PRODUCTION OF FLUORINE-CONTAINING MINERALIZER FOR CLINKER BURNING USING COAL FOAM AND FLY ASH FROM BEREZOVSKAYA GRES

The article presents the results of studies of the composition, structure and properties of fly ash from Berezovskaya GRES-1 (Krasnoyarsk Krai), and presents the results of studies on the use of fly ash as a lime-containing reagent in the production of synthetic fluorite by causticization of electrolytic carbon foam from aluminum production. Samples of fly ash from Berezovskaya GRES-1, fluorine-containing industrial products from aluminum production, and synthetic fluorite obtained from them were analyzed using a number of methods: X-ray phase analysis (XRD); X-ray spectral analysis (XRS); scanning electron microscope Tescan Vega III SBH (Tescan, Czech Republic); laser granulometry with the analyzer «Fritsch analyzette 22 microtec plus»; the microporosity of fly ash was determined by the t-method of de Boer. It has been established that it is preferable to use pre-hydrated fly ash to obtain synthetic fluorite and caustic soda solution. A theoretical justification is given for the possibility of using hydrated Berezovskaya fly ash to obtain a complex mineralizer for burning Portland cement clinker based on synthetic fluorite and carbon, which acts as a burnout additive. The fundamental readiness of the technology for industrial testing at an aluminum plant to obtain a synthetic fluorite concentrate for the production of Portland cement clinker and caustic soda solution for gas cleaning of an aluminum plant is shown. An empirical dependence of the optimal consumption of fly ash (FA) on the concentration of fluorine for the treatment of 100% fluorine-containing waste and industrial products was obtained. It has been proven that the implementation of this technology of causticization of coal foam will allow the utilization of up to 25 thousand tons of fly ash per year from Berezovskaya GRES-1 and will ensure import substitution of natural fluorite concentrate. For citation: Kulikov B.P., Vasyunina N.V., Dubova I.V., Samoilo A.S., Ivanova I.K., Sysoeva Y.S. Production of fluorine-containing mineralizer for clinker burning using coal foam and fly ash from Berezovskaya GRES. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2025. V. 68. N 6. P. 92-105. DOI: 10.6060/ivkkt.20256806.7174.