Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum


  • Gigo Jandieri Metallurgical Engineering and Consulting Ltd; 8 Elene Akhvlediani St., (Orkhevi) Tbilisi, 0109, Georgia
  • David Sakhvadze Georgian Powders Ltd; PhD, Member of the Academy of Engineering Sciences of Georgia
  • Inga Janelidze Georgian Technical University, Tbilisi, Georgia
  • Omar Mikadze Georgian Technical University, Tbilisi, Georgia



econdary aluminum slag; recycling; aluminum recovery; plasmacarbothermia; complex ferroalloys.


Based on a critical analysis of the current state and prospects of development of the problem of pyrometallurgical recovery/extraction of aluminum from aluminum-bearing industrial waste, the need to replace traditional, electrocarbonothermic processes and melting process units with innovative, plasma carbothermal processes and furnace-reactors, with the possibility of reverse feeding and recovery of gasified during melting metal and metal oxide components is substantiated. On the basis of this analysis a new technological scheme of smelting with a new design of plasma-arc furnace-reactor, which provides a solution to the problem using a special hollow double-shell graphite cathode connected to the system of circulating supply of gases separated from the reaction zone, was developed and presented. The proposed technological scheme also differs in the use of such highly active liquid and gaseous reagents as carbon-containing reducing agents as calcium carbide (CaC2) and methane (CH4). The main features of chemism of reducing processes are described. It is shown that by replacing traditional coke with anodized calcium carbide and natural gas (methane) the recovery rate of aluminum oxide (Al 29-34%) and silica (SiO2) and hematite (Fe2O3) present with it increases to 80-99%. Specific power consumption is reduced by 35-40%, the 90-95% reduction in the loss of target elements, the 80% reduction in the emission of greenhouse carbon dioxide, which is replaced by a very valuable recyclable synthesis gas - CO-H2. By additionally feeding separate portions of quartzite and steel-rolling scale in the furnace-reactor, a complex alloy-ligature of Fe-Si-Al-Ca system is melted, with the ratio of components: 1:[1.3-2]:[1.3-1.2]:[0.9-1.25]. With the introduction into industrial practice of the plasma carbothermal process of aluminum reduction from secondary aluminum dumping slags accumulated in the world (4 million tons/year), it will be possible to return up to 1-1.5 million tons/year of aluminum to the production processing cycle.


H.U. Sverdrup, K.V. Ragnarsdottir, D. Koca: Resources, Conservation and Recycling, 103 (2015) 139-154.


Li Yun, Yue Qiang, He Junhao, Zhao Feng, Wang Heming: Resources Policy, 65 (2020) 101573.


S.K. Das, W. Yin: The Journal of The Minerals, Metals & Materials Society (TMS), 59 (2007) 57-63.


M.S. Mohamed, A. Ismail: In: 17th International Conference on Applied Mechanics and Mechanical Engineering, Military Technical College, (2016) 129-141.

Alejandro Graf: In Woodhead Publishing in Materials, Materials, Design and Manufacturing for Lightweight Vehicles (Second Edition), Woodhead Publishing, (2021) 97-123.

K. Sivanur, K.V. Umananda, P. Dayanand: AIP Conference Proceedings, 2317 (2021) 020032.


O. Fomin, M. Gorbunov, A. Lovska, J. Gerlici, K. Kravchenko: Materials, 14 (2021) 1915.


Xiaoguang Sun, Xiaohui Han, Chaofang Dong and Xiaogang Li: Advanced Aluminium Composites and Alloys, IntechOpen, (2021), Electronic resource: Crossreff

F. Soetens: Structural Engineering International, 20 (2010) 430-435.


T. Dokšanović, I. Džeba, D. Markulak: Tehnički vjesnik, 24(5), (2017) 1609-1618.

K.V. Nikitin: Recycling of metal waste based on aluminum. Samara State. tech. university, 67 p (2015) Link

E.L. Skuybeda: Increasing the efficiency of the production of aluminum alloys in the recycling of scrap and metal waste. Zaporozhye National Technical University. Electronic resource: Link .

A. Kudyba, S. Akhtar, I.Johansen, et al: The Journal of The Minerals, Metals & Materials Society (TMS) 73 (2021) 2625-2634.


M. Mahinroosta, A. Allahverdi: Journal of Environmental Management, 223 (2018) 452-468.


G.V. Dzhandieri: Chernye Metally, 1(1057), (2020) 56-63.

G. Jandieri: Resources Policy, 75, (2022) 102462.


A.V. Fedotova, V.M. Fedotov: Second International Congress "Non-Ferrous Metals Metals-2010", section IX, Recycling of secondary resources of the metallurgical industry, (2010) 809-910 [in Russ.]

E. Balomenos, D. Panias, I. Paspaliaris, B. Friedrich, B. Jaroni, A. Steinfeld, E. Guglielmini, M. Halmann, M. Epstein and I. Vishnevetsky: Proceedings - European Metallurgical Conference, EMC (2011), Link.

V.S. Ignatiev, G.A. Polyakov, G.N. Tregubenko, S.N. Podgorniy: Metallurgicheskaya i gornorudnaya promyshlennost. Dnepropetrovsk, NMetAU, 2, (2017) 41-45.

I. Chervony, A. Verkhovlyuk, V. Dovbenko: Modern Scientific Researches, 1(09-01) (2019) 9-18,

I.F. Selyanin, V.B. Deev, A.V. Kukharenko: Izvestiya Vuzov. Tsvetnaya Metallurgiya (Izvestiya. Non-Ferrous Metallurgy), 2 (2015) 20-25.


M. Ridderbusch, B. Jaroni, A. Arnold, B. Friedrich: Proceedings of EMC, (2009) 1-16. Crossreff

G. Jandieri, D. Sakhvadze: Scientific Proceedings X International Congress "Machines, Technologies, Materials" Year XXI, 1 (2013) 107-110.

A. Ahmed, H. El-Faramawy, S. Ghali, M. Mishreky: Key Engineering Materials, 835 (2020) 75-82.


G. Grimaud, N. Perry, B. Laratte: Int. J. Procedia CIRP, 48 (2016) 212-218.


P. Nunez, S. Jones: Int. J. Life Cycle Assess 21, (2016) 1594-1604.


M. Halmann, A. Steinfeld, M. Epstein, I. Vishnevetsky: Mineral Processing and Extractive Metallurgy Review, 35(2) (2014) 126-135.


Yu.V. Tsvetkov, A.V. Nikolaev, A.V. Samokhin; Automatic Welding, 10-11 (2013) 112-118.

M. Halmann, M. Epstein, A. Steinfeld: Mineral Processing and Extractive Metallurgy Review, 33(5) (2012) 352-361.


D. Forrest, J. Szekely: The Journal of The Minerals, Metals & Materials Society (TMS), 43 (1991) 23-30.


Kai Dong, Xueliang Wang: Metals, 9 (2019) 273


Li X, Zhang G, Tang K. et al: Metallurgical and Materials Transactions B, 46 (2015) 2384-2393.


S. Nasr, K.P. Plucknett: Energy Fuels, 28(2) (2014) 1387-1395.


C. Kemper, E. Balomenos, D. Panias, I. Paspaliaris, B. Friedrich: Light Metals, Springer, Cham. (2014) 789-794.


G. Jandieri, G. Jishkariani, D. Sakhvadze, G. Tavadze: The Jubilee Conference on Modern Technologies and Methods of Inorganic Materials Science. Dedicated to the 100 Anniversary of Acad. Ferdinand Tavadze. Tbilisi, Georgia, (2012) 304-319.

I. Janelidze, G. Jandieri, E. Janelidze: Bulletin of the Georgian National Academy of Sciences, 7, No. 2, (2013) Link.

I. Janelidze, G. Jandieri, T. Tsertsvadze: Physics and Chemistry of Solid State, 22(2) (2021) 345-352.


S.K. Nayak, A. Srivastava, K. Mishra, S. Bandypadhyay: Asia Steel Conference, (2018). Electronic resources: Link.

E.M. Kharchenko, K.Z. Zhumashev: Izvestiya Vuzov. Tsvetnaya Metallurgiya (Izvestiya. Non-Ferrous Metallurgy), 4 (2013) 3-6.

A.E. Il'yasov, S.N. Sharkaev, A.B. Akhmetov, G.D. Kusainova, V.I. Yablonsky: Ferrous Metallurgy. Bulletin of Scientific, Technical and Economic Information, 9 (2018) 58-64.


A.W. Bydalek: Microscopy and Analysis, (2002) 25-27. Link.

Xia JF, Xu Jifang, Liu GY, Jie C at al: The Chinese Journal of Process Engineering, 10, (2010) 78-82.

Xiaojiao Cai, Yun Hang Hu: Energy Sci Eng., 7 (2019) 4-29.


A. Toshiaki, U. Tetsuro, O. Yoshifumi: Transactions ISIT, 25(327) (1985) 326-332.


Yu.P. Vorobyov: Proceedings of the Chelyabinsk Scientific Center, 4 (2001) 10-13 Link.

D.V. Kostomarov: Crystallography Reports, 62 (2017) 639-647


Xuechen Wu, Junyu Lang, Yueyue Jiang, Yan Lin, Yun Hang Hu: ACS Sustainable Chem. Eng., 7(23) (2019) 19277-19285



How to Cite

Jandieri, Gigo, David Sakhvadze, Inga Janelidze, and Omar Mikadze. 2022. “Development and Investigation of the Technological Process of Plasma Carbothermal Reduction of Slag from Secondary Metallurgy of Aluminum”. Metallurgical and Materials Engineering 28 (4):657-73.