Improvement of the filtration process of iron ore magnetic concentrate of PJSC "CGZK" to provide the pelletizing plant with raw materials for DRI pellets

Tetiana Oliіnyk A. Petelka Liudmyla Skliar
Received 18.12.2023, Revised 27.03.2024, Accepted 26.04.2024
Abstract

The aim of the study is to determine the possibility of producing a concentrate with quality and moisture suitable for the production of iron ore pellets, which are raw materials for the direct reduction of iron (DRI) technology at domestic enterprises, in particular, ensuring the mass fraction of concentrate moisture in a controlled range from 8.2 to 9.5%, which allows for the stable production of pellets with high quality indicators. The research methods are experimental methods, which include comparing different modes of operation of fabric disc vacuum filters DU-100-2.5 and ceramic vacuum filters KDF-90 that dewater finely ground iron ore concentrate produced by PJSC "CGZK". The scientific novelty is determined in a new approach to the dewatering of iron ore concentrate PJSC "CGZK" for further application, as raw materials, for the production of iron ore pellets. The approach includes the use of ceramic vacuum filters KDF-90 to ensure the stable release of concentrate with a mass fraction of moisture in a controlled range. The practical significance of the study is that its results can be used by domestic enterprises to analyze the possibility and efficiency of replacing the existing front of fabric filtration of iron ore concentrate with ceramic disc vacuum filters, the operating parameters of which allow to ensure the residual moisture of iron ore concentrate, which is suitable for use in pelletizing and firing DR pellets. Replacing equipment and achieving stable quality parameters of iron ore concentrate allows entering new, high-profit markets for concentrates and pellets. The results of the study are the conclusion that the use of ceramic vacuum filters KDF-90 allows to ensure high filtration efficiency, process stability, durability, and environmental cleanliness. In particular, it has been established that KDF-90 filters provide productivity and moisture indicators of the concentrate necessary for pellet production at the level of 0.6...0.8 t/m2 and 8.2...9.5% respectively. The use of these filters allows to ensure process stability and controllability, reduce energy and resource costs

Keywords:
direct reduction of iron; DRI; iron ore pellets; vacuum filtration; DU-100-2.5; ceramic vacuum filters; KDF-90

Retrieved from Vol. 58, No. 1, 2024

Pages 137–143

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Oliіnyk, T., Petelka, A., & Skliar, L. (2024). Improvement of the filtration process of iron ore magnetic concentrate of PJSC "CGZK" to provide the pelletizing plant with raw materials for DRI pellets. Mining Journal of Kryvyi Rih National University, 58(1), 137-143. https://doi.org/10.31721/2306-5435-2024-1-112-137-144
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