Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/74998
Title: ИЗМЕНЕНИЕ ЭКВИВАЛЕНТНОЙ ПОРОЗНОСТИ СЛОЯ ОКАТЫШЕЙ ПО ДЛИНЕ ОБЖИГОВОЙ КОНВЕЙЕРНОЙ МАШИНЫ
Other Titles: Change of equivalent layer porosity of pellets along the length of burning conveyor machine
Authors: Yur’ev, B. P.
Gol’tsev, V. A.
Юрьев, Б. П.
Гольцев, В. А.
Issue Date: 2017
Publisher: National University of Science and Technology MISIS
Национальный исследовательский технологический университет МИСиС
Citation: Юрьев Б. П. ИЗМЕНЕНИЕ ЭКВИВАЛЕНТНОЙ ПОРОЗНОСТИ СЛОЯ ОКАТЫШЕЙ ПО ДЛИНЕ ОБЖИГОВОЙ КОНВЕЙЕРНОЙ МАШИНЫ / Б. П. Юрьев, В. А. Гольцев // Известия высших учебных заведений. Черная металлургия. — 2017. — Т. 60. — №. 2. — С. 116-123.
Abstract: Difficulties in determining the flow resistance of layer of pellets in the burning conveyor type machines during the heat treatment, associated with significant changes in the layer structure due to its shrinkage during the drying process, the low strength of raw pellets, adjustment layer segregation, sintering and melting of pellets, were considered. As a result, flow resistance of pellets layer on conveyor machines greatly exceeds the resistance value which is obtained in laboratory tests of gas dynamics of pellet layer. According to the impact of many factors on the structure of a burnt pellets layer, which can be taken into account only in their cumulative effect, the authors have introduced the concept of an equivalent porosity. As a result of calculating the amount of equivalent porosity with the available literature data and the data obtained in working out the pellets burning technology in a high layer on Kachkanar conveyor machines, a pattern of its distribution along the length of the conveyor machine was revealed. It was established that most significantly the porosity of the layer reduce due to layer shrinkage in the drying zone and cracking of pellets at the outlet of it. The analysis of estimated expressions to determine the gas-dynamic characteristics of the pellets layer helped to get the dependencies that with a sufficient degree of accuracy can be used to calculate the gas-dynamic characteristics of the layer on the conveyor machines considering different porosity. The obtained results can be used in determining the gas dynamic and thermal conditions, providing work of burning conveyor machines with low specific fuel consumption and high quality of the calcined product. © 2017, National University of Science and Technology MISIS. All rights reserved.
Keywords: BURNING CONVEYOR MACHINE
COEFFICIENT OF FLOW RESISTANCE
EQUIVALENT POROSITY
FUEL CONSUMPTION
HEAT TREATMENT
IRON ORE PELLETS
MODE
PARAMETERS
QUALITY
ZONE
URI: http://hdl.handle.net/10995/74998
metadata.dc.rights: info:eu-repo/semantics/openAccess
RSCI ID: 28352314
SCOPUS ID: 85026356339
PURE ID: 1973015
ISSN: 0368-0797
DOI: 10.17073/0368-0797-2017-2-116-123
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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