum on this topic. Can anyone shed some light on this I am keen to know the advantages versus other technique for example toxicity gold specificity etc.

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GOLD extraction from transistors with iodine PART 2 of 2

GOLD extraction from transistors with iodine PART 2 of 2

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Dec 07 2017 · How to recycle gold and silver from cpu computer scrap Old CPU Scrap Gold ValueDuration 31 23. Archimedes Channel 324 384 views

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Recovery of Valuable Metals from Waste SpringerLink

Recovery of Valuable Metals from Waste SpringerLink

Abstract. This study presents a viable approach for recovery of precious metals such as gold (Au) silver (Ag) palladium (Pd) and base metals including copper (Cu) nickel (Ni) cobalt (Co) lead (Pb) and zinc (Zn) from waste printed circuit boards (WPCBs) via iodine-iodide leaching and precipitation.

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Leaching of Gold from the Waste Mobile Phone Printed

Leaching of Gold from the Waste Mobile Phone Printed

Complete PCB leaching (whole unit) of the mobile phone was also done to observe its effect on the leaching of gold. Results are compared with the shredded PCBs granules as shown in Fig. 7. About 78.8 of gold was leached with a complete PCB while in case of shredded sample it was 30.35 with the same pulp density (40 g/L) and other leaching

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How to Leach Gold Ore With Chlorination Sciencing

How to Leach Gold Ore With Chlorination Sciencing

Apr 25 2017 · Gold can be leached from stone through alkaline or acidic-based products including halogens such as chlorine iodine and bromine. Halogens are reactive non-metal elements with seven electrons in their outer shell which allow them to easily combine with other elements. The use of chlorine is both the cheapest and

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A Potential Alternative for Precious Metal Recovery from E

A Potential Alternative for Precious Metal Recovery from E

Printed circuit board (PCB) is the essential part of electronic devices and has an important source of base and precious metals with high economic potential. In this study selective leaching of gold from PCB was performed in an iodine-hydrogen peroxide (I 2-H 2 O 2) solution system.

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GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS OF

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 there are two research lines. Some authors worked with lower concentrations of thiosulfate and ammonium for a leaching time

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Solution chemistry of iodide leaching of goldScienceDirect

Solution chemistry of iodide leaching of goldScienceDirect

SOLUTION CHEMISTRY OF IODIDE LEACHING OF GOLD 45 CHEMIX computer program The CHEMIX program is part of a THERMODATA package developed by the CSIRO Division of Minerals Products (Melbourne Australia).

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Study on gold concentrate leaching by iodine-iodide

Study on gold concentrate leaching by iodine-iodide

Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study the method using iodine-iodide for gold leaching is proved feasible through thermodynamic

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WO2013152424A1Chloride process for the leaching of gold

WO2013152424A1Chloride process for the leaching of gold

A process for the extraction of gold from a gold-bearing ore or concentrate comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90°C and an Eh of at least 900 mV. After a liquid/solids separation step the solution obtained is subjected to an organic solvent

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Recovery of gold in iodine-iodide systema review

Recovery of gold in iodine-iodide systema review

Gold leaching in iodine-iodide solution has been intensely researched in 1980s while due to the high cost it has not been applied in industry. Currently as the drawbacks of other

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New iodine gold leach tech. Best metod.YouTube

New iodine gold leach tech. Best metod.YouTube

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Nov 21 2016 · Save money go to school 100 Валерий с радиолом охота рыбалка поиск монет. Интересный канал

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Iodide Pressure Oxidation Gold LeachingAutoclave

Iodide Pressure Oxidation Gold LeachingAutoclave

The use of iodide to recover gold from gold bearing materials has been reported in literature. In these previous studies elemental iodine was essential not only as an oxidant but also as a lixiviant. The fundamentals of such an iodine leaching at ambient temperature was studied.

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Iodine Iodide GOLD Leach Test part 2YouTube

Iodine Iodide GOLD Leach Test part 2YouTube

Click to view on Bing9 39

Mar 11 2016 · Iodine / Potassium Iodide gold leach. Gold extraction with BORAX for small-scale minersRather Rich Healthy than Poor PoisonedDuration 9 49. geusTUBE 890 500 views

Author OwlTech Get Price
Iodine Iodide GOLD Leach Test part 1YouTube

Iodine Iodide GOLD Leach Test part 1YouTube

Click to view on Bing7 58

Mar 11 2016 · Iodine / Potassium Iodide gold leach

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Iodine/Iodide Leaching of Gold from Black SandGold

Iodine/Iodide Leaching of Gold from Black SandGold

Dec 02 2012 · From what I have read Iodine/Iodide leaching seems to be a straight forward and effective method of recovering gold. What I am having truble finding out is whether or not it is a selective leach. In other words will it prefer the iron in the black sand to the free gold present with the black sand

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Iodine leach for the dissolution of goldIn-Situ Inc.

Iodine leach for the dissolution of goldIn-Situ Inc.

Dec 10 1985 · In the preferred embodiment of the process elemental iodine is added to a solution to form a gold lixiviant or leach. The solubility of the iodine will be limited initially to about 0.3 g/l (elemental I 2). However generally a higher total iodine concentration is

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Recovery of Valuable Metals from Waste SpringerLink

Recovery of Valuable Metals from Waste SpringerLink

Abstract. This study presents a viable approach for recovery of precious metals such as gold (Au) silver (Ag) palladium (Pd) and base metals including copper (Cu) nickel (Ni) cobalt (Co) lead (Pb) and zinc (Zn) from waste printed circuit boards (WPCBs) via iodine-iodide leaching and precipitation.

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Eco-friendly gold leachingEco-Goldex Reagent

Eco-friendly gold leachingEco-Goldex Reagent

Eco-Goldex O-series The O Series (it refers to Ores) is specially formulated and manufactured with the purpose of replacing the toxic sodium cyanide in gold/silver/PGM rock ore leaching. The O series can compete sodium cyanide easily in most rock ore processing including gold leaching rate (similar or even better) agent consumption (similar or slightly higher) and leaching time (similar or

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Leaching of gold and silver from printed circuit board of

Leaching of gold and silver from printed circuit board of

Leaching of gold and silver from printed circuit board of mobile phones. in general a printed circuit board from mobile phones has a composition of polymers (30 to 35 ) oxides (30 ) Leaching of PCB s with sodium thiosulfate and ammonium thiosulfate.

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Evaluation of gold and silver leaching from printed

Evaluation of gold and silver leaching from printed

Highlights • Printed circuit boards (PCB) of mobile phones have large amounts of metals with high economic value such as gold and silver. • Dissolution of gold was done with a cyanide-based reagent and silver with nitric acid. • Leaching of PCB with Na sub 2 S sub 2 O sub 3 and (NH sub 4

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Iodine/Iodide Leaching of Gold from Black SandGold

Iodine/Iodide Leaching of Gold from Black SandGold

Dec 02 2012 · From what I have read Iodine/Iodide leaching seems to be a straight forward and effective method of recovering gold. What I am having truble finding out is whether or not it is a selective leach. In other words will it prefer the iron in the black sand to the free gold present with the black sand

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US4557759AIodine leach for the dissolution of gold

US4557759AIodine leach for the dissolution of gold

A process for the hydrometallurgical recovery of gold from materials containing gold comprising leaching the materials with a lixiviant containing iodine. To a solution concentrated with natural salts is added elemental iodine until saturated whereupon mineral sulfides in the ore zone charged with this solution react with the iodine to form iodide.

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Recovery of gold in iodine-iodide systema review

Recovery of gold in iodine-iodide systema review

Gold leaching in iodine-iodide solution has been intensely researched in 1980s while due to the high cost it has not been applied in industry. Currently as the drawbacks of other

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Thermodynamic and kinetic of iodine–iodide leaching in

Thermodynamic and kinetic of iodine–iodide leaching in

Electrodepositing gold of iodine leaching solution from waste printed circuit board J . The Chinese Journal of Nonferrous Metals 2009 19(6) 1130∠1135. (in Chinese) 37 YIN J F ZHAN S H XU H. Comparison of leaching processes of gold and copper from printed circuit boards of

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The leaching kinetics of an oxide gold ore with iodide

The leaching kinetics of an oxide gold ore with iodide

Highlights Two gold ores were subjected to iodide/iodine leaching. The carbonaceous ore showed only 20 gold extraction. Gold extraction from the oxide ore reached 89 in 24 h. A power law rate equation was applied to model the gold extraction kinetics. Gold leaching rate was first order with respect to tri-iodide concentration.

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COMPARISON OF CYANIDE AND THIOSULPHATE

COMPARISON OF CYANIDE AND THIOSULPHATE

cons which have been discussed in this work. The topics of this work are gold ores and their suitability for leaching processes pretreatment of concentrate leaching chemistry and reagent consumption leaching kinetics gold recovery from leaching liquors and environmental and safety aspects.

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