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Unconventional methods of reclamation of used moulding sands

Dańko R.

Archives of Foundry Engineering

2010

Vol. 10, iss. 3

29--34

Analysis of the literature provides information on a constant search for new ways of regenerating of moulding sand deprived disadvantages of existing solutions, especially in the case of low efficiency of regeneration of a mixture of used masses of certain technologies, and high energy intensity of the high temperature heat recovery. In the advanced stage of the research are both attempts to apply a very high temperature (about 2200 oC) for short-term impact on the surface of regenerated moulding sand, as well as support of thermal regeneration of oxygen addition in order to increase the temperature and direct combustion of organic components. At the second end of the scale are attempts to apply the extremely low temperatures to changes in physical properties of used binding material to reduce the work of crushing and recycling of other waste (eg. bentonite). The article presents the results of author’s own investigation of the regeneration process of mechanical and thermal carried out with the new, unconventional treatments which improve the reclaimability of used moulding sands.