Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2007-11-20
2011-11-01
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C075S551000, C075S552000, C075S569000
Reexamination Certificate
active
08048196
ABSTRACT:
The aim of the invention is to produce stainless steel for all stainless steel products both in the austenitic and the ferritic range, based on liquid pig-iron and FeCr solids, without using a supply of electrical energy. According to the invention, the liquid pig-iron, after being pre-treated in a blast furnace (1), is subjected to a DDD treatment (dephosphorization, desiliconization and desulphuration), is heated, finished or alloyed and deoxidated. The quantity of slag-free liquid pig-iron that has been pre-treated in the blast furnace (1) and a DDD device (2) is separated and introduced into two classic “twin” AOD-L converters (3, 4), where the required chemical process steps (of the heating, decarburization and alloying stages) take place in parallel contrary processes using autogenous chemical energy, the heating stage being carried out first in the first twin AOD-L converter (3) and the decarburization being carried out first in the second twin AOD-L converter (4).
REFERENCES:
patent: 3231369 (1966-01-01), Gorlich et al.
patent: 7998243 (2011-08-01), Rose et al.
patent: 1 508 284 (1970-05-01), None
patent: 2 014 339 (1970-10-01), None
patent: 196 21 143 (1997-08-01), None
patent: 1 310 573 (2003-05-01), None
patent: 02/075003 (2002-09-01), None
patent: 03/106716 (2003-12-01), None
patent: 2006/050963 (2006-05-01), None
Lucas & Mercanti LLP
McGuthry Banks Tima M
SMS Siemag Aktiengesellschaft
Stoffel Klaus P.
Wyszomierski George
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