Patent · US Expired

Method for recovering residual matter accumulated in the production and machining of steel

US4336218A · kind A · utility

4Cited by

2References

16Claims

0Family size

Inventors

Werner Kaas · Dinslaken, DE
Hans-Helmut Borggrefe · Willich, DE
Klaus Unger · Krefeld, DE

Key dates

Filing date	Oct 22, 1980
Grant date	Jun 22, 1982
Priority date	—
Expiry date	Oct 22, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/20
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of recovering particulate matter having a high metal content and including dust resulting from production of steel and chips from machining of steel. The method includes selecting the chips that have a length of 7 to 30 mm; mixing the dust and the selected chips in the ratio of about 70:20 to 30:60 pts/pts; wetting the dust, before or after it has been mixed with the chips, to a moisture content of 3 to 8% by weight to hydrate free lime in the dust; and mixing the dust and selected metal chips with a suitable binder; and forming the mixture into briquettes.

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