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METHOD AND DEVICE FOR STAINLESS STEEL PRODUCTION WITHOUT ELECTRICAL ENERGY SUPPLY ON THE BASIS OF PIG-IRON THAT HAS BEEN PRETREATED IN A DDD INSTALLATION
METHOD AND DEVICE FOR STAINLESS STEEL PRODUCTION WITHOUT ELECTRICAL ENERGY SUPPLY ON THE BASIS OF PIG-IRON THAT HAS BEEN PRETREATED IN A DDD INSTALLATION
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机译：基于已在DDD安装中预处理过的Pig-Iron铁的不锈钢生产方法和装置
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摘要
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 (dephosphorisation, desiliconisation 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 fiirnace (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, decarburisation 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 decarburisation being carried out first in the second twin AOD-L converter (4).
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