Simulation of Thermal Decomposition of Partially Calcined Spherical Limestone Injected into a Molten Iron Bath

AbstractThe amount of dust produced from the blast furnace is very large, and this paper proposed a new method for comprehensive utilization of blast furnace dust. Firstly, cold bonded agglomerates directly put into the iron groove were made by blast furnace dust. The cold bonded agglomerates were reduced and melted by the energy of molten iron, and the valuable elements such as Fe reduced into molten iron and zinc existed in rich-Zn dust in the cold bonded agglomerates could be recovered. In order to simulate this process, the reduction behavior of cold bonded agglomerate in the iron bath was studied, and the reduction mechanism were analyzed by Factsage calculation and SEM-EDS. The results showed that: in the slag phase, there were small metallic iron particles dispersed and hard to gather. The main reason for this phenomenon is due to the hindrance role of the carbon residue in the agglomerates, and the problem could be solved through adding magnetite concentrate in cold bonded agglomerates.

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X-ray Fluoroscopic Observation of Bubble Characteristics in a Molten Iron Bath.

ISIJ International ◽

10.2355/isijinternational.35.1354 ◽

1995 ◽

Vol 35 (11) ◽

pp. 1354-1361 ◽

Cited By ~ 41

Author(s):

Manabu Iguchi ◽

Tomoyuki Chihara ◽

Norihiro Takanashi ◽

Yuji Ogawa ◽

Naoki Tokumitsu ◽

...

Keyword(s):

Molten Iron ◽

X Ray ◽

Iron Bath ◽

Bubble Characteristics

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X-ray Fluoroscopic Observations of Bubble Characteristics in a Molten Iron Bath

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.80.7_515 ◽

1994 ◽

Vol 80 (7) ◽

pp. 515-520 ◽

Cited By ~ 6

Author(s):

Manabu IGUCHI ◽

Norihiro TAKANASHI ◽

Yuji OGAWA ◽

Naoki TOKUMITSU ◽

Zen-ichiro MORITA

Keyword(s):

Molten Iron ◽

X Ray ◽

Iron Bath ◽

Bubble Characteristics

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Desulfurization of Hot Metal Through In Situ Generation of Magnesium in 30-kg Molten Iron Bath-Influence of Inert Gas Flow Rate

steel research international ◽

10.1002/srin.201300374 ◽

2013 ◽

Vol 85 (5) ◽

pp. 927-934 ◽

Cited By ~ 4

Author(s):

Anil Kumar ◽

Zachariah Elanjickal Chacko ◽

Madurai Malathi ◽

Kesri Mino Godiwalla ◽

Satish Kumar Ajmani ◽

...

Keyword(s):

Flow Rate ◽

Gas Flow ◽

Molten Iron ◽

Inert Gas ◽

Gas Flow Rate ◽

Hot Metal ◽

In Situ Generation ◽

Iron Bath

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Fabrication of Lotus-Type Porous Iron by Thermal Decomposition Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.658.240 ◽

2010 ◽

Vol 658 ◽

pp. 240-243

Author(s):

Takuya Ide ◽

Takehiro Wada ◽

Hideo Nakajima

Keyword(s):

Thermal Decomposition ◽

Decomposition Method ◽

Solid Phase ◽

Zone Melting ◽

Molten Iron ◽

Porous Iron ◽

Transfer Velocity ◽

Thermal Decomposition Method ◽

Melting Technique ◽

Decomposition Behavior

Lotus-type porous iron was fabricated by continuous zone melting technique through thermal decomposition of chromium nitride(Cr1.18N). Nitrogen dissolves into the molten iron through thermal decomposition of Cr1.18N. When the molten iron is solidified in one direction, insoluble nitrogen forms the directional gas pores aligned along the solidification direction. The porosity increases with increasing transfer velocity. For most of lotus metals fabricated by pressurized gas method, the porosity does not change with the transfer velocity owing to constant gas solubility in liquid and solid phase. On the other hand, the porosity of lotus metal fabricated by thermal decomposition method depends on the transfer velocity. This difference is attributed to the decomposition behavior of gas compound dependent upon the heating rate.

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Coal gasification using a molten iron bath☆

Fuel ◽

10.1016/0016-2361(82)90105-3 ◽

1982 ◽

Vol 61 (10) ◽

pp. 1027-1031 ◽

Cited By ~ 1

Author(s):

S OKAMURA ◽

M SUEYASU ◽

M FUKUDA ◽

S FURUJO ◽

K OKANE

Keyword(s):

Coal Gasification ◽

Molten Iron ◽

Iron Bath

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Experimental assessment of the gray cast iron production by inoculant injection

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb200414035r ◽

2020 ◽

pp. 35-35

Author(s):

G. Reyes-Castellanos ◽

A. Cruz-Ramírez ◽

Hugo Gutiérrez-Pérez ◽

J.E. Rivera-Salinas ◽

R.G. Sánchez-Alvarado ◽

...

Keyword(s):

Cast Iron ◽

Gray Cast Iron ◽

Molten Iron ◽

Gray Cast ◽

Initial Assessment ◽

Melting Time ◽

Injection Technique ◽

Particle Sizes ◽

Cast Irons ◽

Iron Bath

An initial assessment of the gray cast irons production by injecting an inoculant with a conveying gas into a molten iron bath was evaluated at a laboratory scale. A numerical simulation was carried out to determine the hydrodynamic behavior between the inoculant particles injected into the molten iron. It was determined that an optimal interaction between the particles with the molten iron occurs at a lance depth of 7 cm and for the particle sizes fine (211 to 297 ?m) and medium (421 to 590 ?m), the residence time was of 0.38 and 0.4 s, respectively. The melting time was calculated at 0.0008 and 0.003 s for the particle sizes fine and medium, respectively. So, after injection, the FeSi of the inoculant melts quickly, releasing the elements of the inoculant which interact with the molten iron and forms oxides and sulfides creating nucleating sites during solidification. The injection technique allows obtaining a type-A graphite distribution for the fine and medium particle sizes. The number of eutectic cells was increased when the inoculant particle size was decreased despite of the low graphitisers elements, and manganese contents used in the gray cast iron manufacturing.

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