EP 2500441 A1 20120919 - Metallic iron nuggets

Title (en)

Metallic iron nuggets

Title (de)

Eisenklumpen

Title (fr)

Pépites de fer métalliques

Publication

EP 2500441 A1 20120919 (EN)

Application

EP 12004528 A 20070726

Priority

EP 07813408 A 20070726
US 82036606 P 20060726

Abstract (en)

Method and system for producing metallic nuggets includes providing reducible mixture of reducing material (such as carbonaceous material) and reducible iron bearing material (such as iron oxide) arranged in discrete portions, such as mounds or briquettes, on at least a portion of a hearth material layer (such as carbonaceous material). A coarse overlayer of carbonaceous material is provided over at least some of the discrete portions. Heating the discrete portions of reducible mixture to 1425 °C or 1400 °C or 1375 °C results in formation of an intermediate product of metallic iron nuggets and slag, and one or more metallic iron nuggets. The intermediate product with less than 5% mass MgO in the slag may have the ratio of percent by weight sulfur in the slag over percent sulfur in the metallic nuggets of at least about 12 or at least about 15. The metallic iron nuggets may have a sulfur content of less than 0.03%.

IPC 8 full level

C21B 13/00 (2006.01); C21B 13/10 (2006.01)

CPC (source: EP)

C21B 13/0046 (2013.01); C21B 13/008 (2013.01); C21B 13/105 (2013.01)

Citation (applicant)

US 29619805 A 20051207
US 63388604 P 20041207
US 6126718 A 20001003 - SAWA YOSHITAKA [JP], et al
EP 1605067 A1 20051214 - KOBE STEEL LTD [JP]
US 2005229748 A1 20051020 - BLEIFUSS RODNEY L [US], et al

Citation (search report)

[X] WO 2006061790 A1 20060615 - NU IRON TECHNOLOGY LLC [US], et al
[A] US 2004154436 A1 20040812 - ITO SHUZO [JP], et al
[A] US 2004076539 A1 20040422 - ITO SHUZO [JP], et al
[A] DE 19543074 A1 19970515 - MANNESMANN AG [DE]
[A] US 6494933 B1 20021217 - SAAGE EBERHARD [DE], et al

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2008014397 A1 20080131; AU 2007279272 A1 20080131; AU 2007279272 B2 20120426; CA 2658897 A1 20080131; CA 2658897 C 20160412; EP 2047000 A1 20090415; EP 2047000 A4 20100414; EP 2500441 A1 20120919; EP 2690181 A1 20140129

DOCDB simple family (application)

US 2007074471 W 20070726; AU 2007279272 A 20070726; CA 2658897 A 20070726; EP 07813408 A 20070726; EP 12004528 A 20070726; EP 13005096 A 20070726