| 摘要 |
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 liqui d pig-iron and FeCr solids, without using a supply of electrical energy. Acc ording to the invention, the liquid pig-iron, after being pre-treated in a b last furnace (1), is subjected to a DDD treatment (dephosphorisation, desili conisation and desulphuration), is heated, finished or alloyed and deoxidate d. The quantity of slag-free liquid pig-iron that has been pre-treated in th e blast furnace (1) and a DDD device (2) is separated and introduced into tw o classic "twin" AOD-L converters (3, 4), where the required chemical proces s steps (of the heating, decarburisation and alloying stages) take place in parallel contrary processes using autogenous chemical energy, the heating st age being carried out first in the first twin AOD-L converter (3) and the de carburisation being carried out first in the second twin AOD-L converter (4) .
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