Sustainable Utilization of Steel Slag from Traditional Industry and Agriculture to Catalysis

Gao, Di; Wang, Fuping; Wang, Yitong; Zeng, Yanan

doi:10.3390/su12219295

Cited by 30 publications

(12 citation statements)

References 40 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using the Excel's Solver tool, the optimum ∆S w∞ and k values can be estimated, while the surface area production rate (SAPR) can be calculated from the derivative of Equation ( 11), according to Equation (12),…”

Section: Ballmentioning

confidence: 99%

“…In recent years, the alkali activation of various slags for the production of materials or binders that can be used in construction applications is extensively investigated [8,9]. As a result, the increase of the utilization rate of slags and the development of sustainable management schemes for environmental protection are of great importance for both the industry and the society [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Grinding Media Size on Ferronickel Slag Ball Milling Efficiency and Energy Requirements Using Kinetics and Attainable Region Approaches

Petrakis

Komnitsas

2022

Minerals

View full text Add to dashboard Cite

The aim of this study is to evaluate the effect that the size of grinding media exerts on ferronickel slag milling efficiency and energy savings. A series of tests were performed in a laboratory ball mill using (i) three loads of single size media, i.e., 40, 25.4, and 12.7 mm and (ii) a mixed load of balls with varying sizes. In order to simulate the industrial ball milling operation, the feed to the mill consisted of slag with natural size distribution less than 850 μm. Grinding kinetic modeling and the attainable region (AR) approach were used as tools to evaluate the data obtained during the ball milling of slag. Particular importance was given to the determination of the specific surface area of the grinding products, the identification of the grinding limit, and the maximum specific surface area which could be achieved when different grinding media sizes were used. The results showed that, in general, the breakage rates of particles obey non-first-order kinetics and coarse particles are ground more efficiently than fines. The AR approach proved that there is an optimal grinding time (or specific energy input) dependent on the ball size used for which the volume fraction of the desired size class is maximized. The use of either 25.4 mm balls or a mixed load of balls with varying sizes results in 31 and 24% decrease in energy requirements, compared to the use of balls with small size (12.7 mm).

show abstract

Section: Ballmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Grinding Media Size on Ferronickel Slag Ball Milling Efficiency and Energy Requirements Using Kinetics and Attainable Region Approaches

Petrakis

Komnitsas

2022

Minerals

View full text Add to dashboard Cite

show abstract

“…This study referred to the China Statistical Yearbook [41] and the Chinese Life Cycle Database (CLCD) [42] to retrieve data related to the diesel supplied during compaction. The equivalent CO 2 emission was calculated with Equation (6).…”

Section: Equivalent Co 2 Emissionmentioning

confidence: 99%

“…With the exploration of solid waste recycling, steel slag has become a potential material to be increasingly developed and used as a manufactured aggregate for civil engineering applications [6]. Generally, steel slag is a by-product of the steelmaking industry.…”

Section: Introductionmentioning

confidence: 99%

Compaction Procedures and Associated Environmental Impacts Analysis for Application of Steel Slag in Road Base Layer

et al. 2021

View full text Add to dashboard Cite

In recent years, recycling steel slag is receiving growing interest in the road base layer construction field due to its role in alleviating land occupation and resource shortages. However, the mixture compaction and its environmental impact on practical construction sites remain unclear, which may hinder the application of steel slags in road layers. This study investigates the pavement construction of the ‘Baotou-Maoming’ motorway, located in Inner Mongolia, China, analyzing the compaction procedures and assessing the environmental impacts caused by the road base layer containing steel slag. Firstly, mechanical properties and texture appearances of the steel slag aggregates are characterized. Afterwards, the comparative assessments for steel slag and andesite layers compaction are quantified from equivalent CO2 emission and energy consumption aspects, respectively. The results show that the steel slag has a better surface texture than the natural aggregates; physical properties including compactness, flatness and compressive strength comply with the requirements for applying steel slag to a hydraulically bound mixture. Compared to the base layer using andesite aggregates, the compaction vibration period of the course containing steel slags should be reduced to achieve a proper density due to the “hard-to-hard” effect that occurs between the adjacent steel slag particles. Consequently, the additional energy and the equivalent CO2 are generated at 2.67 MJ/m3 and 0.20 kg/m3, respectively.

show abstract

“…The growing industrialization in developing countries, on the other hand, generates large amounts of IBPs such as steel slag (SS) by the steel-making industry, coal ash by coal-fired power plants, and mining waste by extracting and processing mineral resources [51,52]. Along with the rapid generation of IBPs, improper treatment and uncontrolled dumping of IBPs are becoming a major environmental issue in many developing countries [53,54].…”

Section: Introductionmentioning

confidence: 99%

Steel Slag and Autoclaved Aerated Concrete Grains as Low-Cost Adsorbents to Remove Cd2+ and Pb2+ in Wastewater: Effects of Mixing Proportions of Grains and Liquid-to-Solid Ratio

Kumara

Kawamoto

2021

Sustainability

View full text Add to dashboard Cite

This study investigated the applicability of industrial by-products such as steel slag (SS) and autoclaved aerated concrete (AAC) grains (<0.105, 0.105–2, 2–4.75 mm) as low-cost adsorbents for simultaneous removal of Cd2+ and Pb2+ in wastewater. A series of batch adsorption experiments was carried out in single and binary-metal solutions of Cd2+ and Pb2+ by changing the mixing proportions of SS and AAC grains. In addition, the effect of the liquid-to-solid ratio (L/S) on the removal of Cd2+ and Pb2+ in multi-metal solution was examined. Results showed that SS grains had a high affinity with Cd2+ in the single solution, while AAC grains had an affinity with Pb2+. In the binary solution, the mixtures of SS and AAC grains removed both Cd2+ and Pb2+ well; especially, the tested adsorbents of SS+AAC [1:1] and SS+AAC [1:4] mixtures achieved approximately 100% removal of both metals. Based on the results in the multi-metal solutions, the metal removal % and selectivity sequence varied depending on the mixed proportions of SS and AAC grains and L/S values. It was found that the SS+AAC [1:1] mixture of SS and AAC grains showed 100% removals of Cd2+, Pb2+, Cu2+, Ni2+, and Zn2+ simultaneously at L/S = 10 and 60.

show abstract

Sustainable Utilization of Steel Slag from Traditional Industry and Agriculture to Catalysis

Cited by 30 publications

References 40 publications

Effect of Grinding Media Size on Ferronickel Slag Ball Milling Efficiency and Energy Requirements Using Kinetics and Attainable Region Approaches

Effect of Grinding Media Size on Ferronickel Slag Ball Milling Efficiency and Energy Requirements Using Kinetics and Attainable Region Approaches

Compaction Procedures and Associated Environmental Impacts Analysis for Application of Steel Slag in Road Base Layer

Steel Slag and Autoclaved Aerated Concrete Grains as Low-Cost Adsorbents to Remove Cd2+ and Pb2+ in Wastewater: Effects of Mixing Proportions of Grains and Liquid-to-Solid Ratio

Contact Info

Product

Resources

About