Pyrometallurgical extraction of zinc pdf files

The optimum conditions for zn and mn selective leaching from the pyrometallurgical sludge of pompey have been already found. But the generation of metal hydroxide precipitation near the cathode during the electrokinetic removal process could be the most serious factor that. This was the driving force behind the search for a new pyrometallurgical zinc refining technology, as it was felt that the enviroplas process coupled with a new refining technology would address the manganese issues, would be electrically powered, and would be environmentally acceptable. Gold extraction by chlorination using a pyrometallurgical. The pyrometallurgical recovery of zinc from the coarse. Scale up of pyrometallurgical processes in the extraction of lithium from minerals. Rodney jones is a chemical engineer and metallurgist with over 35 years of pyrometallurgical experience in a wide variety of processes that have been taken from concept to industrial implementation.

Primary metal production michigan technological university. It consists 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. Jun 16, 2015 instant access to the full article pdf. The electrode processes and the practical efficiency of electrorefining. It also discusses the typical test work conducted and how the data, combined with lessons learnt from recently built plants, is. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including, flow chart for the pyrometallurgical extraction of nickel from nickel sulphide, quarry, aggregate, and different kinds of minerals. The objective of this research was, on one hand, to study gold extraction from an alluvial material, through a pyrometallurgical. Pyrometallurgical processes and equipment mintek has been closely involved with the south african pyrometallurgical industry since the 1970s, and is a world leader in the development and implementation of dc arc furnace processes for smelting, fuming, remelting and slagcleaning. Arpae rare earth and critical materials workshop breakout session. Roasting, or heating in air without fusion, transforms sulfide ores into oxides, the sulfur escaping as sulfur dioxide, a gas. Zinc concentrate is converted from zinc sulfide to zinc oxide by roasting, and at the same time most of the sulfur is removed as sulfur dioxide. Nowinska et al pyrometallurgical slags as a potential source of selected metals recovery as zn, pb, fe and cu occur in slags from the current production mainly in the form of intermetallic compounds and oxides, these metals may be recovered in the fuming process metal oxides reduction with carbon.

Nowadays, the main smelting method is pyrometallurgy, which accounts for 85% of output in the world. Pyrometallurgical definition of pyrometallurgical by the. Ore concentration the leadrich ore, with a typical concentration range of 38% lead, must first be separated from other material the gangue. Download pyrometallurgical extraction of zinc pdf files. Pdf on jul 31, 2015, dean gregurek and others published lead and. Pdf the industrial application of zinc solvent extraction for the treatment of zinc residues and furnace dust was discussed. Physical preparation of primary and secondary raw materials for metal extraction. Technical note gold extraction by chlorination using a pyrometallurgical process m. Zinc processing, the extraction of zinc from its ores and the preparation of zinc. Historically extraction of zinc has been more difficult than extraction of other metals because at temperatures where metals such as iron typically begins to melt, zinc is a gas. The processes of pyrometallurgical metal extraction and refining. Good overall cobalt extraction was achieved, and approximately 100. These reactions involve numerous different solids, liquids, and gases, and are carried out using many diverse types of furnaces.

This presentation describes the pyrometallurgical processes used to extract lithium from spodumene and zinnwaldite lithium mica. Pyrometallurgical iron removal from a pgmcontaining alloy 169 introduction minteks conroast process recovers platinum group metals pgms from roasted or low sbearing concentrates in an ironrich alloy typically 70 to 85% fe during mild reductive smelting. A charge of the copperbearing slag material is treated in the first stage of the process with a hydrocarbonaceous or hydrogenous reductant in a rotary furnace, such as a topblown rotary reactor, rotating at. Pyrometallurgy, zinc, lead, iron suplhide, dust, imperial smelting process 1. S on the zinc extraction into the solution was studied in both routes of research thorsen et al.

Thermodynamic considerations for a pyrometallurgical extraction of. Extraction of zinc application of zinc refining process. Pdf the outotec direct zinc smelting process researchgate. Kinetics of reduction and oxidation reactions during. Zinc recovery from metallurgical slag and dust by coordination. In the periodic table, aluminum is a metal of group and.

Arpae rare earth and critical materials workshop breakout. From ancient times until the end of the 19th century the production of metals made almost exclusive use of pyrometallurgical processes. It also discusses the typical test work conducted and how the data, combined with lessons learnt from recently built plants, is being used to guide the design of. There are two ways of smelting copper, one is pyrometallurgy, the other hydrometallurgical. Pyrometallurgical article about pyrometallurgical by the. The conventional pyrometallurgical primary lead production process.

The high temperature laboratory in minteks pyrometallurgy division focuses on laboratoryscale studies for the minerals industry. Pyrometallurgical techniques the lead bullion is fed into a refining kettle. Removal of copper copper is the first of the impurities to be removed. This course also covers the basic mechanisms of roasting, smelting and refining processes. The parameters studied are carbon stoichiometry, ratio of sodium carbonate, sodium nitrate added, temperature and time of. Any subsequent processing of this alloy will inevitably require some form of iron. Pyrometallurgical refining of precious metals part 1. A pyrometallurgical reduction process for the recovery of copper and zinc from brass secondary slag bss was studied.

Jun 3rd 5th 2015, brno, czech republic, eu hydrometallurgical processing of blast furnace flue dust containing zinc jascisak jan1, havlik tomas1, hoang trung zuzana1, turek peter1 1technical university of kosice, slovak republic, eu abstract with every tonne of pig iron being produced, over 10kg of flue dust is generated. A cyclic, twostage process is disclosed for pyrometallurgical recovery of copper as a highgrade matte from molten slag material containing both dissolved andor entrained copper values. Chemical composition of iron sulphides contained in dust from. These separation techniques form the basis of thermal smelting and refining operations. Flow chart for the pyrometallurgical extraction of nickel. Principles of extractive metallurgy rakes h kumar email.

Lead concentrations can be 5070%, and the sulfur content of sulfidic ores is in the range of 1520%. Recovery of zinc and manganese from pyrometallurgy sludge. Pyro metallurgical extraction of zinc presently about 15 20% of the worlds zinc production comes from pyrometallurgical route. Finally, the zinc fuming from lead blast furnace slag is analysed by assuming chemical equilibia between the slag and the gas phases. The effect of leaching media concentration, temperature, and liquid to solid ratio l. Oct 29, 2011 pyro metallurgical extraction of zinc presently about 15 20% of the worlds zinc production comes from pyrometallurgical route. The most important operations are roasting, smelting, and refining. Over 10 million scientific documents at your fingertips. Pdf pyrometallurgical treatment of eaf dust to extract. General principles of production of metals by pyrometallurgy. Primary metal production pyrometallurgy deals with chemical reactions at high temperatures ranging from 100c up to 3000c.

Pyrometallurgy, extraction and purification of metals by processes involving the application of heat. Pyrometallurgical extraction of valuable elements in nimetal hydride battery electrode materials. Ancient pyrometallurgical zinc generated large amounts of slags. The major eaf dust treatment processes are pyrometallurgical at this time. One of the reasons is that there are a number of metallic products, copper, nickel, lead, zinc, etc. Pyrometallurgical treatment may produce products able to be sold such as pure metals, or. Recovery of zinc and manganese from pyrometallurgy sludge by. The brass secondary slag was characterized by xray diffraction, inductively coupled plasmaatomic. Natural leaching from ancient pyrometallurgical zinc sites has contaminated the soil closed to the deposits. Pyrometallurgy is a branch of extractive metallurgy. Use add reply to replyparticipate in a topicdiscussion most frequent. Extraction processes of pure metals by hydrometallurgical operations.

Dusts emitted by the plant are much diversified in terms of chemical. Some veins of ore lie as deep as several thousand feet but most deposits lie close to the surface. The pyrometallurgical recovery of zinc from both ash and dust samples was carried out, and parameters affecting recovery processes such as time, temperature, and flux percentage were studied. Innovative hydrometallurgical processes for the primary processing of zinc. Pyrometallurgy article about pyrometallurgy by the free. Electrokinetic removal technology was adopted to treat this slags. The separation of metallic zinc from its ores by pyrometallurgy is much more. Article pdf available in mineral processing and extractive. Pyrometallurgy, mintek, dc arc furnace, plasma, smelting, chromite, ilmenite, cobalt, slag, zinc fuming, dust, magnesium, laterite, ferronickel, arc modelling, pyrosim. In most instances, both phases are molten such as the matte and slag in a conventional copper smelting operation.

In this contribution, a hydrometallurgical process is specifically developed to recover zinc zn, manganese mn and lead pb from the pyrometallurgical sludge produced in the steel manufacturing industries. Zinc concentration is in the range of 4060%, with sulfur content in sulfidic ores in the range of 2634%. Bapo systems to analyse the main chemical reactions encountered in the pyrometallurgical processes for zinc extraction, roasting of sulfides, and removal of phosphorus from molten metal, respectively. Gas selective reductionoxidation redox and melting separation were consecutively applied to electrode materials of ab5type nimetal hydride batteries leading to the production of a nico alloy and slag enriched with rare earth oxides reo. The article deals with a sophisticated approach to the study of basic kinetic dynamic process in metal production. Scale up of pyrometallurgical processes in the extraction of. The most commonly available ore used in the extraction of zinc is called zinc blende also known as zinc sulphide zns. Thus lead is also a coproduct of zinc, copper and silver production making the extraction of lead more economic than if it occurred in isolation. Zinc is extracted from the purified zinc sulfate solution by electrowinning. Us4032327a pyrometallurgical recovery of copper from. The reader is cautioned that the following chemical reactions are overly simplified versions of the actual processes. Pyrometallurgy the science and technology of hightemperature metallurgical processes. Galvanic sludge metals recovery by pyrometallurgical and. Reduction kinetics of zinc powder from brass converter slag.

The rockwater slurry is subjected to physical and chemical actions i. Experimental investigation of pyrometallurgical treatment of zinc. Flow chart for the pyrometallurgical extraction of nickel from nickel sulphide products. Introduction manufacturer the miasteczko slaskie zinc smelting plant is the only zinc and lead in europe that uses the isp imperial smelting process pyrometallurgical process. Large amounts of zinc ash and flue dust, containing more than 80% zinc, are accumulated during galvanization processes at the surface of molten zinc bath and in the chimney, respectively. Solvent extraction in the primary and secondary processing. Specifically, the effect of reduction temperature and time on the conversion to metallic phases was investigated. Zinc smelting is the process of converting zinc concentrates ores that contain zinc into pure. Identification and description of mineral processing sectors. Chemical composition of iron sulphides contained in dust. As an example, zinc ore concentrate includes several metals, such as indium, defined as a critical metal by the european commission 1.

Lead and zinc ore is mined almost exclusively in underground operations. Recovery of zinc and manganese from pyrometallurgy sludge by hydrometallurgical processing article in journal of cleaner production 168 september 2017 with 2 reads how we measure reads. Metallurgical slag and dust msd from lead and zinc smelting, steel dust and. Introduction the miasteczko slaskie zinc smelting plant is the only zinc and lead manufacturer in europe that uses the imperial smelting process isp pyrometallurgical process. Introduction to the techniques used to refine gold, silver, platinum, palladium and other platinum group metal ore and scrap metal using pyrometallurgy. Pyrometallurgy usually adopts original ore, in which its content can reach 20%30% after mineral processing. The pyrometallurgical process is suitable for iron ore, chromite, lead, zinc, copper, tin, and tungsten. Zinc smelting is the process of converting zinc ores into pure zinc. The results suggest that the zinc extraction from blast furnace dust slurry. Pdf zinc solvent extraction in the process industries researchgate. Gold extraction by chlorination using a pyrometallurgical process. The first commercial plant to use zinc sx for the mainstream processing of a lowgrade ore is under construction and promises to become one of. The second route of research deals with possibilities of zinc compound recovery from acid or alkaline solutions.

The pyrometallurgical processing of galvanizing zinc ash and. The horizontal and vertical retort processes and electrothermal process were used in the past for zinc production but have become obsolete due to high power consumption and low recovery. Pyrometallurgy is the principal and oldest branch of metallurgy. Lead and zinc ore is mined almost exclusively in underground operations, though a few surface operations do exist. A multidisciplinary team of metallurgists, mineralogists, earth scientists, engineers, and chemists is able to address most metallurgical aspects of pyrometallurgical processes. In the case of molten zinc, neodymium and iron will be dissolved forming a znndfe alloy. Using add reply allows you to attach images or pdf files and provide a more complete input. The gas phase may also be used to advantage, either as a means of separating valuable volatile constituents or for removing unwanted volatile impurities.

Scale up of pyrometallurgical processes in the extraction. Zinc processing britannica encyclopedia britannica. Pyrometallurgy, zinc, lead, imperial smelting process, sintering machine, zinc oxide, accompanying elements 1. The extraction of zinc from sulphide minerals is carried out by two. The pyrometallurgical recovery of zinc from the zinc ash processing technologies is the formation of zinc in the metallic the influence of hydrochloric acid on the zinc extraction from flux skimming. Pyrometallurgy follows one or more of the following processes. Lead bullion contains many other metallic impurities including antimony, arsenic, copper, tin and zinc.

Zinc smelting has historically been more difficult than the smelting of other metals, e. The processes employed for solu tion concentration and purification in the hydrometallurgical processing of include manganese precipitation, cementation, solvent extraction and ion exchange. The results should be reported to the responsible authorities and relevant parties, as required. Reduction kinetics of zinc powder from brass converter. Accompanying elements in zinc oxide emitted from a. Sep 15, 2014 introduction to the techniques used to refine gold, silver, platinum, palladium and other platinum group metal ore and scrap metal using pyrometallurgy. In this lesson, were going to discuss the extraction of four metals.

Pyrometallurgical extraction of valuable elements in ni. Chemextractionexperimental investigation of pyrometallurgical treatment of zinc 2018. Us4032327a pyrometallurgical recovery of copper from slag. Pyrometallurgical iron removal from a pgmcontaining alloy. Pyrometallurgical extraction of valuable elements in nimetal. In this paper, the kinetics of extraction process of tin metal from egyptian cassiterite concentrate using the alkaline molten salts as fluxing agents as well as the mechanism of reduction process were investigated. Zinc zn has been known from ancient times as an alloy with copper. Pyrometallurgical treatment of eaf dust to extract zinc metal. The treatment produces saleable products metals or intermediate compoundsalloys impure metals for further processing refining.