Magnetické vlastnosti odpadových materiálů a analýza možností jejích recyklace pomocí magnetických separátorů.

Abstract

This dissertation thesis deals with magnetic separation micro/nano - particles contained in the liquid suspensions by using newly developed prototypes of magnetic separators. These magnetic separators are functional samples own production for magnetic separation of water, which used to capturing the paramagnetic, ferromagnetic and ferrimagnetic mineral impurities in the stream of liquid substances. These separators are mounted with two or four NdFeB permanent magnets symmetrically around a central separation cell and generate high gradient magnetic field, such a field is created in a separation cell via steel matrix. The main theme of the work is an experimental verification of magnetic separation particle flow ratio using the theoretical model on two liquid suspensions and subsequent comparison with the established theoretical physical model. For the experiment itself is selected liquid suspension containing weakly magnetic particles of Fe2O3 and the second metallurgical sludge suspension. The whole separation process is evaluated by means of optical methods and partially by atomic absorption spectroscopy. Mathematical models of separators with permanent magnets are also discussed in this thesis. Models were created through finite element method by software ANSYS and subsequent optimization using Halbach arrays of permanent magnet. The modeling results were used for the production of a new laboratory magnetic separator with Halbach array of permanent magnets.