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leaching gold with thiourea

Thiourea Gold Leaching Metallurgist & Mineral Processing

Table of ContentsAdsorption Gold Thiourea & Cation Exchange ResinThiourea ConcentrationThiourea Consumption during Gold Leaching The use of thiourea, (CS(NH2)2 as a complexing/extracting agent for gold and other precious metals has shown promise for implementation in the mining/metals industry. Laboratory testing of this reagent has indicated that a thiourea process for gold

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A REVIEW OF GOLD LEACHING IN ACID THIOUREA SOLUTIONS

Oct 23, 2006· Since the initial report of thiourea as a complexing reagent for gold leaching, considerable research has been directed toward the use of thiourea as an alternative to cyanide for gold extraction from different auriferous mineral resources. At the same time, some fundamental investigations of the system have been reported.

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An innovative thiourea gold leaching process ScienceDirect

Mar 01, 1998· 3.1.3. Influence of thiourea concentration on gold dissolution. The influence of thiourea concentration on the leaching of gold was investigated by varying CS(NH 2) 2 in the range from 10 to 100 g/kg. Fe 2 (SO4) 3 concentration was fixed at 0.5 g/kg,

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Thiourea Leaching of Gold Gold Metallurgy and the

The chemistry of thiourea is simpler than thiosulfate complexation with gold, forming a cationic complex of gold. Various oxidants like oxygen, ozone, sodium peroxide, hydrogen peroxide, ferric ions, dichromate, and manganese dioxide are employed to enhance the leaching of gold in thiourea solution.

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Thiourea–thiocyanate leaching system for gold ScienceDirect

Feb 01, 2011· The gold leaching rate decreases with time and ferric concentration has only a minor effect on the rate of gold dissolution. (2) A u + F e 3 + + 2 S C N − → A u (S C N) 2 − + F e 2 + In thiourea–thiocyanate solutions, the gold leaching rate remains constant with time, which means the mixed ligand exhibits behavior similar to thiourea

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Thiourea leaching gold and silver from the printed circuit

Jun 01, 2012· Highlights Thiourea is a selective and less hazardous agent as an alternative to the conventional and toxic cyanide. The agent was applied to leach gold and silver from PCBs of waste mobile phones. The influence of the particle size, thiourea and Fe 3+ concentrations and temperature was investigated. In the best condition, about 90% of gold and only 50% of silver were leached with a

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thiouria gold leaching line production

Thiourea for Extraction of Gold Silver from Silver Ores. When leaching at higher thiourea concentration, namely 100 kg/t, the rate of gold extraction is high: recovery of about 60% Au after 4 h is achieved. When leaching proceeds further the dissolution of gold increases to about 87% Au. Thiourea and sulphuric acid consumption were both 5 g/kg.

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thiourea gold leaching process-classifier gold flotation

thiourea gold leaching process; thiourea gold leaching process. Efficient Thickener. Efficient Thickener. Hydraulic Motor Driving Center Thickener. Hydraulic Motor Driving Center Thickener. Grid Type Ball Mill. Grid Type Ball Mill. Submerged Slurry Pump. Submerged Slurry Pump. Agitation Tank For Chemical Reagent.

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Leaching Gold-Silver Ores With Sodium Cyanide and Thiourea

sively for leaching gold and silver since its introduction 100 yr ago. Recently, there has been mch interest in the min- ing and metallurgical processing indus- tries in thiourea as an extractant for gold and silver (1-3, -- -- 6-14).3 Thiourea extracts gold in an acidic

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