Authors: E.P. Terekhin, E.A. Chueva, V.I. Khvorostyanova

Title of the article: Improvement of additional mineral processing technology to increase the quality of iron ore concentrate

Year: 2023, Issue: 3, Pages: 82-93

Branch of knowledge: 2.8.8 Mining machines, geotechnology (engineering)

Index UDK: 622.341.1

DOI: 10.26730/2618-7434-2023-3-82-93

Abstract: The mining industry of ferrous metallurgy in Russia takes a leading place in the world in terms of the volume of production of metallurgical raw materials and the preservation of such indicators in the industry in the current economic situation is possible only by improving the quality of iron ore concentrate and reducing its cost. The development of the technology of out-blast furnace steel production requires an increase in the production of fluted pellets and hot-briquetted iron at Kursk Magnetic Anomaly (KMA) iron ore enterprises, the raw material for which is a pre-enriched iron ore concentrate with a mass fraction of total iron more than 69.5%. The purpose of applied research is to improve the quality of magnetite concentrate by refining the technology of ore enrichment. The main research methods were adopted: analysis of traditional technological schemes of additional ore enrichment selection a new processing equipment for apparatus circuits, analysis of the results of semi-industrial research of apparatuses at ore procissing enterprises of the KMA. The paper identifies the main directions for improving magnetite ore concentrates by means of preliminary fine screening in combination with subsequent refinement and improvement of the deslamationation process before the last stage of magnetic separation procedure. Additional ore enrichment using fine screening at the inlet allows to reduce the load on the mill (about 80% of the material is removed from the grinding operation), as well as to reduce the amount of silicon dioxide in the product, which affects the quality characteristics of briquettes. Replacing MD-9 deslamators with MGS-9 hydraulic separators increases the iron content in the sands by 1.0 – 2.0% while reducing it in the tailings by 2.0 – 2.5% without additional running costs for water, electricity and fast-wearing parts.

Key words: re-enriched iron ore concentrate fine screening screen deslimer hydraulic separator

Receiving date: 15.08.2023

Approval date: 31.10.2023

Publication date: 29.11.2023

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