کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4365289 | 1301750 | 2011 | 7 صفحه PDF | دانلود رایگان |
Bioleaching studies were conducted to evaluate the extraction of copper from combined flotation concentrate and smelter dust using two different dust-addition strategies, non-fractional (simultaneously with concentrate) and fractional (step-wise dust addition) in stirred tank reactors. The highest copper extraction obtained with the fractional dust addition was up to 94% while extraction using the non-fractional method leveled off at approximately 44%. Thus, an increased copper recovery of about 50% was achieved with the fractional dust-addition method. It seems that the main reason for increased copper recovery using fractional dust addition could be the control and prevention of chalcopyrite passivation (according to SEM/EDS, XRD, and quantitative mineralogy data). This leads to its improved dissolution.
► In this research, copper bioleaching from combined flotation concentrate and smelter dust was investigated.
► A couple of bioleaching methods were investigated in this work: fractional and non-fractional dust-addition strategies.
► The highest copper extraction obtained with the fractional dust-addition was up to 94%.
► The extraction using the non-fractional method leveled off at approximately 44%.
Journal: International Biodeterioration & Biodegradation - Volume 65, Issue 8, December 2011, Pages 1208–1214