Evaluation of the effect of residual silver in copper on the cementation process by factorial design and multiple regression analysis

Duygu Aǧaoǧullari*, Ismail Duman, Özgül Keleş

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Residual silver in cementator copper was studied to examine its effect on the efficiency of cementation process in form of reduced silver by considering reaction duration, silver content and rotation speed of copper electrodes. The experiments were conducted at room temperature with 100 mm2 non-rotating and rotating disc copper electrodes (0 and 500 rpm) alloyed with different Ag ratios (0.5 and 10 %). The reactions were carried out in nitrate solutions in certain reaction time (10 min. and 2 h). Experimental parameters and their levels were determined by precursor tests. The amounts of reduced silver (mg) were expressed as process output. Experiments were designed by full factorial design (2k) method and analyzed using ANOVA and multiple regression analysis. The maximum amount of reduced silver was obtained at a silver content of 0.5 % with non-rotating disc copper electrode in 2 h reaction duration. The effective parameters on the cementation process were determined as reaction duration, reaction duration and rotation speed of copper electrode and silver content of copper electrode. Correlation coefficients (R2 and R2Adj) were calculated as 0.978 and 0.948, respectively.

Original languageEnglish
Title of host publicationTMS 2011 - 140th Annual Meeting and Exhibition, Supplemental Proceedings
Pages815-823
Number of pages9
Publication statusPublished - 2011
EventTMS 2011 - 140th Annual Meeting and Exhibition - San Diego, CA, United States
Duration: 27 Feb 20113 Mar 2011

Publication series

NameTMS Annual Meeting
Volume3

Conference

ConferenceTMS 2011 - 140th Annual Meeting and Exhibition
Country/TerritoryUnited States
CitySan Diego, CA
Period27/02/113/03/11

Keywords

  • Convection
  • Factorial design
  • Gold refinement
  • Regression
  • Silver cementation

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