Jet Process for Highest Scrap Rate in Converter Steelmaking
Steel is a material ideal suited for recycling,typically 25 to 50 years after its application steel is returned as scrap.In countries with growing economies where more and more steel was consumed over the last decades,the scrap volume on the market is expected to grow considerably within the next years and consequently scrap price is expected to fall.This is especially true for China where enormous amounts of steel have been consumed in the last decades.Together with the large installed base of integrated steel plants,solutions will be required to use these additional scrap within the existing steelmaking facilities; this means operating the converters with higher scrap rates.Moreover,flexible solutions that allow varying the scrap rate according to actual market situations are needed as market prices became more and more volatile in the last years.The Jet Process was developed for such markets and trends; it comprises a bottom blowing converter with coal injection combined with a hot blast system.The oxygen enriched hot blast,generated in a pebble heater ensures high post combustion rates and good heat transfer from the gas to the bath.Hence,the chemical energy of the coal injected is used to the maximum extent possible.As the total amount of coal injected can be varied in a very wide range,a rate of scrap charged to the converter between 0%and 50%,with special hot heel operation even 100%can be realized.Due to the direct use of the coal for scrap melting any kind of conversion losses are avoided,making the process very efficient and cost attractive.
Gerald WIMMER Krzysztof PASTUCHA Erich WIMMER
Primetals Technologies Austria GmbH
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
140-142
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）