This trickles slowly down through the ore, over a period of months, dissolving copper to form a weak solution of copper sulphate. In chile, the worlds largest copper producer, solvent extraction. This paper briefly discusses the modeling of solventextraction circuits. Decreasing operating costs and soluble loss in copper. For the experimental conditions studied, cyanex 272 showed a good recovery of zn after the stripping stage using h2so4. In this paper, we report the solvent extraction separation of copper, nickel and zinc from synthetic solution using lix 984 n as the extractant dissolved in kerosene, with an aim to separate these metals efficiently by single stage extraction. The extractant used to capture certain chemical species, usually chosen to maximize the.
Kordosky synopsis the concept of selectively extracting copper from a lowgrade dump leach solution followed by stripping the copper into an acid solution from which electrowon copper cathodes could. 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, flotation, solidliquid separation and tailings management. Students use solvent extraction to isolate and concentrate a solute. It is found that the extraction of both the metals remained the same over the range of ph studied.
Included in this report is background information regarding the kinsevere project, the principles and processes involved in solvent extraction and electrowinning for copper extraction, and the electrical connection scheme being implemented. Concerns include organic and inorganic separations, mass transfer process, solvent extraction economics, and coalescence in liquidliquid systems. Students are tasked to prepare a salicylaldoxime ligand and samples of the corresponding copper and. Over the last several decades copper solvent extraction electrowinning has proven to be a cost effective and adaptable technique for producing high grade copper. Oil refineries have made applications of liquidliquid extraction. Hydroxyoximes and copper hydrometallurgy provides a current examination of what is known regarding hydroxyoxime extractants, the chemistry and physicochemistry of extraction, and the potential of applying hydroxyoximes for extraction of copper and other metals in industrial processes. Growing role of solvent extraction in copper ores processing article pdf available in fizykochemiczne problemy mineralurgii 4242.
Modem diluents receive extensive quality control to ensure high. Such carbonate concentrates can be treated by a solvent extraction and electrowinning sxew plant or smelted. The concentration of ore is required and it is done by the froth flotation method. Solvent extraction has been used to produce high grade copper in since the invention of appropriate organic reagents in 1968 by general mills chemicals. It is a liquidliquid extraction process used to purify and concentrate solutions obtained from the leaching of ores. Minerals solvent extraction capability statement dec19.
Ppt solvent extraction powerpoint presentation free to. On the basis of this, a flow sheet of the process has been. Ion transfer at the interface between water and a fluorous solvent 1,1,1,2,3,4,4,5,5,5 decafluoropentane kohei uematsu, hajime katano, yasuhiro kuroda and toshiyuki osakai. Find details about the methods and significance of this type of extraction. Copper sulfate solution is collected in the pregnant leach pond then pumped to the solvent extraction plant.
Copper minerals generally occur as oxides or sulfides. Concentration of the copper ii sulfate solution by solvent extraction. Evaluation of copper solventextraction circuit data and. Over 10 million scientific documents at your fingertips. Recovery of copper, nickel and zinc from sulfate solutions. Solvent extraction applied to the recovery of heavy metals. Solvent extraction anstos minerals business unit has a wealth of experience in the application of solvent extraction for the purification of metals such as uranium, rare earths, base metals and zirconium niobium hafnium. Carriers and tracers, which are unique to radiochemistry, are described in section 14. The role of feed acidity and the disposition of impurities such as iron and chloride are considered. Solvent extraction sx of copper ii from ammonia solutions proceeds similarly to that from acidic solutions, but complexation of metal m by ammonia ligands must be considered. Copper recovery using leachsolvent extractionelectrowinning technology.
A wellperforming solventextraction circuit is a key part of producing good quality copper cathode. The copper is extracted from the solvent with strong aqueous acid which then deposits pure copper onto cathodes. The oxidized ores, consisting of the silicates, carbonates and sulfates, are treated by several methods, all involving some form of leaching of the crushed ore with sulfuric acid to produce impure solutions of copper sulfate. Extraction and enrichment of copper by liquid emulsion.
Supergene sulfide ores rich in native copper minerals are refractory to treatment with sulfuric acid leaching on all practicable time scales, and the dense metal particles do not react with froth flotation media. Solvent extraction an overview sciencedirect topics. In conventional sx plants this will recover up to 98% of the copper still leaving 0. Pdf growing role of solvent extraction in copper ores. About 80% of the worlds copper fromore is produced by concentrationsmelting refining of sulfide ores. Faqs with regards to operating a cu er tankhouse above 400 a m2 pdf. How hydrometallurgy and the sxew process made copper the. Pdf this study includes solvent extraction and electrowinning of copper from leaching process. Flotation tailings from copper production are deposits of copper and. Dissolution of copper from ore in sulfuric acid solvent, collection of solvent for cementation or solvent extraction remove copper from pregnant ieachate and remove some impurities remove copper from pregnantieachate and produce an electrolyte with sufficient copper content foreiectrowinning recover copper from the loaded electrolyte. The final phase of the solvent extraction process employs a strong acid to strip the copper from the organic solution. Solvent extraction of cu, mo, v, and u from leach solutions of copper.
As with oxide ores, solvent extraction and electrowinning technologies are used to recover the copper from the pregnant leach solution. Reaction of the ore over quite a long time and on a huge scale with a dilute acid such as dilute sulphuric acid to produce a very dilute copper ii sulphate solution. Extraction of copper at elevated feed concentrations sgs. The breadth of the projects we deliver includes conceptual desktop studies, bench scale process development programs. The problems related to the separation of undesirable and toxic metals are also discussed. The influence of this parameter on the co extraction of copper and nickel was studied over the ph range of 7 to 9, by using equal volume of the aqueous and organic phase 10% vv lix 984n, equilibrated for 20 min at room temperature. A steady state model of an industrial copper solvent extraction and electrowinning plant was developed by aminian et al 7. The chemical process industries have made use of solvent extraction as a unit operation for over thirty years. Students construct graphs to represent data and analyse them for trends and patterns. Copper recovery by solvent extraction has progressed from a technology with limited application for copper recovery from dilute sulfuric acid leach solutio. Two immiscible unmixing liquids are stirred and allowed to separate, causing the copper to move from one liquid to the other. Preconcentration and separation of copper ii with solvent extraction using n,n. Pdf preconcentration and separation of copper ii with. Solvent extraction acts as a purification and concentration technique at the same time.
Hence in this study experiments on separation of copper and nickel by solvent extraction have been performed using a modified aldoxime lix 664n as the extractant. Students are tasked to prepare a salicylaldoxime ligand and samples of the corresponding copper and nickel complexes, before performing test extractions and uvvis spectroscopic analysis. Copper extraction refers to the methods used to obtain copper from its ores. The operations are typically heap and dump leaching, with permanent pads rather than onoff pads to minimize operational costs.
A solvent extraction application consisting of threesequential solvent extraction steps to selectively recover the copper and cobalt from carrollite leach solution was conceived and. Separation of copper and nickel by solvent extraction. The transfer of copper from a cui chloride solution to a cuii sulfate solution requires extraction with a hydroxyoxime extractant as is used normally in the processing of sulfatebased copper leach solution. The model for the solvent extraction considers mass transfer of copper and iron in the mixers. 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. Solvent extraction, also called liquid liquid extraction, can be used to separate a substance from a solution by extraction into another solvent. Copper solvent extraction technology consists of two circuits connected by a common organic phase. Students investigate how chemistry can be used to produce useful substances such as copper. Students are tasked to prepare a salicylaldoxime ligand and samples of the corresponding copper and nickel complexes, before.
Recovery of copper from alkaline glycine leach solution using solvent extraction b. Box 86, fin02201 espoo, finland abstract the dynamic behaviour of an industrial copper solvent extraction. Liquidliquid extraction, mostly used in analysis, is a technique in which a solution is brought into contact with a second solvent. The commonest ore used in the extraction of copper is chalcopyrite cufes 2 also known as copper pyrites and other such sulfides.
Solvent extraction in hydrometallurgy is clearly a complex multicomponent extraction problem. The other 20% is produced by heap leaching solvent extraction electrowinning of oxide, and chalcocite ores. Winner of the standing ovation award for best powerpoint templates from presentations magazine. In the sxew process, the pls is pumped from the collection ponds to the sxew plant. The solvent extraction phase of treatment occurs in two stages.
Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that. A high copper nickel ratio on the copper loaded organic is obtained by using an extra extraction stage in which copper crowds nickel from the loaded organic, i. During the initial phase an organic solvent is used to recover copper ions contained in the pregnant leach solution, exchanging them with hydrogen ions in the acid. The techniques for extraction of copper from oxidized ores are quite different from those employed for the sulfide ores. Here the copper is extracted away from the aqueous phase leaving behind most of the impurities that were in the leach solution. These require different treatments for extraction of the metal. The chapter begins with an overview of the history of cop. Decreasing operating costs and soluble loss in copper hydrometallurgy with use of innovative solvent extraction circuits g m miller1 and a nisbett2 abstract the largest single operating loss in many hydrometallurgical plants is the poor recovery of. Copper moves from the leach solution into the solvent.
In the case of copper sx, the exchange is typically achieved by an oximebased chelating mechanism. The very dilute solution is brought into contact with a relatively small amount of an organic solvent containing something which will bind with copper ii ions so that they are removed from the dilute solution. Separation of copper ii with solvent extraction using. Solvent extraction of copper and zinc from bioleaching. Copper corrosion the copper corrosion test method illustrates if the solvent contains corrosion causing sulphur. Solvent extraction of copper ii cuii from aqueous solutions by organic solvent composing of lauric acid extractant benzene diluent has been studied at t298. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Extraction of copper mining, concentration, smelting.
Pdf hydrometallurgical treatment of complex copper sulfidic ores, byproducts and concentrates requires aggressive, oxidative leaching. Copper oxide deposits, and certain sulfide deposits, are amenable to treatment by heap leaching and. Selective separation of copper and nickel by solvent. A multidisciplinary experiment for advanced undergraduate students has been developed in the context of extractive metallurgy. Technical literature is full of references covering the theory and application of this mass transfer principle to the chemical industries.
Extraction of copper at elevated feed concentrations. Solvent extraction of copper, nickel and zinc from the sulphateacetate medium was studied individually using 0. Solvent extraction and its applications on ore processing and recovery of metals. Reagent improvements have led the way, but they have been accompanied by innovations in leaching and improvements in electrowinning. The experiment serves as a model of an important modern industrial process that combines aspects of organicinorganic synthesis and analysis. The primary objective was to maximize copper extraction using one solvent extraction circuit. Chemistry of copper solvent extraction liquid liquid extraction involves the selective transfer of a substance between two immiscible liquid phases by controlling the relative solubility in each phase. Solvent extraction the sx circuit consists of 4 four mixersettler units.
Solvent extraction of copper from chloride solution i. Copper can be extracted from nonsulphide ores by a different process involving three separate stages. Pdf solvent extraction of copper, nickel and zinc by. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. Lems can acccomplish both extraction and stripping in one step.
This process is known as sxew solvent extraction electrowinning. The solvent extraction process for copper recovery involves simultaneous cuprous oxidation and cupric solvent extraction. The technology of copper solvent extraction produces the most economical copper from lowgrade copper ore. Box 6100, fin02015 hut, finland b outokumpu technology, p. It can be used either to recover a valuable substance from the original solution, or to purify the original solvent by. Historical background when the sulphuric acid copper lsx ew flow sheet figure 1 was put forth by the minerals. The challenges of running short sx piloting campaigns are discussed. Journal of hazardous materials b120 2005 1118 solvent extraction applied to the recovery of heavy metals from galvanic sludge j. She is a coauthor of extractive metallurgy of copper 5th ed. Castroa a mechanical engineering department, university of minho, 4800058 guimar. Solvent extraction of copper, nickel and zinc by cyanex 272. This solution, known as pregnant liquor, is recovered and then contacted with an organic solvent, referred to as the extractant, in the solvent extraction stage sx. For cement copper production freight and smelting charges alone usually exceed this figure. First, the ore is treated with dilute sulphuric acid.
Pdf solvent extraction of copperii from concentrated leach liquors. Anotherfactor is the widespread recognition ofthe advantages ofthe solvent extraction electrowinning process sxelv. Sx circuit configuration extraction stage the ammonium leach liquor, with the copper removed, was the feed to the solvent extraction circuit. Introduction the most important operation in hydrometallurgy is leaching of properly prepared. Kislik medical emergencies and resuscitation standards for clinical practice and training for dental practitioners and dental care professionals in general dental practice. The copper in the pls is then extracted producing cathode copper using solvent extraction sx and electrowinning ew processes sxew. Copper production from recycled endofuse objects is about 15% of copper fromore copper production. Extractants for copper extraction are like lix reagents, acorga, kelex, d2ehpa, etc. Compared to solvent extraction, liquid emul sion membranes lems have several advantages. Hydrometallurgy in extraction processes download ebook. Trends covered are fiberreinforced plastic construction mixer box and settler designs, reverse flow settlers, and advanced mixer design. Pdf solvent extraction and electrowining from copper leaching. The modes of action of the commercial solvent extractants used in. In the first step, called extraction step, metal is extracted from aqueous phase by organic phase.
Komulainen, t rantala, a doyle, f jamsajounela, sirkka. To ensure consistent operation, a good understanding of the circuits operation and an ability to rapidly troubleshoot key parameters is required. Solvent extraction is one of the most common and important methods for separation and purification of many elements. It is a method of separating compounds on the basis of. Solvent extraction is a frequently used technology in hydrometallurgy. The sx process at sbm utilizes two solvent extraction trains, each with three processing stages. This chapter briefly describes the technology for producing copper, from exploration, through mining and milling, to smelting and refining or solvent extraction and electrowinning.
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. Concentration of the copper ii sulphate solution by solvent extraction. She regularly presents accredited continuing professional development training courses, many of which focus on hydrometallurgy of copper. The sol vency power of a solvent is stronger with a higher value. The value describes how much of the solvent can be added to a mixture of kauri wax and butanol before the mixture turns murky or cloudy. Nrrdonlyres62a4bda02b5f4579976168114b57a2a0 thesolve. Copper recovery using leachsolvent extractionelectrowinning. 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. Copper solvent extraction was originally developed in the 1960s to recover copper from relatively dilute leach solutions, typically heap leach liquors with copper. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. Recent advances in liquidliquid extraction focuses on the applications of liquid extraction.
Solvent extraction of copper, nickel and zinc by cyanex 272 article pdf available in international journal of physical sciences 72012. Pdf solvent extraction and its applications on ore. Solvent extraction techniques are used in a wide variety of industries other than hydrometallurgy and a large range of extraction equipment has been developed over the years, many types having apparent advantages over mixersettlers from the point of view of both solvent inventory and plot area. Liquid liquid extraction download ebook pdf, epub, tuebl. Lems remove the equilibrium limitations of solvent extraction by combining extraction and stripping in a.
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