| Implementation of BF Technology with co-injection of natural gas and PCI at NLMK, Russia Sergei Filatov1; Yakov Gordon2; Sergei Zagainov3; Sergei Myasoedov4; Andrei Sorokin5; Vladislav Listopadov5; Sergei Grachev5; 1NOWO-LIPETS IRON & STEEL WORKS, Lipets, Russian Federation; 2HATCH, Mississauga, Canada; 3URAL FEDERAL UNIVERSITY, Ekaterinburg, Russian Federation; 4NLMK, RUSSIA, Lipetsk, Russian Federation; 5NLMK, Lipetsk, Russian Federation; PAPER: 49/Iron/Regular (Oral) SCHEDULED: 16:20/Mon. 28 Nov. 2022/Arcadia 1 ABSTRACT: <p>Based on the result of theoretical analysis, it has been shown that injection of pulverized coal supports process conditions either to provide higher smelting rate or achieve minimum coke specific consumption. In case of coke and natural gas replacement, two conflicting factors can be observed: gas amount per minute is reduced thus having a favorable effect on gas dynamics both at upper and lower zones of the furnace; porosity is decreased in slag formation zone. It determines extreme correlation between PCI (pulverized coal injection) consumption and blast furnace performance. It has been established that increasing ratio of PCI to natural gas (NG) consumption is followed by lower coke and total carbon in fuel specific consumption at slowdown. High smelting rate can be achieved with this ratio within the range of 2.0-2.5. Mathematical modelling also revealed that the replacement coefficient of coke by NG increases in average by 0.09 kg of coke per Nm3 of NG with PCI rate with increase accompanied by simultaneous reduction in NG rate. The overall consumption carbon consumption was reduced despite the difference in carbon amount entering the furnace with PCI and NG.</p> References: <p>1. Bermes, P.; Olszar R.; Hlisnikowski, K.; Faruzel P.: Operational Benefit and Cost Saving through PCI Application at the Blast Furnaces of Třinecké železárny; METEC & 2nd ESTAD, 2015, Düsseldorf.<br />2. Schott, R.: Optimization strategies for pulverized coal injection into the blast furnace. stahl und eisen 136, 2016, Nr.3, p. 39-47.<br />3. Filatov S., Zagainov S, Gileva L. a.o. Evaluation of effectiveness of hot metal production in blast furnace. Izvestia Vuzov, Ferrous Metallurgy, 2017. V. 60. № 8. p.p. 637-642.<br />4. Filatov S, Vlasov V a.o. First results of PCI injection in blast furnace. Metallurg, 2014. № 9. p.p. 60-63<br />5. Filatov S, Myasoedov S, Titov V. a.o. Improvement of blast furnace operation with PCI at blast furnace shop No.1 at NLMK. Izvestia Vuzov, Ferrous Metallurgy. 2018. № 7 (1423). p.p. 33-39</p> |
