|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Emulsion Mediated Low Temperature Pressure Leaching of Base Metals from Mixed Sulfide Minerals through Enhanced Oxygen Mass Transfer
||Shivendra Sinha, Devabrata Mishra, Kamla Kanta Sahu, Archana Agrawal
|On-Site Speaker (Planned)
Total pressure oxidation (TPOX) is widely outreached leaching practice of base metals from sulfide minerals, wherein high temperature (T ~ 200 oC) and oxygen pressure (pO2 ~ 25 Bar) are required. These aggressive conditions intensify the oxygen mass transfer and therefore facilitate metal dissolution. However, challenging-cum-negative aspects of such practice are energy and material intensive requirements and high oxygen demand. Herein, the present study explores the novel emulsified medium for enhancement of oxygen mass transfer, which assists faster metal dissolution at significantly low temperature and pressure. It was possible to achieve quantitative dissolution (>98%) of Cu, Ni and Co from mixed sulfide minerals at T ~95 0C and pO2 ~ 2 Bar using an emulsion of 2.5 % (v/v) n-Hexadecane in dilute sulfuric acid. In addition, n-Hexadecane was found to be inert, stable and immiscible thus can be easily recovered and recycled in subsequent leaching stages.
||Planned: At-meeting proceedings