Simulation of Bioleaching Heat Effects for Enhancement of Copper Recovery from Sarcheshmeh Chalcopyrite

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• 作者：Ali Reza Mahmoudian (1)
  S. K. Sadrnezhaad (1)
  Zahra Manafi (2)
  
• 刊名：Metallurgical and Materials Transactions B
• 出版年：2014
• 出版时间：August 2014
• 年：2014
• 卷：45
• 期：4
• 页码：1204-1212
• 全文大小：1,599 KB
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• 作者单位：Ali Reza Mahmoudian (1)
  S. K. Sadrnezhaad (1)
  Zahra Manafi (2)
  
  1. Department of Materials Science and Engineering, Sharif University of Technology, Azadi Ave., P. O. Box 11155-9466, Tehran, Iran
  2. Hydrometallurgy Research Unit, R&D Center, Sarcheshmeh Copper Complex, Rafsanjan, Iran
  
• ISSN：1543-1916

文摘

A heat-transfer model was formulated to determine the distribution of temperature within a bioheap of chalcopyrite of Sarcheshmeh copper mine. Bioleaching employs mixed mesophilic and thermophilic microbes for Cu extraction. Thermophiles are better than mesophiles to dissolve CuFeS2. The solution irrigation and aeration rates were taken into account as the main operational factors. The model was validated by comparing the temperature profiles of test columns with those of bioheap. The model was used to find the optimal ratio of irrigation to aeration. It was found that when the solution was fed at a flow rate of 5?kg/m2?h and air was blown at a flow rate of 7.5?kg/m2?h, the transition from a mesophilic to thermophilic state inside the heap was possible. In this situation, the maximum temperature rise inside the heap was about 332?K (59?°C) after 60?days.