{"id":1680,"date":"2020-12-15T11:10:51","date_gmt":"2020-12-15T09:10:51","guid":{"rendered":"https:\/\/jrn.isi.gov.ua\/?page_id=1680"},"modified":"2023-08-12T21:01:45","modified_gmt":"2023-08-12T18:01:45","slug":"1680-2","status":"publish","type":"page","link":"https:\/\/jrn.isi.gov.ua\/?page_id=1680&lang=en","title":{"rendered":"DOI: 10.52150\/2522-9117-2019-33-78-86"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Shevchenko Serhiy Anatoliyovych,<\/strong> Ph.D., Senior Researcher, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: shev_serg@i.ua, ORSID 0000-0002-9287-9177
\nShevchenko Anatoliy Pylypovych,<\/strong> Dr. Sci. (Engin.), Professor, Leading Researcher, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; email: ovoch-isi@outlook.com, ORCID 0000-0003-0867-6825
\nTolstopyat A.P., <\/strong>Dnipropetrovsk National University
\nFleyer L.A., <\/strong>Dnipropetrovsk National University
\nYeliseyev V.I., <\/strong>Dnipropetrovsk National University<\/p>\n

THE STUDY OF THE VELOCITY OF DISPERSED PARTICLES <\/strong>AT DIFFERENT ANGLES OF DIVISION OF A TWO-PHASE FLOW<\/strong><\/h3>\n

Summary.<\/strong> The aim of this work is to assess the influence of a t-shaped divider (\u03b1 = 180\u00b0) on the speed of movement of spherical particles along the path of a two-nozzle lance in the air stream. Also, comparison with the results of flow separation experiments at smaller angles. The performed studies showed that in the t-shaped divider the reagent particles have a complex trajectory of motion. Part of the particles has an outflow velocity corresponding to other types of divider (7 \u2013 14 m\/sec), and the other equilibrium part of the particles is slowed down and has an outflow speed 4 \u2013 5 times lower (1 \u2013 3 m\/sec). This is reflected by the bimodal nature of the distribution of the results. In this regard, the transition from single particles to a denser flow (in the case of an increase in the reagent supply intensity) will lead to instability of the injection process, to pulsations and even blocking of the lance. This under conditions of flow into the melt will lead to blockage of the nozzle. This is confirmed by individual attempts to inject granular magnesium through a tshaped lance in cast iron desulfurization plants. In this case, magnesium was introduced with overestimated flow rates of the transporting gas and an intensity of no more than 5\u20136 kg\/min, which is 5 times less than through a y-shaped two-nozzle lance. In addition, the injection was carried out through one
\nnozzle, since the other in the first seconds of the release of magnesium was clogged. The process proceeded violently and was accompanied by splashes of cast iron from the ladle. It is established that, in comparison with the flow separation angles (alfa = 30\u00b0, 60\u00b0, 90\u00b0), the t-shaped divider (alfa= 180\u00b0) reduces
\nthe speed of magnesium and polystyrene particles to a greater extent (by 20 \u2013 50%). In addition, the physical characteristics of the interacting materials, the shape of the particles, the flow rate of the transporting gas, and the length of the 79 nozzle after the divider significantly affect the speed of movement of a solid particle along the path of a two-nozzle lance.
\nKeywords:<\/strong> iron desulfurization, magnesium, injection, tuyere, flow divider.<\/p>\n

References<\/strong>
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\n2. Tolstotyap A.P. Eksperimentalnoye opredelenie skorosti chastits dvuhfaznogo potoka (gaz-tv.) v truboprovode s delitelem \/ A.P. Tolstotyap, V.E. Davidson, L.A. Fleer, V.I. Eliseev, T.A. Ruzova, I.A. Manachin,
\nA.F. Shevchenko, S.A. Shevchenko]. \u00abFundamental’nyye i prikladnyye problemy chernoy metallurgii\u00bb. Sbornik nauchnykh statey ISI NANU. \u2013 Dnepropetrovsk. \u2013 2012. \u2013 Vyp.25. \u2013 S. 123\u2013130.
\n3. Ruzova T.A., Tolstotyap A.P., Fleer L.A. Metod eksperimentalnogo opredeleniya skorostey chastits v dvuhfaznom potoke. Naukoviy visnik Natsionalnogo girnichogo universitetu. \u2013 Dnepropetrovsk. \u2013 2012. \u2013 \u2116 3. \u2013 S. 107\u2013113.
\n4. VI Mizhnarodniy simpozium po desulfuratsii chuguna i stali: Sb. Dokladov. Magdeburg \u2013 Germaniya. 14-16 sentyabrya 2000 g. \u2013 138 s.<\/p>\n","protected":false},"excerpt":{"rendered":"

Shevchenko Serhiy Anatoliyovych, Ph.D., Senior Researcher, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: shev_serg@i.ua, ORSID 0000-0002-9287-9177 Shevchenko Anatoliy Pylypovych, Dr. Sci. (Engin.), Professor, Leading Researcher, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1680","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/1680","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1680"}],"version-history":[{"count":4,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/1680\/revisions"}],"predecessor-version":[{"id":3908,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/1680\/revisions\/3908"}],"wp:attachment":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}