Authors: T.G Cherkasova, A.V. Tikhomirova, M.O. Pilin, D.A. Barancev, V.V. Chenskaya

Title of the article: Complex processing of high carbon waste from coal enrichment and combustion

Year: 2023, Issue: 5, Pages: 65-72

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

Index UDK: 669.054.82.83

DOI: 10.26730/1999-4125-2023-5-65-72

Abstract: There are more than 25 processing plants located on the territory of Kuzbass, the wastes of which pollute the environment. Coal enrichment, primarily of high-ash coals, is accompanied by the formation of a significant amount of sludge, which is capable of spontaneous combustion and contains environmentally hazardous substances that were not separated from coal during the enrichment. In addition to large-tonnage waste from heat and power sector enterprises, waste of boiler houses of various industrial enterprises contributes to pollution, and due to the imperfection of boilers, such wastes contain a large amount of unburned carbon. The article considers the problem of complex processing of waste from coal enrichment and coal consumption of one of the processing enterprises of the Kuzbass. The purpose of the work is to obtain a concentrate with a minimum ash content and tailings with a maximum ash content. Within the framework of the study, the ash content of waste and the granulometric composition were determined. Enrichment works were carried out with the release of coal from coal enrichment waste and underburning from coal consumption waste by flotation methods with various reagents and gravitational separation. The method of gravity enrichment is most suitable for the extraction of a concentrate of minimum ash content. It is concluded that flotation with kerosene and pine oil is more effective to increase the ash content of the tail, however, the ash content of the concentrate is quite high, which makes its use for energy purposes impractical, besides, it leads to losses of the mineral part.

Key words: coal waste extraction coal concentrate enrichment tailings flotation gravity enrichment

Receiving date: 12.10.2023

Approval date: 20.11.2023

Publication date: 30.11.2023

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