BOF Steel Slag: Critical Assessment and Integrated Approach for Utilization

Alex, T C; Mucsi, Gábor; Venugopalan, T.; Kumar, Sanjay

doi:10.1007/s40831-021-00435-2

Cited by 24 publications

(3 citation statements)

References 84 publications

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“…[ 16 ] At the same time, other raw materials and electricity also generate carbon emissions, while the byproducts (BOF slag, off‐gas, and steam) can form carbon emission credit through recycling. [ 30 ] Figure 9a shows the contribution and total carbon emissions of different raw materials. It can be found that the contributions of HM and ferrochrome are 1658 and 1529 kg‐CO 2 per ton SS, respectively, reaching 52.9% and 48.8% of the total carbon emissions (3131 kg‐CO 2 per ton SS).…”

Section: Resultsmentioning

confidence: 99%

A Static Balance Model and Analysis of 430 Stainless Steel Produced by Basic Oxygen Furnace–Argon Oxygen Decarburization Furnace Process

Tian

Zhu

Zhou

et al. 2022

steel research int.

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Herein, a static mass and energy balance model of 430 stainless steel (SS) produced by the basic oxygen furnace (BOF)–argon oxygen decarburization furnace (AOD) process is established and verified by plant data. It is found that in the AOD, the energy input is efficiently utilized, the heat available for other uses is relatively low (4.0%), and the addition of SS scrap is limited. The high carbon content of dephosphorization hot metal (DPHM) and post‐combustion ratio (PCR) in AOD are conducive to promoting the recycling of SS scrap. In contrast, when the carbon content of DPHM and PCR is low, it is necessary to add an exothermic agent to the furnace. Due to the saving of nickel‐containing raw materials and China's high proportion of thermal power, the carbon emissions and energy consumption per ton 430 SS produced by the BOF–AOD process are 3131 kg‐CO2 and 24 161 MJ, which is much lower than per ton 304 SS produced by the electric arc furnace (EAF)–AOD process. Meaning the former is more conducive to the promotion of energy conservation and emission reduction.

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Section: Resultsmentioning

confidence: 99%

A Static Balance Model and Analysis of 430 Stainless Steel Produced by Basic Oxygen Furnace–Argon Oxygen Decarburization Furnace Process

Tian

Zhu

Zhou

et al. 2022

steel research int.

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show abstract

“…Therefore, natural aging is slow and time-consuming, occupying a large area of slag disposal yards to provide adequate stockpiling area [119,120].…”

Section: Natural Agingmentioning

confidence: 99%

Application of Steel Slag as an Aggregate in Concrete Production: A Review

Ren,

2023

Materials

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Steel slag is a solid waste produced in crude steel smelting, and a typical management option is stockpiling in slag disposal yards. Over the years, the massive production of steel slags and the continuous use of residue yards have led to vast occupation of land resources and caused severe environmental concerns. Steel slag particles can potentially be used as aggregates in concrete production. However, the volume stability of steel slag is poor, and the direct use of untreated steel slag aggregate (SSA) may cause cracking and spalling of concrete. The present research summarizes, analyzes, and compares the chemical, physical, and mechanical properties of steel slags. The mechanism and treatment methods of volume expansion are introduced, and the advantages, disadvantages, and applicable targets of these methods are discussed. Then, the latest research progress of steel slag aggregate concrete (SSAC) is reviewed. Using SSA leads to an increase in the density of concrete and a decrease in workability, but the mechanical properties and durability of SSAC are superior to natural aggregate concrete (NAC). Finally, future research in this field is proposed to motivate further studies and guide decision-making.

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“…One of the reasons is that it is restricted by technology and cost, and the phosphorus content in the slag does not match the phosphorus content of the desired use. By studying the influence of different conditions on the enrichment behaviour of phosphorus in steel slag, it can play a good role in promoting the rational utilization of steel slag and reducing the amount of steel slag [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effect of P₂O₅ addition on enrichment behaviour of phosphorus in CaO–SiO₂–FeO–P₂O₅ slag

Zhou

Chen

et al. 2022

Ironmaking & Steelmaking

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The CaO-SiO 2 -FeO-P 2 O 5 slag was measured by Raman spectra, and the changes in the structure and behaviour of phosphorus were analysed under different slag components. The results proved that phosphorus exists in two enrichment behaviours in the slag, which can be judged according to the mole fractions of Q 1 (Si), Q 2 (Si), and Q 3 (Si). When the content of P 2 O 5 increases from 4.5% to 8.5%, the Q 0 (P) intensity changes most significantly. Since the Fe-O bond energy (390.4 kJ mol −1 ) is weaker than the P-O (410 kJ mol −1 ) bond energy, the silicon-oxygen network structure will show a behaviour change of depolymerization first and then polymerization. XRD analysis shows that with the increase of P 2 O 5 content, different calcium silicate phases are added and decreased in the slag, and the content of a small amount of calcium ferrite phase changes, Si x O z− y bonds or separates from each other, which is consistent with the change law of Raman analysis.

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BOF Steel Slag: Critical Assessment and Integrated Approach for Utilization

Cited by 24 publications

References 84 publications

A Static Balance Model and Analysis of 430 Stainless Steel Produced by Basic Oxygen Furnace–Argon Oxygen Decarburization Furnace Process

A Static Balance Model and Analysis of 430 Stainless Steel Produced by Basic Oxygen Furnace–Argon Oxygen Decarburization Furnace Process

Application of Steel Slag as an Aggregate in Concrete Production: A Review

Effect of P₂O₅ addition on enrichment behaviour of phosphorus in CaO–SiO₂–FeO–P₂O₅ slag

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BOF Steel Slag: Critical Assessment and Integrated Approach for Utilization

Cited by 24 publications

References 84 publications

A Static Balance Model and Analysis of 430 Stainless Steel Produced by Basic Oxygen Furnace–Argon Oxygen Decarburization Furnace Process

A Static Balance Model and Analysis of 430 Stainless Steel Produced by Basic Oxygen Furnace–Argon Oxygen Decarburization Furnace Process

Application of Steel Slag as an Aggregate in Concrete Production: A Review

Effect of P2O5 addition on enrichment behaviour of phosphorus in CaO–SiO2–FeO–P2O5 slag

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Effect of P₂O₅ addition on enrichment behaviour of phosphorus in CaO–SiO₂–FeO–P₂O₅ slag