Study of the process of metal-thermal reduction of boron from the slag of the system CaO-SiO2-MgO-Al2O3-B2O3

V. I. Zhuchkov, V. A. Salina, A. V. Sychev

Abstract


The results of thermodynamic modeling of the effect of aluminum (0.005–0.1%) contained in the metal at constant silicon concentrations (0.2%) and carbon (0.1%) on the boron reduction process from the slag of the system CaO-SiO2-MgO-Al2O3-B2O3 basicity (CaO)/(SiO2) equal to 5 in the temperature range 1400–1700 0C in steps of 50 0C are presented. For modeling, the software complex HSC Chemistry 6.12 developed by Outokumpu Research Oy (Finland) was used. The calculations using the Equilibrium Compositions module at a gas-phase pressure of 1 atm, containing 2.24 m3 of N2 (gas) as a neutral additive were performed. The obtained simulation results indicate the thermodynamic possibility of boron reduction from the slag of the CaO-SiO2-MgO-Al2O3-B2O3 system by silicon and aluminum, whose concentration in the metal is insignificant – 0.2 and 0.005-0.1%, respectively. It was found that an increase in the initial aluminum content in the steel promotes an increase in the concentration of reduced boron in the metal with a content of 4% B2O3 and a given temperature. Thus, at a process temperature of 1650 0C, an increase in the initial aluminum content from 0.005 to 0.1% made it possible to increase the boron concentration in the metal by 28.5%. The results of thermodynamic modeling characterizing the effect of temperature on the degree of boron reduction at different aluminum contents are presented. Experiments on the inter-phase distribution of boron between the slag of the CaO-SiO2-MgO-Al2O3-B2O3 system and the metal were carried out in a high-temperature Tamman resistance furnace. Low-carbon steel containing 0.005% Al was used. It was shown that aging of the metal under the slag containing 4.3% of B2O3 is accompanied by reduction of boron, the amount of which in the finished steel is 0.0089%. The coefficient of boron assimilation (KB) is 5.8%, which is in principle correlated with the results of thermodynamic modeling. The obtained results of thermodynamic modeling and experimental data showed that it is possible in principle to directly microlite boron steel by reducing it with aluminum and silicon contained in the metal

Full Text:

PDF

References


V.I. Zhuchkov, A.A. Akberdin, N.A. Vatolin et al. Application of boron-containing materials in metallurgy, Russian metallurgy (Metally), 2011, vol. 2011, no.12, pp. 1134-1137. DOI: 10.1134/S003602951112024X

Tao Pan, Xiaoyong Wang, Hang Su, Caifu Yang Effect of alloying element Al on hardenabilitity and mechanical properties of micro-B treated ultra-heavy plate steels, Acta metallurgica sinica, 2014, vol. 50, no.4, pp. 431-438.

Velichko O.G., Kamkin L.V., Manidin V.S. et al. The role of boron in the processes of obtaining a qualitative and problem of its determination [Rol' boru v protsesakh otrimannya yakisno? stali i problemi yogo viznachennya], Teoriya i praktika metallurgii [Theory and Practice of Metallurgy], 2015, no.1-2, pp. 104-108. (in Uk.)

Dergach T.A. The influence of boron on the microstructure and properties of pipes from low-carbon austenitic chromium-nickel steel [The influence of boron on the microstructure and properties of pipes from low-carbon austenitic chromium-nickel steel], Problems of Atomic Science and Technology [Problems of Atomic Science and Technology], 2005, no.5 (88), pp. 80-86. (in Russ.)

Wan Yong, Weiqing Chen Effect of boron content on the microstructure and magnetic properties of non-oriented electrical steels, J. Wuhan Univ. Technol. Mater. Sci. Ed., 2015, vol. 30, no.3, pp. 574-579. DOI: 10.1007/s11595-015-1191-9

Salzgitter: Stahlwerkstoff f?r den Extremfall, Stahl und Eisen, 2015, vol. 135, no.4, p. 33.

Lyakishev N.P., Pliner Yu.L., Lappo S.I. Borsoderzhashchie stali i splavy [Boron steels and alloys], Moscow, Metallurgy, 1986, 192 p. (in Russ.)

Ershov G.S., Bychkov Yu.B. Fiziko-khimicheskie osnovy ratsional'nogo legirovaniya stali i splavov [Physical and chemical bases of rational alloying of steel and alloys], Moscow, Metallurgy, 1982, 360 p. (in Russ.)

Heckmann C.J., Ormston D., Grimpe F. et. al. Development of low carbon Nb-Ti-B microalloyed steels for high strength large diameter linepipe, Iron and Steelmaking, 2005, no.4, pp. 57-60. DOI: 10.1179/174328105X48034

Asahi H., Haar T., Tzuru E. et al. Development of ultra-high-strength pipes X120 UEO [Razrabotka ul'travysokoprochnykh trub X120 UEO], Sb. dokl. Mezhdunarodnogo seminara "Sovremennye stali dlya gazonefteprovodnykh trub, problemy i perspektivy" [Collection of articles. report International Seminar "Modern steel for gas-oil-conducting pipes, problems and prospects", (Moscow, March 15-16, 2006), Moscow, 2006, pp. 123-130. (in Russ.)

Upadhyaya N., Pujara M.G., Sakthivelb T. et al. Effect of Addition of Boron and Nitrogen on the Corrosion Resistance of Modified 9Cr -1Mo Ferritic Steel, Procedia Engineering, 2014, no.86, pp. 606-614. DOI: 10.1016/j.proeng.2014.11.086

Ya-long Zhang, Ying-yi Zhang, Fei-hua Yang, Zuo-tai Zhang. Effect of alloying elements (Sb, B) on recrystallization and oxidation of Mn-containing IF steel, Journal of iron and steel research international, 2013, vol. 20, no.3, pp. 39-44. DOI: 10.1016/S1006-706X(13)60067-9

Wang H., Zhang T., Zhu H. et al. Effect of В2О3 on melting temperature, viscosity and desulfurization capacity of CaO-based refining flux, ISIJ International, 2011, vol. 51, no.5, pp. 702-706. DOI: 10.2355/isijinternational.51.702

Chul Kyung Cho, Dong Jun Mun, Yang Mo Koo, Jae Sang Lee. Effect of niobium and titanium addition on the hot ductility of boron containing steel, Materials Science and Engineering A, 2011, vol. 528, no.10-11, pp. 3556-3561. DOI: 10.1016/j.msea.2011.01.097

Lopez-Chipres E., Mejia I., Maldonado C. et al. Hot flow behavior of boron microalloyed steels, Materials Science and Engineering A, 2008, vol. 480, no.1-2, pp. 49-55. DOI: 10.1016/j.msea.2007.06.067

Stumpf W., Banks K. The hot working characteristics of boron bearing and conventional low carbon steel, Materials Science and Engineering A, 2006, vol. 418, no.1-2, pp. 86-94. DOI: 10.1016/j.msea.2005.11.020

Stepanov A.I., Babenko A.A., Sychev A.V. et al. Testing the technology of micro-alloying of boron steel using ferrosilicon [Otrabotka tekhnologii mikrolegirovaniya stali borom s ispol'zovaniem ferrosilikobora], Metallurg, 2014, no.7, pp. 50-52. (in Russ.)

Mikhailov G.G., Makrovets L.A., Smirnov L.A. Thermodynamic analysis of the reaction of the interaction of manganese, silicon, magnesium, calcium, aluminum with oxygen in a boron-containing iron-based melt, Bulletin of the South Ural State University. Series "Metallurgy", 2015, vol. 15, no.2, pp. 5-12. (in Russ.)

Jakobsson Lars Klemet, Merete Tangstad. Distribution of boron between silicon and CaO-MgO-Al2O3-SiO2, Metallurgical and Materials Transactions, B, 2014, vol. 45B, no.5, pp. 1644-1655. DOI: 10.1007/s11663-014-0088-x

Sychev A.V., Salina V.A., Babenko A.A., Zhuchkov V.I. Distribution of boron between oxide slag and steel, Steel in Translation, 2017, vol. 47, no.2, pp. 105-107. DOI: 10.3103/S0967091217020127

Salina V.A., Sychev A.V., Zhuchkov V.I., Babenko A.A. Thermodynamic modeling of metal desulfurization with boron -containing slags of the CaO-SiO2-MgO-Al2O3-B2O3 system, Steel in Translation, 2017, vol. 47, no.12, pp. 768-771. DOI: 10.3103/S0967091217120117

Roine A. Outokumpu HSC Chemistry for Windows. Chemical reactions and Equilibrium software with extensive thermochemical database, Pori, Outokumpu research OY, 2002.

Gasik M.I., Lyakishev N.P. Teoriya i tekhnologiya elektrometallurgii ferrosplavov: ucheb. dlya vuzov [Theory and technology of electrometallurgy of ferroalloys: a textbook for universities], Moscow, SP Intermet Engineering, 1999, 764 p. (in Russ.)




DOI: http://dx.doi.org/10.24892/RIJIE/20180405

Refbacks

  • There are currently no refbacks.


Copyright (c) 2019 V. I. Zhuchkov, V. A. Salina, A. V. Sychev

© Russian Internet Journal of Industrial Engineering. ISSN 2310-0818

E-mail: indust.engineering.ru@gmail.com

Another version of the web site: http://indust-engineering.ru