Authors: N.I. Fedorova, Z.R. Ismagilov

Title of the article: Characteristic of the chemical composition of sapropelite coal ash from various deposits

Year: 2020, Issue: 3, Pages: 27-32

Branch of knowledge: 05.17.07 Chemical technology of fuel and high-energy substances

Index UDK: 622.64.001.5

DOI: 10.26730/1999-4125-2020-3-27-32

Abstract: The relevance of the work is determined by the fact that ash composition of various types of solid fossil fuels is one of the factors that determines both the technology of their burning and the chemical and technological methods of their processing. Usually, the mineralogical composition of coals is different, while the size of inclusions and the degree of homogeneity of the distribution of mineral substances vary over a fairly wide range. Therefore, it is necessary to study the mineral part of solid fuels to solve the problem of finding rational, energy-saving technologies for their processing.
This paper presents the results of a study of the composition of ash residues of sapropelite coals of various deposits.
Eight samples of sapropelite coals were used as the objects of study and they were characterized using the data technical and elemental analyses.
The mineral part of sapropelites was characterized by the ash residues composition by 10 basic oxides. According to the chemical composition of their ash, melting coefficients K_pl and basicity index I₀, were calculated, the value of the latter indicates a low basicity of ash residues. In the process of determining the slagging and polluting properties of the ashes of the studied coals, it was found that almost all samples had a rather low ability to slag and contaminate the heating surfaces.

Key words: sapropelite coals elemental composition chemical composition of ash fusibility slag and polluting properties of ash

Receiving date: 29.05.2020

Publication date: 30.09.2020

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