Nosov Magnitogorsk State Technical University (Russia):

Chizhevskiy V. B., Doctor of Engineering Siences, Professor, Professor

Shavakuleva O. P., Ph. D. in Engineering Sciences, Associate Professor,

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

A possibility for reduction of titanium dioxide content in concentrates was studied, since its high content prevents processing of mediumtitanium grade magnetite ores. Taking into consideration inhomogeneous impregnation of minerals and their close interpenetration, in order to provide for more selective liberation of intergrowths, improve processing results and reduce grinding costs, ores softening prior to grinding is accomplished by means of magnetic pulse treatment. The studies were performed on the Kopanskoye and Maly Kuybas deposits mediumtitanium grade magnetite ores, located in the Chelyabinsk Region. Mass fraction of total iron in feed ores was 29.41 and 32.80 %, respectively, and that of titanium dioxide — 9.27 and 10.22 %. It was established, that treatment of the Kopanskoye deposit ore with intensity of 1.28·10³ kA/m results in increase of 0.071–0 mm size fraction content from 50.21 to 67.34 %, while further increase of intensity leads to only to a small gain in final size fraction production. Increasing duration of treatment to 4 min leads to increase of 0.071–0 mm size fraction content to 71.42 %. Magnetic pulse treatment increases grinding process rate, and necessary duration of grinding may be decreased by the factor of 1.64–1.51, depending on required grinding size. Wet magnetic separation of 0.071–0 mm size fraction, produced after magnetic pulse treatment and grinding, provides for titanium dioxide mass fraction reduction in magnetic product from 4.82 to 3.04 % with simultaneous increase of iron mass fraction from 60.11 to 63.95 %, as well as increase of iron recovery from 72.0 to 80.19 %. In treatment of the Maly Kuybas deposit ore, titanium dioxide mass fraction is reduced from 6.21 to 4.72 %, and that of iron is increased from 59.47 to 61.93 %. Magnetic pulse treatment provides for more complete and selective liberation of minerals intergrowths, permitting to process medium-titanium grade ores with mixing of produced concentrate to magnetite concentrate.

1. Yushina T. I., Petrov I. M., Avdeev G. I., Valavin V. S. Analysis of state-of-the-art in iron ore mining and processing in Russian Federation. Gornyi Zhurnal = Mining Journal, 2015, No. 1, pp. 41–47.
2. Kudrin N. A. Areas and resources of ilmenite and titanomagnetite ores of the Chelyabinsk region. Materialy nauchno-tekhnicheskoy konferentsii «Problemy kompleksnoy pererabotki titanomagnetitov Yuzhnogo Urala» (Materials of scientific and technical conf. «Problems of complex processing of titanomagnetite of the Southern Urals»), 28–29 March 2001. Magnitogorsk, 2001, pp. 30–34.

3. Gladskikh V. I., Grom S. V., Emelin K. A., Chizhevskiy V. B., Shavakuleva O. P. State and development prospects of the raw material base of Magnitogorsk Iron & Steel Work. Gornyi Zhurnal = Mining Journal, 2012, No. 3, Special issue, pp. 12–14.
4. Chyzhevsky V. B., Shavakuleva O. P., Gmyzina N. V. The enrichment of titaniferous magnetite ores in the South Urals. Vestnik of Nosov Magnitogorsk State Technical University, 2012, No. 2, pp. 5–7.
5. Vaisberg L. A., Zarogatskiy L. P., Turkin V. Ya. Vibratsionnyye drobilki. Osnovy rascheta, proektirovaniya i tekhnologicheskogo primeneniya (Vibrating mills. Bases for design, engineering and technological applications). St. Petersburg, VSEGEI, 2004, 306 pp.
6. Revnivtsev V. I., Gaponov G. V., Zarogatskiy L. P., Kostin I. M., Finkelshtein G. A., Khopunov E. A. Selektivnoye razrusheniye mineralov (The selective destruction of minerals). Under ed. of V. I. Revnivtsev. Moscow, Nedra, 1988, 286 pp.
7. Chanturiya V. A., Chaplygin N. N., Vigdergauz V. E. Resource-saving technologies of mineral processing and environmental protection. Gornyi Zhurnal = Mining Journal, 2007, No. 2, pp. 91–96.
8. Laskorin B. N., Barskiy L. A., Persits V. Z. Bezotkhodnaya tekhnologiya pererabotki mineralnogo syrya. Sistemnyy analiz (Wastefree technology of mineral processing. System analysis). Moscow, Nedra, 1984, 307 pp.
9. Samerkhanova A. S. Povysheniye effektivnosti primeneniya magnitoimpulsnoy obrabotki rud s tselyu ikh razuprochneniya pered izmelcheniyem. Avtoreferat dissertatsii ... kandidata tekhnicheskikh nauk (Improving the efficiency of magnetic pulse ores treatment for the purpose of their softening before grinding. Author's abstract of Ph. D. dissertation). Moscow, 2009, 20 pp.
10. Naumov K. I., Samerhanova A. S., Truba E. I., Haritonova N. V. The peculiarities of rock mass destruction exposed to magnetic and impulse treatment. Gorny Informatsionno-analiticheskiy Byulleten = Mining Informational and Analytical Bulletin, 2009, No. 3, pp. 153–157.
11. Azimov O. A. Povysheniye effektivnosti dezintegratsii mineralnogo syrya s ispolzovaniyem magnitoimpulsnoy obrabotki. Avtoreferat dissertatsii... kandidata tekhnicheskikh nauk (Improving the efficiency of minerals disintegration using magnetic pulse treatment. Author's abstract of Ph. D. dissertation). Moscow, 2009, 20 pp.
12. Azimov O. A. Prospects for increasing the efficiency of the milling complex in a closed circuit using magnetic-pulse treatment. Magnitno-impulsnaya obrabotka mineralnogo syrya dlya napravlennogo izmeneniya granulometricheskogo sostava (Magnetic-pulse treatment of mineral raw materials for directional changes in particle size distribution). Moscow, Gornaya kniga, 2009.
13. Bunin I. Zh. Teoreticheskiye osnovy vozdeystviya nanosekundnykh elektromagnitnykh impulsov na protsessy dezintegratsii i vskrytiya tonkodispersnykh mineralnykh kompleksov blagorodnykh metallov iz rud. Dissertatsiya... doktora tekhnicheskikh nauk (Theoretical basis of the nanosecond electromagnetic pulses impact on the processes of disintegration and disclosure of fine mineral complexes of precious metals from ores. Dr. of Engineering Sciences Dissertation). Moscow, 2009, 428 pp.
14. Chanturiya V. A., Bunin I. J., Kovalev A. T. Mechanisms of disintegration of mineral media exposed to high-power electromagnetic pulses. Proceeding of the International Conf. of Computational Methods. Singapore, NUS, 2004, p. 30.
15. Usov A. F., Tsukerman V. A. Electric pulse processes for processing of mineral raw materials: energy aspect. Proceeding of the XXIII International Miners Processing Congress. Turkey, Promed Advertising Agency, 2006, Vol. 3, pp. 2084–2087.
16. Goncharov S. A. Fiziko-tekhnicheskiye osnovy resursosberezheniya pri razrushenii gornykh porod (Physical and technical resource saving bases in rock destruction). Moscow, MGGU (Moscow State Mining University), 2007, 211 pp.
17. Goncharov S. A., Ananyev P. P., Ivanov V. Yu. Razuprochneniye gornykh porod pod deystviyem impulsnykh elektromagnitnykh poley (Softening of rocks under the influence of pulsed electromagnetic fields). Moscow, MGGU, 2006, 91 pp.
18. Progressivnyye tekhnologii kompleksnoy pererabotki mineralnogo syrya. Pod redaktsiyey V. A. Chanturiya (The progressive technologies of the complex mineral raw materials processing. Under ed. of V. A. Chanturiya). Moscow, «Ore and Metals» Publishing house, 2008, 283 pp.
19. Cabri L. J., Rudashevsky N. S., Rudashevsky V. N., Gorkovetz V. Ya. Study of native gold from the Luopensulo deposit (Kostomuksha area, Karelia, Russia) using a combination of electric pulse disaggregation (EPD) and hydroseparation (HS). Minerals Engineering, 2008, Vol. 21, Iss. 6, pp. 463–470.
20. Khopunov E. A. Selektivnoye razrusheniye mineralnogo i tekhnogennogo syrya (The selective destruction of mineral and technogenic raw materials). Ekaterinburg, UIPTs, 2013, 429 pp.
21. Sih G. G., Chen E. P. Effect of material inhomogeneity on crack propagation characteristics. Eng. Fract. Mech., 1980, Vol. 30, No. 3, pp. 431–438.
22. Viola E., Piva A. Plain strain interfacial fracture analysis of bimaterial incompressible body. Eng. Fract. Mech., 1981, Vol. 15, No. 1, pp. 131–142.
23. Krstic V. D., Vlajic M. D. Condition for spontaneous cracking of a brittle matrix due to the presence of thermoelastic stresses. Acta Metall., 1983, Vol. 31, No. 1, pp. 139–144.
24. Wonnacott G., Wills B. A. Optimization of thermally assisted liberation of a tin ore with the aid of computer simulation. Minerals Engineering, 1990, Vol. 3, Iss. 1–2, pp. 187–198.
25. King R. P. A model for the quantitative estimation of mineral liberation by grinding. Int. J. Miner. Process., 1979, Vol. 6, pp. 207–220.
26. Chanturiya V. A., Bunin I. J., Lunin V. D. Non-traditional methods of disintegrations and liberating resistant gold-bearing minerals. Theory and technological results. Eurasian Mining, 2006, No. 2, pp. 36–43.
27. Chanturiya V. A. Innovation processes in technologies for the processing of refractory mineral raw materials. Geology of Ore Deposits, 2008, Vol. 50, No. 6, pp. 491–501.
28. Pat. 2301708 RU.
29. Taylor P. R., Vidal E. E., Shuey S. A., Gomez J. C. Extractive metallurgy of vanadium-containing titaniferous magnetite ores: a review. Minerals & Metallurgical Processing, 2006, Vol. 23, No. 2, pp. 80–86.
30. Mehdilo A., Irannajad M., Rezai B. Chemical and mineralogical composition of ilmenite: Effects on physical and surface properties. Minerals Engineering, 2015, Vol. 70, pp. 64–76.