| Popis: |
E-waste, in particular, PCB is a major component which is the integral part of all the electrical and electronic devices, which will be great source for the natural source deficiency. WPCB has a composition of approximately 28% metals, 23% plastics and remaining percentage as glass and ceramics. Though several methods such as pyrometallurgy, hydrometallurgy and bio-hydrometallurgy have been identified for the recovery of metals and heavy metals, still it has been found with a lot of difficulties. Pyrometallurgical process of recycle helps in immediate recovery of direct metals and it is also one of the conventional and time-consuming process. The emission of toxic gases such as dioxins is opened into the environment, but the emission rate at recycling is much less as compared to the emission during the metallurgical refining process from the ores. This pyrometallurgical process also helps in precious metal recovery like Au, Ag, Pd and some rare earth metals. The metals recovered from the heat treatment process have market value and it can be sold into the market in an easier manner and it reduces the cost for further advanced purification of metals. Cost analysis helps in determining the market value of a scrap PC’s and also helps in quantifying and qualifying the treatment processes and commercial values of metal, precious metal recovered. A comparison study on cost–benefit analysis between two different thermal furnaces namely CVD chamber and muffle furnace on metal recovery efficiencies and costwise efficient were discussed. This discussion would help in industrialising the proper treatment technique and thereby reducing the informal sector. |
