АНАЛІЗ СТРУКТУРНО-ХІМІЧНОГО СТАНУ ДУПЛЕКС-СИСТЕМ СИЛІКАТИ-СИЛІЦІДИ ЛУЖНОЗЕМЕЛЬНИХ МЕТАЛІВ. Повідомлення 3. МЕХАНІЗМ ДЕСУЛЬФУРАЦІЇ ПРИ ВИПЛАВЦІ ДОМЕННОГО ЧАВУНУ: Procesi littâ, 2023, Vol 2 (152), 34-41

• Datum: 2023
• Hauptverfasser: Бєлов, Б. Ф., Троцан, А. І., Власова, О. В.
• Format: Artikel
• Sprache: Ukrainian
• Veröffentlicht: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Schlagworte: структурно-хімічні реакції; плавильні шлаки; механізм десульфурації чавуну; адсорбційна ємність; хімічні елементи
• Online Zugang: https://plit-periodical.org.ua/index.php/plit/article/view/63
• Назва журналу: Casting Processes

The mechanism of cast iron desulfurization through structural and chemical reactions in smelting slags corresponding to the composition of the main mineral phases is presented: monticellite (MT, SiO2MgOCaO) → mervinite (MP, 2SiO2MgO3CaO) → ockermannite (OK, 2SiO2MgO2CaO) →diopside (DP, 2SiO2MgOCaO) → rankinite (pH, 2SiO23CaO) and eutectic slags (E, 3SiO2MgO4CaO). A sequential series of adsorption capacity of slag phases with respect to sulfur (АС, mas. %) and the depth of metal desulfurization – Δ(S), ppm was determined: Е (3.54/36) → MR (4.8/49) → OK (5, 7/59) → DP (7.14/74) → MT (9.8/103) → RN (20/222). In factory conditions, the efficiency of smelting slags of eutectic composition and diopside for ladle processing of cast iron was tested. The expediency of using such blast furnace slags for ladle processing of cast iron has been established, which at a consumption of 5-10 kg/t provide a desulfurization depth of 200-400 ppm. The consumption of slag is significantly reduced with the additional deoxidation of smelting slags with carbon during the release of melt in the ditch of the foundry and in the pig iron ladle. Refernces 1. Belov B.F., Trotsan A.I., Vlasovа O.V. Analysis of the structural and chemical state of duplex silicate-silicide systems of alkaline earth metals. Message 2. Duplex-system SiO2–MgO–CaO : Si–Mg–Ca. Casting processes. 2023. № 1. S. 12–19 [in Russian]. 2. Belov B.F., Trotsan A.I., Karlikova Ya.P. Structural and chemical bases of the processes of refining iron-carbon melts. Mariupol: PSTU. 2018. 184 p. [in Russian]. 3. Marchenko A.I., Buga I.D., Rudenko Yu.R. et al. Influence of magnesium oxide content on the desulfurization capacity of blast-furnace slag. Metallurgist. and mining. Industry. 2009. №. 3. S. 13–17 [in Russian]. 4. Buga I.D., Trotsan A.I., Belov B.F., Nosochenko O.V., Deripasko V.A. The processes of slag formation and desulfurization in the smelting of blast-furnace iron with smelting slags. Casting processes. 2013. №. 1. S. 3–8 [in Russian]. 5. Pogivanov M.О. Out-of-furnace metallurgy of cast iron. Kyiv: FTIMS NAS of Ukraine. 2006. 78 p. [in Russian].