This invention relates to a method where sulfidic iron-bearing copper concentrate is leached on the countercurrent principle, in a chloride environment. The leaching takes place with the aid of bivalent copper and an oxygen-bearing gas as a multi-stage continuous process, under normal pressure, at a temperature, which as highest corresponds to the boiling …

 · The complete reaction results in dissolution of copper and iron ions from the chalcopyrite matrix. In the present paper, chalcopyrite leaching with hydrogen peroxide in the presence of ethylene glycol is studied in order to investigate role of ethylene glycol in the leaching reaction and to assess the possibilities of H 2 O 2 as an oxidant in ...

Leaching did not decrease decay resistance for either Gt or Tv. Disodium octaborate tetrahydrate (DOT):amine:copper derivatives with 1.14-2.93% retention after …

 · Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in …

Aug 08, 2012· Leaching did not decrease decay resistance for either Gt or Tv. Disodium octaborate tetrahydrate (DOT):amine:copper derivatives with 1.14-2.93% retention after …

 · considering projects involving the leaching of copper sulphides. INTRODUCTION In the ten years from 2003 to 2013 global mine production of copper has increased by over 23% to meet demand while the weighted average head grade has dropped from 0.9 to 0.73% Cu (Murphy, 2014). If these divergent trends of increasing demand and declining …

 · The Copper Leaching and Copper Cementation Process. The method of dissolution by sulfuric acid and ferric sulfate with chemical precipitation by means of scrap or sponge iron appears to offer the best …

copper leaching ore Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number US16/230,150 Other versions US20190127822A1 (en

 · To solve the problem of low permeability and lower extraction rates of high-mud ores, a surfactant was added as a penetrant to the pregnant leaching solution during column leaching tests. On the basis of the theories of physical chemistry and seepage flow mechanics, the mechanism by which seepage is enhanced under the effects of the …

 · leaching of cu hydroxides, oxides and basic metal salts by ammonia do not require oxidative dissolution (1–3) ( wayne richardson, 1997 ), while copper in metallic form requires an oxidative step, via o 2 to cuo (4), or subsequently coordinated cupric ammine species (5) ( strmčnik et al., 2009 ). (1)cu (oh)2 + 2 (nh4)2co3 → cu (nh3)42+ + 2co32− + …

 · Similar results were obtained for the leaching copper and iron when the deionized water was replaced by seawater in the leaching tests (88% and 61% for copper and iron extraction, respectively, in 24 h with only a 6% loss in hydrogen peroxide concentration). ... Ruiz-Sánchez A, Lapidus GT (2017) Study of chalcopyrite leaching …

 · its first leaching additive that is compatible with the entire Leach à SX EW process. History Heap leaching copper from oxide and secondary sulfide ores has been practiced commercially since the late 1960's. This methodology is mostly used for low-grade ores and involves the following basic processing steps: Mining, Crushing, Leaching,

A maximum copper dissolution of about 87 % can be recovered at a leaching temperature of 45 oC, 462 m particle size, 0.2 N hydrochloric acid, 1.0 g/L solid to liquid ratio, and 1000 …

 · Copper leaching profile with respect to bed height in the P4 sample. Leaching of total Cu, soluble Cu, and insoluble (chalcopyrite) Cu are shown. Copper recovery at 1 m is the average of the two duplicate totes. All other recoveries are combined, as successive totes are added to simulate bed height. The totes had been irrigated between 120 and ...

The copper concentrate is leached in atmospheric conditions at a temperature, which at highest corresponds to the boiling point of the solution, and the iron in the concentrate is precipitated...

Leaching did not decrease decay resistance for either Gt or Tv. Disodium octaborate tetrahydrate (DOT):amine:copper derivatives with 1.14-2.93% retention after water leaching prevented decay by Gt and with 0.54-1.19% retention prevented decay by Tv. Leaching decreased decay resistance to Gt but not to Tv. Capacity. T/H. Reviews

An article publication from copper listed three technological areas of study pursued by global resource company BHP Billiton. The three methods include In Situ Leaching, …

 · Highlights. In-situ leaching of copper from an abandoned heap of secondary sulphides was piloted at the 59 kt scale, demonstrated at the 1.2 Mt. scale, and fully implemented at the 16 Mt. scale with >1000 injection wells. Implementation of in-situ leaching was economically successful, producing 7600 t of copper from material that had …

 · If copper recovery depends on (1/d p) and the copper leaching rate depends on (1/d p) 2, leaching of ROM ore in dumps should be impossible, or at least so slow and marginal as to not be profitable. And yet dump leaching of copper secondary sulphides is practiced widely, with good recoveries and at rates rapid enough to be measurable …

 · The results show that copper leaching rate by EDTA is 80.61% under the conditions including EDTA concentration of 70 mmol/L, temperature of 55 ℃, and leaching time of 3 h, while copper leaching rate by EDTA+CA is …

 · For a copper concentrate containing 30 percent copper as Table 1 — Summary of current processing operations to treat Morenci ore (2017 basis, approximate …