CARACTERIZAÇÃO E PROCESSAMENTO DE TELAS DE LCD DE CELULARES VISANDO A RECICLAGEM

Abstract

http://dx.doi.org/10.5902/223611707314

The great technological development leads to a large consumption of electronic products. Theelectronics are increasingly becoming obsolete and faster discarded, often without adequatetreatment, contaminating water, soil and air by being exposed to the environment. Among theseproducts are the mobile phones which have as a major component the LCD panel (Liquid CrystalDisplay). The LCD panel consists of multilayers of different materials, some with high added value,such as indium tin oxide (ITO). The presence of noble materials in the composition of this type ofresidue makes its recovery profitable. The objective of this study is to characterize and separatethe different materials that constitute the LCD panels of cell phones into disuse. Initially, thedifferent materials that form the panels are manually separated such as adhesives, diffusivesheets , reflective sheets, connectors, polarizing film, plastic frame and the glass panel with ITO.The polarizing film that adheres to glass was removed through a bath of solvent. Then, weperformed a milling of the screen in a knives mill. In this milling process were used screenscontaining polarizing film and screens without the film, in order to obtain a uniform particle sizeaiming the recovery of the elements present. With these procedures the mass ratio of eachmaterial present in the cellular LCD panels was obtained, as well as a material with low particlesize, suitable to undergo to a hydrometallurgical processes.