2 October 25th 2004 Presentation Outline Safety share Introduction yGlobal copper reserves resources yPhelps Dodge production amp reserves profile Commercial drivers for copper concentrate leaching The copper concentrate market and TC RCs Phelps Dodge copper pressure leaching developments yHigh temperature yMedium temperature Critical success factors for commercialization
The pilot plant will contain ten Dextec cells Insufficient details have been published to determine if the pilot plant will produce copper or simply remove contaminants from a copper concentrate Both the copper and lead processes incorporate leaching of sulphide concentrates
Hydrometallurgical Options to Add Value to Copper Projects and Operations Peter Rohner Core Resources Brisbane Copper Leach Flowsheets InSitu Leaching Metal Recovery SX EW SX Crystallisation Precipitation from copper concentrates
Leaching of High Grade Ores and Concentrates Design Factors –Copper Extraction –S L Separation and Washing –Acid Balance –Copper SXEW –Precious Metal Recovery Other Factors GALVANOX – New Technology for Copper Leaching Concluding Remarks 2
The entry of copper giants Phelps Dodge BHP Billiton and Codelco indie that at long last real Copper Leaching from Chalcopyrite Concentrates Shijie Wang progress may be made Leaching processes in hydrometallurgy are concerned mainly with treating minerals in order to form a solution containing the metals to be recovered
Copper Concentrate Leaching – More Recent Developments Ammonia Escondida Sulfate yPhelps Dodge yPlacer Dome yCESL Teck Cominco chlorideassisted yUBC Anglo American yActivox yDynatec Biological yBHPBilliton BioCop yBactechMintek yOthers Chloride Bromide Process – Intec Chloride – Outokumpu HydroCopper Nitrate Other
Copper processing is a complied process that begins with mining of the ore less than 1 copper and ends with sheets of 99 99 pure copper called hodes which will ultimately be made into products for everyday use The most common types of ore copper oxide and copper sulfide undergo two different processes hydrometallurgy and pyrometallurgy respectively due to the different
It is a patented alkaline leach process for the removal of arsenic antimony and other penalty elements from copper lead and nickel sulphide concentrates and antimony from gold concentrates The flowsheet consists of an atmospheric tank caustic leach followed by filtration and washing of the cleaned concentrate
Copper production About 80 of primary copper production comes from lowgrade or poor sulfide ores After enrichment steps the copper concentrates are usually treated by pyrometallurgical methods Generally copper extraction follows the sequence see Figure below 1 Beneficiation by froth flotation of ore to give copper concentrate
The supplied concentrate had a 10fold higher copper concentration than that used in the Noranda research and was similar to that used in the Calera operation Leaching of this concentrate at 155 176 C resulted in the formation of the troublesome sulfur balls
A process for extracting copper from a coppercontaining concentrate by comminuting the concentrate in the presence of a liquid dispersing agent which inhibits agglomeration and forms a pulp and leaching the pulp in the presence of a silver alyst
Solvent extraction in hydrometallurgical processing of Polish copper concentrates 209 The Polish copper ores exhibit very favourable mineralogical composition in terms of leachability Chalcocite Cu2S and bornite Cu5FeS4 easily leachable minerals predominate in the Polish ores while content of chalcopyrite CuFeS2 and covellite
leaching and requires intensive processes to burn off or oxidise the sulphide minerals to free the contained Copper Gold and Silver The concentrate is placed into 20 tonne 20 000kg containers which contain on average 3 000kg of Copper 3kg of Gold and 3kg of Silver These
Mitani Y amp Tokoro C 2015 The effect on copper leaching from chalcopyrite concentrates by ball milling In EARTH 2015 Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology pp 339345 International Symposium on
Outotec Copper Chloride Leaching Process utilizes mixed chloride – sulphate media in atmospheric leaching conditions to extract copper silver and gold from copper concentrate The leaching solution is purified with solvent extraction and copper is recovered
After this stage the enriched ore now contains about 25 copper by mass and is called copper concentrate It is valuable enough to ship to other plants and other countries for processing For example China Germany and Japan are major copper producers that use concentrate from around the world
copper concentrates for treatment at the Nkana Smelter and Refinery As an alternative to smelting Konkola Copper Mines KCM has examined a processing route involving pressure leaching of the Konkola concentrates at Nchanga with the leach liquor being treated by solvent extraction and electrowinning to produce high purity copper hode
The leaching experiments were performed using sulphuric acid solutions whereby the kinetics of copper leaching was investigated with respect to acid concentration and solid to liquid ratio The copper concentration in the leach solution ranged from 0 80 to 1 75 g dm3 The total Cu recovery rate ranged from 30 to 56 whereas the
of copper and iron from flotation concentrates including both primary and secondary copper sulfides has not been well studied as yet Hence this research was done to investigate the effect of these ions on chemical and bacterial leaching of Sarcheshmeh copper concentrate in the presence and absence of mixed cultures of moderately
The selective leaching of copper from a gold–copper concentrate in glycine solutions E A Oraby J J Eksteen⁎ Western Australian School of Mines Curtin
Leaching of Copper Concentrate PLCC The objective of this process is to eliminate arsenic and other impurities from the socalled complex copper concentrates produced by Codelco s North Division and particularly the underground Chuquicamata project and the Ministro Hales Division
We mainly produce crushing, grinding and related mining equipment.
