Methods of Creating a Layered System from Ore-Flux-Fuel Compositions with a Higher Content of Solid Fuel

Four methods of obtaining pellets with fluxing ore compositions with higher content of solid fuel, based on the combination of feedstock sintering process and sintering at a temperature of 1593–1598 K, namely: 1) a method wherein the solid fuel was mixed with the initial charge materials directly before agglomeration; 2) a method wherein the solid fuel was rolled on the surface of granules of size 10–15 mm, and after that pellets were burned out; 3) the method in which varying particles solid fuel (50 %) were also mixed with the raw materials before sintering, while the second part of them – was rolled on the surface of the granules, followed by imitation of the pellets real process of mixing with solid fuel in a drum mixer; 4) the method in which a solid fuel in an amount of 40 % was mixed with raw materials before sintering were experimentally investigated. Compression strength of burned out fluxing pellets with the higher content of powdered solid fuel, is changed within 1,9–2,45 kN/pellet and is not characterized as high index though it exceeds the requirements of GOST on 0,5–0,95 kN/pellet. The content of iron monoxide (FeO) and iron metal (Femet) in fluxed pellets after burning out was found and it was established, that FeO va¬ries in range of 21,5–27,2 %, whereas Femet varies in range of 11,2–18,9 %. The maximum increase of these indexes was observed in the burned out pellets made according to the fourth method. Increasing the content of iron monoxide and, particularly, iron in the compact metallic charge materials indicates that the use of such technology is accompanied by the increasing of the hematite dissociation degree and plating in the final product and improving its metallurgical properties.

Publication year: 
2013
Issue: 
6
УДК: 
621.745.55
С. 73–77., Іл. 3. Бібліогр.: 7 назв.
References: 

1. Перегудов В.В., Грицина А.Е., Драгун Б.Т. Современное состояние и перспективы развития железорудной промышленности Украины // Металлургическая и горнорудная промышленность. — 2010. — № 2. — С. 12—16.
2. Исследование некоторых закономерностей процесса окомкования гематитовых концентратов / И.С. Вохлякова, С.И. Покаленко, Р.А. Полуяхтов и др. // Сталь. — 2010. — № 9. — С. 30—32.
3. Ладыгичев М.Г., Майзель Г.М., Баранов М.С. Особенности тепловой обработки окатышей с добавкой в шихту твердого топлива. Сообщение 1 и 2 // Теплотехнические исследования процессов и агрегатов в черной металлургии. — М.: Металлургия, 1986. — С. 17—21.
4. О применении твердого топлива на обжиговых машинах / С.Н. Евстюгин, В.И. Клейн, В.В. Брагин и др. // Сталь. — 2009. — № 8. — С. 8—11.
5. Модель М.С., Лядова В.Я., Чугунова Н.В. Ферритообразование в железорудном сырье. — М.: Наука, 1990. — 152 с.
6. Першуков А.А., Соболев А.В. Справочник рабочего фабрики окомкования. — Челябинск: Металлургия, 1988. — С. 36—49.
7. Юрьев Б.П., Спирин Н.А. Результаты исследования процесса окисления железорудных окатышей // Сталь. — 2011. — № 9. — С. 9—12.

References [transliteration]: 

1. Peregudov V.V., Grit͡sina A.E., Dragun B.T. Sovremennoe sostoi͡anie i perspektivy razvitii͡a zhelezorudnoĭ promyshlennosti Ukrainy // Metallurgicheskai͡a i gornorudnai͡a promyshlennost'. – 2010. – # 2. – S. 12–16.
2. Issledovanie nekotorykh zakonomernosteĭ prot͡sessa okomkovanii͡a gematitovykh kont͡sentratov / I.S. Vokhli͡akova, S.I. Pokalenko, R.A. Polui͡akhtov i dr. // Stal'. – 2010. – # 9. – S. 30–32.
3. Ladygichev M.G., Maĭzel' G.M., Baranov M.S. Osobennosti teplovoĭ obrabotki okatysheĭ s dobavkoĭ v shikhtu tverdogo topliva. Soobshchenie 1 i 2 // Teplotekhnicheskie issledovanii͡a prot͡sessov i agregatov v chernoĭ metallurgii. – M.: Metallurgii͡a, 1986. – S. 17–21.
4. O primenenii tverdogo topliva na obzhigovykh mashinakh / S.N. Evsti͡ugin, V.I. Kleĭn, V.V. Bragin i dr. // Stal'. – 2009. – # 8. – S. 8–11.
5. Model' M.S., Li͡adova V.I͡A., Chugunova N.V. Ferritoobrazovanie v zhelezorudnom syr'e. – M.: Nauka, 1990. – 152 s.
6. Pershukov A.A., Sobolev A.V. Spravochnik rabochego fabriki okomkovanii͡a. – Cheli͡abinsk: Metallurgii͡a, 1988. – S. 36–49.
7. I͡Ur'ev B.P., Spirin N.A. Rezul'taty issledovanii͡a prot͡sessa okislenii͡a zhelezorudnykh okatysheĭ // Stal'. – 2011. – # 9. – S. 9–12.

AttachmentSize
2013-6-10.pdf198.84 KB

Тематичні розділи журналу

,