Authors: S.A. Semenova, Yu.F. Patrakov, A.V. Yarkova

Title of the article: Production of flotation reagents for coal enrichment based on ozonated petroleum products

Year: 2022, Issue: 3, Pages: 13-21

Branch of knowledge: 2.8.9. Mineral processing

Index UDK: 61.51:52.45.19

DOI: 10.26730/1999-4125-2022-3-13-21

Abstract: Petroleum products are traditionally used in technologies for the enrichment of mineral ores, oil shale and coal. To increase the efficiency of oil-based flotation reagents for the enrichment of hard coals, the method of ozonolytic modification was used. The studied samples are light crude oil and kerosene fraction of oil distillation. The choice of the optimal ozone consumption is based on testing several concentrations: 45, 85 and 100 mg/l. The specific ozone consumption was 6-12 g/kg for kerosene modification and 8-15 g/kg for oil. It is shown that the most optimal conditions for the modification of petroleum products to increase their flotation activity are ozone concentrations in the range of 45 ≤C (O3) ≤ 85 mg/l. Ozonation of petroleum products contributes to the modification of their hydrocarbon composition with the formation of oxygen-containing compounds of various functionality: aliphatic and aromatic acids, alcohols, esters, as well as high-molecular resinous products. Chemical and IR spectral analysis methods were used to characterize the degree of oxidation. The resulting products acquire the properties of complex reagents of the "collector + foaming agent" type. The use of ozonated petroleum products leads to an increase in the efficiency of coking coal flotation: a decrease in reagent consumption, an increase in concentrate yield and ash content of waste. Ozonolytic treatment of petroleum products has shown high efficiency for crude light oils. The study of the flotation activity of the reagents was carried out using low-ash coal of the KS brand, which was selected as a model sample with a high content of hydrophobic organic part to minimize the contribution to the hydration of the surface of the mineral component of coal.

Key words: oil oil fractions ozonation flotation coal

Receiving date: 08.04.2022

Approval date: 07.06.2022

Publication date: 07.07.2022

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