Možnosti zdokonalení konvertorového procesu

Abstract

The first part of the diploma thesis deals with a theoretical description of steel production by the converter method using several technologies. The following is a literature review focusing on the reduction and utilization of CO2 emissions during the improvement of steel production in the converter. The practical part was focused on minimizing CO2 emissions. The influence of steel waste preheating, the influence of pig iron temperature and the influence of silicon content in pig iron on the amount of scrap and the resulting production of CO2 emissions were investigated. The comparison was made on the basis of calculated values from the material balance of the K3 model. The calculations took into account the CO2 emissions from the production of pig iron, which were calculated from the annual production of CO2 emissions and the combustion of alternative fuels used to preheat steel waste in the form of anthracite and gaseous coal. It turned out that in terms of the amount of CO2 produced using preheating of steel waste is the most suitable variant of heating with conventional preheating (using coal dosed during oxygen blowing), as the increase in CO2 due to scrap preheating corresponds to a lower CO2 due to lower required share of crude iron for the material and heat balance of the melt. Further possible reductions in total CO2 emissions are supported by higher silicon contents in pig iron, but this reduction is relatively modest.