Authors: T.G. Cherkasova, N.A. Zolotukhina, T.V. Bulanova, Yu.A. Vinidiktova, V.V. Chenskaya

Title of the article: Analysis of acid leaching products of ash and slag waste from the boiler house of JC «TSOF BEREZOVSKAYA»

Year: 2023, Issue: 6, Pages: 39-46

Branch of knowledge: 2.6.7. Technology of inorganic substances

Index UDK: 669.054.82.83

DOI: 10.26730/1999-4125-2023-6-39-46

Abstract: The problems associated with the accumulation of ash and slag waste are becoming more and more urgent every year. Comprehensive approaches and innovative technologies are needed to solve these problems. One of the possible solutions is the processing of ash and slag waste in order to extract useful components and reduce the volume of waste. In recent years, new technological schemes have been created for the enrichment and extraction of valuable and rare elements from ash and slag waste from coal refining. Ash and slag waste from the boiler house of JC TSOF "Berezovskaya” was used as a raw material for leaching of rare and valuable metals. The chemical and phase composition of ash residues were determined. To obtain optimal conditions for opening the ash, 3M and 6M nitric acid were used. The chemical composition of the mineral part of the samples was determined on an X-ray fluorescence spectrometer. According to the results of chemical composition studies, after leaching of ash and slag waste, silicon remains almost entirely in an insoluble residue. Iron, manganese, chromium, non-ferrous metals partially pass into the liquor solution and partially remain in the sediment. An optimal concentration of 3M has been proposed for opening ash with nitric acid, since the results of ash leaching of 6M and 3M are approximately the same.

Key words: ash and slag waste ash of the boiler house of JC «TSOF Berezovskaya» ash analysis and processing leaching extraction rare and rare earth elements

Receiving date: 27.10.2023

Approval date: 10.12.2023

Publication date: 21.12.2023

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