Home – Home – Jornals – Chemistry for Sustainable Development 2019 number 4

The operating experience for anode materials used in the production of fluorine shows that not all plates that meet the requirements of Russian technical specifications TU 48-12-34-95 have the required service life; some of them are destroyed quite quickly during operation. In this regard, we have carried out the studies of coke plates (CP) of Russian manufacturers using differential thermal analysis (DTA), X-ray structural analysis (XRD), atomic emission spectroscopy (AES), scanning electron microscopy (SEM), various physical-mechanical and electrical methods. The technical characteristics of the coke plates of two different trademarks: Doncarb produced by Doncarb Graphite LLC (Chelyabinsk) and VCC produced by the Volzhsky Chemical Complex LLC (Volzhsky) were determined: porosity, ash content, density, compressive strength, electrical resistivity. Technical characteristics described above fully meet the requirements of the Russian TU. It was shown that the content of impurities in Doncarb plates is 0.50 wt. %, while that in VCC plates is 0.33 wt. %. The porosity of the coke plate materials was carried out. In general, Doncarb samples are characterized by the presence of pores 0.6 to 12 μm in size, while the presence of larger pores (more than 117 μm) is characteristic of VCC samples. The presence of the turbostratic structure of carbon with the parameters d ₀₀₂ = 0.347-0.345 nm was established for the coke plates of both trademarks. Classification of coke plates with respect to their thermal stability was carried out on the basis of the data obtained by means of differential thermal analysis. The use of the obtained data as a supplement to the parameters included in TU 48-12-34-95 allows one to improve the evaluation of the quality of coke plates and to predict their lifetime reliably.