Separation of copper and nickel by solvent extraction using. Purification of copper electrolyte by solvent extraction. Ghanadzadeh gilani, department of chemical engineering, university of guilan, 435 rasht, iran, tel. Separation of copper ii with solvent extraction using. Solvent extraction, also called liquidliquid extraction lle and partitioning, is a method to separate compounds based on their relative solubilities in two different immiscible liquids. The present invention is directed to a process for recovering copper from a coppercontaining material by pressure oxidation followed by solvent extraction and electrowinning. Concentration of the copper ii sulfate solution by solvent extraction. At the core of basfs solvent extraction offering is an extensive range of lix oxime extractants that are widely used in the purification of copper leach solutions. Extraction of copper mining, concentration, smelting.
In most cases, the substance to be extracted, which may be a solid, a liquid or a gas, is dissolved in a liquid, along with other substances, and a. Solvent extraction of copper using tbp, d2ehpa and mibk mehdi irannajad, zahra afzali, hossein kamran haghighi russian journal of nonferrous metals 2018 59 6, 605611. This volume recognizes the growing role of solvent extraction and electrowinning technology in the world copper business. The commonest ore used in the extraction of copper is chalcopyrite cufes 2 also known as copper pyrites and other such sulfides. 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. Solvent extraction experiments were carried out in two stages. Solvent extraction is one of the most common and important methods for separation and purification of many elements. Here the copper is extracted away from the aqueous phase leaving behind most of the impurities that were in the leach solution. Liquidliquid extraction, mostly used in analysis, is a technique in which a solution is brought into contact with a second solvent.
The coppercontaining solution formed by pressure oxidation is diluted before solvent extraction and the raffinate solution from solvent extraction is neutralized to reduce the acid levels in the raffinate solution. The primary objective was to maximize copper extraction using one solvent extraction circuit. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. It is a method of separating compounds on the basis of. For the experimental conditions studied, cyanex 272 showed a good recovery of zn after the stripping stage using h2so4. Other factors important during solvent selection are viscosity, boiling point, flammability, etc. Solvent extraction is regarded as one of the most applicable methods of extracting copper from pregnant liquid solution. Abbasnejad department of chemical engineering, university of guilan, rasht, iran corresponding author. The techniques for extraction of copper from oxidized ores are quite different from those employed for the sulfide ores.
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. The role of feed acidity and the disposition of impurities such as iron and chloride are considered. Solvent extraction applied to the recovery of heavy metals. 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. Solvent extraction applied to mixed copper and zinc. Condition under which the reaction or the extraction process takes place also affects the separation. Solvent extraction is used to concentrate materials in an organic solution, while electrowinning is used to recover these pay elements. 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. Castroa a mechanical engineering department, university of minho, 4800058 guimar. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.
The solvent should not be toxic or corrosive as it can harm the extraction instruments. Copper extraction refers to the methods used to obtain copper from its ores. Design of this 2ex1s configuration was based on the expected value of copper extraction efficiency of 90%. 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.
Solvent extraction an overview sciencedirect topics. Solvent extraction applied to mixed copper and zinc bearing. In copper solvent extraction, aqueousinorganic entrainment results in the carryover of unwanted species into the electrowinning process with negative cost implications. Separation of copper ii with solvent extraction using lauric acid diluted in benzene h. Reagent improvements have led the way, but they have been accompanied by innovations in leaching and improvements in electrowinning. Copper recovery using leachsolvent extractionelectrowinning. Solvent extraction studies of copper and zinc have been carried out using versatic 10 acid and cyanex 272 separately from a model brass pickle liquor.
In recent years, the principle and theory behind solvent extraction has gained wide acceptance as one of the new tools of modern hydrometallurgy. What is solvent extraction and why is it important. Control of an industrial copper solvent extraction process core. 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. With the growing demand for metals of ever higher purity, the increasing use of unusual metals, and the necessity for treating ores of lower grade and greater complexity, solvent extraction has joined the ranks of other accepted recovery methods and. Pdf diluent effect on the solvent extraction rate of copper. Lix solvent extractants are recognized throughout the copper industry as the go to reagent for copper recovery. Basfs broad range includes aldoxime and ketoxime extractants and incorporates blends formulated to specific customer needs operational challenges. 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. Copper can be extracted from nonsulfide ores by a different process involving three separate stages. Pdf growing role of solvent extraction in copper ores. The challenges of running short sx piloting campaigns are discussed. 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 copperii sulphate solution.
Various parameters for the extraction and separation of copper and zinc such as effect of ph, extractant concentration, phase ratio etc. 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. Solvent extraction, consists of transferring one or more solute s contained in a feed solution to another immiscible liquid solvent. The experiment serves as a model of an important modern industrial process that combines aspects of organicinorganic synthesis and analysis. Products include specialized collectors used in the separation of copper sulfide ores and for copper containing byproduct metals, such as gold and molybdenum. The amount and quality of copper extraction are depend on various. Copper leaching, solvent extraction, and electrowinning. Status, operating practices and challenges in the african copper belt kathryn c. Liquidliquid extraction lle, also known as solvent extraction and partitioning, is a method to separate compounds or metal complexes, based on their relative solubilities in two different immiscible liquids, usually water polar and an organic solvent nonpolar. 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.
The need to bleed is increased and the purity of the copper cathode is potentially compromised, depending on the impurities being transferred cl, no3, fe, mn. Solvent extraction has been routinely used for copper refining since its invention in the 1960s, and it is suggested that well over 10% of refined copper production from ores is obtained by solvent extraction, accounting for millions of tonnes of metal. Extraction of copper at elevated feed concentrations. When the sulphuric acid copper lsxew flow sheet figure 1 was put forth by the minerals. It is suggested that complexformation and masstransfer diffusion is the predominant ratedetermining step in the copperii extraction process from aqueous solution into the polymeric particles. Copper solvent extraction was originally developed in the 1960s to recover copper from relatively dilute leach solutions, typically heap leach liquors with copper. A couple of refineries have adopted the solvent extraction sx process in place of the electrolytic route which is commonly employed for the purification of copper electrolyte with respect to various impurities. Recovery of copper from alkaline glycine leach solution. The international copper study group estimates that 16% of the refined copper production from ores in 2006 used sxew. Ppt solvent extraction powerpoint presentation free to. This proceedings documents the present status of the sxew business.
It is even more popular for refining copper from scrap. Journal of hazardous materials b120 2005 1118 solvent extraction applied to the recovery of heavy metals from galvanic sludge j. Development group of general mills in 1960 solvent extraction had. Copper recovery using leachsolvent extractionelectrowinning technology. We offer a broad range of solvent extraction reagents, collectors promoters, frothers, flocculants, and depressants. In addition, acid consumption in the cementation process exceeds that in solvent extraction electrowinning by about 1. 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 copperii sulfate solution. Our range of solvent extraction reagents are produced at our state of art facility.
The conversion of copper consists of a series of physical and electrochemical processes. Concentration of the copperii sulfate solution by solvent extraction. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Pdf this study includes solvent extraction and electrowinning of copper from leaching process. A multidisciplinary experiment for advanced undergraduate students has been developed in the context of extractive metallurgy. Copper can be extracted from nonsulphide ores by a different process involving three separate stages. Sxew solvent extraction and electrowinning are distinct metallurgical unit operations that recover high purity metal from leachate solutions. The sx process based on tbp tri nbutyl phosphate solvent is particularly effective in the separation of arsenic from the electrolyte. Us5895633a solvent extraction process for recovering. Pdf solvent extraction and separation of copper and zinc. Pdf hydrometallurgical treatment of complex copper sulfidic ores, byproducts and concentrates requires aggressive, oxidative leaching. 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. Solvent extraction sx of copperii from ammonia solutions proceeds similarly to that from acidic solutions, but complexation of metal m by ammonia ligands must be considered.
This wellestablished, remarkable hydrometallurgical achievement fills an important role in our technical ability to extract copper in an efficient and costeffective way. Growing role of solvent extraction in copper ores processing article pdf available in fizykochemiczne problemy mineralurgii 4242. 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. Copper recovery using leachsolvent extraction electrowinning technology. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. How hydrometallurgy and the sxew process made copper the. Solvent extraction has always proved itself very helpful as a recovery method for many components. Maccabe thiele method was introduced in design of copper solvent extraction configuration when copper solvent extraction technology started to be used for highgrade copper ore. There is a net transfer of one or more species from one liquid into another liquid phase, generally from aqueous to organic. The concentration of ore is required and it is done by the froth flotation method. 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. Concentration of the copperii sulphate solution by solvent extraction.
Solvent extraction article about solvent extraction by. Chemical kinetics and mechanisms in solvent extraction of. Solvent extraction and separation of copper and zinc from. Diaz this paper was published in the proceedings of copper 2010 vol. Pdf solvent extraction and electrowining from copper leaching.
An integrated process for copper extraction from a chalcopyrite concentrate in alkaline glycinate solutions has identi. Solvent extraction applied to mixed copper and zinc bearing materials by c. 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. The solvent extraction is a wellestablished method for separation and purification of copper the performance of ubiquitous components in the process affects the extraction efficiency. Trends covered are fiberreinforced plastic construction mixer box and settler designs, reverse flow settlers, and advanced mixer design. Copper recovery by solvent extraction has progressed from a technology with limited application for copper recovery from dilute sulfuric acid leach solution to a. The copper leaching, solvent extraction and electrowinning lxsxew. Solvent extraction research and development, japan vol. Oxime formulations can be tailored to meet individual customer requirements and are suitable for a wide range of leach solutions. Find details about the methods and significance of this type of extraction. Extraction of copper at elevated feed concentrations sgs. It relies on variations in the solubilities of different compounds in different substances. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from.
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