Effect of Cyclical Flow Velocity on Magnetized Copper Electrolysis Process

doi:10.11901/1005.3093.2019.462

Chinese Journal of Materials Research

2020, Vol. 34

Issue (5): 392-400 DOI: 10.11901/1005.3093.2019.462

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Effect of Cyclical Flow Velocity on Magnetized Copper Electrolysis Process

YAO Xiayan¹(

), ZHAO Yunyun¹, WANG Junhui², NIU Yongsheng¹, LU Xingwu¹

1.Northwest Research Institute of Mining and Metallurgy，Key Laboratory of New Process for Non-ferrous Metal Smelting and Rare Metal High Utilization Efficiency in Gansu Province, Baiyin 730900, China
2.Baiyin Nonferrous Group Co. Ltd. , Baiyin 730900, China

Cite this article:

YAO Xiayan, ZHAO Yunyun, WANG Junhui, NIU Yongsheng, LU Xingwu. Effect of Cyclical Flow Velocity on Magnetized Copper Electrolysis Process. Chinese Journal of Materials Research, 2020, 34(5): 392-400.

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Abstract

In order to improve the quality of cathode copper, the intense magnetic field was used to enhance the diffusion of Cu²⁺ and the self-purification process of copper electrolysis. From the point of view of ionic magnetism and ionic hydration, experiments on magnetized copper electrolysis at different flow velocity were carried out. The effect of Lorentz force and magnetic field gradient force on the diffusion properties, impurity ion concentration and apparent quality of cathode copper was investigated. The mechanism of copper electrolysis strengthened by vertical orientation magnetic field and horizontal orientation magnetic field was respectively analyzed. Results show that magnetic field can strengthen the convection, weaken the hydrogen bonding, reduce the ion hydration and increase the energy of the system. Besides, the diffusion of Cu²⁺ and the deposition rate of impurity ions such as As, Sb and Bi were also increased, which could improve the clarity of electrolyte and the apparent quality of cathode copper. On the other hand, the dissolved oxygen, microbubbles and surface tension of electrolyte increased with the increase of cyclical flow velocity, so leading to the failure of magnetic field synergy. There is an optimum cyclical velocity to improve the quality of cathode copper in the process of magnetized copper electrolysis.

Key words: metallic materials magnetized electrolysis intense magnetic field copper electrolysis cathode copper

Received: 30 September 2019

ZTFLH:

TF111

Fund: Research Project on Industrial Green Low Carbon Transition and Upgrading in Gansu Province(GGLD-2019-28);Baiyin 2019 Science and Technology Plan(2019-1-12G)

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	Xiayan YAO
	Yunyun ZHAO
	Junhui WANG
	Yongsheng NIU
	Xingwu LU

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https://www.cjmr.org/EN/10.11901/1005.3093.2019.462 OR https://www.cjmr.org/EN/Y2020/V34/I5/392

Fig.1 Schematic diagram of experiment device

Table 1 Chemical composition of the anode (%, mass fraction)

Table 2 Chemical composition of copper electrolyte

Fig.2 Effect of cyclical flow velocity on copper/acid under different orientation magnetic field (a) Cu²⁺ concentration, (b) anodic dissolution, (c) cathode copper precipitation, (d) H₂SO₄ concentration

Fig.3 Effect of cyclical flow velocity on impurity ion concentration in magnetic field with different orientations (a) Sb³⁺, (b) Bi³⁺, (c) Ni²⁺, (d) Fe²⁺, (e) Zn²⁺, (f) Ca²⁺

Table 3 Chemical composition of floating anode slimes samples (%, mass fraction)

Fig.4 Theoretical model of Lorentz force affects ionic hydration (A: negative ions, C: positive ions, B: magnetic field density, F_L: Lorentz force, v: velocity)

Fig.5 Effect of cyclical flow velocity on surface quality of cathode copper under vertical orientation magnetic field (a) 0 m/s, (b) 0.3 m/s, (c) 0.6 m/s, (d) 0.9 m/s, (e) 1.2 m/s

Fig.6 Mechanism of cyclical flow velocity affects magnetized copper electrolysis process (a) 0 m/s, (b) lower cyclical flow velocity, (c) higher cyclical flow velocity

Fig.7 Theoretical model of magnetic gradient force affects ionic hydration (B: magnetic field density, F_G: magnetic gradient force, v: velocity)

Fig.8 Effect of cyclical flow velocity on viscosity and surface tension under different orientation magnetic field (a) viscosity, (b) surface tension

Fig.9 Effect of cyclical flow velocity on surface quality of cathode copper under parallel orientation magnetic field (a) 0.3 m/s, (b) 0.6 m/s, (c) 0.9 m/s, (d) 1.2 m/s

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