EVRAZ Nizhny Tagil Iron and Steel Works, Nizhny Tagil, Russia

M. A. Ivanov, Chief Specialist, Master of Physics
E. G. Kalimulina, Chief Specialist of Technical Management, e-mail: elena.kalimulina@evraz.com
A. A. Serebrennikov, Project Manager (for investment activities)

VRP Ural, Nizhny Tagil, Russia

D. A. Pomortsev, Chief Engineer

In order to reduce sulfur dioxide emissions in the processes of cooling fiery-liquid blast-furnace slag, an analysis of the physical processes occurring during cooling of nonfractional slag in a bulk cone or pile was performed. Based on the obtained results, an improved method for processing fiery-liquid blast-furnace slag without water irrigation is presented. The results of the corresponding pilot tests are presented. The average specific productivity of the cooling front, compared to the existing practice of cooling without water irrigation, increased from 0.18 to 0.48 t/(h∙m), which is comparable with a similar indicator of 0.62 t/(h∙m), obtained with slag irrigation with water. The proposed reduction in capital costs for organizing the technological process of processing fiery-liquid blast-furnace slag without water irrigation amounted to about 50 % of the preliminary estimate due to a more than 2-fold reduction in the useful length of the cooling fronts while achieving the goal of reducing sulfur dioxide emissions.

1. Akhmedyanova Z. I., Bobrova O. B., Ponomareva T. B. Reduction of hydrogen sulfide emissions during granulation of blast furnace slags. Nauchno-metodicheskiy elektronny zhurnal “Kontsept“. 2016. Vol. 11. pp. 1641–1645.
2. Proshkina O. B., Karbainova N. V. Sources of air pollution during slag processing. Teoriya i tekhnologiya metallurgicheskogo proizvodstva. 2010. No. 1. pp. 177–181.
3. Senik A. I., Milyukov S. V., Iroshkina O. B. Formation of hydrogen sulfide emissions during extra-furnace granulation of blast furnace slags. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova. 2008. No. 3 (23). pp. 75–79.
4. Romanenko A.G. Metallurgical slags. Moscow : Metallurgiya, 1977. pp. 97–100.
5. Akhmedyanova Z. I., Bobrova O. B. Options for reducing hydrogen sulfide emissions during granulation of blast furnace slags. Aktualnye problemy sovremennoy nauki, tekhniki i obrazovaniya. 2016. Vol. 1. pp. 228–230.
6. Bolotov V. A. Sorption purification of hydrogen sulfide-containing gases in the process of close-to-blast furnace granulation of slags: Dissertation … of Candidate of Engineering Sciences. Saint Petersburg, 2022. 172 p.
7. Filonenko A. V. Analysis of modern technologies for processing blast furnace slag. Ekologiya i promyshlennost. 2018. No. 3-4. pp. 91–104.
8. Panishev N. V., Bigeev V. A., Potapova M. V., Makarova I. V., Gavrilova T. O. Utilization of metallurgical production waste: monograph. Magnitogorsk : Izdatelstvo Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova, 2018. 69 p.
9. Chudakov F. Ya., Shkolnik Ya. Sh. Method of desulphurization of blast furnace slags. Author’s certificate No. 393319 A1 USSR, IPC C21C 7/064. Applied: 29.11.1971. Published: 10.08.1973.
10. Zolochevsky S. P., Mikhaleva M. A., Podlipenskaya L. E. Ecological assessment of hydrosphere pollution by discharges of a granulation plant. Ekologicheskiy vestnik Donbassa. 2023. No. 10. pp. 24-30.
11. Shipelnikov A. A., Tolmachev S. A. Research of the efficiency of suppression of hydrogen sulfide emissions during quenching of blast furnace slag. Vestnik Lipetskogo gosudarstvennogo tekhnicheskogo universiteta. 2025. No. 1 (58). pp. 56-63. DOI: 10.53015/30343275_2025_1_56
12. Vinogradov E. N., Dmitriev A. A., Klyukvin A. Yu. et. al. Method of processing liquid-molten blast-furnace slag. Patent RF, No. 2673688. Applied: 10.01.2018. Published: 29.11.2018.