how to recover gold from gold tailing dumps

• 

  Recovery of Iron Values From Tailing Dumps Adopting

  The characterisation studies have indicated that most of the gangue minerals are accumulated in finer fractions. The studies on hydrocyclone and magnetic separation had indicated that an iron concentrate of 61 - 65 per cent Fe could be obtained by recovering 59 - 78 per cent of the iron values present in the slimes.

  view more
• 

  New Optimization Understanding of the Removal of Harmful …

  202217 · The investigation showed that the filaments of fungi cultivated along gold mine tailing dumps increased the solubility of the harmful elements. Maximum removal of 53% and 62% was observed for As and Zn, respectively, in a leachate of oxalic acid; 100%, 83.2%, and 57% of Cr (VI), Hg (II), and Cd (II) were removed, respectively.

  view more
• 

  Socio-Environmental Risks Linked with Mine Tailings …

  2023516 · Gold mine tailings pose a risk to health and the environment as well. One of the historical places with the highest gold production in the world, South Africa, has reported a direct relationship between the presence of heavy metals in soil and water and cases of cancer in children and adults in places surrounding tailings storage facilities ...

  view more
• 

  Zimbabwean geologist makes groundbreaking discovery of …

  2024330 · His findings could help unlock gold to the value of R450 billion that is hiding in plain sight within the unsightly mine dumps around Johannesburg. Uncovering a hidden gold mine. Historical mine waste from the Witwatersrand called tailings, contains over six billion tonnes of material with significant gold content, Chingwaru explains.

  view more
• 

  The efficacy of a new iodination roasting technology to recover gold ...

  2020710 · A small amount of attention has been paid to the recovery of metals from gold tailing. Snyders et al. investigated several low temperatures pre-leaching process to enhance the gold recovery from a gold tailing and found that KOH and NaOH pre-leaching resulted in the highest gold recovery (63 and 62%) (Snyders et al., 2018).

  view more
• 

  Converting tailings dumps into mineral resources

  2016128 · Similarly, tailings dumps arising from the processing of chrome ore in the Lower Group reefs of the BC are also being retreated to recover PGEs. Several commercially profitable enterprises have also been set up with the sole intention of retreating tailings dumps arising from South Africa’s Witwatersrand gold processing operations.

  view more
• 

  ABOUT ERGO - drd.co.za

  2023619 · There are two stages in the recovery of gold from surface tailings. 1 SURFACE RECOVERY The retreatment business is high-volume and low-risk. Vast quantities of material are processed monthly through the plant in order to recover gold from old mine dumps at a recovery rate that varies depending on the material being treated. As …

  view more
• 

  Mine tailings: reprocess, recover & recycle - The Intelligent …

  2019913 · Say a copper mine produced 1Mt of metal in 1999 at 90% recovery. The remaining 10% of copper, around 111kt, went to tailings. If the average copper price in 1999 was US$1,500/tonne then that 10% represented US$166.5 million of metal. Fast forward 20 years and at today’s price, US$5,842/tonne, if that material could be reprocessed and an …

  view more
• 

  Tailings potential: recovering metals from mine waste streams

  2024521 · Barrick is also exploring the possibility of critical metals recovery at Nevada Gold Mines, a joint venture with Newmont. The project will specifically target nickel, cobalt, scandium, zinc, and potentially other metals, using an ion-exchange recovery system to extract from heap leach copper solutions.

  view more