EP 0602540 B1 20020306 - Agent for desulphurization, dephosphorization, desiliconization and denitrification of molten pig or cast iron and of molten ferrochrome or ferromanganese as well as a process
Title (en)
Agent for desulphurization, dephosphorization, desiliconization and denitrification of molten pig or cast iron and of molten ferrochrome or ferromanganese as well as a process
Title (de)
Mittel zur Entschwefelung, Entphosphorung, Entsilicierung und Entstickung von Roheisen-, Gusseisen-, Ferrochrom- und Ferromanganschmelzen sowie Verfahren
Title (fr)
Agent pour la désulfuration, déphosphoration, désiliciation et dénitration de bains de fonte, de fonte de moulage, de ferro-chrome et de ferro-manganèse ainsi qu'un procédé
Publication
Application
Priority
DE 4242328 A 19921215
Abstract (en)
[origin: US5385599A] An agent for desulfurization, dephosphorization, desiliconizing, and denitriding of ironmelt and melt containing chromium or manganese, consisting of at least one of the following mineral raw-material: alkali-containing plagioclase (feldspar), alkali-containing orthoclase, montmorillonite (perlite), bentonite, muscovite, or zeolithe, and calcium carbide and/or calcium oxide. These mixtures can be blended further with scale, Fe-ores, Cr-ores or Mn-ores and used by standard technologies. The mineralic components, in connection with calcium carbide, lime, iron-ore or scale or other related ores, cause an effective reduction of unwanted elements, such as sulfur, phosphorus, silicium, and nitrogen, in the metal melts. The slags produced are freely skimmed and contain less iron granules than standard agents. Some of these materials may be enriched with alkali oxides by sintering or melting with appropriate compounds, like soda ash. This invention also involves a process for the treatment of iron-, ferrochromium and ferromanganese melts, wherein the components of the agent are fed either pre-mixed or separately into the melt.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
C21C 1/025 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
US 5385599 A 19950131; AT E214106 T1 20020315; DE 4242328 A1 19940616; DE 4242328 C2 19950608; DE 59310267 D1 20020411; EP 0602540 A1 19940622; EP 0602540 B1 20020306; JP H06235011 A 19940823; ZA 939420 B 19940810
DOCDB simple family (application)
US 16663993 A 19931214; AT 93119836 T 19931209; DE 4242328 A 19921215; DE 59310267 T 19931209; EP 93119836 A 19931209; JP 34207093 A 19931214; ZA 939420 A 19931215