Authors: N.I. Fedorova

Title of the article: Analysis of technological and physico-chemical properties of hard coals of the GJ technological grade

Year: 2024, Issue: 4, Pages: 79-85

Branch of knowledge: 2.6.12. Chemical technology of fuel and high-energy substances

Index UDK: 662.749

DOI: 10.26730/1999-4125-2024-4-79-85

Abstract: The relevance of the work carried out is justified by the need to determine the technological properties of coking coals to ensure the possibility of developing the optimal composition of the charges when obtaining coke products of the required quality. The purpose of the study is to establish differences in the technological and physico–chemical properties of coals among samples of the same brand. 6 samples of formation samples of GJ technological grade coals selected at various Kuzbass coal mining enterprises were used as objects of research. These samples are coal raw materials in the production of metallurgical coke, which are included in the charge for coking as a "sintering base". The analysis of the data obtained showed that among the studied samples there are differences in the content of carbon, hydrogen, the yield of volatile substances, in the values of vitrinite reflection indicators and in technological indicators of sinterability. It was found that the vitrinite reflection index Ro,r, increases in a number of carbon samples from 0.77 to 0.91%, the thickness of the plastic layer y varies from 13 mm to 19 mm. Physico-chemical analyses (NMR spectroscopy, thermogravimetric analysis) have established that the test samples are characterized by different indicators of aromaticity fa and, as a result, different thermal stability of their organic mass. The results obtained are important because they allow us to get a more complete picture of the technological value of the studied coal samples.

Key words: coal coking sintering thermogravimetric analysis ¹³C NMR spectroscopy

Receiving date: 13.05.2024

Approval date: 25.07.2024

Publication date: 26.09.2024

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