leaching gold with bromine

  • Bromine leaching as an alternative method for gold

    The comparison between bromine, cyanide and thiosulfate leaching for the same ore indicates that bromine is a good technical alternative for leaching this gold ore. The following advantages may be stressed: fast dissolution rate, non-toxic reagents, it does not require the use of pH regulator and can be performed with low quantities of leaching

  • (PDF) STUDY OF GOLD LEACHING WITH BROMINE AND BROMIDE

    Oct 01, 2014· The comparison between bromine, cyanide and thiosulfate leaching for the same ore indicates that bromine is a good technical alternative for leaching this gold ore.

  • Bromine leaching as an alternative method for gold

    The comparison between bromine, cyanide and thiosulfate leaching for the same ore indicates that bromine is a good technical alternative for leaching this gold ore.

  • STUDY OF GOLD LEACHING WITH BROMINE AND BROMIDE

    bromine/bromide leaching, gold dissolution rate, sulphide minerals, copper COM 2014 Conference of Metallurgists Proceedings ISBN: 978-1-926872-24-7 Published by the Canadian Institute of Mining

  • EVALUATION OF STABILISED BROMINE TECHNOLOGY FOR GOLD

    the stabilised bromine leach, in that the cyanide l each measurements include d only the extents of dissolution of gold and co pper. For the cyanide base d m odel, silver was assumed to m imic gold.

  • A Method for Leaching or Dissolving Gold from Ores or

    The hydrometallurgical leaching of native gold from gold-bearing ores or the dissolution of gold metal during the recycling of electronic and precious chlorine gas) while bromine water was also mentioned. It was the first hydro-metallurgical process to recover gold.9 Svistunov et al., studying the action of

  • Bromine leaching as an alternative method for gold

    The comparison between bromine, cyanide and thiosulfate leaching for the same ore indicates that bromine is a good technical alternative for leaching this gold ore.

  • STUDY OF GOLD LEACHING WITH BROMINE AND

    bromine/bromide leaching, gold dissolution rate, sulphide minerals, copper COM 2014 Conference of Metallurgists Proceedings ISBN: 978-1-926872-24-7 Published by the Canadian Institute of Mining

  • EVALUATION OF STABILISED BROMINE TECHNOLOGY FOR GOLD LEACHING

    the stabilised bromine leach, in that the cyanide l each measurements include d only the extents of dissolution of gold and co pper. For the cyanide base d m odel, silver was assumed to m imic gold.

  • Leach Gold Bromine

    Refractory Concentrate Gold Leaching Cyanide Vs Bromine. Gold extraction, recovery and economics for two refractory concentrates were investigated using cyanide and bromine reagents. gold extractions for cyanide leaching 2448 hours and bromine leaching six hours were the same and ranged from 94 to 96. gold recoveries from bromine pregnant solutions using carbon adsorption, ion exchange

  • What are the Cyanide-Free Gold Recovery Methods?

    The study of gold recovery from primary ore by bromine-sodium bromide solution immersion method shows that the leaching rate of gold reaches 82% after immersion for 15-20 days, and chlorine can be used to regenerate bromine. Using sodium chloride-bromine to leaching sulfur-containing gold ore calcine, the gold recovery rate can reach more than 79%.

  • (PDF) Hydrometallurgical Treatment of Waste Printed

    In the leaching system, the dissolution of gold and silver requires the presence of bromine, because bromine serves not only as the bromide source, but also o ff ers a high oxidation–reduction

  • A comparison of alkali and acid methods for the extraction

    Oct 01, 1996· Gold and copper extraction with bromine The main reason for employing bromine leaching is the high acidity of RM l-water slurry, pH 2.4. The leaching solution was prepared with a Br2 and NaBr mixture. 1044 s.

  • Refining placer cons- bromide electrolytic leaching Gold

    Nov 19, 2011· Attached is a photo of about 450g of bromine I made a few evenings back (for use in my catalytic converter project!). EDIT: PS, bromine is preferable to work with in the cold. It freezes at 19F, so keeping it about the f.p. of water means its vapour pressure is low, which means your eyes are smarting!

  • CYANIDE-FREE PROCESS FOR GOLD EXTRACTION

    Chlorine, along with a catalytic amount of bromine, is used as oxidizing agents because of the particularly fast reaction of bromine with gold. The capability of chlorine to oxidize bromides to bromine, explains the low concentration of bromide required in the brine. 2 HOCl + 2 HCl → 2 Cl2 + H2O 2 NaBr+ Cl2 → 2 NaCl+ Br2 2 Au + 3 Br2 → 2

  • Dissolution of gold in oxidized bromide solutions

    Barbosa-Filho O. and Monhemius AJ.(1989) Thermochemistry of thyocyanate systems for leaching gold and silver ores, in Precious Metals′89 (eds. M.C. Jha and others), TMS-AIME, 307 Google Scholar Bray W.C. and Livingstone R.S.(1923) The catalytic decomposition of hydrogen peroxide in a bromine-bromide solution and a study of the steady state

  • A Method for Leaching or Dissolving Gold from Ores or

    The hydrometallurgical leaching of native gold from gold-bearing ores or the dissolution of gold metal during the recycling of electronic and precious chlorine gas) while bromine water was also mentioned. It was the first hydro-metallurgical process to recover gold.9 Svistunov et al., studying the action of

  • Alternative Lixiviants to Cyanide for Leaching Gold Ores

    Jan 01, 2016· Bromine-leaching results in rapid gold dissolution at near neutral pH conditions. Due to the high potential required for dissolution (E o = 0.97 V vs. SHE), compared with the formation of gold cyanide at 0.57 V (vs. SHE), gold bromide is unstable and requires the addition of a strong oxidant such as bromine.

  • US2283198A Bromine process for gold ores Google Patents

    US2283198A US363896A US36389640A US2283198A US 2283198 A US2283198 A US 2283198A US 363896 A US363896 A US 363896A US 36389640 A US36389640 A US 36389640A US 2283198 A US2283198 A US 2283198A Authority US United States Prior art keywords bromine gold ores bromide chlorine Prior art date 1940-11-01 Legal status (The legal status is an assumption and is not a legal

  • CA1340169C Hydrometallurgical process for extracting

    An aqueous composition adapted for dilution to provide a leaching solution effective for leaching of a precious metal comprising gold or silver from a source thereof. The composition comprises bromide ion, perbromide ion, molecular bromine, at least about 2% by weight bromate ion, and a metal ion selected from among alkali metal and alkaline earth metal.