EP 0044669 A1 19820127 - Self-reducing iron oxide agglomerates.
Title (en)
Self-reducing iron oxide agglomerates.
Title (de)
Selbstgehendes stückiges Eisenoxid.
Title (fr)
Agglomérés d'oxyde de fer auto-réductibles.
Publication
Application
Priority
US 17064380 A 19800721
Abstract (en)
Self-reducing agglomerates of an iron oxide-containing material, such as an iron ore concentrate, having a compressive strength of at least about 45 Kg. are produced by preparing a moistened mixture of the ore concentrate, a finely-divided natural pyrolyzed carbonaceous material having a volatile matter (on dry basis) content of about 20% by weight or less in an amount at least sufficient to reduce all the iron oxide to metallic iron, about 1 to about 30% by weight of a bonding agent, such as burned or hydrated lime, and 0 up to about 3% by weight of a siliceous material (as SiO2), such as silica; forming green agglomerates from this mixture; and hydrothermally hardening the green agglomerates by contacting them with steam under pressure.
IPC 1-7
IPC 8 full level
C21B 13/00 (2006.01); C21B 13/10 (2006.01); C22B 1/14 (2006.01); C22B 1/16 (2006.01); C22B 1/24 (2006.01); C22B 1/243 (2006.01); C22B 1/245 (2006.01)
CPC (source: EP)
C21B 13/105 (2013.01); C22B 1/24 (2013.01); C22B 1/245 (2013.01)
Citation (search report)
- US 3770416 A 19731106 - GOKSEL M
- DE 2517543 A1 19761104 - UNIV MICHIGAN TECH
- US 2793109 A 19570521 - JACK HUEBLER, et al
- US 3264092 A 19660802 - BAN THOMAS E
- DE 1583942 A1 19720406 - BLOCKED IRON CORP
- US 2806779 A 19570917 - CASE SAMUEL L
- DE 1243880 B 19670706 - BLOCKED IRON CORP
- US 3895088 A 19750715 - GOKSEL MEHMET ADNAN
- AU 425513 A
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0044669 A1 19820127; EP 0044669 B1 19880406; AU 543924 B2 19850509; AU 7272681 A 19820128; BR 8104694 A 19820406; CA 1158442 A 19831213; DE 3176704 D1 19880511; ES 504099 A0 19820601; ES 8205434 A1 19820601; IN 157793 B 19860621; JP H0123531 B2 19890502; JP S5773136 A 19820507; MX 156802 A 19881005; ZA 814465 B 19820728
DOCDB simple family (application)
EP 81303130 A 19810709; AU 7272681 A 19810709; BR 8104694 A 19810721; CA 380807 A 19810629; DE 3176704 T 19810709; ES 504099 A 19810720; IN 517CA1982 A 19820506; JP 11344281 A 19810720; MX 18837481 A 19810720; ZA 814465 A 19810701