Effect of additives on anode passivation in direct electrolysis process of copper—nickel based alloy scraps

Li, Lei; Li, Hongjuan; Qiu, Shi-wei; Wang, Hua

doi:10.1007/s11771-018-3780-1

Cited by 4 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The former uses the electrolytic step through the production of pure copper from the impure casting anode by the electrorefining process. While the later uses the electrolytic step through the electrowinning process [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Optimization of Charge Materials Ranges in Converter Furnace with Enhanced Passivation Time in Copper Electrorefining Process: A Mixture Design Approach

Feizabad

Khayati

Hernashki

et al. 2021

IJE

View full text Add to dashboard Cite

In this study, the design of experiments is used to study and model the time of passivation in copper electrorefining as a function of the charge of melting furnace through the preparation of copper casting anodes. As a result of optimization for the proposed optimized anodes, the charge percent values of concentrate (Co), refinery scrap (RS), and non-refinery scrap (NRS) were proposed equals to 69.1, 0.574 and 30.32 (wt.%), respectively. Experimental data confirmed the enhanced passivation time of the proposed anode was 6520 s. Also, it was observed that the molar ratio of As/(Bi+Sb) and Ag/(Se+Te) are the key factors in passivation time. Finally, the relation of passivation time (seconds) with the charge of melting furnace is proposed as : t (s)= -3728.98 × Co + 4640.00 × RS + 3141.00 × NRS + 17763.27 × Co × RS + 25547.65 × Co × NRS -1758.00 × RS × NRS. Moreover, adding of As ingot in casting anodes as a dose dependent of non-refinery scrap portion in the input charge of the melting unit can effectively prolong the time of passivation.

show abstract

Section: Introductionmentioning

confidence: 99%