EP 0161721 A1 19851121 - Process for thermo-hardening iron pellets on a moving grate.
Title (en)
Process for thermo-hardening iron pellets on a moving grate.
Title (de)
Verfahren zum Hartbrennen von Eisenerzpellets auf einem Wanderrost.
Title (fr)
Procédé de durcissement par chauffage sur une grille mobile de boulettes de fer.
Publication
Application
Priority
- DE 3418468 A 19840518
- CN 85104327 A 19850608
Abstract (en)
1. A process for hard-burning haematite and/or iron ore pellets which contain heat-consuming fluxes on a travelling grate under oxidizing conditions by means of hot gases passed therethrough, the pellets containing incorporated therein solid carbonaceous material which supplies part of the heat required for hard-burning, characterized in that the Cfix content of the solid carbonaceous material incorporated in the pellets is measured stoichiometrically in such a way that it is up to 50% in excess of that amount required to reduce haematite to magnetite and of that amount required substantially to decompose the heat-consuming fluxes present, and that the hot gases are passed through the pellet bed in the burning zone of the travelling grate under a pressure of 5 to 20 mbar below atmospheric pressure.
Abstract (de)
Zur Senkung des Energieverbrauches während des oxidierenden Brennens wird in die Pellets festes kohlenstoffhaltiges Material in einer Menge eingebunden, dass der Cfix-Gehalt in den Pellets über der stöchiometrischen Menge liegt, die zur Reduktion von Hämatit zu Magnet erforderlich ist, und/oder über der Menge liegt, die zur Zersetzung von wärmeverbrauchenden Zuschlagstoffen erforderlich ist. Die heissen Gase werden in der Brennzone des Wanderrostes mit einem Unterdruck von 5 bis 20 mbar durch das Pellet-Bett geleitet.
IPC 1-7
IPC 8 full level
C22B 1/20 (2006.01); C22B 1/16 (2006.01); C22B 1/24 (2006.01)
CPC (source: EP)
C22B 1/2413 (2013.01)
Citation (search report)
- [X] CH 398659 A 19660315 - METALLGESELLSCHAFT AG [DE]
- [A] US 4162284 A 19790724 - DAHL ERIK Q [NO]
- [A] US 2758919 A 19560814 - DEVANEY FRED D, et al
- [A] US 2696432 A 19541207 - WILSON DAVIS EDWARD
- [A] FR 1490768 A 19670804 - MIDLAND ROSS CORP
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
EP 0161721 A1 19851121; EP 0161721 B1 19880504; AU 4268785 A 19851121; AU 571695 B2 19880421; BR 8502306 A 19860121; CA 1258376 A 19890815; CN 1003943 B 19890419; CN 85104327 A 19861203; DE 3418468 A1 19851121; DE 3562492 D1 19880609; IN 161245 B 19871031; JP S60245732 A 19851205; ZA 853695 B 19870128
DOCDB simple family (application)
EP 85200718 A 19850507; AU 4268785 A 19850517; BR 8502306 A 19850516; CA 481829 A 19850517; CN 85104327 A 19850608; DE 3418468 A 19840518; DE 3562492 T 19850507; IN 529CA1984 A 19840725; JP 9352985 A 19850430; ZA 853695 A 19850515