Journals →  Chernye Metally →  2016 →  #9 →  Back

Steelmaking
ArticleName Development of high-efficient technologies of deep processing and comprehensive utilization of steel slags
ArticleAuthor V. B. Chizhevskiy, I. A. Grishin, O. P. Shavakuleva
ArticleAuthorData

Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia):

Chizhevskiy V. B., Dr. Eng., Chair of Geology, Mine Surveying and Mineral Processing
Grisin I. A., Cand. Eng., Ass. Prof., Chair of Geology, Mine Surveying and Mineral Processing
Shavakuleva O. P., Cand. Eng., Ass. Prof., Chair of Geology, Mine Surveying and Mineral Processing

E-mail (common): magtu_opi@mail.ru

Abstract

Metallurgical enterprises of the southern Urals are experiencing an acute deficit of iron ore. Particularly difficult situation at Magnitogorsk Iron and Steel Works, as the main deposit was worked out, and acting career has low productivity. Processing of tailings in the amount of 10 million tons per year generates about 1 million tones of iron-containing products for the steel industry. The completeness of iron extraction in magnetic products does not exceed 35–37% because of low efficiency technologies. No operations of deep processing non-magnetic product and process crushing and grinding to liberate iron pellet does not allows to improve the quality of magnetic products and get low iron non-magnetic products for a wide applications. Low efficiency of the slag processing particle with size 10–0 mm has been testified, the number of which slags in the original slag reaches 50–55%. The study was performed at integrated laboratory facilities for crushing, dry magnetic separation, grinding and separation in a suspended state. Tubular magnetic analyzer 170Т-SE, mechanical shaker for sieving samples and the microscope Siams Photolab have been used. The processing technology for all non-magnetic products has been developed; it allows us to obtain magnetic and non-magnetic low iron products with higher quality. used The new method of separation in suspended state has been used for processing of small slag, and the technology for their enrichment in a closed loop has been developed. This technology ensures quality improvement of magnetic product. Possibility of sand replacing by low-iron non-magnetic product in a mixture for laying-out the worked space in underground mining has been studied, and the prospects of its application with simultaneous reducing of cement consumption by 30–35% is displayed. The developed technology of deep processing allows to increase the completeness of extraction of iron by 30.3 % and production of magnetic products by 18.1% with a higher iron mass fraction in them. Low iron non-magnetic products are prospective for mixes preparing in stowing of worked space during underground mining of mineral resources.

keywords Steelmaking slag, magnetic separation, crushing, grinding, magnetic products, non-magnetic products, stowing mixture
References

1. T. I. Yushina, I. M. Petrov, G. I. Avdeev, V. S. Valavin. Analiz sovremennogo sostoyaniya dobychi i pererabotki zheleznykh rud i zhelezorudnogo syrya v Rossiyskoy Federatsii (Analysis of state-of-theart in iron ore mining and processing in Russian Federation). Gornyi Zhurnal = Mining Journal. 2015. No. 1. pp. 41–47.
2. V. I. Gladskikh, S. V. Grom, K. A. Emelin, V. B. Chizhevskiy, O. P. Shavakuleva. Sostoyanie i perspektivy razvitiya syrevoy bazy otkrytogo aktsionernogo obshchestva «Magnitogorskiy metallurgicheskiy kombinat» (State and development prospects of the raw material base of Magnitogorsk Iron & Steel Works). Gornyi Zhurnal. Chernye metally. Spetsialnyy vypusk = Mining Journal. Ferrous metals. Special issue. 2012. pp. 12–14.
3. M. Reuter, Y. Xiao, U. Boin. Recycling and environmental issues of metallurgical slags and salt fluxes. VII International Conference on Molten Slags Fluxes and Salts, The South African Institute of Mining and Metallurgy. 2004. pp. 349–356.
4. U. Schamari. Ekonomicheskiy aspekt: zashchita okruzhayushchey sredy i resursov blagodarya shlakam chernoy metallurgii (Environment protection and resource saving owing to iron and steel slags: an economical aspect). Chernye metally = Ferrous metals. 2015. No. 7. pp. 54–56.
5. Irem Zeynep Yildirim, Monica Prezzi. Use of steel slag in subgrade applications. Final Report joint transportation research program. FHWA/IN/JTRP. 2009/32.
6. S. Kumar, R. Kumar, A. Bandopadhyay, T. C. Alex, R. B. Kumar, S. K. Das, S. P. Mehrotra. Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of Portland slag cement. Cement and Concrete Composites. 2008. Vol. 30, No. 8. pp. 679-685.
7. T. Merkel. Erzeugung und Nutzung von Produkten aus Eisenhüttenschlacke. FEhs-Institut Für Baustoff -Forschung, Duisburg. 2012. No. 1. S. 19.
8. T. F. Kim, N. V. Sukinova, T. A. Kurgan, N. S. Ignateva. Pererabotka metallurgicheskikh shlakov MMK (Processing of metallurgical slags of Magnitogorsk Iron and Steel Works). Stal = Steel in Translation. 2004. No. 12. pp. 114–116.
9. V. B. Chizhevskiy, O.P . Shavakuleva, E. Yu. Degodya, N. A. Sedinkina. Glubokaya pererabotka staleplavilnykh shlakov (Deep processing of steel-smelting slags). Stal = Steel in Translation. 2014. No. 4. pp. 124–126.
10. V. B. Chizhevskiy, R. S. Takhautdinov, I. P. Zakharov. Ustroystvo dlya izvlecheniya magnitnykh chastits iz sypuchego materiala (Unit for extraction of magnetic particles made of grinding material). Utility moel certificate RF, No. 26450. IPC 7 V 03 S 1/18. Bulletin “Inventions. Utility models” (BIPM). 2002. No. 34. p. 390.
11. I. P. Zakharov. Povyshenie effektivnosti obogashcheniya staleplavilnykh shlakov za schet primeneniya sukhoy magnitnoy separatsii vo vzveshennom sostoyanii : Dissertatsiya … kandidata tekhnicheskikh nauk (Increasing of efficiency of steel-smelting slags concentration at the expense of suspended dry magnetic separation : Dissertation … of Candidate of Engineering Sciences). Magnitogorsk, 2004. p. 165.
12. Rigby, G. D. Bast furnace slag utilization in mine backfill: implications for sustainable development and greenhouse gas reduction, Greenhouse gases in the metallurgical industries. G. T. Rigby, L. I. Wibberley, H. T. Cao. Policies, Abatement and Treatment, 40th Annual Conference of Metallurgists of CIM, Toronto, Canada, 26–29 August 2001. pp. 227–238.

Language of full-text russian
Full content Buy
Back