Theoretical Characterization of Steady-state Heat Wave Propagating in Iron Ore Sintering Bed

Nakano, Masami; Katayama, Kazuaki; Kasama, Shunji

doi:10.2355/isijinternational.50.1054

Cited by 6 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CO-C can also enhance the productivity of sintering machine. Nakano et al 12) has offered an equation to estimate heat front speed as v(1 + 576/Tig). Based on the Tig change from 979 K for SC to 947 K for CO-C, the effect accounts for 2.3% increase in the heat front speed.…”

Section: Estimation Of Effects On Sintering Heat Wavementioning

confidence: 99%

Effect of Granule Structure on the Combustion Behavior of Coke Breeze for Iron Ore Sintering

et al. 2013

Self Cite

View full text Add to dashboard Cite

In order to improve the coke combustion efficiency during iron ore sintering, the effect of coke granule structure was investigated with a TG-DTA and a new combination heating equipment capable of establishing similar heating pattern to the actual sintering bed. The results were analyzed as a function of granule type and neighboring specie as follows:The granule type was crucial to the combustion behavior of granules. On the other hand, the effect of neighbors was distinct over core coke particles; meanwhile, the effect remained uncertain in pellet type granules. The authors recommend composite type granules (fine coke particles adhering on a core particle) for the best choice. The type should bring 1.2% save of coke consumption and 2.3% increase in the heat front speed in comparison to coke particles of single type.

show abstract

Section: Estimation Of Effects On Sintering Heat Wavementioning

confidence: 99%

Effect of Granule Structure on the Combustion Behavior of Coke Breeze for Iron Ore Sintering

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rotary kilns are also used for producing sponge iron or direct reduced iron (Feinman and Mac Rae, 1999), cement (Peray, 1984;Mastorakos et al, 1999;Majumdar et al, 2007), for waste incineration (Marias, 2003;Yang et al, 2003), and for combustion or pyrolysis of coal (Patisson et al, 2000a(Patisson et al, , 2000bLi et al, 2003), maize (Klose and Weist, 1999), etc. Moving packed bed reactors are employed for sintering of iron or zinc ores (Chatterjee et al, 1993;Nakano et al, 2010;Ahn et al, 2013), for induration of iron ore pellets on a moving or traveling grate or strand (Thurlby et al, 1979;Barati, 2008;Sadrnezhaad et al, 2008), and for gasification of coal (Yoon et al, 1979;Hobbs et al, 1992). The blast furnace, a moving bed reactor, is utilized for making hot metal or liquid iron in an integrated steel plant (Omori, 1987;Ueda et al, 2010a).…”

Section: Introductionmentioning

confidence: 99%

Model-Based Optimization of Industrial Gas-Solid Reactors

Runkana

2015

KONA

View full text Add to dashboard Cite

Heterogeneous non-catalytic gas-solid reactors are commonly used in the production of chemicals, metals and metal oxides, for example, rotary drum reactor for producing quick lime; blast furnace, a moving bed reactor for producing iron, etc. Industrial processes involve multicomponent mixtures of solids as most of the naturally occurring materials such as minerals are multicomponent in nature. Generally the raw materials are heterogeneous and their physical and chemical characteristics vary from one source to another. The solid particles are also usually moist, the moisture content varying from season to season. The physico-chemical phenomena that take place in these reactors include flow of gases through porous media, heat transfer between the gases, solids, equipment and the environment, evaporation and condensation of moisture, reactions between gases and solids and within a single phase, melting and solidification depending on the temperatures inside the reactor, etc. The flow of particles is also of great importance especially in rotary drum and moving bed reactors. General features of the mathematical models for non-catalytic reactors are described along with models for the phenomena mentioned above. Case studies from the iron and steel industry on model-based optimization of production of direct reduced iron in a rotary kiln and induration of wet iron ore pellets on a moving packed bed reactor are discussed here.

show abstract

“…6 are calculated by solving eq. (7) for each phase, with the temperatures of each phase as incognita (Yamaoka et al 2005, Castro et al 2005, Nakano et al, 2010, Kamijo et al 2009 ( )…”

Section: Momentum and Energy Transfermentioning

confidence: 99%

“…In addition, in this machine concept , part of the process gas is reutilized in a pre-combustion chamber with natural gas with ignition burners to keep heat supplying on the surface of the sinter strand and enlarge the heat affected zone. The physicochemical and thermal phenomena involved in this process are complex and numerous ( Nakano et al, 2010, Kamijo et al 2009, Kasai et al 2008. Special mention is made to the phenomena of gas flow through the porous bed, gas-solid heat transfer, drying, vaporization and several chemical reactions and phase transformations (Umekage et al 2009, Cieplik, 2003, Cores et al 2010.…”

Section: Introductionmentioning

confidence: 99%