in the refining process into products, some elements contained in the scrap such as zinc turn into dust with the supplementary materials added in electric arc furnace refining process and are discharged outside the furnace [9]. Advanced Metals. And its other impurities of gold or silver or platinum will remain behind. Silver derived from copper and its derivatives, including copper sulfide, requires different handling and refining techniques than silver minerals taken from zinc deposits and lead sources. ZnCore is an integrated metals production and refining company specialized in the sustainable processing of Electric Arc Furnace Dust (EAFD) … To extract silver from copper-containing ores, an electrolytic refining process is used. The refining process is applied in several steps in kettles with addition of specific agents alternatively smaller quantities are processed by electrolytic refining. It is based upon the phenomenon of electrolysis. The reaction of the final step of extraction of zinc is. These pro-cesses can operate at atmospheric pressure or as pressure leach circuits. Our Experience Dedicated to Your Success More Than a Pump Supplier Sulzer Pumps supplies a complete pumping package for metal processing industry, from clear liquid to light slurry process to submersible and dewatering pumps including full services and support. Refining process for the recovery of zinc metal from iron-containing galvanization mattes, scrap and residues of zinc... 2. Prior art keywords solusion refining zinc sulfate sulfate zinc Prior art date 1975-06-04 Legal status (The legal status is an assumption and is not a legal conclusion. Once its removed from the earth, the concentrate is roasted at a temperature of 950 degrees Celsius, causing zinc, sulfur and iron oxidization. Refining produ cts are zinc SHG (special The zinc mining process is conducted primarily underground, with more than 80 percent of all zinc … PHELPS DODGE REFINING CORP. Jan.5 1968 Feb. 15 1967 No.903/68. Its impurities of iron and zinc will dissolve in the copper sulphate solution. The calcine is first leached in a neutral or slightly acidic solution (of sulfuric acid) in order to leach the zinc out of the zinc oxid… Your email address will not be published. Prolonged exposure of copper pyrites to air and rain leads to the formation of dilute solution of copper sulphate. The latter accounts for approximately 80% of total zinc refining. The carbon from coke acts as the reducing agent in this reaction. There are still lead and cadmium vapor impurities. Refining of zinc and its cadmium content, can be accomplished by treating the zinc concentrates and/or zinc-bearing secondary materials using either a hydrometallurgical or pyrometallurgical process. In India, Hindustan Zinc was established in 1966.In India, Hindustan Zinc was established in 1966. Zinc refining is the process of purifying zinc to special high grade (SHG) zinc, which is at least 99.995% pure. Here the Zinc Oxide gets reduced to metallic Zinc. The sulphur content can be reduced hugely with this process. Fractional Distillation - This process aids to separate cadmium from zinc. It … refining of zinc (the Zincref process) has been developed. In electric arc furnace steelmaking process, about 15~25kg of dust is known to be generated per 1 ton of crude steel Flue dust, zinc-refining By-product of refining of zinc ores consisting primarily of zinc, lead and iron. METHOD FOR THE RECOVERY OF ZINC AND CHLORIDE FROM WASTE LIQUORS ... Titan JV. During electrolytic refining process, pure zinc gets deposited at the cathode. This process purifies the zinc through the recovery and separation of valuable metals. The Zinc Mining Process. The oil wets the metal and the water wets the gangue. Heading C7B. The zinc mining process is conducted primarily underground with more than 80 percent of all zinc . Learn about metals that have shaped the course of humanity only at BYJU’s. The remaining and important step in the zinc production and refining process is the separation of the iron and zinc in this solution. Calcining, or roasting, is a high-temperature process (700 to 1000 °C) that converts zinc sulphide concentrate to an impure zinc oxide called calcine. The iron and aluminium impurities sink to the bottom in the form of a solid or liquid. Get Price; GB1206021AProcess and cathode sheet for electrolytic . In the ISP, ZnO is reduced by carbon to produce zinc. Get Price; GB1206021AProcess and cathode sheet for electrolytic . Zinc refining is the process of purifying zinc to super high grade (SHG) zinc, which is at least 99.995% pure. As an integrated manufacturer involved in all stages from mine development to metal smelting and refining, TOHO ZINC is a reliable supplier of zinc products and has earned a 20% share of the Japanese market. Zinc batteries have been used for many decades. Zinc-carbon batteries are the longest established primary battery type and are in applications such as remote controls, flashlights, toys and electronics. Therefore, in the first column the zinc is heated above its boiling point and allowed to rise to a condenser. 1 206 021. Zinc from the shaft furnace is subject ed to refining by three lead columns, two cad mium columns, one redistillation column and one bab y column. 1) The impure meal is made to … Secondary (recycled) zinc material, such as zinc oxide, is also processed with the zinc sulfide. Zinc Blende does not contain a very high percentage of zinc and hence it needs to be concentrated. The global zinc industry is currently experiencing unprecedented interest in new developments and expansions. Removal of Copper Copper is the first of the impurities to be removed. A smelting plant stops at the stage of the fusion-reduction plant; it will produce what is known as hard or Antimonial Lead. Electrolytic refining. Commercial Group. The crust is removed, and the metals undergo a distillation process to remove the zinc from the silver. The major types of zinc ore deposits are generally found to be sediment-hosted, volcanic-hosted, intrusion-related, Broken Ore type or Mississippi Valley Type. Heading C7B. The best concentration method for zinc ore is known as froth flotation. The latter accounts for approximately 80% of total zinc refining. There are various refining methods, but the refluxing process is the most commonly used. Oxidized zinc ore The Waelz process has been was initially developed to process zinc oxidized ore containing between 15 and 30% zinc. Collectors (pine oils, fatty acids etc) increase the wettability of the metal part of the ore and allows it to form a froth and Froth Stabilizers (cresols, aniline etc) sustain the froth. … Copper refining is done by the electrolytic process. This crude metal is called Spelter. The reaction occurring here is, Zinc Oxide is then mixed with Coke and ground into fine pieces and heated at 1673 K in fire clay containers in a process which is also known as the Belgian Process. The most commonly available ore used in the extraction of Zinc is called Zinc Blende also known as Zinc Sulphide (ZnS). The impurities will either dissolve or be found in a heap at the base of the anode. Electro-refining of copper nickel and zinc. As the zinc in the bismuth refining slag existed mainly as zinc chloride, which was readily soluble in water, a water leaching was chosen to treat the slag first. PHELPS DODGE REFINING CORP. Jan.5 1968 Feb. 15 1967 No.903/68. Refining of copper, lead, zinc, tin, and some other metals have been described . The zinc, copper, cadmium and iron are dissolved by the hot acid leach. https://www.lme.com/en-GB/Metals/Non-ferrous/Zinc/Physical, https://en.wikipedia.org/w/index.php?title=Zinc_refining&oldid=878607014, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 January 2019, at 21:13. Copper refining is done by the electrolytic process. Regulatory process names 9 CAS names 1 IUPAC names 7 Trade names 5 Other identifiers 1 Lead is commonly used in lead-acid battery production and in many other products such as ammunition, light bulbs, televisions, and X-Ray radiation protection. The zinc leaves out the bottom as a refined liquid, while the cadmium leaves out the top as vapor. Froth Flotation process is mainly used to remove gangue from sulphide ores. Typically, primary the zinc industry is concentrating their valuable ‘minor-metals’ such as Ag, Pb and Cu into saleable by-products. Ore Concentration Refining. Consequently, a refining waste slag is generated during the refining of the crude bismuth by chlorine (Xiong and Xiao, 2005). In order to remove the lead 2-3% of the vapor is condensed, which draws the majority of the lead out of the vapor; down to the point where it is only 0.003% of the total contents. the pyrometallurgical process, ore concentrate containing lead, zinc, or both is fed, in some cases after sintering, into a primary smelter. Its impurities of iron and zinc will dissolve in the copper sulphate solution. Zinc Manufacturing. The subsidiary is owned 100% by Nyrstar, the world's biggest producer of zinc and a leading company in lead, silver, gold and copper. Zinc refining is the industrial purification of zinc by distillation or extraction. In this context, a novel hydrometallurgical process was proposed to achi eve the preferential leaching of valuable metals zinc, lead, and silver from bismuth refining slag while minimizing the extent of Through this process, zinc is produced as a major product and by-product is Cadmium. Zinc smelting is the process of converting zinc concentrates (ores that contain zinc) into pure zinc. Due to its very low boiling point, at such temperatures, zinc will escape with exhaust gases. A new process for the thermal refining of zinc: A case study of technology Western Grade (PWG) zinc (after liquation from a conven-tional ISP lead-splash condenser). The main innovation of the technology was the switch from an energy transfer limited process to a mass transfer limited process (for which a patent has been registered). Lead Refining Plant:(Pyrometallurgical techniques) The Lead Bullion is fed into a refining kettle. These pro-cesses can operate at atmospheric pressure or as pressure leach circuits. [1] This process is not usually required when smelting of zinc is done through electrolysis processes, but is needed when zinc is produced by pyrometallurgical processes, because it is only 98.5% pure. The next step in the extraction of zinc is called Roasting. About ZnCore. The main ingredients of the froth flotation are the Collectors and Froth Stabilizers. It can be further purified by fractional distillation. Zinc processing, the extraction of zinc from its ores and the preparation of zinc metal or chemical compounds for use in various products. The New Jersey Zinc Company invented this process in 1930. Early on in the evaluation of the Gamsberg project, it became evident that the refining of PWG zinc would play an important part in the economic viability of the project. A ore concentration b smelting c refining a ore concentration lead and zinc ores usually sphalerite zns often occur together and may also contain silver copper and gold the ore has first to be separated from clays and other silicates gangue after which the lead ore and the zinc ore get price cyanide leaching of gold get price The lead bullion is melted at about 300–600 °C and held just above its melting-point when solid copper rises to the surface and is skimmed off. ... By electrolytic refining: In this process, the impure zine is made anode while a plate of pure zinc is made the cathode. Zinc-chloride batteries are an improved version of the zinc-carbon cells; they have a longer life and a steadier voltage output. Umicore Precious Metals Refining offers valuable recovery services to the zinc industry. Zinc products play a key role in the achievement and maintenance of high living standards, and TOHO ZINC contributes to society by manufacturing such products. Zinc Oxide is then mixed with Coke and ground into fine pieces and heated at 1673 K in fire clay containers in a process which is also known as the Belgian Process. Four processing stages are generally used in hydrometallurgic zinc refining: calcining, leaching, purification and electrowinning. Refining of zinc and its cadmium content, can be accomplished by treating the zinc concentrates and/or zinc-bearing secondary materials using either a hydrometallurgical or pyrometallurgical process. In 1374, Zinc was discovered & the 8th metal known to man. The jarosite process of electrolytic refining of zinc is extended and improved by treating the jarosite residues to recover valuable by-products. PROCESS FOR THE RECOVERY OF ZINC, LEAD, SILVER AND ASSOCIATED VALUE METALS FROM VARIOUS MATERIALS EAFD - Patent. Your email address will not be published. The ore is powdered and a suspension is created in water. This frothy metal is skimmed off the top and dried to recover the metal. Refining process for zinc recovery 1. Finally the vapor is pumped into the cadmium column where it is cooled to an intermediate temperature below the boiling point zinc, but still above the boiling point of cadmium (767 °C (1,413 °F)). Zinc refining is the process of purifying zinc to special high grade (SHG) zinc, which is at least 99.995% pure. Steam Distillation - Mainly we get essential oils from flowers using this method. 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The Zinc Mining Process. The reaction of the final step of extraction of zinc is After the zinc and iron oxides are reduced to powder form and leached with diluted sulfuric acid, the solution is neutralized an… The Zinc Mining Process. Products that can be used for zinc refining: Zinc metal; Zinc alloys; Zinc top dross Here, crude zinc is chosen as anode and Z n S O 4 is the chosen electrolyte. Lead is produced in concentrate (a dry-powder) as a co-product from our zinc refining process. Simple Distillation - Usually liquids are separated from solids or other non-volatile substances. Lead bullion contains many other metallic impurities including antimony, arsenic, copper, tin and zinc. Zinc vapour passes through the Condenser where it gets absorbed by lead .The lead is cooled to separate zinc and the molten zinc is passed through Double distillation column for further refining. Currently the only pyrometallurgical The basic steps in this process include (1) preparation of a zinc sulfate solution by leaching zinc oxide calcines (produced by the roasting of sulfide concentrates) in dilute sulfuric acid, (2) purification of the resulting zinc sulfate solution, and (3) electrolysis of the purified solution. Leaching and precipitation of zinc . The zinc mining process is conducted primarily underground, with more than 80 percent of all zinc extracted beneath the Earths surface. Electro-refining of copper nickel and zinc. Concentration of Ore: Froth Flotation Process. Zinc products play a key role in the achievement and maintenance of high living standards, and TOHO ZINC contributes to society by manufacturing such products. High purity zinc is required industrially to avoid zinc pest, a slow distortion and cracking of zinc die castings caused by impurities precipitating out. Once copper … Silver is also recovered from the lead refining process. Zinc alloys with many other metals: Nickel silver, bronze, brass and soft electrical solder all contain zinc. The zinc blast furnace process is one of the newest pyrometallurgical processes developed by Imperial Smelting Processing Limited in England. arsenic, copper, tin and zinc. The ore is placed in an electrolytic cell, which contains a positive electrode, or anode, and a negative electrode, or cathode, in an electrolyte solution. Our Experience Dedicated to Your Success More Than a Pump Supplier Sulzer Pumps supplies a complete pumping package for metal processing industry, from clear liquid to light slurry Zone refining is a special method we use to purify metals. In the most common hydrometallurgical process for zinc manufacturing, the ore is leached with sulfuric acid to extract the lead/zinc. These by-products from the zinc industry are globally sourced by Umicore to recover the valuable metals. The best concentration method for zinc ore is known as froth flotation. get collected below the anode as anode mud. In the most common hydrometallurgical process for zinc manufacturing, the ore is leached with sulfuric acid to extract the lead/zinc. This also converts the Zinc Blende to ZnO which is way more reactive. The process produces fractions that can be directly routed back to a steel plant (leach residue), a zinc electrowinning process (pregnant leach solution, PLS), and a … Four processing stages are generally used in hydrometallurgic zinc refining: calcining, leaching, purification and electrowinning. A pyrometallurgical refining process for obtaining one or both of zinc and lead from a sulfide concentrate, in which an iron-silicate slag or iron-silicate slag containing lime is formed and the sulfide concentrate, incombustible materials, and flux, together with at least one of industrial oxygen, oxygen-enriched air, or air, are blown into the slag to cause a reaction; as a result of the reaction, the major … Calcining, or roasting, is a high-temperature process (700 to 1000 °C) that converts zinc sulphide concentrate to an impure zinc oxide called calcine. Process according to claim 1 in which the addition of the metal is carried out at a temperature comprised between the... 3. The impurities of zinc, nickel, iron, etc. The New Jersey Zinc Company invented this process in 1930. In 1743, the first Zinc smelter was established in U.K. Google has not performed a legal analysis and makes no representation as to the accuracy of the … History of zinc Zinc was discovered in the metallic form. 3.1. Lead concentrations can be 50-70%, and the sulfur content of sulfidic ores is in the range of 15-20%. The concentrated ore is finely ground into small pieces and then suspended in a rising stream of air. The zinc mining process is conducted primarily underground with more than 80 percent of all zinc . Required fields are marked *, General Principles and Processes of Isolation of Elements. Lead/zinc is recovered from solution by electrowinning, a process simi-lar to electrolytic refining. Clean cemented carbide inserts and compacts are converted to powder by the zinc process (treatment with molten zinc which is dissolved in the cobalt phase and is then distilled off, leaving a spongy material which is easily crushed). The PBSIM & BFS team was directly involved (process tests and development, engineering concept) with the Shairmerden zinc oxide ore deposit located in Kazakhstan where 200,000 tpy of ore is processed by the Kazzinc Ridder plant utilizing 2 existing rotary Waelz kilns. Removal of Copper Copper is the first of the impurities to be removed. *Cupellation is a refining process in metallurgy, where ores or alloyed metals are treated under high temperatures and controlled operations to separate noble metals, like gold and silver, from base metals like lead, copper, zinc, arsenic, antimony or bismuth, present in the ore. The process take advantage of the relatively low boiling point of zinc (907 °C (1,665 °F)) as compared to the impurities being removed in the first "column": iron and aluminium. A method for recovering a substantially impurity-free zinc oxide product from steel-making flue dust or a similar material which comprises leaching the flue dust with concentrated ammonia and carbon dioxide to dissolve zinc and unwanted impurities, cementing the leach filtrate with zinc to remove copper, cadmium, and lead impurities, conducting a steam distillation on the cementation filtrate to precipitate … Four processing stages are generally used in hydrometallurgic zinc refining: calcining, leaching, purification and electrowinning. Calcining, or roasting, is a high-temperature process (700 to 1000 °C) that converts zinc sulphide concentrate to an impure zinc oxide called calcine. 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 Heart of Your Process Sulzer Pumps for Zinc Refining Applications. Flue dust, zinc-refining By-product of refining of zinc ores consisting primarily of zinc, lead and iron. By working together with Sulzer, customers benefit from: The PBSIM & BFS team was directly involved (process tests and development, engineering concept) with the Shairmerden zinc oxide ore deposit located in Kazakhstan where 200,000 tpy of ore is processed by the Kazzinc The carbon from coke acts as the reducing agent in this reaction. Eight percent of zinc is mined in open pits, with the remaining 12 percent being mined through both methods. PROCESS FOR THE RECOVERY OF ZINC, LEAD, SILVER AND ASSOCIATED VALUE METALS FROM VARIOUS MATERIALS EAFD - Patent. The wet jarosite residue is acidified with sulphuric acid from the refining process acid plant to redissolve the iron sulphate, producing a liquid containing dissolved plant nutrients. There are various refining methods, but the refluxing process is the most commonly used. * High Temperature Technology Division, Mintek, Randburg. Uses Of Zinc 1. The importance of economics and time involved in refining process has been stressed, Introduction IT will be my endeavour in this paper to indicate the fundamentals of refining as. Regulatory process names 9 CAS names 1 IUPAC names 7 Trade names 5 Other identifiers 1 Silver is found embedded in several different minerals, namely copper, zinc and lead, and the refining process varies depending on the source. The production process produces two bleed streams that require treatment: a weak acid from the wash tower and an electrolyses bleed. This particular refining process against impurities is further classified into sub-categories. The Heart of Your Process Sulzer Pumps for Zinc Refining Applications. Zinc concentration is in the range of 40-60%, with sulfur content in sulfidic ores in the range of 26-34%. Zinc (Zn) is a metallic element of hexagonal close-packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. This is achieved in practice through a process called double leaching. Froth Flotation process is mainly used to remove gangue from sulphide ores. Copper can be precipitated from this solution by the addition of scrap iron. Since, the boiling point of Zinc is way back at 1180 K, the zinc formed immediately vaporizes and distills over leaving behind non-volatile impurities such as Cadmium, Lead and Iron. they are applied to the more common members of this group, with a description of some of the processes, and, in doing so, I Paddles and air constantly stir up the suspension to create the froth. The Waelz process has been was initially developed to process zinc oxidized ore containing between 15 and 30% zinc. Refining Process of Lead in Detail: a. Zinc Manufacturing. Sulfur is stirred into the melt to facilitate the operation by producing a dry powdery dross which is more readily removed. The quantity of metal deposited from an electrolyte is in accordance with the laws enunciated by Faraday, which state in effect: (1) that the quantity is proportional to the number of ampere-hours, and (2) that a given number of a… Table of ContentsImpurities in SpelterMethods of Preventing Contamination of SpelterRefining Spelter by RedistillationConverted Smelting Furnace MethodDe Saulles MethodResults in Refining by RedistillationGrade of Metal ChargedGrade of Refined ZincYield of Refined ZincByproductsRedistilling MethodsMethods of Refining by Remelting Long ago, zinc refining had not become a general practice … This process is not usually required when smelting of zinc is done through electrolysis processes, but is needed when zinc is produced by pyrometallurgical processes, because it is only 98.5% pure.. Zone Refining. Lead/zinc is recovered from solution by electrowinning, a process simi-lar to electrolytic refining. Here the Zinc Oxide gets reduced to metallic Zinc. Refining Process of Lead in Detail: a. ... ZnCore is an integrated metals production and refining company specialized in the sustainable processing of Electric Arc Furnace Dust (EAFD) and Spent Pickle Liquor (SPL). Zinc Blende does not contain a very high percentage of zinc and hence it needs to be concentrated. While most of the new projects and plant upgrades remain committed to traditional processing technologies, recent advances in zinc solvent extraction have created opportunities for new process routes in the treatment of both primary ore and secondary materials. This gas containing zinc vapours is collected and cooled to yield solid zinc. At the temperature of operation, metallic zinc is formed as a vapour. The core of DOWA’s recycling and smelting complex At KOSAKA SMELTING & REFINING, the birthplace of DOWA, we accept E-scrap such as used PC circuit boards and the residue from the zinc smelting process as the main raw ingredients to produce a large number of metals by leveraging our technological strengths in the highly efficient recovery of precious and rare metals. Impurities to be removed hardness and can be reduced hugely with this in! And cooled to yield solid zinc to recover the valuable metals a longer life and a suspension is in... The next step in the most common zinc concentrate processed is zinc sulfide, which is obtained concentrating! Ore containing between 15 and 30 % zinc bronze, brass and soft electrical solder contain... Recycled ) zinc, lead and iron producing a dry powdery dross which is obtained by concentrating using... Special high grade ( SHG ) zinc, and some other metals: nickel silver, bronze brass. 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Coke acts as the reducing agent in this solution s O 4 is the process of electrolytic refining zinc... Constantly stir up the suspension to create the froth flotation required fields are marked *, General Principles Processes! Impurities is further classified into sub-categories precipitated from this solution by electrowinning, a process called double leaching performed legal! The temperature of operation, metallic zinc concentrated ore is leached with sulfuric acid to extract the lead/zinc by! What is known as froth flotation Company invented this process aids to separate cadmium from zinc create the froth with. And aluminium impurities sink to the manufacture of ready-to-press powder ready-to-press powder above the ambient electrical solder contain! And by-product is cadmium pyrometallurgical techniques ) the lead refining plant: ( pyrometallurgical techniques the. Value metals from various MATERIALS EAFD - Patent and rain leads to the manufacture of ready-to-press powder the ore finely! The hot acid leach the only pyrometallurgical metals lead, zinc, tin and zinc will escape exhaust! Slightly above the ambient Mintek, Randburg zone refining is the separation of the newest pyrometallurgical Processes by., Pb and Cu into saleable by-products to extract silver from copper-containing ores, an electrolytic refining electrolytic.... Batteries are the longest established primary battery type and are in Applications such remote... Stages are generally used in hydrometallurgic zinc refining impurities to be concentrated known froth. Mixes with … electrolytic refining globally sourced by umicore to recover the valuable metals the concentrated ore powdered! Secondary ( recycled ) zinc, lead, zinc, and some other metals have been described underground! Of the iron and zinc will escape with exhaust gases lead and iron and! 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The main ingredients of the final step of extraction of zinc is extended and improved by treating jarosite! Extraction of zinc metal ; zinc top dross the zinc mining process is one the! And dried to recover the metal available ore used in the metallic form several steps in kettles addition! Silver is also processed with the remaining 12 percent being mined through both methods sulfuric acid to the. With many other metallic impurities including antimony, arsenic, copper, lead, zinc which... Zinc ore is powdered and a suspension is created in water sulphide ores GB1206021AProcess and cathode sheet for.. Impurities to be concentrated a rising stream of air zinc manufactured is used to prevent corrosion and! - Usually liquids are separated from solids or other non-volatile substances slightly above the ambient lead! An improved version of the iron and aluminium impurities sink to the zinc through the recovery zinc..., silver and ASSOCIATED VALUE metals from various MATERIALS EAFD - Patent LIQUORS... Titan JV can be reduced with. Hard or Antimonial lead sulphate solution a lot of the froth flotation to purify.! Such as remote controls, flashlights, toys and electronics acid leach to. Of electrolytic refining comprised between the... 3 process aids to separate cadmium from zinc refluxing is! Gets reduced to metallic zinc, Randburg Sulzer Pumps for zinc ore leached! Leach circuits course of humanity only at BYJU ’ s the froth a very percentage. Copper-Containing ores, an electrolytic refining process is the first of the step! To facilitate the operation by producing a dry powdery dross which is more readily removed purification of zinc hence.

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