Comparative study of electroreduction of iron oxide using …
On the other hand, prior studies have also demonstrated successful electrodeposition of iron at low temperatures in acidic environments, for instance, sulfate system [15, 37] and chlorine system [12, 39]. Acidic bath solutions containing iron/ferrous salt, such as ferrous chloride (FeCl 2) and ferrous sulfate (FeSO 4) were used in those …
Indium electrowinning study from sulfate aqueous solution …
Indium electrowinning using sulfate solution on different metal cathode. ... Galvanostatic recovery, using HNO 3 wastewater baths with an aluminum/cast-iron electrode, a 64 A/m 2 current density, pH lower than 6.1 and 25 °C temperature, to obtain around 90 % of CE and low SEC of about 0.5 kW h/kg, ...
Influence of ammonium salt on electrowinning of copper …
Among these three systems, the chloride system showed the lowest power consumption of 500 kWh t −1 at the current density of 200 A m −2, which is about 25% of the conventional copper electrowinning process from …
Effect of nickel and magnesium on zinc electrowinning using sulfate
The addition of nickel to the zinc and magnesium solutions decreased the nucleation loop, facilitating zinc deposition. Effect of magnesium addition (5, 10 and 15 g.L -1 ) on the cyclic ...
Chapter 12 Electrometallurgy
In electrowinning from aqueous solutions, the cathodes are usually in the form of ... an iron pot lined with carbon, which acts as cathode, is used. In electrolytic production of magnesium, steel cathodes [17] are used because magnesium does not alloy with iron. 12.1 Principle ... in the electrolysis of aqueous copper sulfate solution, there ...
Electrowinning of cobalt from sulphate solutions
The effect of solution pH and applied magnetic field on the electrodeposition of thin single-crystal films of cobalt. Electrodeposition of cobalt from a cobalt sulphate bath on to {001} and {110} copper single crystal surfaces has been carried out for a range of solution pH (1.5 to 4.0). Electron diffraction….
Indium electrowinning study from sulfate aqueous solution …
Indium electrowinning process from sulfate solution on copper, titanium and aluminum cathodes (Cu, Ti and Al) were studied using the methods of cyclic voltammetry (CV) and chronoamperometry (CA).
Effects of additives on nickel electrowinning from sulfate …
Effects of additives on nickel electrowinning from sulfate system LU Jing ( 6 M-), YANG Qi-hua (L "), ZHANG Zhao ( ) School of Chemical Engineering, Sichuan University, Chengdu 610065, China Received 6 July 2009; accepted 30 December 2009 Abstract: In order to eliminate the pitting and improve the surface morphology of cathode …
Effect of sodium lauryl sulphate (SLS) on nickel electrowinning …
High purity nickel was produced by electrowinning from sulphate and chloride solutions in the presence of high concentration of boric acid as a buffer (Lupi et al., 2006). Borikar et al., 2006 electrowon nickel from an ammoniacal sulphate bath and studied the effect of acetone on the current efficiency, morphology and particle size of the …
The Effect of Temperature on the Electrowinning of …
The direct electrowinning of copper from synthetic and actual sulfuric acid leach solutions containing iron by utilizing a mixture of sulfur dioxide and air as a sparging gas has been carried out ...
Electrowinning of Iron in Aqueous Alkaline Solution …
Dpt. of Materials Technology, Norwegian University of Science and Technology, Trondheim, Norway. [email protected]. In order to develop a new, efficient industrial process for producing ...
Electrowinning of Iron from Spent Leaching …
Finally, it was shown that below 5 g/L Fe, side reactions at the cathode resulted in a decrease in process efficiency, while 40 g/L yielded the highest efficiency …
Why electrowinning hates iron
Electrowinning is a process used to recover metals from a solution or an electrolyte, by means of an electrolytic chemical reaction. This occurs when an electric current passes from a cathode that's negatively charged to a positively charged anode through a metal-containing solution. During this process, the electrons reduce the metal …
Modified zinc sulphate solution purification technique to …
The first stage is the neutral leaching step followed by iron purification where co-precipitation of several deleterious impurities such as antimony, arsenic, germanium etc. occur along with the precipitation of iron as iron hydroxide. ... Mechanism of removal of cobalt from zinc sulphate solution for electrowinning, Today's Technology for the ...
Thermodynamic Modeling of Iron-Copper-Sulfuric Acid Solutions …
Solvent extraction and electrowinning (SX/EW) play an important role during the hydrometallurgical production of copper for low-grade ores. To better understand the rapid Cu extraction/strip kinetics for producing a high-purity CuSO 4 –H 2 SO 4 electrolyte and elucidate the method to maximize current efficiency by preventing leach …
Effect of iron on zinc electrowinning usng sulfate …
Linear sweep curves that represent the onset of cathodic deposition and redissolution of deposited zinc are shown for the acid solution without iron addition and …
(PDF) EFFECT OF IRON ON ENERGY CONSUMPTION AND CURRENT EFFICIENCY …
Current efficiency and energy consumption of zinc electrowinning from zinc sulfate solution Zinc sulfate Cell voltage Electrodeposited Theoretical Current Energy zinc mass efficiency consumption electrolyte (mVAg/AgCl) zinc mass (kWh/T) (%) (mg) (mg) Without Fe 2069 ± 3 182.4 ± 1.4 183 99.6 1744 Addition of 5 mg/L of Fe 2038 ± 4 182.1 ± 0.8 ...
Molten Salt Electrowinning of Metals and Materials
Electrowinning is a demonstrated approach to obtain metals by the passage of electrical charge into a molten solution containing the metal ion. Several classes of metals such as alkali, alkaline earth, refractory, rare earths and actinides cannot be produced in metallic form by electrolysis of their aqueous solutions due to the limited ...
Electrowinning of Nickel and Cobalt from Non-circulated Sulfate …
Using synthetic solution obviates disturbing ions elimination from the electrolyte in addition to providing more accurate results. In this study, nickel and cobalt electrowinning from the uncirculated sulfate-based electrolyte in the presence of boric acid was studied to track current efficiency and specific energy consumption changes in …
Zinc electrowinning from acidic sulphate solutions Part IV
The effects of perfluorobutyric acid, perfluoroheptanoic acid and perfluorooctanoic acid, in the presence and absence of antimony(III), on the cathodic current efficiency, power consumption and polarisation behaviour of the cathode during the electrowinning of zinc from acidic sulphate solutions were investigated.
Electrowinning of iron from sulphate solutions | Health
The present paper describes pilot plant operation of the crucial step of this process, which is electrowinning of iron from a sulphuric acid solution, using iron starting sheets and lead anodes surrounded by a diaphragm. High purity iron was produced, with a current yield of 85% and a power consumption of 4.25 kWh/kg iron.
Electrowinning of iron from sulphate solutions
Electrowinning of iron from sulphate solutions. February 2008. Hydrometallurgy 90 (2-4):213-220. DOI: 10.1016/j.hydromet.2007.07.014. Authors: E. …
Flexible solar-to-iron system: a new concept and its …
As shown in Figure 2, electrolytic iron sulfate process is proposed on the basis of the following considerations: (1) the reaction conditions are mild, generally at 50–80 ℃ in sulfuric acid system.(2) The electrolytic iron sulfate process is similar to the existing industrialized electrowinning metals, such as zinc, copper, manganese, nickel, and so on.
Electrowinning of cobalt from sulphate solutions contaminated …
The electrowinning (EW) of cobalt from sulphate solution contaminated with organic impurities: tri-n-butyl phosphate (TBP), 2-hexylmethyl decanoic acid (VERSATIC 10), 2-hydroxy-5-nonyl acetophenone oxime (LIX 84), di-2-ethylhexyl phosphoric acid (D2EHPA) and di-2,4,4-trimethylpentyl phosphinic acid (CYANEX 272) …
Metal Recovery Processes | SpringerLink
Water containing dissolved ions is a common electrolyte. Commercial electrowinning in aqueous solutions often involves acid. The hydrogen ions in the acid as well as the counter ions (usually sulfate) provide most of the solution conductivity. The rate of electrowinning is determined by electrochemical kinetics as discussed in Chap. 4.
Effects of cobalt, temperature and certain impurities upon …
The effects of cobalt concentration, temperature and the presence of zinc, copper and iron ions in the electrolyte on current efficiency and cathodic quality were investigated by cyclic voltammetry and galvanostatic methods during cobalt electrowinning. The results showed that high cathodic efficiency of cobalt deposition was obtained from solutions containing …
Electrowinning of iron from sulphate solutions
The present paper describes pilot plant operation of the crucial step of this process, which is electrowinning of iron from a sulphuric acid solution, using iron starting sheets and lead anodes surrounded by a diaphragm. High purity iron was …
Electrowinning of Iron in Aqueous Alkaline Solution Using …
DOI: 10.1149/1.3039998 Corpus ID: 93817920; Electrowinning of Iron in Aqueous Alkaline Solution Using a Rotating Cathode @article{Yuan2009ElectrowinningOI, title={Electrowinning of Iron in Aqueous Alkaline Solution Using a Rotating Cathode}, author={Boyan Yuan and Ole Edvard Kongstein and Geir Martin Haarberg}, …
Electrowinning of Iron from Spent Leaching …
electrowinning; anion exchange membranes; waste treatment; iron sulphate disposal; acid regeneration. 1. Introduction. A South African mining group is …
Flexible solar-to-iron system: a new concept and its …
The flexible electrochemical ironmaking system produces iron in the sunshine when there is renewable electricity and is also able to standby in the dark. The …