Extraction of Tin and Copper by Acid Leaching of PCBs
نویسندگان
چکیده
Printed circuit board (PCB) waste is generally dumped as a landfilling or treated pyrometallurg ically, which consumes enormous power, generates hazardous gases and also destroys valuable PCB components. For recycling of the components, they must be separated from the printed circuit boards which is a cumbersome task. For its simplification, the rate of d issolution of solder with acids like Hydrochloric and Nitric of different concentrations was studied. Nitric acid was found suitable and used for the extract ion of copper and tin at room temperature. In the leached solution suspended tin and copper nitrates were obtained. X-ray d iffraction (XRD) and Energy dispersive X-ray analysis (EDAX) was done to characterize the precipitate obtained. Copper in leached solution was recovered by cementation.
منابع مشابه
Processing of Copper Anode-slimes for Extraction of Metal Values
Processing of anodic slimes from an Egyptian copper electrorefining plant, exhibiting high contents of copper, lead, tin and silver has been presented. The proposed hydrometallurgical process consists of two leaching stages for extraction of copper with H2SO4 – O2 and silver with thiourea – Fe. Pyrometallurgical treatment of the leaching solid residue for production of Pb-Sn soldering alloy was...
متن کاملOptimized Leaching Conditions for Selenium from Sar-Cheshmeh Copper Anode Slimes
The recovery process of selenium from Iranian Sar-Cheshmeh copper anode slimes employing hydrometallurgical methods has been investigated. The copper anode slimes are made up of those components of the anodes, which are not soluble in the electrolyte. They contain varying quantities of precious metals like gold, silver, selenium and tellurium. They are being extracted as a by product in th...
متن کاملFluoride Precipitation of Cu Over Fe in a Selected pH Window
Fe is an impurity in most leach liquors. Its coexistence with copper in leaching solution of chalcopyrite (CuFeS2) which is the most important mineral of copper creates major extraction problems. Hydrochloric acid dissolves both copper and iron during chloride leaching of this mineral. Separation of Fe from Cu is thus necessary to obtain pure copper. This paper presents a novel metho...
متن کاملPreparation of nano silver powder from acid leaching tail in gold room
According to the unique properties and many applications of nano silver powder, it was prepared from acid leaching tail solution. The low value residual gold and silver ions were occurred with fellow heavy metals as pollutants (Fe2+, Cu 2+ and Zn2+) in acid leaching tail solution in Mouteh gold mine in Iran. Preparation of nano silver particles was achieved in two steps: first, by addition of a...
متن کاملPreparation of nano silver powder from acid leaching tail in gold room
According to the unique properties and many applications of nano silver powder, it was prepared from acid leaching tail solution. The low value residual gold and silver ions were occurred with fellow heavy metals as pollutants (Fe2+, Cu 2+ and Zn2+) in acid leaching tail solution in Mouteh gold mine in Iran. Preparation of nano silver particles was achieved in two steps: first, by addition of a...
متن کامل