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direct electrorefining of secondary lead slag anode particles

Tellurium, from Copper Anode Slime to High Purity Product: A Review ...

Oct 6, 2020Elements such as Ni, As, Sb, Te, Se, and Ag are partially soluble in the electrolyte; therefore, they can be found in both the slime and the electrolyte. [ 23] Some of the slime constituents are chemically altered during the electrorefining process, while some others remain unchanged.

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Study of Tin Electrodeposition with Anion Exchange Membrane in Chloride ...

A three-dimensional cell with a size of 0.12 × 0.090 × 0.064 m was designed for the novel tin electrodeposition process, which is presented in Figure 1. The cell has an anode with a size of 0.065 × 0.0515 × 0.004 m at 0.060 m distant from a corresponding cathode with a size of 0.070 × 0.054 × 0.001 m.

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Electrochemical recovery of tellurium from metallurgical industrial ...

The slag produced in the Doré process typically includes B, Fe, Ba, Pb, Na and Si, which originates from the added slag formers, whereas Bi, Cu, Se, Te, PM (precious metals) and PGM (platinum group metals) that result from anode slimes are also often found at minor concentrations.

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Regulation (EC) No 1013/2006 of the European Parliament and of the ...

2. This Annex consists of three parts, Parts 2 and 3 of which apply only when Part 1 is not applicable. Consequently, to determine whether a specific waste is listed in this Annex, an initial check must be made to ascertain whether the waste is listed in Part 1 of this Annex, and, if it does not, whether it is listed in Part 2, and, if it does not, whether it is listed in Part 3.

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Rodolfo Marín Rivera - Marie Curie Fellow - Postdoc - LinkedIn

The recovery of rare-earth elements from an alumina and silica rich slag produced during the smelting reduction process of bauxite residue was studied. The slag was leached with sulfuric acid at different concentrations (1-3 N H2SO4) in a titanium autoclave at a liquid-to-solid ratio of 10:1 and different temperatures (100-180 °C).

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MATERIALS TRANSACTIONS | Steel Science Portal

The phase formation of ferromagnetic L1 0-MnAl (τ-phase) was accelerated by annealing in magnetic field.With in-field annealing at 623 K, the magnetization of the τ-phase annealed at 15 T was a maximum of 72.2 A･m 2 /kg at 1.5 T, which is over 4 times larger than that annealed without an external magnetic field for the same annealing time. On the other hand, the transformation from τ ...

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Effect Of Ti Powder Addition On The Fabrication Of TiO2 Nanopowders ...

Morphology Change Of Si Deposit In Molten Salt Electrorefining; Effect Of The Desorption-Recombination Temperature On The Microstructure And Magnetic Properties Of HDDR Processed Nd-Fe-B Powders; Aluminum Oxide Formation On Fecral Catalyst Support By Electro-Chemical Coating; High Purity Tungsten Spherical Particle Preparation From WC-Co Spent ...

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Overview of foreign nonferrous smelter technology - US EPA

Preheated air has not previously been used in this manner in secondary lead production. Special covers are fitted over the tuyeres to minimize fugitive emissions during punching. Four hooded slag taps and one hooded lead well are located at the bottom of the furnace. The lead is cast into 1-Mg ingots in pneumatic equipment.

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Ionic liquid electrochemical processing of reactive metals

Ionic liquids (ILs) were studied as solvents for electrochemical reactions with the intent to devise metallurgical processes for Al, Mg and Ti that are less energy intensive and operate at lower temperatures than current industrial practice. Tetra-alkyl phosphonium ILs are on the low end of the IL cost spectrum and are regarded as understudied compared with imidazolium and pyridinium ILs. They ...

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Copper_extraction_techniques : definition of Copper_extraction ...

Apparatus for electrolytic refining of copper The copper is refined by electrolysis. The anodes cast from processed blister copper are placed into an aqueous solution of 3-4% copper sulfate and 10-16% sulfuric acid. Cathodes are thin rolled sheets of highly pure copper. A potential of only 0.2-0.4 volts is required for the process to commence.

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IKCEST

Research and Industrial Application of a Process for Direct Reduction of Molten High-Lead Smelting Slag; Synchrotron-Based X-ray Microtomography Characterization of the Effect of Processing Variables on Porosity Formation in Laser Power-Bed Additive Manufacturing of Ti-6Al-4V

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Metallurgische Prozesstechnik und Metallrecycling / RWTH Aachen

Utilization of Sodium Rich Lead Acid Battery Slag as Alkaline Activator for Blast Furnace Slag ... Characteristics of anode slime obtained from secondary copper anodes with high Ni content ... Effect of As, Sb, Bi and oxygen in copper anodes during electrorefining Copper 2010, 06.06. - 10.06.2010 Hamburg, Deutschland, Vol. 4 Electrowinning ...

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RECYCLING METALS FOR THE ENVIRONMENT - Columbia University

During smelting, metallic lead containing less than 0.01% antimony settles in the bottom and is periodically tapped out of the furnace. When the upper slag layer in the reactor reaches a certain depth, the slag is reduced from 40-60% lead and 5-6% antimony, to 2-4% lead and less than 1% antimony by continuous injection in the presence of coal.

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MICHAEL L FREE - Research - Faculty Profile - University of Utah

This area of research is often generally referred to as chemical metallurgy or more specifically as a combination of electrometallurgy and hydrometallurgy. Consequently, most of my research has involved electrodeposition and corrosion as well as metal and metal compound reaction chemistry. Research Keywords Photovoltaics Hydrometallurgy

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(PDF) Extractive Metallurgy 3 Processing Operations and Routes Alain ...

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Electrolysis data of the effect of current density on electrorefining ...

The electrical properties of lead (Pb) nanopowder (metal) produced by "Direct Electrorefining" technique of secondary lead slag are investigated in this study. The morphology and shape of the...

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Electrical Properties of Electrorefined Nanostructured Lead (Pb) for ...

The electrical properties of lead (Pb) nanopowder (metal) produced by "Direct Electrorefining" technique of secondary lead slag are investigated in this study. The morphology and shape of the nanostructure lead powder were examined using a scanning electron microscope (SEM). The particles size is confirmed using a transmission electron microscope (TEM).

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WO2015123502A1 - Electrorefining of magnesium from scrap metal aluminum ...

The invention comprises methods and apparatuses for the electrorefining of Mg from Al or Mg alloy scrap. The invention utilizes the density and charge features of Mg present in a melted alloy to continuously extract Mg and Mg alloys from a melted Al alloy feed.

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Gold Smelting & Refining Process - Mineral Processing & Metallurgy

The problem has two causes; first, flouring or tiny mechanical reduction of size during grinding. The second cause is due to chemical reactions that forms coatings or layers of some impurities. These coatings can be oxides, sulphides, or sulphates of some base metals that present in the ore.

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Improvement In Copper Electrorefining - Patent

Disclosed is a process for copper production comprising the electrorefining of copper in an electrolytic cell, wherein • the voltage difference over the cell is maintained at less than 1.6 volt, • the anode comprises at most 98.0%wt of copper and less than 1.00%wt of iron, • the current density through the cell is at least 180 A/m² of cathode surface, • electrolyte is removed from the ...

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Aluminum Remelting and Casthouse Strategies - Light Metal Age Magazine

The aluminum casthouse is where aluminum wrought processing and shape casting begins, and there are many casthouse functions to consider. Scrap sorting, decoating of organic coatings on scrap, remelting, alloying, melt purification by refining and degassing, grain refining, melt transfer to casting station, casting by direct chill or other means, ingot heat treatment, and dross processing are ...

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The Blue Mine EarthCache - Geocaching

In this process, a direct electric current is set up between positive and negative electrodes placed in the solution. The negative electrodes, called cathodes, are usually made of thin sheets of pure copper and the positive electrodes, called anodes, are usually made of lead.

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Extraction of Metals: March 2013 - Blogger

The first step in this process is breaking down large chunks of rock into smaller pieces. At a mill, large machines known as crushers reduce the ore to pieces no larger than road gravel. The gravel-like material then enters rotating drums filled with steel balls. In these drums, the ore is ground to a fine slurry or powder.

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Electrochemical Production of Bismuth in the KCl-PbCl2 Melt

Aug 25, 2021An anode dissolution of binary metallic lead-bismuth alloys with different concentrations of components has been studied in the KCl-PbCl2 molten eutectic. The dissolution of lead is found to be a basic process for the alloys of Pb-Bi (59.3-40.7), Pb-Bi (32.5-67.5), Pb-Bi (7.0-93.0) compositions in the whole interval of studied anode current densities.

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Characterization of dusts from secondary copper production

% Sb, 11.5 % As). As a result, direct recycle of the roaster and smelter dusts is more feasible, and the incentive to treat converter and slag cleaning dusts to remove impurities is higher [5, 6]. The production of copper from secondary raw materials is a physicochemical process occurring at high temperatures and involving melt, slag, gas phase ...

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Electrochemical Production of Bismuth in the KCl-PbCl2 Melt

The electrochemical reaction of lead ions reduction is reversible according to the two-valence scheme; the diffusion coefficient, calculated according to Sanda's equation, is equal to D Pb (II) = 2.26 × l0 −5 cm 2 /s for 873 K.

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Ore Dressing and fire assaying Flashcards | Quizlet

ORE DRESSING METALLURGY 010: The process of electrochemically dissolving copper from impure anodes and selectively plating the dissolved copper in pure form. electrolyte ORE DRESSING METALLURGY 011: It contains 40-50 kg/m3 of Cu, 180-200 kg/m3 of H2SO4, brightening and smoothing agents.

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US Patent Application for IMPROVEMENT IN COPPER ELECTROREFINING Patent ...

A process for copper production comprising electrorefining of copper in an electrolytic cell, wherein the voltage difference over the cell is maintained at less than 1.6 volt, the anode comprises at most 98.0% wt of copper and less than 1.00% wt of iron, the current density through the cell is at least 180 A/m2 of cathode surface, electrolyte is removed from the cell during the operation at an ...

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Assessment Of Industrial Hazardous Waste Practices In The Metal ...

The principal unit smelting operations are (1) double-pass sintering to remove sulfur and simultaneously agglomerate fine-sized feed materials: (2) blast furnace smelting of sinter with coke and fluxes to make a lead bullion containing most of the byproduct metal values, and a slag contain- ing most of the zinc and worthless gangue material; (3 ...

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Copper_extraction_techniques : definition of Copper_extraction ...

Definitions of Copper_extraction_techniques, synonyms, antonyms, derivatives of Copper_extraction_techniques, analogical dictionary of Copper_extraction_techniques (English)

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archana agrawal - Academia.edu

Recent Trends and Current Practices for Secondary Processing of Zinc and Lead. ... evaporation-crystallization, electrolytic process, and direct hydrogen reduction. Physical and chemical properties of copper. Publication Date: 2009 ... generated during the electrorefining of anode copper contains 40 g/L Cu, 10 20 g/L Ni, and 170 200 g/LH 2 SO ...

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Journal of the Mining and Metallurgical Institute of Japan - J-STAGE

The main features are the above-mentioned electrothermic slag-fuming process which includes direct recovery of zinc metal from slag, complete recovering of sulfur dioxide gas from the sintering plant, a zinc leach residue treatment and a fully mechanized electrolytic lead refining system utilizing large cells with eight workers.

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Refining primary lead by granulation-leaching-electrowinning - ResearchGate

Crude lead is mainly produced by the smelting of lead concentrates in sinterblast furnaces and by direct smelting-reduction processes (Kong et al., 2014a,b;Sohn and Olivas-Martinez, 2014). Lead...

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Direct Electrolytic Refining of Lead Acid Battery Sludge

The direct electrorefining of anode particles obtained from lead acid battery sludge to produce electrolytic lead powder without application of the conventional leaching process is the aim of this...

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Direct Electrolytic Refining of Lead Acid Battery Sludge

The direct electrorefining of anode particles obtained from lead acid battery sludge to produce electrolytic lead powder without application of the conventional leaching process is the aim of this work. To create this target, exhausted lead acid batteries were crushed to smaller particles and separated from the internal and external plastic covers and fed into a titanium nets basket which acts ...

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Preliminary Presentation List by CIM-ICM Publications -

Characterization and Electrorefining of a Copper Anode with High Lead, Arsenic and Bismuth Charles M. Campbell, Missouri University of Science and Technology Michael S. Moats, Missouri University ...

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WO2019219821A1 - Improvement in copper electrorefining - Google Patents

Disclosed is a process for copper production comprising the electrorefining of copper in an electrolytic cell, wherein • the voltage difference over the cell is maintained at less than 1.6 volt, • the anode comprises at most 98.0%wt of copper and less than 1.00%wt of iron, • the current density through the cell is at least 180 A/m² of cathode surface, • electrolyte is removed from the ...

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Mari Lundström | Aalto University

Modelling the physico-chemical effect of silver electrorefining as effect of temperature, free acid, silver, copper and lead concentrations. Arif T. Aji, Taina Kalliomäki, Benjamin P. Wilson, Jari Aromaa, Mari Lundström 2017 Proceedings of the 1st International Process Metallurgy Conference, IPMC 2016.

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Mari Lundström | Aalto-universitetet

A direct synthesis of platinum/nickel co-catalysts on titanium dioxide nanotube surface from hydrometallurgical-type process streams ... Pressure leaching of decopperized copper electrorefining anode slimes in strong acid solution. Sipi Seisko, Jari ... copper and lead concentrations on silver electrorefining electrolyte conductivity. Arif T ...

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Antimony Recovery from End-of-Life Products and Industrial Process ...

Luo et al. [ 20] studied the recovery of gold and antimony from antimony smelting slag by direct reduction in an electric furnace. Using this method, the antimony content in the slag was reduced from 32 to <1 wt%.

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