Issues of resource and energy saving in corundum production

The purpose of this article is study and identification of the most promising trends and engineering solutions in order to improve resource saving and energy efficiency in the production of corundum on the basis of the conducted patent review on melting improvement and optimization. The ways to optimize the corundum production are considered in three directions from the point of view of energy saving. The first direction relates to the development of promising engineering developments. The latter are studied to select rational operating modes and determine the main factors affecting voltage surges during the technological process and useful product yield. Consideration is given to the conditions for reducing specific energy consumption and improvement of production environmental friendliness at all stages beginning from isothermal sintering of corundum, production of electrocorundum, fine corundum to single corundum crystals. The second direction is the optimization of corundum production at all stages for the development of an optimal control algorithm for the technological process. In this case the electricity consumption might be reduced by 10-12% as compared to current standards. The third direction is the development of engineering solutions involving the change of individual structural units of furnaces, namely, the use of modern components and new heat insulating materials, as well as the application of spent heat carriers as the sources of secondary energy resources and the introduction of additional controllers of the automated control system of the process. The analytical study has shown that the result of optimization should be upgraded designs of plants and electrical equipment, which can provide maximum electrochemical efficiency, and corresponding furnace tightness. Criteria for energy supply and energy quality making possible to stabilize furnace material balance and solve resource saving issues have been developed. These measures allow to reduce the loss of raw materials up to 20-25%, the specific energy consumption under the production of corundum by 2-3 thousand kWh per 1 t.

1. Niżankowski C. Manufacturing sintered corundum abradants. Archives of Civil and Mechanical Engineering. 2002;2:53–64. https://doi.org/10.1007/s00170-014-6090-2

2. Zeidler S, Posch Th, Mutschke H. Mid-infrared properties of corundum, spinel, and α-quartz, potential carriers of the 13 μm feature. Asronomy and Astrophysics. 2013;553. https://doi.org/10.1051/0004-6361/201220459

3. Bogdanov SP, Garshin AP, Sychev MM. Armor ceramics based on corundum core-shell powders. In: Poroshkovaya metallurgiya: inzheneriya poverhnosti, novye poroshkovye kompozicionnye materialy. Svarka: sbornik dokladov XI Mezhdunarodnogo simpoziuma = Powder Metallurgy: Surface Engineering, New Powder Composite Materials. Welding: collected reports of XI International symposium: 10–12 April 2019, Minsk. Minsk: Belorusskaya nauka; 2019, part. 1, р. 424–430.

4. Nadolny K. State of the art in production, properties and applications of the microcrystalline sintered corundum abrasive grains. International Journal of Advanced Manufacturing Technology. 2014;74:1445–1457. https://doi.org/10.1007/s00170-014-6090-2

5. Danchevskaya MN, Ivakin YuD, Bagdasarov ChS, Antonov EV, Kostomarov DV, Panasyuk GP. Synthetic finecrystalline corundum – new raw material for leucosapphire single crystals growth. Perspektivnye materialy. 2009;4:28–33. (In Russ.)

6. Li Zi-cheng, Li Zhi-hong, Zhang Ai-ju, Zhu Yu-mei. Influence of thermal treatment conditions on twodimensional crystal growth of nanocrystal corundum abrasives. Materials Research Bulletin. 2009;44(4):762–767. https://doi.org/10.1016/j.materresbull.2008.09.026

7. Mccormick M. Asia-Pacific leading world’s corundum production. Available from: https://www.indmin.com/Article/3499879/Regulation-LatestNews/Asia-Pacific-leading-worlds-corundumproduction.html [Accessed 07th August 2020].

8. Klyuev RV, Bosikov II, Alborov AD. Research and mathematical modeling of the thermal and power performance of resistance furnaces at metallurgical enterprises. Lecture Notes in Electrical Engineering. 2020;641:630– 636. http://doi.org/10.1007/978-3-030-39225-3_69

9. Zhukovskiy YL, Sizyakova EV. The introduction of the system of energy saving and energy efficiency at the enterprises of metallurgy. Zapiski Gornogo Instituta. 2013;202:155–160. (In Russ.)

10. Pingin VV, Tretyakov YaA, Radionov EYu, Nemchinova NV. Modernization prospects for the bus arrangement of electrolyzer S-8BM (S-8B). Tsvetnye metally. 2016;3:35–41. (In Russ.) http://doi.org/10.17580/tsm.2016.03.06

11. Shakhrai SG, Nemchinova NV, Kondrat’ev VV, Mazurenko VV, Shcheglov EL. Engineering solutions for cooling aluminum electrolyzer exhaust gases. Metallurgist. 2017;60(9-10):973–977. http://doi.org/10.1007/s11015-017-0394-z

12. Yaroshenko YuG, Gordon YaM, Khodorovskaya IYu. Energy-efficient and resource-saving technologies of ferrous metallurgy. Ekaterinburg: UIPTs; 2012, 670 р. (In Russ.)

13. Kosenko NF, Filatova NV, Grekhnev AYu. Kinetics of activated isothermal sintering of corundum. Izvestiya vysshih uchebnyh zavedenij. Seriya: Himiya i himicheskaya tekhnologiya = Russian Journal of Chemistry and Chemical Technology. Series: Khimiya i Khimicheskaya Tekhnologiya. 2006;49(4):56–58. (In Russ.)

14. Rashad AM. Vermiculite as a construction material – a short guide for civil engineer. Construction and Building Materials. 2016;125:53–62. http://doi.org/10.1016/j.conbuildmat.2016.08.019

15. Kariya J, Ryu J, Kato Y. Development of thermal storage material using vermiculite and calcium hydroxide. Applied Thermal Engineering. 2016;94:186–192. http://doi.org/10.1016/j.applthermaleng.2015.10.090

16. Pedro AA. Role of electrode chemical interaction with the melt in changing harmonic composition of current in electrodes. Elektrotekhnika = Electrical Engineering. 1997;4:27–30. (In Russ.)

17. Lysenko AP, Seryodkin YuG, Zen'kovich GS. Electrolytic production method of Al2O3 with the purity of 99.99– 99.999%. Metallurgiya cvetnyh metallov. Problemy i perspektivy: sbornik tezisov dokladov Mezhdunarodnoj nauchno-prakticheskoj konferencii = Metallurgy of Non-Ferrous Metals. Problems and Prospects: collected abstracts of the reports of the International scientific and practical conference. 13–15 May 2009, Moscow. Moscow: MISIS; 2009, р. 322–323. (In Russ.)

18. Lysenko AP, Seryodkin YuG, Zen'kovich GS. Mechanism of electrolytic obtaining of aluminum oxide suitable for the production of corundum single crystals. Tekhnologiya metallov = Technology of Metals. 2009;12:8–12. (In Russ.)

19. Gorlanov ES, Bazhin VYu, Fedorov SN. Carbide formation at a carbon-graphite lining cathode surface wettable with aluminum. Refractories and Industrial Ceramics. 2016;57(3):292–296. https://doi.org/10.1007/s11148-016-9971-0

20. Korneev SV, Trusova IA. Management of the slag adjustment in arc furnaces. Litiyo i Metallurgiya = Foundry Production and Metallurgy. 2017;(4):48–52. (In Russ.) https://doi.org/10.21122/1683-6065-2017-4-48-52

21. Gremyachkin VM, Mazanchenko EP. Gasification of porous carbon particles in carbon dioxide. Himicheskaya fizika = Russian Journal of Physical Chemistry B: Focus on Physics. 2010;12:18–23. (In Russ.)

22. Vatulin II, Minkov OB, Suharev AV, Suharev VA, Shingarev EN. High-temperature aluminothermic reduction of calcium oxide. Materialovedenie. 2009;3:46–50. (In Russ.)

23. Kosenko NF, Filatova NV, Shiganov AA. Effect of aluminate additions on the isothermal sintering kinetics of mechanically activated corundum. Neorganicheskie materialy. 2007;43(2)193–196. (In Russ.)

24. Perepelitsyn VA, Zubov AS, Kormina IV, Karpets LA, Grishpun EM, Gorokhovsky AM. Electrocorundum and its production method. Patent RF, no. 2347766C2; 2009. (In Russ.)

25. Novikov EP, Ageev EV, Ageeva EV, Altukhov AYu. Production method of fine-crystalline corundum. Patent RF, no. 2664149C2; 2018. (In Russ.)

26. Lysenko AP, Bekishev VA, Seryodkin YuG, Zenkovich GS. Obtaining method of the aluminum oxide suitable for the production of corundum single crystals. Patent RF, no. 2366608С1; 2008. (In Russ.)

27. Rutman DS, Permikina NM, Azimov SA, Adylov GT, Belogrudov AG. Production method of lamellar corundum. Patent RF, no. 1 104 798 A1; 1991. (In Russ.)

28. Kachan YuG, Mnykh AS. Algorithm for dynamic optimization of normal electrocorundum production based on terminal control method. Eastern-European Journal of Enterprise Technologies. 2008:32:48–56.

29. Pedro AA, Suslov AP. Valve action in the electrode furnace. Tsvetnyye metally. 2012;12:37–41. (In Russ.)

30. Peretyatko MA, Yakovlev PV, Peretyatko SA, Deev AS, Dyachenok GV. The study of heart transfer during boiling process of organic fluid. In: Journal of Physics: Conference Series. 2019;1614. http://doi.org/10.1088/1742-6596/1614/1/012069

31. Shurygin YA. Technologies of organizational energy saving at metallurgical enterprises. In: International Russian Automation Conference. 9–16 September 2018, Sochi. Sochi: IEEE; 2018. http://doi.org/10.1109/RUSAUTOCON.2018.8501605

32. Dubovikov OA, Yaskelyainen EE. Processing of lowquality bauxite feedstock by thermochemistry-Bayer method. Zapiski Gornogo instituta = Journal of Mining Institute. 2016;221:668–674. (In Russ.) https://doi.org/10.18454/PMI.2016.5.668

33. Shakhrai SG, Skuratov AP, Kondratiev VV, Ershov VA, Karlina AI. Justification of the possibility of heating alumina by aluminum electrolyzer anode gases warmth. Vestnik Irkutskogo gosudarstvennogo tehnicheskogo universiteta = Proceedings of Irkutsk State Technical University. 2016;3:131–138. (In Russ.)

34. Beloglazov II, Suslov AP, Pedro AA. Change of constant component of phase voltage during melting of zirconium corundum. Tsvetnye Metally. 2014;5:86–89. (In Russ.)