Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions
Despite a great thermodynamic driving force, copper cementation by aluminum from sulfate solutions involves a relatively slow kinetics due to the presence of the passive oxide film on the surface of aluminum. The previous studies have confirmed the positive effect of the presence of small amounts of...
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| Format: | Article |
| Language: | fas |
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Isfahan University of Technology
2017-06-01
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| Series: | Journal of Advanced Materials in Engineering |
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| Online Access: | http://jame.iut.ac.ir/article-1-766-en.html |
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| author | M. Asadrokht A. R. Zakeri |
| author_facet | M. Asadrokht A. R. Zakeri |
| author_sort | M. Asadrokht |
| collection | DOAJ |
| description | Despite a great thermodynamic driving force, copper cementation by aluminum from sulfate solutions involves a relatively slow kinetics due to the presence of the passive oxide film on the surface of aluminum. The previous studies have confirmed the positive effect of the presence of small amounts of chloride ion on reducing the scale of this problem. In this paper, the effect of concurrent ball milling on the kinetics of this process has been investigated. The cementation experiments were carried out in a polyamide jar with alumina balls inside by planetary ball milling. The studied parameters were ball number (0, 4), temperature (25-55 °C) and time (0-240 s). All experiments were conducted at constant condition of [Cu2+] = 6 g/L, [Cl−] = 75 mg/L, rotation speed of 160 rpm, average aluminum particle size of 279 µm and [H+] = 1.94×10-3. The results showed that concurrent ball milling reduces the induction period of the cementation process to less than 120 s. The apparent rate constant of cementation showed the positive influence of simultaneous milling on the kinetics of the studied cementation process. Moreover, activation energies of the induction and main periods were calculated to be respectively 86 and 26 kJ.mol-1, indicating the shift of the reaction mechanism from chemical control to mass transfer control. |
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| id | doaj.art-3f237425a0bf4271b1d9a69e5f0bd5f7 |
| institution | Directory Open Access Journal |
| issn | 2251-600X 2423-5733 |
| language | fas |
| last_indexed | 2024-12-17T21:43:37Z |
| publishDate | 2017-06-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Advanced Materials in Engineering |
| spelling | doaj.art-3f237425a0bf4271b1d9a69e5f0bd5f72022-12-21T21:31:31ZfasIsfahan University of TechnologyJournal of Advanced Materials in Engineering2251-600X2423-57332017-06-013618796Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling ConditionsM. Asadrokht0A. R. Zakeri1 Metal Extraction Research Laboratory, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran Metal Extraction Research Laboratory, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran Despite a great thermodynamic driving force, copper cementation by aluminum from sulfate solutions involves a relatively slow kinetics due to the presence of the passive oxide film on the surface of aluminum. The previous studies have confirmed the positive effect of the presence of small amounts of chloride ion on reducing the scale of this problem. In this paper, the effect of concurrent ball milling on the kinetics of this process has been investigated. The cementation experiments were carried out in a polyamide jar with alumina balls inside by planetary ball milling. The studied parameters were ball number (0, 4), temperature (25-55 °C) and time (0-240 s). All experiments were conducted at constant condition of [Cu2+] = 6 g/L, [Cl−] = 75 mg/L, rotation speed of 160 rpm, average aluminum particle size of 279 µm and [H+] = 1.94×10-3. The results showed that concurrent ball milling reduces the induction period of the cementation process to less than 120 s. The apparent rate constant of cementation showed the positive influence of simultaneous milling on the kinetics of the studied cementation process. Moreover, activation energies of the induction and main periods were calculated to be respectively 86 and 26 kJ.mol-1, indicating the shift of the reaction mechanism from chemical control to mass transfer control.http://jame.iut.ac.ir/article-1-766-en.htmlcopper cementationaluminum powderball millingactivation energy |
| spellingShingle | M. Asadrokht A. R. Zakeri Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions Journal of Advanced Materials in Engineering copper cementation aluminum powder ball milling activation energy |
| title | Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions |
| title_full | Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions |
| title_fullStr | Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions |
| title_full_unstemmed | Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions |
| title_short | Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions |
| title_sort | kinetics of copper cementation by aluminum powder from sulfate solution under ball milling conditions |
| topic | copper cementation aluminum powder ball milling activation energy |
| url | http://jame.iut.ac.ir/article-1-766-en.html |
| work_keys_str_mv | AT masadrokht kineticsofcoppercementationbyaluminumpowderfromsulfatesolutionunderballmillingconditions AT arzakeri kineticsofcoppercementationbyaluminumpowderfromsulfatesolutionunderballmillingconditions |