Stages of hydrometallurgical processes supervisor dr. Hydrometallurgy article pdf available in metals open access metallurgy journal 65. Alaska is blessed with numerous lode gold ores that would require cyanidation for gold recovery. These reactions involve numerous different solids, liquids, and gases, and are carried out using many diverse types of furnaces. The number of extractant molecules involved in the formation of the extracted species depends on the oxidation status of the metal ions, the number of pos sible locations for the bonds. It involves heating in a blast furnace at temperatures above 1500c to convert waste to a form that can be refined. Hydrometallurgy article about hydrometallurgy by the free. The extensive reference listover 850makes this set a. Learning objectives of the course knowledge of various techniques, unit process and operations used in metal extraction and refining. In principle any system which achieves mixing and separation of phases, can be used for solvent extraction in hydrometallurgy. General principles of production of metals by pyrometallurgy.
It is a technique within the field of extractive metallurgy involving the use of aqueous chemistry for the recovery of metals from ores, concentrates, and recycled or residual materials. Sep, 2012 ebs 315 l2 intro hydrometallurgy sept 2012 free download as powerpoint presentation. Both types have mostly an ion structure and the metal atoms are characterised by high coordination numbers, often 6 or 8. Hydrometallurgy is typically divided into three general areas. Processing techniques that complement hydrometallurgy are pyrometallurgy, vapour metallurgy, and molten salt electrometallurgy. In the processes of hydrometallurgy of rare earths, a huge amount of wastewater, waste solid, and offgas are generated. This is an excellent manual for anyone studying mining, metallurgy, and of course, hydrometallurgy. Hydrometallurgy refers to the application of aqueous solutions for metal recovery from ores, and has been practiced for copper recovery for many years. Apr 17, 2014 this video shows the refining process steps for leaching precious metals used by professional refining companies. Immiscibility of metal and slag together with density difference forms the basis for separation. Hydrometallurgy versus pyrometallurgy pyrometallurgy. Slide 7, 8 smelting is the most common of pyrometallurgical operations. Hydrometallurgy applies the science and technology of aqueous solution chemistry to develop effective, efficient and environmentally safe methods for the recovery of metals from any of a number of metalbearing sources, but predominantly ores and concentrates.
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. Chiranjib kumar gupta bhabha atomic research centre materials group mumbai 400085 india this book was carefully produced. Overview of the hydrometallurgical processes for the. Ebs 315 l2 intro hydrometallurgy sept 2012 metals. Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions.
Content introduction process stages leaching solution concentration and purification metal recovery hydrometallurgy versus pyrometallurgy conclusion references 2. Hydrometallurgical processing of eudialyte bearing concentrates to. Overview of the hydrometallurgical processes for the recovery of metals from weee high tech recycling interuniversity research center i. This leads to a decrease in ph value of the solution which subsequently affects the extraction of metals negatively 32. Majority of metals are extracted by pyrometallurgical. Electromagnetic forming metal cap a figure 2 sealing ring fieldshaper, ceramic tube b figure 3 contactless assembly of a dc motor stator the assembly of maintenancefree ball joints and. Primary metal production pyrometallurgy deals with chemical reactions at high temperatures ranging from 100c up to 3000c. Stages of hydrometallurgical processes linkedin slideshare. For a variety oftechnical and economic reasons, theseoresoften cannot beprocessed by normal.
View pyrometallurgy ppts online, safely and virusfree. Hydrometallurgy mcclelland laboratories inc reno 775 3560. Nevertheless, author and publisher do not warrant the information contained therein to be free of errors. Hydrometallurgy, which involves the use of aqueous solutions for the recovery of metals from ores, concentrates, and recycled or residual material, plays an integral role in the multibillion dollar minerals processing industry. Two distinct processes are involved in hydrometallurgy. Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties topics covered include. Hydrometallurgy mcclelland laboratories inc reno 775. Pyrometallurgy, or the use of heat for the treatment, includes smelting and roasting. It consist of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals. To apply the fundamental knowledge for design of a reactor and process flow sheets. Hydrometallurgical approach for leaching of metals from copper rich side stream originating from base. Copper concentrate recovered to metal, via sxew or direct ew is the standard processing route. Hydrometallurgy is a method for obtaining metals from their ores. View hydrometallurgy ppts online, safely and virusfree.
The first days are dedicated to in depth lectures on the various unit operations of hydrometallurgy l eaching, solvent extraction, electrochemistry. Athy is a 4 days intensive shortcourse in hydrometallurgy gathering renewed international experts from europe, canada and south africa both from academia and industry. The work of frank forward our department head from 19451954 and other collaborators, led to the development of the sherritt process for the hydrometallurgical recovery of nickel and cobalt from sulphide concentrates. Omc have experience in leaching copper from low and high grade oxide deposits via heap leaching and tank leaching, as well as sulphide concentrate leaching via low and high temperature pressure oxidation process. Readers are advised to keep in mind that statements, data, illustrations, procedural details or other items may. Hydrometallurgical process development for complex ores. In hydrometallurgy, two types of oxides are important. Hydrometallurgical process development for complex ores and.
Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on. In recent years, the principle and theory behind solvent extraction has gained wide acceptance as one of the new tools of modern hydro metallurgy. Hydrometallurgy involve the use of aqueous solutions for the recovery of metals from ores, concentrates, and recycled or residual materials. Especially, there are many types of wastewaters such as acidic, alkaline, ammonium, fluorine wastewaters with radioactive element, heavy metal ions, and. Responsibility first tutorial symposium on hydrometallurgy, may 19 and 20, 1972.
Hydrometallurgy process development alaska division of. Principles of extractive metallurgy, volume 2 hydrometallurgy by fathi habashi chinese translation ti qu yie jin yuan li, volume 2 307 pages. The most important structures of the binary oxides, considered in hydrometallurgy, are presented in table 2. How copper is extracted, crushed, and sent to the two major processing methods. Hydrometallurgy process development hydrometallurgical process development for complex ores and concentrates david dreisinger university of british columbia department of materials engineering 3096350 stores road vancouver, b.
Following separation and concentration by mineral processing, metallic minerals are subjected to extractive metallurgy, in which their metallic elements are extracted from chemical compound form and refined of impurities. Electrometallurgy electrolysis process to extract metal. Hydrometallurgy definition of hydrometallurgy by the. Ebs 315 l2 intro hydrometallurgy sept 2012 free download as powerpoint presentation. Metallic compounds are frequently rather complex mixtures those treated commercially are for the most part sulfides, oxides. Omc understand the issues in complex hydrometallurgical processing with expertise in a wide range of commodities including. This video shows the refining process steps for leaching precious metals used by professional refining companies. Hydrometallurgy permits construction of smaller scale installations than are possible with pyrometallurgy. Hydrometallurgy it involoves the precipitation of metal in an aqueous solution. Process, ravensthorpe and murrin murrin in australia and meta cobalt.
It also highlights ion exchange, carbon adsorption and solvent extraction processes for solution purification and concentration. Abstract for more than 10 years, a revival of the interest for the partitioning of high active nuclear wastes. Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. The treatment of metal or the separation of metal from ores and ore concentrates by liquid processes. The original impetus for solution methods for copper extraction before the development of froth flotation technology was the existence of large ore bodies of low copper content which were. Hydrometallurgy powerpoint ppt presentations powershow. Hydrometallurgy is the widest field of extractive metallurgy. Each extractive situation must be assessed on its own merits by the. Citescore values are based on citation counts in a given year e. Hydrometallurgy overview orway mineral consultants. Within the research program, complex sulfide ores are treated by ferric chloride leaching to dissolve zinc, lead, copper and silver.
Unit processes in extractive metallurgy hydrometallurgy. The extraction and recovery of metals from their ores by processes in which aqueous solutions play a predominant role. This book covers the thermodynamics of chemical reactions, leaching chemistry, particle characterization, mass transfer, reactor design, phase separation, solvent extraction, ion exchange, electrowinning, and more. Hydrometallurgy results in a final metal product for domestic use or export, rather than a sulfide concentrate. However, thereare probably other factors that have contributed towards this trend. Pdf hydrometallurgy, which involves the use of aqueous solutions for the recovery of metals from ores, concentrates, and recycled or residual. As a practical matter, however, the extractive metallurgy industry has pretty widely adopted the mixersettler concept.
Pyrometallurgy pyrometallurgy is the branch of extractive metallurgy. Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit. The university of british columbia and the department of materials engineering have a rich history in the field of hydrometallurgy. Silver, gold, platinum, palladium and the other platinum group metals. This twovolume set provides a full account of hydrometallurgy.
Pyro and hydrometallurgical copper processing p3 youtube. Leaching in the leaching process, oxidation potential, temperature, and ph of the solution are important parameters, and are often manipulated to optimize dissolution of the desired metal component. Slide 15 leaching involves preferential dissolution through water solvation, acidalkali attack, baseexchange reaction, complex ion formation and oxidationreduction reaction. Hydrometallurgy is a technique within the field of extractive metallurgy, the obtaining of metals from their ores. The operations usually involved are leaching, or dissolution of the metal or metal compound in water, commonly with additional agents. Apr 05, 20 stages of hydrometallurgical processes supervisor dr. Filled with illustrations and tables, this work covers the flow of source material from the mined or concentrate state to the finished product. This treatment may produce pure metals,intermediate.
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