Kumar, Vinod and Kumari , Anjan and Jha, Manis K and Vidyadhar, A and Soni, B K (2014) Recycling of valuable metals from poly cracker ash of printed circuit boards (PCBS) by physical beneficiation and hydrometallurgical treatment. In: EPD Congress-2014, 16/02/2014 To 20/02/2014, San Diego Convention Center, San Diego, California. USA..
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In the present paper, recovery of valuable metals from the poly-cracked ash obtained by pyrolysis of discarded PCBs has been studied following physical beneficiation and a hydrometallurgical process alternate to smelting. The ash is subjected to comminution for the separation of metallic components from non-metallic fractions by scrubbing, tabling and froth flotation which enriched the metal in the concentrate ~97% which was further screened to separate high and low metal concentrate. The finer fraction containing ~12% metallic value was leached in acidic solution. Almost all (Cu, Pb, Fe, etc) were leached in 4M HNO3 at 90◦C in 75 min at a pulp density 100 g/L. The characterization of both ash and residues were made by XRD, EPMA, EDS, etc. to validate the experimental results. The metals from the leach liquor could be recovered/separated using solvent extraction techniques which can further be processed to get pure metal salts/ sheets.
|Item Type:||Conference or Workshop Item (Lecture)|
|Uncontrolled Keywords:||Poly cracker ash, Communition, Scrubbing, Froth flotation, Leaching.|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||INVALID USER|
|Deposited On:||03 Mar 2014 09:48|
|Last Modified:||03 Mar 2014 09:48|
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