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

Title of the article: Petrographic characteristic of anthracite

Year: 2021, Issue: 2, Pages: 62-67

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

Index UDK: 662.741.3.022

DOI: 10.26730/1999-4125-2021-2-62-67

Abstract: The relevance of the study is determined primarily by the fact that for predicting technological properties and choosing the main directions of industrial use of solid fuels, data on their material and petrographic composition are of great importance, since the maceral composition of coal raw materials is one of the parameters of the classifications and codifications of coals according to GOST 25543-2013. The purpose of this study is to determine the petrographic composition of two samples of highly metamorphosed coals. As objects of research, we used two samples of anthracite coals mined at the Bungurskiy and Krasnogorskiy coal pits, which are located in the southwestern part of the Kuznetsk Basin. The investigated samples were characterized by technical and elemental analysis methods. It was found that they have a low ash content (4.0%), an output of volatile substances of less than 8% and a relatively low content of total sulfur (up to 0.3%). The indicators of vitrinite reflection determined the degree of metamorphism of the samples. According to GOST 21489 - 76, both samples can be attributed to the VII - VIII stages of the anthracite group, and according to GOST 25543 - 2013 - to groups 1A, subgroups 1AF. A visual analysis of polished sections of anthracite samples revealed that their petrographic composition is dominated by microcomponents of the inertinite group. This group (65 - 69% organic matter) consists mainly of semifusinite and sclerotinitis. Vitrinite in anthracites contains 24-26% and is mainly represented by collinite, which cements fusinized microcomponents in the form of a homogeneous mass.

Key words: anthracite petrographic analysis vitrinite reflection index coal macerals inertinite

Receiving date: 23.03.2021

Publication date: 29.04.2021

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