Authors: E.V. Cherkasova, A.V. Tikhomirova, T.G. Cherkasova, A.A. Golovachev

Title of the article: Concentrates of rare and rare earth elements from Kuzbass ash and slag waste

Year: 2021, Issue: 2, Pages: 35-39

Branch of knowledge: 05.17.01 Technology of inorganic substances

Index UDK: 662.613.1

DOI: 10.26730/1999-4125-2021-2-35-39

Abstract: Coal, along with oil and natural gas, is the most important raw material in the global energy industry and the main one in Russia and Kuzbass. After its incineration, a huge amount of ash and slag waste (ash) is formed, which accumulates on the territories of enterprises and power plants, and then is exported to waste dumps, occupying large areas and causing contamination of soils and natural water. The development of technology for extracting rare and rare earth elements from the waste will help solve the problem of processing and recycling these wastes, which will lead to an improvement in the environmental situation. The processing of the ash in the concentrate will provide metallurgical enterprises with relatively cheap raw materials. To obtain a concentrate rich in rare and rare earth elements, two methods were used that are employed in industry for the enrichment of various chemical, mining and coal industry wastes containing these elements. The first method is based on the sequential deposition of foreign components from the extract obtained during dissolution of ash and separation of a mixture of precipitated oxalates of rare and rare earth metals. The second one is based on ash enrichment by ion flotation. As a result of this work, two concentrates were obtained, the content of rare earth elements in which exceeded their content in the source material by 10-100 times.

Key words: waste of coal consumption ash slag extraction rare and rare earth elements concentrates

Receiving date: 06.03.2021

Publication date: 29.04.2021

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