EP 2039788 A1 20090325 - DEPHOSPHORIZATION METHOD IN THE PROCESS OF SMELTING NI-CR PIG IRON FROM A NICKEL OXIDE ORE
Title (en)
DEPHOSPHORIZATION METHOD IN THE PROCESS OF SMELTING NI-CR PIG IRON FROM A NICKEL OXIDE ORE
Title (de)
ENTPHOSPHORUNGSMETHODE BEI DEM VERFAHREN DER VERHÜTTUNG VON NI-CR-ROHEISEN AUS EINEM NICKELOXID-ERZ
Title (fr)
ROCÉDÉ DE DÉPHOSPHORISATION DANS UN PROCESSUS DE FONTE EN GUEUSE NI-CR À PARTIR D'UN MINERAI D'OXYDE DE NICKEL
Publication
Application
Priority
- CN 2006002032 W 20060811
- CN 200610098741 A 20060712
Abstract (en)
A dephosphorization method in the process of smelting Ni-Cr pig iron from a nickel oxide ore compi basicity oft lica, then adding limestorses the following steps: adjusting the heraw ore to 0.4-0.7 by adding limestone or si ne and coke powder, sintering to obtain sintered ore with abasicity of 0.5-0.7, and smelting the sintered ore to obtain Ni-Cr pig iron, in which the amount of the coke powderin the sintering process is 9-17% based on total weight, P content of the coke is not greater than 0.016%, P content of the limestone is not greater than 0.008%, P content of the raw ore is not greater than 0.012%.The P content could be reduced to lessthan 0.035% in one pass and in low cost without contamination by using the method.
IPC 8 full level
C22B 1/16 (2006.01); C21B 3/02 (2006.01); C21B 5/02 (2006.01)
CPC (source: EP)
C21B 13/006 (2013.01); C21B 13/008 (2013.01); C21B 13/14 (2013.01); C22B 1/16 (2013.01); C22B 5/10 (2013.01); C22B 23/005 (2013.01); C22B 23/023 (2013.01)
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 NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
EP 2039788 A1 20090325; EP 2039788 A4 20110223; CN 101020943 A 20070822; WO 2008009178 A1 20080124
DOCDB simple family (application)
EP 06775350 A 20060811; CN 2006002032 W 20060811; CN 200610098741 A 20060712