Technological modes of efficient metallization of iron-oxide-containing waste from metallurgical production
https://doi.org/10.17073/0368-0797-2020-5-335-343
Abstract
During the research, rolled scale and gas cleaning slimes from oxygen-converter workshop No. 1 of JSC “EVRAZ ZSMK” were used as iron-oxide-containing materials. Semi-coke from brown coals of the Berezovskoye deposit of the Kansko-Achinsk basin (temperature of semi-coking is 750 °C), coke fines of PJSC “Coke” and dust from coke dry-quenching plant of JSC “EVRAZ ZSMK” were used as carbon reducing agents. Total iron, FeO and Fe2 O 3 oxides amount to 73.3, 75.5 and 20.9 % in scale, 41.2, 4.7 and 53.7 % in sludge, respectively. Sludge also contains 4.3 % of total carbon and 20.6 % of CaO. Brown-coal semi-coke, coke fines and coke dust contains carbon and volatiles 94.05 and 9.5 %, 97.50 and 2.1 %, 97.47 and 1.6 % on dry ashless weight, respectively. For metallization of furnace charges with composition: scale, slime–semi-coke, coke fines, dust with addition of 10 % water-soluble binding–molasses, strong unroasted briquettes were pressed. Metallization modes of analyzed charge compositions were thermodynamically predicted and technologically determined. Metallization degree and metal iron content at usage of brown-coal semi-coke were found to be 97.5 and 90.2 % for scale, 97.5 and 71.3 % for sludge; of coke fines: 70.7 and 61.9 % for scale, 68.9 and 48.4 % for sludge; of coke dust: 72.1 and 62.6 % for scale, 69.2 and 48.2 % for sludge. The possibility of achievement the metallization degree of 97.0 – 98.0 % was established for briquetted charge from scale – brown-coal semi-coke with 92.0 – 93.0 % of total iron, 89.8 – 90.6 % of metallic iron, 2.8 – 3.2 % of FeO, 0.06 – 0.08 % of S, 0.016 – 0.018 % of P, 1.7 – 1.9 % of C, 1.0 – 1.2 % of CaO and 0.25 – 0.35 % of MgO at 1173 K and duration of 40 min.
About the Authors
A. E. Anikin
Siberian State Industrial University
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair “NonFerrous Metallurgy and Chemical Engineering”
Novokuznetsk, Kemerovo region
G. V. Galevskii
Siberian State Industrial University
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Head of the Chair “NonFerrous Metallurgy and Chemical Engineering”
Novokuznetsk, Kemerovo region
V. V. Rudneva
Siberian State Industrial University
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Non-Ferrous Metallurgy and Chemical Engineering”
Novokuznetsk, Kemerovo region
References
1. Lyungen Kh.B., Peters M., Shmele P. Production of pig iron. Chernye metally. 2010, no. 9, pp. 52–66. (In Russ.).
2. Yusfin Yu.S., Pashkov N.F. Metallurgiya zheleza [Iron metallurgy]. Moscow: Metallurgiya, 2007, 320 p. (In Russ.).
3. Kirschen M., Badr K., Pfeifer H. Influence of direct reduced iron on the energy balance of the electric arc furnace in steel industry. Energy. 2011, vol. 36, no. 10, pp. 6146–6155.
4. Takamatsu N., Nobuhiko T., Hatanaka A., Kaku H., Saitoh G. Development of iron-making technology. Nippon Steel Technical Report. 2012, no. 101, pp. 79–88.
5. Dinel’t V.M., Strakhov V.M., Livenets V.I., Nikishanin M.S., Anikin A.E., Surovtseva I.V. Production of unroasted briquets based on small lignite semicoke particles from Kansko-Achinsk coal. Coke and Chemistry. 2008, vol. 51, no. 9, pp. 370–375.
6. Dinel’t V.M., Anikin A.E., Strakhov V.M. Reduction of iron ore by means of lignite semicoke. Coke and Chemistry. 2011, vol. 54, no. 5, pp. 165–169.
7. Zhang Yang, Man Rui-lin, Ni Wang-dong, Wang Hui, Selective leaching of base metals from copper smelter slag. Hydrometallurgy. 2010, vol. 103, no. 1-4, pp. 25–29.
8. Zhang Y.Y. Development prospect of rotary hearth furnace process in China. Advanced Materials Research. 2013, vol. 746, pp. 533–538.
9. Nokhrina O.I., Rozhihina I.D., Hodosov I.E. The use of coal in a solid phase reduction of iron oxide. IOP Conference Series: Materials Science and Engineering. 2015, vol. 91, no. 1, article 012045.
10. Golodova M.A., Rozhihina I.D., Nоkhrina O.I., Rybenko I.A. A study on reduction processes of elements in the system V2 O 5 – Si. IOP Conference Series: Materials Science and Engineering. 2016, vol. 150, no. 1, article 012006.
11. Wiesinger H. Status, realized improvements and future potentials of the Corex technology. Stahl und Eisen. 2002, vol. 122, no. 6, pp. 23–28.
12. Tsymbal V.P., Kozhemyachenko V.I., Ryabenko I.A. etc. Background and principles of self-organizing jet-emulsion metallurgical unit. IOP Conference Series: Materials Science and Engineering. 2016, vol. 150, no. 1, article 012018.
13. Rovin S.P., Kalinichenko A.S., Rovin L.E. Return of dispersed metal waste to production. Lit’e i metallurgiya. 2019, no. 1, pp. 45–48. (In Russ.).
14. Anikin A.E., Galevskii G.V., Rudneva V.V. Study of physicochemical characteristics of iron-oxide-containing technogenic raw materials. Chernaya metallurgiya. Byul. in-ta “Chermetinformatsiya”. 2018, no. 9, pp. 107–112. (In Russ.).15. Digonskii S.V., Ten V.V. Neizvestnyi vodorod [Unknown hydrogen].
15. St. Petersburg: Nauka, 2006, 292 p. (In Russ.).
16. Digonskii S.V. Gazofaznye protsessy sinteza i spekaniya tugoplavkikh veshchestv (karbid kremniya, pirografit, almaz, kubicheskii nitrid bora) [Gas-phase processes of synthesis and sintering of refractory substances (silicon carbide, pyrographite, diamond, cubic boron nitride)]. Moscow: GEOS, 2013, 464 p. (In Russ.).
17. Vyatkin G.P., Mikhailov G.G., Kuznetsov Yu.S., Kachurina O.I. System analysis of iron oxides reduction in atmosphere of water gas in presence of carbon. Vestnik YuUrGU. Metallurgiya. 2012, no. 15, pp. 53–59. (In Russ.).
18. Yakushevich N.F., Strokina I.V., Polyakh O.A. Thermodynamic laws of phase-chemical equilibrium in the Fe – C – O2 – H2 system. Izvestiya. Ferrous Metallurgy. 2012, no. 4, pp. 9–17. (In Russ.).
19. Yakushevich N.F., Strokina I.V., Polyakh O.A. Determination of parameters of redox processes in Fe – C – O2 – H2 system. Izvestiya. Ferrous Metallurgy. 2011, no. 8, pp. 13–18. (In Russ.).
20. Vershinin V.I., Pertsev N.V. Planirovanie i matematicheskaya obrabotka rezul’tatov khimicheskogo eksperimenta [Planning and mathematical processing of results of a chemical experiment]. Omsk: Izd-vo OmGU, 2005, 108 p. (In Russ.).
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For citations:
Anikin A.E., Galevskii G.V., Rudneva V.V. Technological modes of efficient metallization of iron-oxide-containing waste from metallurgical production. Izvestiya. Ferrous Metallurgy. 2020;63(5):335-343. (In Russ.) https://doi.org/10.17073/0368-0797-2020-5-335-343
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