In order to leach chalcopyrite and chalcocite under atmospheric or high pressure leaching conditions in sulfate or chloride medium ferric and copper ions... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.Get Price
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Aug 01 2008 · Sullivan concluded that ferric chloride is a better chalcopyrite leaching agent than ferric sulphate and that the effect was more marked at high temperatures Dutrizac et al 1969 found that in a temperature range between 50 and 100 °C the chalcopyrite leaching rate was linear in chloride medium and parabolic in sulphate medium
Leaching mechanism of chalcopyrite by a direct reaction with ferric chloride If the redox pair is formed by Cu 2 Cu the main reaction is 159 CuFeS 2 3 Cu 2 → H 2 O NaCl 4 Cu Fe 2 2 S 0
for copper extraction from chalcopyrite which can be applied to low grade copper ores due to the lower operating costs2 Many works have been reported for hydrometallurgical leaching of chalcopyrite The most often used lixiviants are acidic chloride media acidic sulfate media and basic ammonia solutions together with various oxidizing agents3–7
Copper leaching from chalcopyrite concentrates For more than 30 years a significant number of processes have been developed to leach copper from chalcopyrite concentrates These processes recover copper via hydrometallurgical leaching of the copper component of chalcopyrite concentrates followed by solvent extraction and electrowinning
Many chalcopyrite leaching studies have been performed with leachants such as ferric sulfate 4–7 ferric chloride 78 sodium nitratesulfuric acid 9 hydrochloric acid 10 and sodium chloridesulfuric acid 11 among others 10 The slow copper from chalcopyrite dissolution has been attributed to
Ferric chloride leaching can be made selective and more than 99 pct lead extraction can be obtained in 15 min Additional leaching time increases solubilization of chalcopyrite and sphalerite Because leaching and filtration were performed batchwise in the experimental unit the contact time between solution and concentrate was at least 30 min thereby increasing the extraction of copper silver and
ferric nitrate and ferric chloride and obtained a copper extraction of 92 in chloridenitrateferric mixture which proved favorable for chalcopyrite leaching at 50 C T sogtkhankhai et al
Abstract Leaching of chalcopyrite in oxidizing conditions usually results in low copper extraction due to mineral passivation It has been proposed that sodium chloride has a positive effect on chalcopyrite dissolution increasing copper extraction
Previous US Bureau of Mines USBM research on the leaching of chalcopyrite with ferric sulfate Fe2SO43 demonstrates that surfactant additions enhance chalcopyrite CuFeS2 leaching and that surfactant selection has a significant impact on the initial leaching rate Additions of chloride ion Cl are also known to enhance chalcopyrite leaching although a review of the literature on chalcopyrite leaching