Patent · US Expired

Unit and method for processing of shredder residues and uses of a sand fraction produced thus

US7389880B2 · kind B2 · utility

13Cited by

8References

32Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Daniel Goldmann · Goslar, DE
Bram den Dunnen · Braunschweig, DE
Michael Knust · Bargteheide, DE

Key dates

Filing date	Sep 18, 2001
Grant date	Jun 24, 2008
Priority date	—
Expiry date	Sep 18, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/52
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method and system are for sorting shredder residues of metal-containing wastes, in particular of body shells Shredder residues are separated into a shredder light fraction and a non-ferromagnetic fraction (shredder heavy fraction). During the sorting of the shredder light fraction and the shredder heavy fraction in preliminary processes and a main process, a crude-sand fraction is produced by separating out at least a ferromagnetic fraction, a fraction containing nonferrous metals, a fiber fraction, and a granulate fraction. In a refining process, the crude-sand fraction is separated into a residual fraction rich in organics, a dust fraction containing heavy metals, a sand fraction depleted in organics and metals, and a metallic fraction, using the sequential process steps of density separation and metal separation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.