English
Русский 14-27 p.
This paper analyzes the physical and chemical processes of sulfur removal during agglomeration of iron ore mineral raw materials to build a technologically efficient processing model. Thermodynamic aspects of the formation of sulfates are considered, taking into account the features of desulfurization of calcined ore materials in the presence of alkali-earth metal compounds in the charge of agglomerates, when sulfur dioxide is partially captured by them. It was found that the addition of limestone to concentrate and pure pyrite has no noticeable ef-fect on the removal of sulfur from the charge in the temperature range of 600-900 ° C during short-term firing due to the weak absorption of calcium carbonate by sulfur dioxide. Analysis of the agglomeration processes of sulfu-rous iron ore materials found that free lime absorbs sulfur well, since an intermediate stage is necessary for lime-stone absorption – dissociation of calcium carbonate. The factors contributing to decarbonization, which lead to a more complete removal of sulfide sulfur from oxidized iron ore materials, have been investigated. The thermody-namic analysis carried out by the authors allowed us to scientifically substantiate the experimentally observed in-tensification of the dissociation reaction of sulfates with an increase in temperature, a decrease in the partial pres-sure of oxygen in the furnace atmosphere during the processing of iron ore agglomerate. The data obtained in the study show that in oxidizing and slightly oxidizing conditions, sulfates decompose with increasing temperature if their contact with silicon and iron or aluminum oxides is ensured, and the formation of a melt accelerates mass exchange and promotes desulfurization. It is revealed that at the same time, liquid-phase sintering intensifies, in-hibiting the release of gases. In the conditions of the agglomeration process as a whole, the atmosphere is oxidiz-ing, although in some micro-volumes near the burning coke particles, the reducing potential of the gas phase is possible. Therefore, it makes sense to consider a uniform ratio between sulfate and sulfide sulfur in various gaseous environments.
1. Li J., An H.-F., Liu W.-X., Yang A.-M., Chu M.-S. Effect of basicity on metallurgical properties of magnesi-um fluxed pellets. Journal of Iron and Steel Research International. 2020. № 27 (3). P. 239 – 247.
2. Puchkov A.Ju., Lobaneva E.I., Kultygin O.P. Algoritm prognozirovanija parametrov sistemy pererabotki othodov apatit-nefelinovyh rud. Prikladnaja informatika. 2022. T. 17. № 1. S. 55 – 68.
3. Meshalkin, V.P., Bobkov, V.I., Dli, M.I., Fedulov, A.S. Mathematical simulation of chemical and ener-gotechnological processes and procedures of coke fines burning in agglomerated layer. CIS Iron and Steel Review. 2020. 19. P. 13 – 17.
4. Dli M.I., Vlasova E.A., Sokolov A.M., Morgunova E.V. Creation of a chemical-technological system digital twin using the Python language. Journal of Applied Informatics. 2021. Vol. 16. № 1 (91). P. 22 – 31.
5. Belyakov N.V., Nikolina N.V. Plant protection technologies: From advanced to innovative. Journal of Phys-ics: Conference Series. 2021. № 1942 (1). P. 012072.
6. Meshalkina V.P., Bobkov V.I., Dli M.I., Garabadzhiu A.V., Panchenko S.V., Orekhov V.A. Experimental Studies of the Physicochemical Process of Heating Ore Phosphorites. Russian Journal of General Chemistry. 2023. Vol. 93. № 3. P. 686 – 693.
7. Meshalkin V.P., Orekhov V.A., Dli M.I., Bobkov V.I., Chistyakova T.B. Method to Calculate the Limiting and Optimal Conditions of the Chemical and Energy Engineering Process of Calcination of Lump and Pelletized Phosphate Ore Raw Materials on the Grate of a Traveling-Grate Roasting Machine. Theoretical Foundations of Chemical Engineering. 2023. Vol. 57. № 4. P. 450 – 458.
8. Zhu X., Ji Y.A digital twin-driven method for online quality control in process industry. International Journal of Advanced Manufacturing Technology. 2022. № 119 (5-6). P. 3045 – 3064.
9. Shekhovtsov V.V., Vlasov V.A., Skripnikova N.K., Semenovykh M.A. Structure Formation of Concrete Sys-tems Modified By Nonstandard Particles. Russian Physics Journal. 2021. № 63 (9). P. 1590 – 1595.
10. Bobkov V.I., Dli M.I., Sokolov A.M., Rubin Y.B. Analysis of chemical-metallurgical agglomeration pro-cesses during charge sintering. CIS Iron and Steel Review. 2020. № 20. P. 7 – 11.
11. Ming Yan, Xinnan Song, Jin Tian, Xuebin Lv, Ze Zhang, Xiaoyan Yu and Shuting Zhang. Construc-tion of a New Type of Coal Moisture Control Device Based on the Characteristic of Indirect Drying Process of Coking Coal. Energies 2020. № 13 (16). P. 4162.
12. Tomtas P., Skwiot A., Sobiecka E., Obraniak A, Ławińska K., Olejnik T.P. Bench Tests and CFD Simula-tions of Liquid-Gas Phase Separation Modeling with Simultaneous Liquid Transport and Mechanical Foam De-struction. Energies. 2021. № 14 (6). P. 1740.
13. Nayak D., Ray N., Dash N., (...), Pati S., De P.S. Induration aspects of low-grade ilmenite pellets: Op-timization of oxidation parameters and characterization for direct reduction application. Powder Technology. 2021. № 380. P. 408 – 420.
14. Li J., An H.-F., Liu W.-X., Yang A.-M., Chu M.-S. Effect of basicity on metallurgical properties of magne-sium fluxed pellets. Journal of Iron and Steel Research International. 2020. № 27 (3). P. 239 – 247.
15. Wang S., Guo Y., Zheng F., Chen F., Yang L. Improvement of roasting and metallurgical properties of fluo-rine-bearing iron concentrate pellets. Powder Technology. 2020. № 376. P. 126 – 135.
16. Kossoy A. Effect of thermal inertia-induced distortions of DSC data on the correctness of the kinetics evalu-ated. Journal of Thermal Analysis and Calorimetry. 2021. T. 143. № 1. P. 599 – 608.
17. Tian Y., Qin G., Zhang Y., Zhao L., Yang T. Experimental research on pellet production with boron-containing concentrate. Characterization of Minerals, Metals, and Materials. 2020. P. 91 – 102.
18. Tian H., Pan J., Zhu D., Wang D., Xue Y. Utilization of Ground Sinter Feed for Oxidized Pellet Production and Its Effect on Pellet Consolidation and Metallurgical Properties. Minerals, Metals and Materials Series. 11th International Symposium on High-Temperature Metallurgical Processing. 2020. P. 857 – 866.
19. Matkarimov S.T., Berdiyarov B.T., Yusupkhodjayev A.A. Technological parameters of the process of pro-ducing metallized iron concentrates from poor raw material. International Journal of Innovative Technology and Exploring Engineering. 2019. № 8 (11). P. 600 – 603.
20. Orehov V.A. Cifrovizirovannoe mnogomasshtabnoe modelirovanie teplo-tehnologicheskih rudovosstanov-itel'nyh processov v jelektrotermicheskoj fosfornoj pechi. Jenergobezopasnost' i jenergosberezhenie. 2023. № 4. S. 31 – 35.
2. Puchkov A.Ju., Lobaneva E.I., Kultygin O.P. Algoritm prognozirovanija parametrov sistemy pererabotki othodov apatit-nefelinovyh rud. Prikladnaja informatika. 2022. T. 17. № 1. S. 55 – 68.
3. Meshalkin, V.P., Bobkov, V.I., Dli, M.I., Fedulov, A.S. Mathematical simulation of chemical and ener-gotechnological processes and procedures of coke fines burning in agglomerated layer. CIS Iron and Steel Review. 2020. 19. P. 13 – 17.
4. Dli M.I., Vlasova E.A., Sokolov A.M., Morgunova E.V. Creation of a chemical-technological system digital twin using the Python language. Journal of Applied Informatics. 2021. Vol. 16. № 1 (91). P. 22 – 31.
5. Belyakov N.V., Nikolina N.V. Plant protection technologies: From advanced to innovative. Journal of Phys-ics: Conference Series. 2021. № 1942 (1). P. 012072.
6. Meshalkina V.P., Bobkov V.I., Dli M.I., Garabadzhiu A.V., Panchenko S.V., Orekhov V.A. Experimental Studies of the Physicochemical Process of Heating Ore Phosphorites. Russian Journal of General Chemistry. 2023. Vol. 93. № 3. P. 686 – 693.
7. Meshalkin V.P., Orekhov V.A., Dli M.I., Bobkov V.I., Chistyakova T.B. Method to Calculate the Limiting and Optimal Conditions of the Chemical and Energy Engineering Process of Calcination of Lump and Pelletized Phosphate Ore Raw Materials on the Grate of a Traveling-Grate Roasting Machine. Theoretical Foundations of Chemical Engineering. 2023. Vol. 57. № 4. P. 450 – 458.
8. Zhu X., Ji Y.A digital twin-driven method for online quality control in process industry. International Journal of Advanced Manufacturing Technology. 2022. № 119 (5-6). P. 3045 – 3064.
9. Shekhovtsov V.V., Vlasov V.A., Skripnikova N.K., Semenovykh M.A. Structure Formation of Concrete Sys-tems Modified By Nonstandard Particles. Russian Physics Journal. 2021. № 63 (9). P. 1590 – 1595.
10. Bobkov V.I., Dli M.I., Sokolov A.M., Rubin Y.B. Analysis of chemical-metallurgical agglomeration pro-cesses during charge sintering. CIS Iron and Steel Review. 2020. № 20. P. 7 – 11.
11. Ming Yan, Xinnan Song, Jin Tian, Xuebin Lv, Ze Zhang, Xiaoyan Yu and Shuting Zhang. Construc-tion of a New Type of Coal Moisture Control Device Based on the Characteristic of Indirect Drying Process of Coking Coal. Energies 2020. № 13 (16). P. 4162.
12. Tomtas P., Skwiot A., Sobiecka E., Obraniak A, Ławińska K., Olejnik T.P. Bench Tests and CFD Simula-tions of Liquid-Gas Phase Separation Modeling with Simultaneous Liquid Transport and Mechanical Foam De-struction. Energies. 2021. № 14 (6). P. 1740.
13. Nayak D., Ray N., Dash N., (...), Pati S., De P.S. Induration aspects of low-grade ilmenite pellets: Op-timization of oxidation parameters and characterization for direct reduction application. Powder Technology. 2021. № 380. P. 408 – 420.
14. Li J., An H.-F., Liu W.-X., Yang A.-M., Chu M.-S. Effect of basicity on metallurgical properties of magne-sium fluxed pellets. Journal of Iron and Steel Research International. 2020. № 27 (3). P. 239 – 247.
15. Wang S., Guo Y., Zheng F., Chen F., Yang L. Improvement of roasting and metallurgical properties of fluo-rine-bearing iron concentrate pellets. Powder Technology. 2020. № 376. P. 126 – 135.
16. Kossoy A. Effect of thermal inertia-induced distortions of DSC data on the correctness of the kinetics evalu-ated. Journal of Thermal Analysis and Calorimetry. 2021. T. 143. № 1. P. 599 – 608.
17. Tian Y., Qin G., Zhang Y., Zhao L., Yang T. Experimental research on pellet production with boron-containing concentrate. Characterization of Minerals, Metals, and Materials. 2020. P. 91 – 102.
18. Tian H., Pan J., Zhu D., Wang D., Xue Y. Utilization of Ground Sinter Feed for Oxidized Pellet Production and Its Effect on Pellet Consolidation and Metallurgical Properties. Minerals, Metals and Materials Series. 11th International Symposium on High-Temperature Metallurgical Processing. 2020. P. 857 – 866.
19. Matkarimov S.T., Berdiyarov B.T., Yusupkhodjayev A.A. Technological parameters of the process of pro-ducing metallized iron concentrates from poor raw material. International Journal of Innovative Technology and Exploring Engineering. 2019. № 8 (11). P. 600 – 603.
20. Orehov V.A. Cifrovizirovannoe mnogomasshtabnoe modelirovanie teplo-tehnologicheskih rudovosstanov-itel'nyh processov v jelektrotermicheskoj fosfornoj pechi. Jenergobezopasnost' i jenergosberezhenie. 2023. № 4. S. 31 – 35.
Bobkov V.I., Bykov A.A., Sinyavsky Yu.V., Puchkov A.Yu. Analysis of physical and chemical processes of sulfur removal during agglomeration of ore raw materials. Chemical Bulletin. 2023. 6 (3). P. 14 – 27.