Method for processing waste or waste fractions, in particular car shredder light fractions
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United States of America Patent
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May 30, 2000
Grant Date -
N/A
app pub date -
Aug 5, 1997
filing date -
Dec 11, 1995
priority date (Note) -
Expired
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Abstract
The method for processing waste or waste fractions, such as, for example, household refuse, car shredder light fractions or the like, provides for pyrolysis, gasification and/or combustion, whereupon the residues are melted under reducing conditions. The reduced portions are then are subjected to a stepwise oxidation, with chromium being quantitatively separated in a first oxidation stage. After this, a calcium ferrite slag is formed by further oxidation, whereupon the remaining metal bath is further processed in order to recover nonferrous heavy metals.
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