Groundbreaking energy saving blast furnace technologies are needed to reduce the energy costs in the production of hot metal and converter steel. The reduction in coke consumption and increase in pro ductivity when hot reducing gases are injected into the blast furnace are assessed on the basis of calculations and industrial trials. The composition of the reducing gases is described before and after compression of the blast furnace gases. Systems for recycling the blast furnace gas and removing the CO 2 are considered. The economic and energy benefits obtained by the injection of hot reducing gases are appraised. The energy effi ciency of hot metal production is increased by 40%.
According to the Russia National cadastre, emissions of carbon dioxide in the steel industry in 2019 in the sector “Industrial emissions” accounted for near 50% of the whole volume of its emissions in the whole country’s industry. A perspective way to decrease emissions of greenhouse gases is application of hydrogen in technological processes of metallurgical stuff production. A brief characteristic of basic technologies of hydrogen production presented. Concept of hydrogen technology development in steel industry of Russia stated, basic directions of metallurgical subindustries restructing related to implementation of the new fuel – “brown” hydrogen presented. Possibilities of “brown” hydrogen obtaining as a secondary energy resource of metallurgical production considered. Results of calculation of economic, energy and ecological effectiveness of cast iron, steel and “brown” hydrogen production in electric-furnace melting facilities of new type presented. It was shown that replacement of scheme “blast furnace-basic oxygen furnace”, including production of sinter and coke, by electric-furnace melting production with obtaining hot metal and steel from ore-coal briquettes and application of “brown” hydrogen and recycling of carbon dioxide enables to exclude greenhouse gases emissions. Capital investment into the hydrogen project of 1.0 million t/year capacity with restructing production capacities will account for 9.5 billion Rubles (120.0 million euro), economical effect – 5.4 billion Rubles (70.0 million euro), period of capital investments payback – 1.8 year.
Participants were greeted at the plenary session of the Congress by President of the Association of Steelmakers K. L. Kosyrev, Executive Director of the Severskii Pipe Plant M. V. Zuev, Chief Federal Inspector A. E. Berezovskii, and Lead Engineer at the United Metallurgical Company A. A. Klachkov.The scientific and technical reports presented in this session reflected the current state of international and Russian metallurgy and the growth prospects of the metallurgical industry in the near-term.In the report prepared by O. V. Yuzov, A. M. Sedykh, S. Z. Afonin, and T. M. Petrakova, "Trends of Industrial and Economic Indicators," it was noted that after 1990 Russian ferrous metallurgy underwent fundamental changes in the scale of production (Table 1), technical sophistication, and the potential of the sector.The most important indices of companies' performance declined significantly during the 1990s. The watershed year was 2000. The volume of investment in the industry grew to more than 1.6 trillion rubles in the period 2000-2013, this amount including roughly 400 billion rubles to reinvigorate and improve pipe production. The same period also saw an improvement in the performance indices of blast furnaces. Average furnace productivity increased 10% and average coke rate decreased 9%. There were also changes in the structure and volume of production of steel (Table 2): the output of BOF steel rose by one-third and the production of steel in electric furnaces increased by a factor of 2.3, while open-hearth (OH) steelmaking experienced a six-fold decline. The volume of steel that was continuously cast grew by a factor of 1.9 and the use of ladle methods of treating steel became more common. The volume of steel treated in ladle-furnace units increased by a factor of 7.5 and the volume of vacuum-degassed steel went up by a factor of 5.5.The industry was also active in renovating and upgrading the equipment used to make rolled products. There were increases in the production of flat-rolled products and cold-rolled sheet. More flat-rolled products were also given coatings, thanks to large investment projects carried out at the Magnitogorsk, Cherepovets, and Novolipetsk combines. In 2000, pipe plants made roughly 73% of their steel in OH furnaces and continuously cast just 8% of this amount. Now, all tube steel is made in electric furnaces and is cast on continuous casters, and all pipe shops are equipped with vacuum-degassing and ladle-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.