Using Water Hydrogen Instead of Reducing Gas in the Production of Direct Reduced Iron (DRI)

Ahmad, Jaleel Kareem

doi:10.1515/jaots-2010-0116

Cited by 5 publications

(2 citation statements)

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“…For a fast reaction to occur in a metallization, the molecule must be smaller. In this way, as is known, it can react very quickly [16]. Tsutsumi et al [17] suggested that the midrex process can be used to reduce energy consumption in DRI production.…”

Section: Literature Reviewmentioning

confidence: 99%

Selection of an Inert Gas System for the Transportation of Direct Reduced Iron

Yazır

Şahin

Alkac

2021

Mathematical Problems in Engineering

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Direct reduced iron (DRI) can create significant risks such as ignition, explosion, and fire because of the oxidation reaction in case when DRI undergoes spontaneously heating and comes in contact with oxygen or water. For this reason, the transportation of DRI is classified as a dangerous task of which the inert process should be done in the ship’s holds. Many studies have been conducted on the production and production stages of DRI and other areas of use of inert gas, but no studies have been conducted on the safe transportation of this cargo by ships. This study analyzes the criteria and alternatives for selecting the inert gas system for the benefits of investors and shipowners in the shipping industry. The intuitionistic fuzzy TOPSIS (IF-TOPSIS) method is implemented to conduct the decision-making process. As a result of this study, preferences for candidate inert gas systems are modelled. Port facility nitrogen generator is selected as the most suitable inert gas system among alternative inert gas systems based on predetermined criteria.

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Section: Literature Reviewmentioning

confidence: 99%

Selection of an Inert Gas System for the Transportation of Direct Reduced Iron

Yazır

Şahin

Alkac

2021

Mathematical Problems in Engineering

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“…Ahmad (38) Chakraborty (40) comenta em seu artigo sobre a cinética de redução da hematita para magnetita próxima a transição de Curie, no qual usou hidrogênio como gás redutor. Este experimento permitiu observar uma anomalia próxima à transição de Curie de contração relacionada com a energia magnética.…”

Section: -Processo De Redução Por Hunclassified

Estudo da influência da sinterização de minérios de ferro na redução por hidrogênio.

Telles¹

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This work aimed to study the sinter reduction by hydrogen produced with charcoal and coke breeze. Three kinds of hematitic sinter feeds were used. The materials were characterized by particle size analysis, chemical analysis, X-ray diffraction optical and scanning electron microscopy. The inicial sintering tests aimed to produce return fines for subsequent sintering. Mixtures adding the sinter feed residue from the pellets process were sintered to evaluate the addition effect of this product in the process of sintering. A test was conducted to verify the effect of elimination of fines present in the sinter return sintering process. Six sintering tests were conducted replacing coke breeze by charcoal as process fuel. The replacements were 0%, 8%, 16%, 25%, 50% and 100%. The samples with substitutions of 0%, 50% e 100% were reduced in thermobalance for 6 hours at a temperature of 1000°C using a blend of gases containing Argon-10% Hydrogen. The samples which presented the best and the worst reducibility were studied through kinect calculations to determine the reaction mechanisms involved during the reduction of oxide. The step of microscopic characterization of reduced sinters was carried out in a way that made possible to compare the sinter sample before and after the process of reduction. The results showed the sinter made with charcoal decrease the sinter rates of production and resistance. However, the sinter made using only charcoal as fuel presented better reducibility. The kinect calculation denotes both for the sinter made with charcoal and sinter made with coke breeze the controlling mechanism in the initial stages (between 50 and 55 minutes) is the chemical reaction. For the sinter produced with charcoal the controlling mechanism switches for mixed control. The sinter produced with coke breeze, the mechanism switches for diffusion. Tests interrupting the reduction time for 40min, 80min e 120min (40min + 40min + 40min) were produced with sinter sample produced with 8% with charcoal. At this stage it was possible to identify the phenomena of nucleation and growth phase of metallic iron on the sinter structure.

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Direct Reduced Iron: Most Efficient Technologies for Greenhouse Emissions Abatement

Cavaliere

2019

Clean Ironmaking and Steelmaking Processes

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Using Water Hydrogen Instead of Reducing Gas in the Production of Direct Reduced Iron (DRI)

Abstract: Oil rich countries are using natural gas as a source for reducing gas (H

Cited by 5 publications

References 0 publications

Selection of an Inert Gas System for the Transportation of Direct Reduced Iron

Selection of an Inert Gas System for the Transportation of Direct Reduced Iron

Estudo da influência da sinterização de minérios de ferro na redução por hidrogênio.

Direct Reduced Iron: Most Efficient Technologies for Greenhouse Emissions Abatement

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