Effect of thermal activation on recovery of copper using microorganisms from ball mill spillage

Panda, S and Panda, S K and Nayak, B D and Rao, D S and Pradhan, N and Sukla, L B and Mishra, B K (2010) Effect of thermal activation on recovery of copper using microorganisms from ball mill spillage. In: Proceedings of the XI International Seminar on Mineral Processing Technology (MPT-2010), Dec 2010, NML Jamshedpur, India.

Restricted to NML users only. Others may use ->



Malanjkhand Copper Project (MCP), India is designed for excavating 2 million tons (MT)/annum of copper ore. The beneficiation plant of MCP utilizes Cu - 0.45 % and above for production of concentrates thereby generating reject (mill spillage) from its ball mill unit. This waste contains mainly chalcopyrite which is recalcitrant to hydrometallurgical process. Economic and eco-friendly extraction of copper from such waste will definitely contribute to country’s copper output. A novel technique using activation of the surface by thermal means aims on efficient copper recovery which is dealt in the present investigation. This process of activation modifies the surface morphology developing cracks, micro pores helping bacterial solution to penetrate and leach out copper efficiently. In the present work, the leaching ability of mesophillic acidophiles consortium consisting predominantly At. ferrooxidans towards this waste was studied in columns at 1 Kg scale. It was found that copper could be recovered at a faster rate compared to the raw ore. 59% copper was recovered through this activation technique as compared to a 4% and 9% from raw ore-ungrounded and grounded respectively. Bacterial leaching parameters such as pH, iron concentration and count of inoculum were monitored during the process.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/2605
Uncontrolled Keywords:Spillage, Chalcopyrite, Thermal activation, At. ferrooxidans, Column leaching.
Divisions:Mineral Processing
ID Code:2605
Deposited On:15 Mar 2011 16:12
Last Modified:19 Aug 2015 14:43
Related URLs:

Repository Staff Only: item control page