Patent Number: 6,251,160

Title: Method of de-chroming and/or depleting the MgO content of steel slag

Abstract: In a process for dechroming, and/or depleting the MgO content of, steel slags, oxygen is introduced into the liquid steel slag to an extent sufficient for converting iron quantitatively to iron oxide and at least 5% by weight of the iron oxide contained in the slag to iron-III-oxide. The oxidized slag obtained solidifies and is disintegrated, whereupon the paramagnetic portions formed are magnetically isolated and separated from the dechromed slag.

Inventors: Edlinger; Alfred (Baden, CH)

Assignee: "Holderbank" Financiere Glarus AG

International Classification: C04B 5/06 (20060101); C04B 5/00 (20060101); C22B 34/32 (20060101); C22B 7/04 (20060101); C21C 5/36 (20060101); C21B 3/00 (20060101); C21C 5/28 (20060101); C21B 3/06 (20060101); C22B 34/00 (20060101); C21C 5/00 (20060101); C22B 007/04 (); C21B 003/04 (); C21B 003/06 ()

Expiration Date: 06/26/2018