Article
Metallurgy & Metallurgical Engineering
Li-li Wang, Yu-zhu Zhang, Yue Long
Summary: The dry slag granulation technique breaks up molten slag into droplets using supersonic air, impacting droplet diameter and waste heat recovery. Numerical simulation reveals a process involving film formation, wave appearance, and vortex structure generation.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Construction & Building Technology
Zhijun Chen, Liang Huang, Libo Yan, Heng Cai, Xiaofeng Luo, Yin Li
Summary: This study introduces a method to modify the volume stability of steel slag and develop autoclaved steel slag aggregates (ASA), and investigates their characteristics and the performance of concrete made with ASA. The results show that autoclaving treatments significantly change the characteristics of steel slag aggregates, and concrete containing ASA demonstrates better mechanical properties and durability performance compared to natural aggregate concrete. An optimal ASA replacement ratio of 50% leads to improvements in compressive strength, split tensile strength, and elastic modulus, while reducing compression toughness. Overall, this study provides a feasible approach for utilizing steel slag to produce high-quality aggregates for green concrete application.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Thermodynamics
Lili Wang, Yuzhu Zhang, Haibin Ke, Yue Long
Summary: The gas quenching dry slag granulation technique is effective in efficient waste heat recovery, with smaller particle diameter and lower fiber mass fraction contributing to higher recovery rates. High temperature experiments showed the significant impact of airflow velocity and molten slag mass flow rate on granulation characteristics.
APPLIED THERMAL ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Li Shao-ying, Li Bin, Duan Sheng-chao, Zhao Xing-ming, Guo Jing, Guo Han-jie
Summary: Laboratory experiments were conducted to study the deoxidation of H13 tool steel using CaF2-MgO-Al2O3-CaO-SiO2 slags. The [Si]-[O] reaction was identified as the control reaction, with the limitation of deoxidation being the lowest for slags with a basicity of 2.0. The mass transport of oxygen in the metal phase was found to be the rate-controlling step, and the optimized slag composition led to a significant reduction in total oxygen content in the steel.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Engineering, Chemical
Stephano P. T. Piva, Petrus Christiaan Pistorius
Summary: This study investigated deep desulfurization and deoxidation of steels using Si instead of aluminum in a specific system, leading to significant reduction in sulfur content and transformation of nonmetallic inclusions. Analyzing steel samples with various techniques revealed the successful removal of sulfur and the formation of new constituents in the steel during desulfurization process.
Article
Chemistry, Physical
Yibiao Xu, Zhao Hu, Yawei Li, Wen Yan, Yajie Dai, Liping Pan
Summary: The addition of microscale ZrSiO4 powder improved the performance of free CaO containing magnesia, resulting in increased relative density, improved hydration resistance, enhanced thermal shock resistance, and improved slag penetration resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Song Tang, Tongjiang Peng, Hongjuan Sun, Wenjin Ding, Liming Luo
Summary: Hardened pastes with different mass percentages of steel slag (SS)/titanium-extracted tailing slag (TETS) were prepared to investigate the influence of TETS on the strength of CaO SS hardened paste. The inclusion of TETS significantly increased the early strength of the hardened pastes. This increase in strength was attributed to the formation of new phases, such as hydrocalumite, which filled in the pores among particles and made the hardened pastes more compacted. In addition, the inclusion of TETS strengthened the diffraction peaks of calcite and C-S-H in the samples.
Article
Multidisciplinary Sciences
Yongqi Sun, Sicong Tian, Philippe Ciais, Zhenzhong Zeng, Jing Meng, Zuotai Zhang
Summary: This article explores the decarbonization potential of the iron and steel industry by recovering energy and recycling materials from waste streams. It suggests that a reduction of 28.5% in CO2 emissions can be achieved through this approach, and proposes using the generated revenue for carbon capture and storage implementation.
NATURE COMMUNICATIONS
(2022)
Article
Energy & Fuels
Yi-Wen Lv, Xun Zhu, Hong Wang, Mao-Lin Dai, Yu-Dong Ding, Jun-Jun Wu, Qiang Liao
Summary: This study proposed a new method combining water and air cooling to eliminate particle adhesion during heat recovery, and an experimental hybrid cooling system was built to demonstrate excellent anti-adhesion performance.
Article
Engineering, Environmental
Yang Liu, Lei Xu, Min Chen
Summary: A novel carbon-free smelting reduction process using secondary aluminum dross as the reductant, co-modified with CaO and Na2O, was proposed for recovering valuable metals from molten copper slag. The effects of Na2O addition on metal recovery and slag properties were investigated under different CaO/SiO2 ratios. The results showed that Na2O reduced the melting temperature of the slag and improved its flowability. The optimal experimental conditions achieved high metal recovery rates. Therefore, this process has great potential for practical applications.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Green & Sustainable Science & Technology
Zhe Wang, Taiyue Chen, Jiaxiang Liu
Summary: The simulation and preparation of binary f-CaO in steel slag were conducted in this study. The influence of carbonization on binary f-CaO, its carbonization performance, and hydration activity were investigated by synthesizing different proportions of binary f-CaO. It was found that the hydration activity of binary f-CaO decreased with the increase in iron content, and the carbonization degree of binary f-CaO increased and then decreased with the increase in iron content.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Yu-Qi Kong, Ting Wu, Wen-Zhi Xia, Wen Yang, Hai-Chuan Wang
Summary: The effects of BaO and MgO on the structure and properties of aluminate slag were studied using various analytical techniques. It was found that at a certain CaO/Al2O3 ratio, the addition of BaO and MgO weakened and then enhanced the structure polymerization. The viscosity change of the slag was consistent with the structure evolution, and the polymerization degree played a more prominent role in controlling the slag viscosity. The break temperature and crystallization phase of the slag were also influenced by BaO and MgO addition, showing different trends depending on the CaO/Al2O3 ratio.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Shen-yang Song, Jing Li, Wei Yan
Summary: The mechanism of carryover slag on steel during tapping was investigated, and the major reaction equations were confirmed. It was found that the increase of carryover slag amount led to a decrease in sulfur distribution but an increase in the number of inclusions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Construction & Building Technology
Qingyu Zhang, Jing Luo, Zhen Yang, Jia Wang, Yi Zhao, Yanjuan Zhang
Summary: This study investigated the use of steel slag powder (SSP) as an inorganic micro powder filler for asphalt mastic, instead of limestone powder (LSP). The results showed that adding SSP to asphalt binder enhanced the deformation resistance and fatigue life of the asphalt mastics. The complex shear modulus of the asphalt mastics increased significantly with the content of SSP. Using a combination of SSP and LSP as filler was an effective approach for utilizing steel slag in asphalt mixture.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Jing-xiong Zhong, Li-ying Cao, Mei Li, Shu-ping Wang, Fang Liu, Xue-wei Lv, Xiao-qin Peng
Summary: Alkali-activated cement (AAC) is an environmentally friendly cement option that can be made without clinker and using industrial wastes such as steel slag and blastfurnace slag. AAC made from a mixture of these wastes exhibited better resistance to sulfate attack and frost attack compared to Portland cement. Despite its high drying shrinkage, the addition of steel slag reduced this issue, and AAC also showed low risk of alkali-aggregate reaction. The major products in AAC were calcium silicate hydrate (C-S-H), calcium aluminosilicate hydrate (C-A-S-H), and zeolite-like phases.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
