Read e-book online Electronic Waste: Recycling Techniques PDF

By Hugo Marcelo Veit, Andréa Moura Bernardes

This booklet offers an outline of the characterization of digital waste. additionally, processing ideas for the restoration of metals, polymers and ceramics are defined. This ebook serves as a resource of data and as a tutorial technical reference for working towards scientists and engineers, in addition to for students.

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The ferromagnetic materials can also be included in the category of paramagnetic materials. However, their response to the external magnetic field make them particularly interesting for the application of magnetic separation techniques [6]. Diamagnetic materials: are materials where the induced magnetic field opposes the external magnetic field, generating a repulsion of low intensity. That is, these materials are repelled by the external magnetic field. Examples: copper, mercury, gold, silver, zinc, lead, among others [31].

Zhang and Forssberg [4] studied the liberation degree of metals versus ­non-metals in the recycling of printed circuit boards. The liberation degree, in this case, is extremely important for the success of subsequent mechanical processing. 0 mm, achieving ­virtually total liberation. However, it is important to evaluate the energy required to achieve this level of comminution. According to Masuda et al. [1] comminution energy efficiency is very low, and the energy required is inversely proportional to the size of the particles produced.

Jackel HG, Schubert G, Sander S (2002) Size reduction of scrap by means of horizontal shaft shredders of the swing hammer type. In: Recycling and waste treatment in mineral and metal processing: technical and economic aspects. Hayes PC (1993) Process principles in minerals and materials production. Russo P, Aboussouan L, Birat JP, Sander S, Jäckel HG, Schubert G (2004) Mechanical and metallurgical study of the fragmentation of end-of-life goods in a scrap shredder. Sander S, Scubert G, Jäckel HG (2004) The fundamentals of the comminution of metals in shredders of the swing-hammer type.

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