{"id":5495,"date":"2025-12-01T13:55:00","date_gmt":"2025-12-01T10:55:00","guid":{"rendered":"https:\/\/jrn.isi.gov.ua\/?page_id=5495"},"modified":"2026-03-27T22:46:37","modified_gmt":"2026-03-27T19:46:37","slug":"doi-10-52150-2522-9117-2025-39-01","status":"publish","type":"page","link":"https:\/\/jrn.isi.gov.ua\/?page_id=5495&lang=en","title":{"rendered":"DOI: 10.52150\/2522-9117-2025-39-01"},"content":{"rendered":"\n

R. M. Rudenko<\/strong>1,*<\/sup>, Ph. D. Student, ORCID 0009-0008-6207-0107
Ye. M. Sigarev<\/strong>1<\/sup>,D. Sc. (Tech.), Professor, Head of the Department of Metallurgy, ORCID 0000-0002-8229-7877
M. R. Rudenko<\/strong>1<\/sup>, Ph. D. (Tech.), Assoc. Prof., ORCID 0000-0002-8016-5221
M. A. Kashcheev<\/strong>1<\/sup>, <\/strong>Ph. D. (Tech.), Assoc. Prof., ORCID 0000-0002-0938-4384<\/p>\n\n\n\n

1 <\/sup>Dniprovsky State Technical University, Dniprobudivska St., 2, Kamianske, 51918, Ukraine<\/em><\/p>\n\n\n\n

* <\/sup><\/em><\/a>Corresponding author: <\/em>18rudenko@gmail.com<\/em><\/em><\/p>\n\n\n\n

IMPACT OF CAPILLARY MOISTURE UPTAKE ON THE FORMATION OF IRON ORE SINTER MIX GRANULES<\/strong><\/h2>\n\n\n\n

Abstract. <\/strong>The research focuses on determining main factors that affect quality granulation of iron ore sinter mix. Granulation is a crucial stage in sintering technology, since strength, size distribution, and gas permeability of granules directly influence bed resistance, flame front stability, and overall productivity the sintering machine. Based on both experimental studies and theoretical analysis, role of moisture content, drum operating parameters, and pore structure characteristics has been clarified. It has been demonstrated that preliminary granulation of fine fractions (dust, sludges, lime, and other secondary raw materials) significantly improves the uniformity granule structure. Capillary absorption tests showed that concentrates, ores, and waste products differ considerably in water uptake, which is mainly due to variations in pore radius. According to the Washburn equation, smaller pores limit penetration depth and reduce moisture distribution, whereas larger pores accelerate water movement and ensure better wetting of the charge. Calculated data indicate that at pore sizes of 5 \u03bcm the penetration depth does not exceed 2 mm within 10 s, while at 20 \u2013 40 \u03bcm moisture spreads several millimeters during the same period. These results confirm the necessity of pre-granulating fine wastes with poor wettability in order to stabilize the structure of the sinter mix. Optimization of granulation parameters has been carried out. The most favorable regime corresponds to a moisture content of 7.5 \u2013 9.0 %, drum speed of 12 \u2013 14 rpm, and fill degree of 22 \u2013 26 %. Under these conditions, strong and uniform granules with a dominant fraction of 3 \u2013 6 mm are formed. The fraction below 1 mm decreases from more than 40 % to approximately 24 %, which considerably lowers dust generation during sintering. The obtained results also prove that the use of preliminary granulation makes it possible to introduce up to 25 \u2013 30 % of secondary materials without deterioration of granule stability. At the same time, dust emissions are reduced by 5 \u2013 10 % and the environmental performance of sintering is improved. The novelty of this work consists in establishing the relationship between moisture absorption mechanisms and the stability of granules, and in proving the possibility of increasing the share of secondary raw materials in the charge while simultaneously reducing the ecological footprint of agglomeration.<\/p>\n\n\n\n

Key words<\/strong>: sinter mix; granulation; moisture content; capillary absorption; particle size distribution; bed permeability.<\/p>\n\n\n\n

For citation:<\/strong> Rudenko, R. M., Sigarev, Ye. M., Rudenko, M. R., & Kashcheev, M. A. (2025). Impact of capillary moisture uptake on the formation of iron ore sinter mix granules. Fundamental and applied problems of ferrous metallurgy<\/em>, 39, 4-19. https:\/\/doi.org\/10.52150\/2522-9117-2025-39-01<\/a><\/p>\n\n\n\n

References<\/strong><\/p>\n\n\n\n

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    Received  29.07.2025<\/em>
    Accepted 21.10.2025<\/em>
    Published online 01.12.2025<\/em><\/p>\n\n\n\n

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    R. M. Rudenko1,*, Ph. D. Student, ORCID 0009-0008-6207-0107Ye. M. Sigarev1,D. Sc. (Tech.), Professor, Head of the Department of Metallurgy, ORCID 0000-0002-8229-7877M. R. Rudenko1, Ph. D. (Tech.), Assoc. Prof., ORCID 0000-0002-8016-5221M. A. Kashcheev1, Ph. D. (Tech.), Assoc. Prof., ORCID 0000-0002-0938-4384 1 Dniprovsky State Technical University, Dniprobudivska St., 2, Kamianske, 51918, Ukraine * Corresponding author: 18rudenko@gmail.com IMPACT OF CAPILLARY […]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5495","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/5495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5495"}],"version-history":[{"count":7,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/5495\/revisions"}],"predecessor-version":[{"id":5879,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/5495\/revisions\/5879"}],"wp:attachment":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}