Abstract
We study a mechanism for maintaining the strength of cement-bonded iron-oxide-bearing briquets when heated under reducing conditions. These briquets retain their strength when heated in a reducing atmosphere: up to 700–750°C, strength retention is due to the cement stone; strength retention under further heating is due to the continuous metal shell formed on the surface of the briquet as the iron oxide in the surface layer of the briquet is reduced to iron. Fabrication and usage of briquets of iron-ore concentrate can be recommended as a wash material for blast furnaces. Disperse materials containing SiO2 and MgO should be added to the charge during fabrication of the briquets in order to improve the washing properties of briquet slag.
Similar content being viewed by others
References
A. S. Belkin, Yu. S. Yusfin, I. F. Kurunov, et al., “Use of iron-coke briquets on a cement binder in blast-furnace smelting,” Metallurg, No. 4, 39–41 (2003); Metallurgist, 47, 147–152 (2003).
M. P. Landow, M. I. Crawford, and M. Martinez, “Benefits of recycling blast furnace waste materials at National Steel — Great Lakes Division by cold bonded briquetting,” in: Proceedings of the 59th Ironmaking Conference, Pittsburgh, March 26–29, 2000, pp. 225–231 (2000).
Maneesh Singh and Bo Björkman, “Swelling behavior of cement-bonded briquets,” in: Proceedings of the Third International Conference on Science and Technology of Ironmaking, Düsseldorf, June 16–20, 2003, pp. 359–364 (2003).
C. Bartels-von Varnbuler et al., “Recycling technologies for filter dust and other residues,” Millennium Steel, 62–68 (2004).
I. F. Kurunov, V. M. Kukartsev, I. S. Yarikov, et al., “Use of briquets of iron-and zinc-bearing sludge in the blast-furnace charge,” Metallurg, No. 10, 36–38 (2003); Metallurgist, 47, 396–400 (2003).
M. Peters, P. Schmole, K. Kesseler, and L. Stahl, “Oxygen cupola for recycling waste oxides from an integrated steel plant,” in: Proceedings of the Third Int. Conf. on Science and Technology of Ironmaking, Dusseldorf, June 16–20, 2003, pp. 349–352 (2003).
I. F. Kurunov, V. M. Kukartsev, I. S. Yarikov, et al., “Recycling of iron-bearing slurries by pelletization and blast-furnace smelting at NLMK Joint Stock Company,” Stal’, No. 10, 15–19 (2003).
I. F. Kurunov and O. G. Bolshakova, “Briquets for washing blast furnaces,” Metallurg, No. 5, 46–50 (2007); Metallurgist, 51, 253–261 (2007).
I. F. Kurunov, É. M. Shcheglov, and V. L. Emel’yanov, “Washing the hearth of blast furnaces with briquets made from scale,” Metallurg, No. 6, 36–39 (2007); Metallurgist, 51, 306–311 (2007).
Yu. M. Butt, M. M. Sychev, and V. V. Timashev, Chemical Technology of Binders: A University Textbook [in Russian], Vysshaya Shkola, Moscow (1980).
Yu. M. Butt and V. V. Timashev, Portland Cement (Mineralogical and Granulometric Composition, Modification and Hydration Processes) [in Russian], Stroiizdat, Moscow (1974).
Author information
Authors and Affiliations
Additional information
__________
Translated from Metallurg, No. 10, pp. 41–46, October, 2007.
Rights and permissions
About this article
Cite this article
Kurunov, I.F., Malysheva, T.Y. & Bol’shakova, O.G. A study of the phase composition of iron-ore briquets to assess their behavior in a blast furnace. Metallurgist 51, 548–557 (2007). https://doi.org/10.1007/s11015-007-0101-6
Issue Date:
DOI: https://doi.org/10.1007/s11015-007-0101-6