Modeling of equilibrium states of the thermodynamic MgFOH system for plasma pyrohydrolysis of magnesium fluoride to produce magnesium oxide and hydrogen fluoride
Abstract
The relevance of the study is due to the industrial need for processing magnesium fluoride - a waste product from beryllium production, formed during the magnesium-thermal reduction of beryllium fluoride, with the production of commercial magnesium oxide and the return of fluorine in the form of hydrofluoric acid to the production process. The equilibrium states of the MgFOH thermodynamic system for plasma pyrohydrolysis of magnesium fluoride in the temperature range 1500–5000 K, pressure 0,025–0,200 MPa, molar ratio of reagents 1–3,4 was simulated. From the condition of the maximum total mass fraction of the target products (HF, MgO), the optimal value of the molar ratio of the initial reagents n=HOH/MgF2 = 1,7, process temperature 2020 K, pressure 100 kPa was established. The hydrolysis products contain magnesium fluoride vapor. To separate the target products, sequential stepwise separation of the condensation and vapor-gas phases is required. It is shown that the process of plasma pyrohydrolysis of magnesium fluoride can be practically waste-free.
References
Exploratory research on the processing of magnesium fluoride with the aim of returning fluorine to the BP technological process and obtaining refractories based on magnesium oxide (JSC Ulba Metallurgical Plant 12.30.2021 Inv. 4912961) (in Russ.).
Pozin, M.E. (1974). Technology of mineral salts (fertilizers, pesticides, industrial salts, oxides and acids), part 1, 2. L.: Chemistry (in Russ.).
Galkin, N.P., Tumanov, Yu.N., Butylkin, Yu.P. (1972). Thermodynamic properties of inorganic fluorides. M.: Atomizdat (in Russ.).
Rakov, E.G., Tumanov, Yu.N., Butylkin, Yu.P. and others (1975). Basic properties of inorganic fluorides. M.: Atomizdat (in Russ.).
Rakov, E.G., Tumanov, Yu.N., Butylkin, Yu.P. and others (1976). Basic properties of inorganic fluorides. M.: Atomizdat (in Russ.).
Rakov, E.G., Teslenko, V.V. (1987). Pyrohydrolysis of inorganic fluorides. M.: Energoatomizdat (in Russ.).
Tumanov, Yu.N. (2013). Technologies of fluoride refined raw materials for the implementation of new generation electrical technologies. In the book: New generation electrical technologies in the production of inorganic materials: ecology, energy saving, quality. M.: FIZMATLIT. Р. 240–246 (in Russ.).
Minakova, T.S., Ekimova, I.A. (2014). Fluorides and oxides of alkaline earth metals and magnesium. Surface properties. Tomsk: Publishing House of Tomsk State University (in Russ.).
Kuznetsov, S.V., Osiko, V.V., Tkachenko, E.A., Fedorov, P.P. (2006). Inorganic nanofluorides and nanocomposites based on them. Advances in chemistry 75(12). P. 1193–1211. https://doi.org/10.1070/RC2006v075n12ABEH003637.
Vlasov, V.A., Tikhomirov, I.A., Sosnovsky, S.A. (2003). Thermodynamic modeling of plasma-chemical processes for processing metal fluorides. News of Tomsk Polytechnic University. 306(2). P. 42–44.
Sagdoldina, Zh.B., Abdulina, S.A., Shestakov, K.A., Maulet, M. (2022). Processing of industrial waste magnesium fluoride by plasma-chemical method. In the collection: Laser, plasma research and technology. LAPLAZ-2022. M.: MEPhI (in Russ.). P. 155.
Sagdoldina, Zh.B., Kylyshkanov, M.K., Maulet, M., Torebek, K.Zh. (2022). Plasma-chemical method for processing industrial waste of magnesium fluoride. Materials of the 15th International Scientific and Technical Conference dedicated to the 50th anniversary of the founding of the state scientific institution “Institute of Powder Metallurgy named after Academician O.V. Roman”. Minsk. pp. 718–721.
Kylyshkanov, M.K., Shestakov, K.A., Sagdoldina, Zh.B., Rakhadilov, B.K., Kengesbekov, A.B. (2021). Processing of industrial waste by plasma-chemical method. Bulletin of the Karaganda University. Physics Series. 3 (103). рр. 45–51. https://doi.org/10.31489/2021ph3/45-51.
Belov, G.V. (2002). Thermodynamic modeling: methods, algorithms, programs. M.: Scientific World (in Russ.).
Belov, G.V., Trusov, B.G. (2013). Thermodynamic modeling of chemically reacting systems. M.: Bauman Moscow State Technical University (in Russ.).
Copyright (c) 2024 Alexey V. Tverskoi , Vladimir S. Tverskoi , Manarbek K. Kylyshkanov , Mikhail A. Podoinikov , Konstantin A. Shestakov
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
