youcai liu alkaline thiourea leaching gold

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Electrochemical behaviors of thiourea in alkaline medium

Youcai Liu Jiangang Fu Additionally the leaching rates of the coexisting metals are less than 0.1 when gold ore is leaching in alkaline thiourea system which indi es that gold leaching

Optimisation of efficient auxiliary agents of gold leaching

Thiourea as a kind of green and ecofriendly gold lixiviant was employed to substitute cyanide in the present study of gold leaching. The investigation was carried out on a finely disseminated gol

The leaching of gold silver and their alloys in alkaline

The gold leaching rate in solutions containing 0.5 M glycine and 1 peroxide at pH 11 after 48 h of leaching was found to be 0.322 mol/m 2 s which is comparable to gold leaching rate after six days in thiosulphateEDTA or thiosulphateoxalate systems in the presence of thiourea 0.220.25 mol/m 2 s .

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Electrochemical behaviors of gold and its associated elements

The results indi e that alkaline thiourea solution can be used to leach gold ore for oxidized gold concentrate removed arsenic by microbe pretreatment 4 the leaching rate of gold is up to 82

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Thiourea leaching gold and silver from the printed circuit

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 contact

PDF Effect of grinding on cyanide leaching of Gold

No more than 72.6 leaching rate could be reached due to deactivation of elemental sulfur created by thiourea and other negative factors while lower leaching rate 69.4 of gold leaching rate

Spectroelectrochemical investigations of gold leaching in

Youcai Liu Jiangang Fu Thiourea as a kind of green and ecofriendly gold lixiviant was employed to substitute cyanide in the present study of gold leaching. Time dependence of the mixed

Electrochemical adsorption and passivation on gold surface in

First reported in 1941 gold leaching by thiourea has been attracting interest 1234 due to its merits such as being nonpoisonous and highly efficient.Extensive studies have been carried out on the mechanism process conditions impact factors and dynamics of the acid thiourea system 567 however its inherent disadvantages such as the significant erosion of equipment and non

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