Investigation on the Reduction Behavior of Coal Composite Pellet at Temperatures between 1373 and 1573 K

Park, Hyun-Sik; Sohn, In Sook; Freislich, Michiel; Sahajwalla, Veena

doi:10.1002/srin.201600169

Cited by 6 publications

(8 citation statements)

References 18 publications

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“…respectively, made according to the Equations (15) and (16). As can be seen from Figure 5a,b, for both the upper side nozzle and the lower side nozzle, the experimental values have a considerable linear relationship with the calculated values.…”

Section: Resultsmentioning

confidence: 81%

“…After the parameters such as the injection velocity of the upper side nozzle and the lower side nozzle are respectively substituted into Equation 14, the data of multiple linear regression are shown in the Table 6: From Table 6, the equation of the mixing time of the upper side nozzle and the lower side nozzle and the similar number of Ca, La 1 can be obtained, respectively: (16) where V us is the injection velocity of the upper side nozzle, m•s −1 , V ls is the injection velocity of the lower side nozzle, m•s −1 . Figure 5a,b shows the relationship between the experimental value and the calculated value of the dimensionless group of the mixing time of the upper side nozzle and the lower side nozzle, respectively, made according to the Equations (15) and (16). As can be seen from Figure 5a,b, for both the upper side nozzle and the lower side nozzle, the experimental values have a considerable linear relationship with the calculated values.…”

Section: Resultsmentioning

confidence: 99%

“…You et al [14] used Sn-bearing complex iron ore via reduction with mixed H2/CO gas to prepare Snenriched direct reduced iron (DRI). In the behavior of reduction, Park et al [15,16] investigated the high-temperature behavior of a magnetite-coke composite pellet fluxed with dolomite by a customized thermogravimetric analyzer (TGA) at 1573 K (1300 °C) and the influence of different coal types on the reduction of the composite pellet. At the same time, previous research has proposed a new generation of C-H2 smelting reduction furnace (cf.…”

Section: Introductionmentioning

confidence: 99%

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Parametric Dimensional Analysis on a C-H2 Smelting Reduction Furnace with Double-Row Side Nozzles

2020

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Higher requirements for steel smelting technology have been put forward based on the increasing awareness of energy conservation and environmental protection. In the field of iron making, carbon reduction processes are often used. In this study, molten iron was smelted by designing a C-H2 smelting reduction method. Although previous researchers have studied this through a large number of physical and numerical simulations, they have not yet refined general laws from the perspective of dimensional analysis. In this paper, a double-row side blow hydraulics simulation was carried out in the C-H2 smelting reduction furnace, and an entire list of dimensionless groups of input and output parameters was proposed based on its hydraulics simulation data. The expressions between the dimensionless group of mixing time and dimensionless groups such as Capillary number (Ca) and Lagrange group (La1) were obtained by multiple linear regression based on the experimental research results and data analysis. By verifying the calculated and experimental values of the dimensionless group of mixing time, it can be seen that both have a good positive correlation. This study provides a better methodology for controlling key parameters and lays the foundation for the optimal design of the process parameters for the C-H2 smelting reduction furnace.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parametric Dimensional Analysis on a C-H2 Smelting Reduction Furnace with Double-Row Side Nozzles

2020

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“…Measured and model-predicted mass-loss fraction curves under different temperatures were compared, and the results are shown in Figure 3. In simulations, the briquette mass-loss fraction at time t was calculated using Equation (22).…”

Section: Briquette Mass Changementioning

confidence: 99%

“…The reaction kinetics of iron ore-carbon briquettes under inert atmosphere (nitrogen or argon) have been extensively studied, and their major features are well established [19][20][21][22]. The reduction of the briquette proceeds rapidly under high temperatures and generates a large amount of gas inside the briquette, making it more complicated than the reaction behavior of an iron ore or coal briquette.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Study of Ore-Carbon Briquette Reduction under CO–CO2 Atmosphere

Tang

Yun

et al. 2018

Metals

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Iron ore-carbon briquette is often used as the feed material in the production of sponge iron via coal-based direct reduction processes. In this article, an experimental and simulation study on the reduction behavior of a briquette that is made by hematite and devolatilized biochar fines under CO-CO 2 atmosphere was carried out. The reaction model was validated against the corresponding experimental measurements and observations. Modeling predictions and experimental results indicated that the CO-CO 2 atmosphere significantly influences the final reduction degree of the briquette. Increasing the reduction temperature did not increase the final reduction degree but was shown to increase the carbon that was consumed by the oxidative atmosphere. The influence of the CO-CO 2 atmosphere on the briquette reduction behavior was found to be insignificant in the early stage but became considerable in the later stage; near the time of the briquette reaching its maximum reduction degree, both iron oxide reduction and metallic iron re-oxidation were able to occur.

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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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Investigation on the Reduction Behavior of Coal Composite Pellet at Temperatures between 1373 and 1573 K

Cited by 6 publications

References 18 publications

Parametric Dimensional Analysis on a C-H2 Smelting Reduction Furnace with Double-Row Side Nozzles

Parametric Dimensional Analysis on a C-H2 Smelting Reduction Furnace with Double-Row Side Nozzles

Modeling and Experimental Study of Ore-Carbon Briquette Reduction under CO–CO2 Atmosphere

Direct Reduced Iron: Most Efficient Technologies for Greenhouse Emissions Abatement

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