New Technology for Electrorefining of Copper

Filzwieser, Andreas; Filzwieser, Iris; Konetschnik, Stefan

doi:10.1007/s11837-012-0459-1

Cited by 16 publications

(5 citation statements)

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“…The feasible approach for resolving this contradiction is to raise the limiting current density. According to physical and chemical laws (Equation 1), the limiting current density is bound up with mass transport of Cu 2+ [9] and the limiting current density is inversely related to the diffusion boundary layer. Therefore, the limiting current density may be raised obviously by decreasing diffusion boundary layer thickness, which could be achieved by electrolyte agitation [10] , rotation of cathode [11] and enhanced flow at cathode [7,12] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Flow Pattern on Energy Consumption and Properties of Copper Powder in the Electrolytic Process

Xia

Xiang

Yang

et al. 2018

SSP

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Because of distinctive properties, such as dendritic structure, high green strength, and low oxygen content, electrolytic copper powder has been widely used in aviation, aerospace, national defense industry and other domains. But at present, energy consumption of the electrolysis process in copper powder production is high, and the current efficiency is only about 90%. Therefore,the decrease in energy consumption of the electrolysis process has become the major bottlenecks in the development of the enterprises. In this paper, a new electrolysis cell with different electrolyte inlet arranged on the cell was manufactured. Then, the effect of flow pattern of electrolyte on the current efficiency, energy consumption and properties of copper powder was investigated. The experimental results showed that the electrolytic process had the higher current efficiency, lower energy consumption and smaller copper powders when the flow rate is 0.5l/min in the paralleled inlet and 1.5 l/min in the traditional inlet. Under the optimal conditions, the current efficiency, energy consumption and copper powder size were 99.10%, 712.90kw∙h/t and 47.80um respectively. This means an obvious rise in current efficiency and decrease in energy consumption compared to traditional feeding method.

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Section: Introductionmentioning

confidence: 99%

Effect of Flow Pattern on Energy Consumption and Properties of Copper Powder in the Electrolytic Process

Xia

Xiang

Yang

et al. 2018

SSP

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“…This cell has three different inlet/outlet configurations: With its inlet on the side wall near the cell top and its outlet on the opposite side wall near the cell bottom [4], its inlet at the cell top and its outlet near the cell bottom [5], and direct side inflow from inlets on the side wall [6]. In 2005, the METTOP-BRX-Technology was developed by Mettop GmbH (Austria) for copper electrorefining [7,8]. This technology utilizes a manifold inlet to achieve a parallel electrolyte flow and to introduce the fresh electrolyte directly to the cathode surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of Jet Flow between Electrodes on the Cathode Quality in Copper Electrorefining with High Current Density

Wang

Xia

et al. 2018

Metals

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Increasing current density is one of the main methods for improving the productivity of copper electrorefining. However, in the conventional bottom-inlet/top-outlet mode, an increase in current density leads to a deterioration of the surface quality of the cathode copper. This paper describes an experimental study of the influence of the jet flow between electrodes on the cathode quality. The surface roughness and the standard deviation of the cathode copper were used to evaluate the cathode quality. The results showed that in the single-side jet inlet mode, the electrolyte circulation rate has great influence on the surface roughness of the cathode copper, which is inversely correlated. However, when the electrolyte circulation rate is small, the surface roughness of the cathode copper is not uniform. The farther the position at the surface of the cathode copper is to the jet region, the coarser the cathode copper surface, and vice versa.

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“…Several innovative electrolytic cells have been developed, with Mettop and DBSA cells as the representatives. 20,21 They are featured with inlets and outlets at side positions. Therefore, electrolyte from the inlet flows directly into the inter-electrode domain, which exerts strong convection, brings about uniform distribution of copper ions, and effectively reduces the diffusion boundary layer thickness.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Electrolyte Flow and Slime Particle Transport in a Newly Designed Copper Electrolytic Cell and a Laboratory-Scale Conventional Electrolytic Cell

Zeng

Wang

Free

2016

JOM

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An innovative copper electrolytic cell was designed with its inlet at the cell top and its outlet near the cell bottom, in opposite to conventional electrolytic cells. It was modeled in COMSOL Multiphysics to simulate copper electrorefining process. Unlike conventional electrorefining cells, downward electrolyte flows are more dominant in the fluid flow field in this cell, which leads to faster settlement of slime particles and less contamination to the cathode. Copper concentration profiles, electrolyte flow velocity field, slime particle movements, and slime particle distributions were obtained as simulation results, which were compared with those in a laboratory-scale conventional electrolytic cell. Advantages of the newly designed electrolytic cell were found: copper ions are distributed more uniformly in the cell with a thinner diffusion layer near the cathode; stronger convection exists in the inter-electrode domain with dominant downward flows; and slime particles have larger possibilities to settle down and are less likely to reach the cathode.

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New Technology for Electrorefining of Copper

Cited by 16 publications

References 0 publications

Effect of Flow Pattern on Energy Consumption and Properties of Copper Powder in the Electrolytic Process

Effect of Flow Pattern on Energy Consumption and Properties of Copper Powder in the Electrolytic Process

Effect of Jet Flow between Electrodes on the Cathode Quality in Copper Electrorefining with High Current Density

A Comparative Study of Electrolyte Flow and Slime Particle Transport in a Newly Designed Copper Electrolytic Cell and a Laboratory-Scale Conventional Electrolytic Cell

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