EP 2530171 A1 20121205 - METHOD FOR REMOVING IMPURITIES IN MOLTEN CAST IRON, AND CAST IRON RAW MATERIAL
Title (en)
METHOD FOR REMOVING IMPURITIES IN MOLTEN CAST IRON, AND CAST IRON RAW MATERIAL
Title (de)
VERFAHREN ZUR ENTFERNUNG VON UNREINHEITEN AUS GESCHMOLZENEM GUSSEISEN UND GUSSEISENROHMATERIAL
Title (fr)
PROCÉDÉ D'ÉLIMINATION D'IMPURETÉS DANS FONTE EN FUSION ET MATIÈRE PREMIÈRE DE FONTE
Publication
Application
Priority
- JP 2010016251 A 20100128
- JP 2011051195 W 20110124
Abstract (en)
There is provided a method for obtaining a pure melt in which the impurities Mn, Al, Ti, Pb, Zn, and B are removed from molten cast iron and depletion of useful C and Si is suppressed, the method wherein an excess oxygen flame having a theoretical combustion ratio of fuel and oxygen (amount of oxygen (volume) x 5/amount of fuel (volume)) of 1 to 1.5 is directly exposed to the surface of pre-melted molten cast iron, the temperature of the molten cast iron is held at 1250°C or more and less than 1500°C while the melt surface is superheated and an acidic slag is brought into contact with the melt, and an oxygen-containing gas is injected into the interior of the molten cast iron.
IPC 8 full level
C21C 1/04 (2006.01); C21C 1/08 (2006.01); C22C 37/00 (2006.01); C22C 37/10 (2006.01)
CPC (source: EP KR US)
C21C 1/04 (2013.01 - EP KR US); C21C 1/08 (2013.01 - EP KR US); C22C 37/00 (2013.01 - KR); C22C 37/10 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2530171 A1 20121205; EP 2530171 A4 20150715; CN 102782163 A 20121114; CN 102782163 B 20141231; JP 2011153359 A 20110811; JP 5150654 B2 20130220; KR 20130001227 A 20130103; US 2013195712 A1 20130801; WO 2011093237 A1 20110804
DOCDB simple family (application)
EP 11736950 A 20110124; CN 201180007330 A 20110124; JP 2010016251 A 20100128; JP 2011051195 W 20110124; KR 20127022412 A 20110124; US 201113575859 A 20110124