Method for detaching coatings from scrap

摘要

The invention relates to a method for the processing of metal scrap, in particular steel scrap, wherein the metal scrap material is treated with at least one fluid with a view to removing surface coatings before a spectroscopic analysis of the metal scrap composition is performed. On the basis of this composition the metal scrap can then be sorted and further processed in a purposeful manner. Moreover, the fluid used for the removal of the surface coatings can be suitably treated to recover the metal constituents contained therein. On the one hand, a resource-conserving and economic recovery of metals, in particular zinc, contained in surface coatings is achieved by means of the inventive method and, what is more, the method also enables a purposeful sorting of metal scrap material to be performed for a variety of uses in the iron and steel producing industry.

主权项

1. Method for the processing of metal scrap having a surface coating, comprising the following steps:
treating metal scrap with at least one fluid to remove surface coatings, determining the position of the scrap pieces and the shape or form of the scrap pieces, making an automated determination of the locations on the scrap pieces based on the positions so ascertained and the shape or form of the scrap pieces whereby a spectroscopic analysis of the composition can be performed, spectroscopically analyzing the scrap metal composition, sorting the metal scrap materials according to the composition of the scrap metal, and treating the fluid whereby to recover the metal contained in the surface coatings.