Greenhouse-gas (CO2) emissions in the steel industry

Lisienko, V. G.; Lapteva, A. V.; Chesnokov, Yu. N.; Lugovkin, V.V.

doi:10.3103/s0967091215090107

Cited by 13 publications

(3 citation statements)

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“…Liesienko et al [5] characterised various iron-and steel-making processes according to their CO 2 emission. The integrated Hyl 3 Energiron electric arc furnace process route generates 1171 kg of CO 2 emissions per ton of steel, which is the minimum among all the steel-making processes.…”

Section: Introductionmentioning

confidence: 99%

Slag Formation during Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction

et al. 2020

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Replacing carbon by hydrogen is a huge step towards reducing CO2 emissions in the iron- and steel-making industry. The reduction of iron oxides using hydrogen plasma smelting reduction as an alternative to conventional steel-making routes has been studied at Montanuniversitaet Leoben, Austria. The aim of this work was to study the slag formation during the reduction process and the reduction behaviour of iron oxides. Furthermore the reduction behaviour of iron ore during continuous feeding was assessed. Mixtures of iron ore and calcined lime with a basicity of 0, 0.8, 1.6, 2.3, and 2.9 were melted and reduced by hydrogen. The off-gas composition was measured during the operations to calculate the process parameters. The reduction parameters, namely the degree of reduction, degree of hydrogen utilisation, produced iron, and slag, are presented. The results of the batch-charged experiments showed that at the beginning of the reduction process, the degree of hydrogen utilisation was high, and then, it decreased over the operation time. In contrast, during the continuous-feeding experiment, the degree of hydrogen utilisation could be kept approximately constant. The highest degrees of reduction and hydrogen utilisation were obtained upon the application of a slag with a basicity of 2.3. The experiment showed that upon the continuous feeding of iron ore, the best conditions for the reduction process using hydrogen could be applied.

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Section: Introductionmentioning

confidence: 99%

Slag Formation during Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Liesienko et al [5] characterised various iron-and steel-making processes according to their CO2 emission. The integrated Hyl 3 Energiron electric arc furnace process route generates 1171 kg of CO2 emissions per ton of steel, which is the minimum among all the steel-making processes.…”

Section: Introductionmentioning

confidence: 99%

Slag Formation During Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction

Seftejani

Schenk

Spreitzer

et al. 2020

Preprint

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Replacing carbon by hydrogen is a huge step towards reducing CO2 emissions in the iron- and steel-making industry. The reduction of iron oxides using hydrogen plasma smelting reduction as an alternative to conventional steel-making routes has been studied at Montanuniversitaet Leoben, Austria. The aim of this work was to study the slag formation during the reduction process and the reduction behaviour of iron oxides. Furthermore, the reduction behaviour of iron ore during continuous feeding was assessed. Mixtures of iron ore and calcined lime with a basicity of 0, 0.8, 1.6, 2.3, and 2.9 were melted and reduced by hydrogen. The off-gas composition was measured during the operations to calculate the process parameters. The reduction parameters, namely the degree of reduction, degree of hydrogen utilisation, produced iron, and slag, are presented. The results of the batch-charged experiments showed that at the beginning of the reduction process, the degree of hydrogen utilisation was high, and then, it decreased over the operation time. In contrast, during the continuous-feeding experiment, the degree of hydrogen utilisation could be kept approximately constant. The highest degrees of reduction and hydrogen utilisation were obtained upon the application of a slag with a basicity of 2.3. The experiment showed that upon the continuous feeding of iron ore, the best conditions for the reduction process using hydrogen could be applied.

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“…To produce one ton of liquid steel by the integrated BF-BOF route, 2120 kg and by the paired HYL 3-EAF 1125 kg of CO 2 is emitted [5]. For the recycling of 100% scrap by EAF, 466 kg CO 2 /t liquid steel is produced [6].…”

Section: Introductionmentioning

confidence: 99%

Reduction of Haematite Using Hydrogen Thermal Plasma

2019

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The development of hydrogen plasma smelting reduction as a CO2 emission-free steel-making process is a promising approach. This study presents a concept of the reduction of haematite using hydrogen thermal plasma. A laboratory scale and pilot scale hydrogen plasma smelting reduction (HPSR) process are introduced. To assess the reduction behaviour of haematite, a series of experiments have been conducted and the main parameters of the reduction behaviour, namely the degree of hydrogen utilization, degree of reduction and the reduction rate are discussed. The thermodynamic aspect of the hematite reduction is considered, and the pertinent calculations were carried out using FactSageTM 7.2. The degree of hydrogen utilization and the degree of reduction were calculated using the off-gas chemical composition. The contribution of carbon, introduced from the graphite electrode, ignition pin and steel crucible, to the reduction reactions was studied. The degree of reduction of haematite, regarding H2O, CO and CO2 as the gaseous reduction products, was determined. It is shown that the degree of hydrogen utilization and the reduction rate were high at the beginning of the experiments, then decreased during the reduction process owing to the diminishing of iron oxide. Conducting experiments with the high basicity of slag B2 = 2 led to a decrease of the phosphorus concentration in the produced iron.

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Greenhouse-gas (CO2) emissions in the steel industry

Cited by 13 publications

References 0 publications

Slag Formation during Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction

Slag Formation during Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction

Slag Formation During Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction

Reduction of Haematite Using Hydrogen Thermal Plasma

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