Keywords: electro-thermal furnace, fluidized bed, graphite purification, operating modes.


Purpose: The aim of the study was the determination of the operating modes for the laboratory electro-thermal fluidized bed furnace of 10 kg/h productivity to obtain new scientific and practical data on current-voltage curves relevant for such units and further selection of respective electrical power sources.
Methodology: The study of the furnace operation was conducted by simulation of its thermal balance and electric resistance at relevant modes. For calculation of the current-voltage curves there were used equations for electric power, resistivity of fluidized bed as well as dependences for total, useful and no-load power at various operating temperatures and productivity.
Findings: It has been obtained the current-voltage curves of the fluidized bed furnace of 10 kg/h productivity which are presented by curves of the electro-thermal fluidized bed for defined operating temperatures 0 – 2700 °C; curves of the electro-thermal fluidized bed for defined furnace productivities G = 0 – 10 kg/h; curves for current density on the lining and electrodes surfaces and average current density by furnace radius i(I); curves for constant power in range 5 – 40 kW. On the basis of analysis, the area of the furnace steady operation mode has been defined that excludes the possibility of a short circuit. It has been also developed the modes of heating up, temperature and productivity transition as well as algorithms to sustain given productivity and operating temperature.
Originality: For the first time, it has been scientifically justified the selection of operating modes providing control of electric power for the electro-thermal fluidized bed furnace on the basis of its current-voltage curves, and defined area of the furnace steady operation.
Practical value: As a result of the study, the technical requirements for the manufacturing of the electric power source for the laboratory electro-thermal-fluidized bed furnace of 10 kg/h productivity at Material Research Center, Ltd (Kyiv, Ukraine) were developed.


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How to Cite
Fedorov, S., Sybir, A., Hubynskyi, M., Hubynskyi, S., Foris, S., Gogotsi, A., & Koval, S. (2019). STUDY OF THE OPERATING MODES FOR THE ELECTRO-THERMAL FLUIDIZED BED FURNACE OF 10 KG/H PRODUCTIVITY. Metallurgical and Ore Mining Industry, (3-4), 48-55.