Reducing the energy consumption and cell sludge of the zinc electrowinning process by using a pyramid-shaped 3D-Pb anode

2019 ◽  
Vol 190 ◽  
pp. 105188 ◽  
Author(s):  
Xiaocong Zhong ◽  
Fanghui Chen ◽  
Huaping Nie ◽  
Ruixiang Wang ◽  
Zhifeng Xu
Keyword(s):  
Energy Consumption ◽  
Zinc Electrowinning

EFFECT OF IRON ON ENERGY CONSUMPTION AND CURRENT EFFICIENCY OF ZINC ELECTROWINNING FROM SULFATE SOLUTIONS

2010 ◽  
Vol 7 (1-2) ◽  
pp. 61-66 ◽  
Author(s):  
Vanessa de Freitas Cunha Lins ◽  
Renata Abelha ◽  
Maria das Mercês Reis de Castro ◽  
Marina Maciel Dias de Souza ◽  
Leticia Lanza de Moraes ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Current Efficiency ◽  
Zinc Electrowinning ◽  
Sulfate Solutions

scholarly journals A Study on the Application Characteristics of the Insoluble MMO (Mixed Metal Oxide) Electrode for Energy Reduction of Zinc Electrowinning Process

2020 ◽  
Vol 42 (9) ◽  
pp. 424-430
Author(s):  
Mijung Park ◽  
Taeksoon Lee
Keyword(s):  
Energy Consumption ◽  
Metal Oxide ◽  
Energy Use ◽  
Deposition Efficiency ◽  
High Energy ◽  
Alloy Electrode ◽  
Mixed Metal Oxide ◽  
Zinc Electrowinning ◽  
Oxide Electrode ◽  
Zinc Deposition

Objective : The zinc electrowinning industry is one of the high energy consumption industries where energy saving is required. In the zinc electrowining process, electrode is a high energy consuming part. In order to reduce energy use in the electrolytic smelting industry, a comparative study was conducted on the current usage of Pb+Ag alloy electrode and insoluble composite metal oxide (MMO) electrode.Methods : In this study, a comparative evaluation of energy consumption was conducted between the generally used Pb+Ag alloy electrode and an insoluble MMO electrode. Aluminum was used as a reducing electrode. The actual on-site zinc electrowinning solution and ZnSO₄ simulated solution were prepared to estimate the electrode potential, voltage, zinc deposition efficiency, and lifetime characteristics under the current density of 500 A/m².Results and Discussion : The overvoltage of the insoluble MMO electrode was 28.9% lower and the voltage was 15.0% lower than that of Pb+Ag alloy electrode. The zinc deposition efficiency of the insoluble MMO electrode was higher 1.9% in the actual on-site zinc electrowinning solution and 6.3% in the simulated solution. Compared with the Pb+Ag alloy electrode in use, the insoluble composite metal oxide electrode exhibited low overvoltage, good voltage characteristics, and high current efficiency characteristics.Conclusions : When the energy consumption of the Pb+Ag alloy and the insoluble MMO electrodes was compared, The insoluble MMO electrode showed 17.0% lower energy consumption in the actual on-site zinc electrowinning solution and 23.8% lower in the ZnSO₄ simulated solution than Pb+Ag alloy electrode.

Lowering the Energy Consumption of Zinc Electrowinning By Electrocatalysis of the Oxygen Evolution Reaction Using Manganese Oxides

2020 ◽  
Vol MA2020-02 (19) ◽  
pp. 1563-1563
Author(s):  
Sheida Arfania ◽  
Yu Pei ◽  
Pooya Hosseini-Benhangi ◽  
Edouard Asselin ◽  
Előd L. Gyenge
Keyword(s):  
Energy Consumption ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Manganese Oxides ◽  
Zinc Electrowinning

The Influence of Anode Composition on Energy Consumption and Current Efficiency in Zinc Electrowinning

2017 ◽  
Vol 164 (7) ◽  
pp. E166-E172 ◽  
Author(s):  
Somayeh Dashti ◽  
Fereshteh Rashchi ◽  
Massoud Emamy ◽  
Ehsan Vahidi
Keyword(s):  
Energy Consumption ◽  
Current Efficiency ◽  
Zinc Electrowinning

An Experimental Investigation of Alkaline Zinc Electrowinning Using Magnesium Alloy as Cathode

2010 ◽  
Vol 113-116 ◽  
pp. 2208-2211 ◽  
Author(s):  
Jia Chao Jiang ◽  
Cheng Long Zhang ◽  
You Cai Zhao
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Energy Consumption ◽  
Magnesium Alloy ◽  
Specific Energy ◽  
Practice Effects ◽  
Alkaline Electrolyte ◽  
Zinc Electrowinning ◽  
The Novel ◽  
Industrial Practice

This paper presents an experimental investigation of the novel alkaline zinc electrowinning process by using magnesium alloy as cathode and stainless steel as anode. The alkaline electrolyte with 40 g/L Zn2+ and 200 g/L NaOH was selected to be in accordance with the industrial practice. Effects of several electrolysis variables, i.e. current density (500, 1000, 1500 A/m2), temperature (30, 50, 70 °C) and impurities (lead and tin) on the morphology of deposited zinc were investigated. The current efficiency was always 100% and the deposited zinc always in powdery form. Specific energy was low, even at 1000 A/m2, and decreased with rising temperature, being only 2.27 kWh/kg Zn at 50 °C, which was much lower than the energy consumption of 3.3-3.4 kWh/kg Zn in the conventional acidic electrowinning.

Lowering the Energy Consumption of Zinc Electrowinning By Electrocatalysis of Oxygen Evolution Reaction Using Manganese Oxides

2020 ◽  
Vol MA2020-01 (21) ◽  
pp. 1258-1258
Author(s):  
Sheida Arfania ◽  
Yu Pei ◽  
Pooya Hosseini Benhangi ◽  
Edouard Asselin ◽  
Elod Gyenge
Keyword(s):  
Energy Consumption ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Manganese Oxides ◽  
Zinc Electrowinning

scholarly journals Adsorption Capacity of Organic Compounds Using Activated Carbons in Zinc Electrowinning

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2169 ◽  
Author(s):  
Jung Eun Park ◽  
Eun Ju Kim ◽  
Mi-Jung Park ◽  
Eun Sil Lee
Keyword(s):  
Energy Consumption ◽  
Adsorption Capacity ◽  
Removal Efficiency ◽  
Contact Time ◽  
Feeding Rate ◽  
Activated Carbons ◽  
Zinc Electrowinning ◽  
Recovery Efficiency ◽  
Zinc Recovery ◽  
Liquid Pump

The influence of adsorbate (D2EPHA and kerosene) on the process of zinc electrowinning from sulfuric acid electrolytes was analyzed. The main objective was to critically compare three factors: (1) Three types of activated carbon (AC); (2) adsorption temperatures and contact time; and (3) zinc recovery efficiency. The results showed that organic components reduced the efficiency of zinc recovery. Moreover, wood-based ACs had a higher adsorption capacity than coal- and coconut-based ACs. To maintain a removal efficiency of 99% or more, wood-based ACs should constitute at least 60% of the adsorbate. The temperature of adsorption did not affect the removal efficiency. Additionally, the feeding rate of adsorbate in the solvent was inversely proportional to the removal efficiency. A feeding rate of the liquid pump of over 3 mL/min rapidly increased the delta pressure. For the same contact time, 99% of adsorbate removal occurred at 1 mL/min compared to approximately 97% at 0.5 mL/min. In the presence of 100 mg/L zinc, with increasing adsorbate from 0–5%, the recovery efficiency of zinc decreased from 100% to 0% and the energy consumption increased from 0.0017–0.003 kwh/kg zinc. Considering the energy consumption and zinc deposit mass, 0.1% of the adsorbate is recommended for zinc electrowinning.

Lay Perceptions of Energy Consumption

2009 ◽  
Author(s):  
Shahzeen Z. Attari ◽  
Michael L. DeKay ◽  
Cliff I. Davidson ◽  
Wandi Bruine de Bruin
Keyword(s):  
Energy Consumption ◽  
Lay Perceptions
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