Sulfuric Acid Granulation of Copper—Nickel Ore Tailings: Leaching of Copper and Nickel in the Presence of Sulfide Oxidation Activators

Minerals

Alena Kompanchenko¹  Anton Svetlov²  Andrey Goryachev²  Dmitriy Makarov² 

[1] Geological Institute, Kola Science Centre of the Russian Academy of Sciences, 184209 Apatity, Russia;Institute of North Industrial Ecology Problems, Kola Science Centre of the Russian Academy of Sciences, Fersman St., 14a, 184209 Apatity, Russia;

关键词: concentration tailings;    sulfuric acid granulation;    ferric iron;    nitrite ion;    heap leaching;    temperature below 0 °C;   

DOI  :  10.3390/min12020129

来源: DOAJ

【 摘 要 】

A laboratory scale study was conducted, aimed at finding an effective method for processing fine concentration tailings of copper-nickel ores. A sulfuric acid tailing granulation process followed by subsequent heap leaching of granules is proposed. Various methods of preparation and storage of the granular material are discussed. A solution of sulfuric acid was used as a binder. It was found that the addition of an oxidizing agent (Fe³⁺ and NO₂⁻) when irrigating the granules had an effect on the recovery of metals. Changes in the recovery performance of non-ferrous metals into solution were studied under subsequent heap leaching of the material during a period of positive temperatures. The role of nitrogen compounds, in particular, nitrous acid, on the recovery of metals into solution after the preliminary storage of granules at below 0 °C temperatures is also discussed.

【 授权许可】

Unknown