uses of sodium sulfide in recovery of silver from silver thiosulphate

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role of sodium metabisulfite in gold recovery

What Are Uses Of Sodium Thiosulphate Sodium Thiosulphate. Sep 21, 2012 Video embedded Sodium thiosulfate (Na2S2O3), also spelled sodium thiosulphate, is a colorless crystalline compound that is more familiar as the pentahydrate, Na2S2O3 ... Inquire Now; Gold cyanidation Wikipedia. Recovery of gold from cyanide solutions ...

Method of gold extraction from sulphide gold bearing ores

Method of gold extraction from sulphide gold-bearing ores. C22B3/04 - by leaching (C22B0003180000 takes precedence);; C22B11 - Obtaining noble metals. FIELD: metallurgy. SUBSTANCE: method includes leaching by solution of mixture of hydrosulphite and sodium thiosulfate and ammonium, sorption of complex thiosulfate-gold on heavy-basic anionite ...

Froth Flotation Method JXSC Machine

Dec 20, 2018 However, due to its strong inhibitory effect on gold and silver ores and its ability to dissolve precious metals such as gold and silver, it is better not to use. Sodium sulfide is not only an activator of Au-Ag oxides, but also can form a layer of metal sulfide film on the surface of Au-Ag minerals, which makes the refractory oxides float better.

Process for the recovery of gold and silver from used

250 gms of the used Dore furnace refractory brick powder containing 135 gms/ton of gold and 3250 gms/ton of silver, 82% of MgO, 10% of Cr 2 O 3, and 7.5% of SiO 2 was roasted at 750 C. in presence of 38g of sodium chloride as the additive for 2 hrs. in a muffle furnace and then leached with sodium thiosulphate solution having a concentration ...