Copper Recovery Using Bioleaching Process with a Mix Culture of Sulfobacillus Acidophilus, Acidimicrobium Ferrooxidans and Sulfobacillus Thermosulfidooxidans and Process Optimization
Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CHECONF03_405
تاریخ نمایه سازی: 14 آذر 1395
Abstract:
The purpose of this study is to optimize the recovery process of copper from the low-grade ore samples collected from Sarcheshmeh, Kerman, Iran. The recovery is performed through a bioleaching process with its related considerations. A mix culture of microorganisms including Sulfobacillus Acidophilus, Acidimicrobium Ferrooxidans and Sulfobacillus Thermosulfidooxidans is applied due to the potential capacity of them in the field of ferrous-iron-oxidizing processes.Box-Behnken design was selected as the Design of Experiment (DOE) method considering the four effective factors and the three levels of them. These factors include pH. Temperature, culture percentage and chalcopyrite concentration. In addition, the copper extraction percentage was considered as the response which must be optimized. It should be noted that all of the DOE and analysis of variances (ANOVA) were done using Minitab 16 Software.After ANOVA evaluation, the optimum conditions for this process by a mix culture of aforementioned strains are pH 1, a temperature of 59°C, culture percentage of 15% and chalcopyrite concentration of 19%. Under these circumstances, the best optimized copper extraction percentage of 83% will be attained.
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Authors
Seyyed HamidReza Tabatabaei
Iranian Babak Copper Company, ShahrBabak, Kerman, Iran