A process for separating zinc and copper values from an aqueous solution of copper and zinc salts having a ph of between about 0. Two new process flowsheets have been developed which combine chloride leaching of copper from chalcopyrite with solvent extraction, to selectively transfer. This process uses aqueous waterbased solutions to extract and purify copper from copper oxide ores at ordinary temperatures, usually in three steps. Reagent improvements have led the way, but they have been accompanied by innovations in leaching and improvements in electrowinning. To ensure consistent operation, a good understanding of the circuits operation and an ability to rapidly troubleshoot key parameters is required. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. Processing of manganese nodule leach liquor for the separation of. She is a coauthor of extractive metallurgy of copper 5th ed. The purpose of the research was to gain a better understanding of the. Copper recovery using leachsolvent extraction electrowinning technology 65 figure 2 and a catalytic amount of lix 63, was introduced in 19657 and in march 1968 the first commercial copper lsxew operation, the bluebird plan of ranchers. Extraction is commonly achieved by shaking the water sample and solvent in a separating funnel. Pdf dynamic modeling of an industrial copper solvent. Solvent extraction as an enabling technology in the nickel.
An improved method and apparatus is provided for the production of copper using a solvent extraction electrowinning process. The separation of co, ni and cu by solvent extraction. The commonest ore used in the extraction of copper is chalcopyrite cufes 2 also known as copper pyrites and other such sulfides. Evaluation of copper solventextraction circuit data and. Solvent extraction is a relatively new technology compared to other unit operations such as distillation and absorption. Design of this 2ex1s configuration was based on the expected value of copper extraction efficiency of 90%. Generally, copper extraction follows the sequence see figure below. Pdf heap leaching of oxide copper ores and cathode copper. Pure copper metal is mostly produced from these ores by concentration, smelting, and refining. Oxide ores are generally processed using hydrometallurgy.
The other 20% is produced by heap leaching solvent extraction electrowinning of oxide, and chalcocite ores. After enrichment steps, the copper concentrates are usually treated by pyrometallurgical methods. Groves 2 abstract the bureau of mines conducted a laboratory investigation of copper electrowinning from electrolytes produced by solvent extraction. This paper briefly discusses the modeling of solvent extraction.
Copper solvent extraction has been adapted to deal with the leach liquors from a. A wellperforming solvent extraction circuit is a key part of producing good quality copper cathode. An engineering houses perspective of required inputs in designing a copper electrowinning tank house and ancillary equipment calls for both understanding of the key fundamental controlling mechanisms and the practical requirements to optimize cost, schedule and product quality. The concentration of ore is required and it is done by the froth flotation method. Solvent extraction of copper, nickel and zinc from the sulphateacetate medium was studied individually using 0. In this paper, the extraction mechanism of znii, coii and niii from chloride media has been studied systematically. Separation of copper ii with solvent extraction using. For oil as a solvent, mix around 20 g of propolis with 400 ml of refined food oil or 200 g. Oxime formulations can be tailored to meet individual customer requirements and are suitable for a wide range of leach solutions. Pdf growing role of solvent extraction in copper ores processing. Combine aqueous feed process pregnant leach solution pls with previously stripped organic plant stripped organic at the specified oa ratio. Extraction of copper mining, concentration, smelting. The first largescale industrial solvent extraction plant was built in 1942 by mallinckrodt chemical company for production of ton amounts of uranium by selective extraction of uranyl nitrate by ether from aqueous solutions.
Separation of copper ii with solvent extraction using lauric acid diluted in benzene h. Solvent extraction a separating technique distribution. Article views are the countercompliant sum of full text article downloads since november 2008 both pdf and html across all institutions and individuals. Practica in process engineering ii extraction introduction extraction is a process in which one or more components are separated selectively from a liquid or solid mixture, the feed phase 1, by means of a liquid immiscible solvent phase 2. Pdf solvent extraction of copper, nickel and zinc by. Also included is a detailed analysis of ac induction motors, and an introduction to the common loads and drive characteristics frequently. Solvent extraction of cu, mo, v, and u from leach solutions of copper. Growing role of solvent extraction in copper ores processing article pdf available in fizykochemiczne problemy mineralurgii 4242. A mechanism for solvent extraction of first row transition. Chapter 6 copper production technology the last boomin technological innovation for the copper industry occurred in the first two decades of this century, whenopen pit mining, flo tation concentration,and the reverberatory smelter were adapted to porphyry copper ores.
A variety of solvent extraction reagents have been investigated for the recovery of copper ions from pregnant leach solutions. Later, the purified solution undergoes copper electrolysis, which results in cathode copper that meets quality and quantity criteria enabling its sale. Us5849172a copper solvent extraction and electrowinning. Ppt solvent extraction powerpoint presentation free to. Solvent extraction mediated fractionation of copper in waters at natural ph conditions. Copper can be extracted from nonsulfide ores by a different process involving three separate stages. Studies were conducted on the extraction of copper, nickel and zinc from their sulphate solutions using bis 2,4,4 trimethylpentyl phosphinic acid cyanex 272, ha as an extractant. Liquidliquid extraction, mostly used in analysis, is a technique in which a solution is brought into contact with a second solvent.
Minimizing lead contamination in copper produced by. Reaction of the ore over quite a long time and on a huge scale with a dilute acid such as dilute sulfuric acid to produce a very dilute copper ii sulfate solution. Radiometric methods were applied for process optimization. Oximes and bdiketone extractants have been extensively studied and applied commercially in the extraction of copper from acidic and alkaline aqueous solutions 1,2,19,21,26,31. Extraction of copper at elevated feed concentrations. In an sxew reactor, the first process to take place is solvent extraction, which involves setting and simultaneous purification of the postleaching solution. Concentration of the copper ii sulfate solution by solvent extraction. However, occasionally large amounts of emulsion are formed, and it is difficult to separate the solvent. Copperco is nearing completion of a feasibility study for an acidleach solvent extraction electrowinning sxew copper operation based on oxide copper deposits in the lady annie mount kelly area, located 100 to 120km north of mount isa. Solvent extraction of copper, nickel and zinc by cyanex 272. The challenges to conventional solvent extraction posed by leach liquors from. Copper extraction refers to the methods used to obtain copper from its ores. For direct or post solvent extraction copper electrowinning design, key theoretical considerations include current.
The transfer of the components from the feed to the solvent is controlled by the solubility behavior. The dynamic behaviour of an industrial copper solvent extraction mixersettler cascade is modelled to develop an advanced process control system. Citations are the number of other articles citing this article, calculated by crossref and updated daily. After a week or so filter the contents and a clear extract shall flow out easily. Copperco recently announced achievement of a significant milestone, having delineated a resource of. Solvent extraction although solvent extraction as a method of separation has long been known to the chemists, only in recent years it has achieved recognition among analysts as a powerful separation technique. Minimizing lead contamination in copper produced by solvent extraction electrowinning by 1. About 80% of the worlds copper fromore is produced by concentrationsmelting refining of sulfide ores. As an operating procedure this process was initiated during the war years as part of the atomic energy effort. Process streams formed during the process containing entrained liquids are fed to a cyclone to remove either organic extractant or water aqueous solutions from the stream. Solvent extraction for copper was not yet proven commer cially so most copper. Solvent extraction and electrowinning sxew is a twostage hydrometallurgical process that first extracts and upgrades copper ions from lowgrade leach solutions into a solvent containing a chemical that selectively reacts with and binds the copper in the solvent. Solvent extraction of copper ii cuii from aqueous solutions by organic solvent composing of lauric acid. The influences of extractant content, aqueous ph value, phase ratio and equilibration time on metals extraction were studied.
While using water as the solvent, the extract can be got through soaking the propolis in water for several days or boiling the mixture. Since it is common for the copper solvent extraction plant to supply feed electrolyte to an electrowinning plant, it is useful to combine the operating costs for the two plants when comparing costs of copper recovery by solvent extraction techniques with those for cementation. Copper flotation tailings, extraction, hydrometallurgy, radiotracer. A raffinate stream fed to a cyclone removes entrained organic phase which organic phase may be. Beneficiation by froth flotation of ore to give copper concentrate. Us3989607a solvent extraction and electrowinning of zinc. Pdf growing role of solvent extraction in copper ores. The results show that lix984 has a higher selectivity for copper than for iron, zinc and other metals, and has the copper. Solvent extraction an overview sciencedirect topics. These metrics are regularly updated to reflect usage leading up to the last few days. Understanding aqueousinorganic entrainment in copper solvent extraction phase that exits the e1 extraction stage because this solution, whether presettled in a lo tank or passing via a wash stage, will cause carryover of undesired impurities from the pregnant leach solution pls into the ew circuit. Copper recovery by solvent extraction has progressed from a technology with limited application for copper recovery from dilute sulfuric acid leach solution to a technology with broad application for copper recovery from a variety of leach solutions. Recovery of copper from alkaline glycine leach solution. The operations are typically heap and dump leaching, with permanent pads rather than onoff pads to minimize operational costs.
The adaptation of the solvent extraction process to the metallurgical industry has been extremely slow up until recent years. With innovative products, global field support and industry leading technical expertise, basf mining solutions provides sustainable solutions which increase productivity, recovery and flexibility throughout the mining operations including leaching, solvent extraction. The conversion of copper consists of a series of physical and electrochemical processes. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. Separation of copper ii with solvent extraction using lauric acid diluted in benzene. The solvent extraction of copper and zinc from the bioleaching solutions of lowgrade sulfide ores with lix984 and d2ehpa was investigated. About 80 % of primary copper production comes from lowgrade or poor sulfide ores.
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