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Innovative method to extract indium from LCD panels

Liquid crystal displays (LCDs) are becoming of common use as a replacement for the old cathode ray tube monitors. The new technologies largely rely on the use of critical raw materials, such as indium. This element makes up the transparent conductive coatings in the thin film displays. Considering the high demand of indium for electric and electronic equipment and the limited size of the reserves, the importance of indium recycling is increasing. Waste electric and electronic equipment (WEEE)...

Secondary indium production from end-of-life liquid crystal displays

In 2014, the European Union identified 20 raw materials critical for economic importance and high supply risk. Indium, used in several innovative technologies, is among such critical raw materials. Generally, it is mined as a by-product of zinc from a mineral named sphalerite, with a concentration between 1 and 100 ppm. Currently, the largest producer of indium is China and about 84% of the worldwide indium consumption is used for liquid crystal display (LCD) production, in particular to form...

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