Demanganisation of high manganese pig iron to produce high manganese slag

El-Faramawy, Hoda; Mattar, Taha; Eissa, Mamdouh; El-Fawakhry, Kamal

doi:10.1179/030192304225012123

Cited by 19 publications

(14 citation statements)

References 3 publications

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“…5 In this technique, various high manganese pig iron melts (4-7%Mn) with differing [Si]/[Mn] contents (0 . 2-0 .…”

Section: Methodsmentioning

confidence: 99%

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Silicomanganese production from manganese rich slag

El-Faramawy¹,

Mattar²,

Fathy³

et al. 2004

Ironmaking & Steelmaking

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Manganese rich slag produced by the appropriate treatment of high manganese pig iron has a high manganese content and results in low fines, is low cost and gives low excess oxygen. Manganese recovery from this slag in the form of manganese ferroalloys compensates for the excess cost of the treatment process. Manganese rich slags produced from the injection of high manganese pig iron under at optimum conditions have levels of (Mn).35 wt-%, (Mn)/(Fe).7 . 65, (Mn)/(Si).2 and (Mn)/(P).285, which satisfy requirements for use as raw material in silicomanganese alloy production. Various experiments were carried out to smelt high manganese slag resulting from the treatment of high manganese pig iron to produce silicomanganese in a bench scale submerged electric arc furnace. Use of such manganese rich slag in the proportion of 40% of the blend has been found to be optimum to obtain a silicomanganese alloy with the highest metallic yield and highest manganese recovery. The silicomanganese alloy produced satisfies the standard chemical specifications, with manganese and silicon contents 68 and 18%, respectively.

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“…5 In this technique, various high manganese pig iron melts (4-7%Mn) with differing [Si]/[Mn] contents (0 . 2-0 .…”

Section: Methodsmentioning

confidence: 99%

“…5 Furthermore, the manganese distribution between slag and molten iron has been also investigated. 6 Manganese recovery from the slag produced, in the form of manganese ferroalloys, compensates for the excess cost of the treatment process.…”

Section: Introductionmentioning

confidence: 99%

Silicomanganese production from manganese rich slag

El-Faramawy¹,

Mattar²,

Fathy³

et al. 2004

Ironmaking & Steelmaking

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“…According to Pihura et al [6], the maximum content of manganese in iron ores exploited for the steelmaking must not be more than 4wt.%Mn. The high content of manganese in the studied iron ore will cause increasing the consumed quantity of coke during the reduction process and a detrimental effect on the productivity and life time of the blast furnace [17]. So, the studied highMn iron ore is not suitable for the direct metallurgical exploitation.…”

Section: Chemical Characterizationmentioning

confidence: 97%

Characterization and Exploitation of El-Gedida High-Mn Iron Ore, El-Bahariya Oasis, Western Desert, Egypt

El-Habaak¹

2016

AJEE

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Two strategies have been chosen for the exploitation of El-Gedida high-Mn iron ore containing 46.37 wt.% Fe and 7.53 wt.%Mn. The first one included magnetic roasting and subsequent low intensity magnetic separation. The second strategy involved a blend process of the El-Gedida high-Mn iron ore with the Um Bogma manganese ore. The magnetic separation failed to reduce the Mn content up to 4 wt.% and produced iron concentrate containing 52.15 wt.% Fe with a recovery of 94.47% and 6.45 wt.% Mn with a recovery of 71.95%. At this point, the magnetic separation is considered to be unsuitable process for upgrading the high-Mn iron ore. Moreover, this physical separation supported the microscopic prediction regarding the difficult liberation of iron minerals from manganese phase during the comminution process. On the other hand, blending the high-Mn iron ore with the Um Bogma manganese ore at weight ratio of 1/6 (El-Gedida sample/Um Bogma sample) produced a suitable mixture for making the ferromanganese alloys.

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“…In addition to that, there are particular problems with pig iron that has manganese content above 1 %. The higher Mn content in hot metal during the oxidation process influences the formation of slag and causes serious problems for the technology [14][15]. Indeed, a large quantity of slag is obtained that decreases the yield and increases the splashing [15].…”

Section: Introductionmentioning

confidence: 99%

Production of Lamellar Cast Iron EN-GJL-150 From Local Manganese-Rich Pig Iron by Modification of the Melting Process

Sitouah

Cherfi

Oualit

et al. 2022

Advances in Materials Science

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In the present study, a modified duplex melting process was set up so as to be able to produce an EN-GJL-150 gray cast iron from a local manganese-rich pig iron. A descriptive statistics showed an average Mn and Si content in raw material such that: Mn % = 2.457±0.133 and Si % = 0.682±0.088. The demanganization process was run and monitored in a cascade of two industrial-scale furnaces: a rotary kiln and an electric arc furnace. The performed experiments indicated that: 1) the manganese content decreased from 2.45 % to 0.94 %, 2) the manganese oxidation obeys the first order kinetic model, 3) Brinell and Rockwell hardness’s decreased by 38.83% and 27.81% respectively, and 4) the produced cast iron has a pearlitic microstructure with a small fraction of ferrite (1 to 5%) in the matrix and traces of cementite. All results showed that the produced castings comply with the standards in force for EN-GJL-150 cast irons, similar to gray cast iron ASTM A48 Class 20.

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Demanganisation of high manganese pig iron to produce high manganese slag

Cited by 19 publications

References 3 publications

Silicomanganese production from manganese rich slag

Silicomanganese production from manganese rich slag

Characterization and Exploitation of El-Gedida High-Mn Iron Ore, El-Bahariya Oasis, Western Desert, Egypt

Production of Lamellar Cast Iron EN-GJL-150 From Local Manganese-Rich Pig Iron by Modification of the Melting Process

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