Recovery of Waste with a High Iron Content in the Context of the Circular Economy

Ardelean, Erika; Socalici, Ana; Lupu, O.; Bistrian, Diana Alina; Dobrescu, Cristian; Constantin, Nicolae

doi:10.3390/ma15144995

Cited by 6 publications

(6 citation statements)

References 14 publications

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“…), which will form part of the raw material and material base of steel companies, thus strengthening the sustainable development of the steel industry. Applying the above approach contributes to minimizing landfill waste, reducing gas emissions, and conserving primary raw material resources [16].…”

Section: Waste Typementioning

confidence: 99%

“…In the practices of the steel industry worldwide, the most common iron-containing wastes are the following: sinter dust and sludge; blast furnace dust and sludge; converter dust and sludge; steel mill dust (from Siemens Martin steel mill); electrofilter dust from the electric steel mill; scale and mill scale sludge; ferrous fraction of steel mill slag [4,[8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Development of a Waste Management Strategy in a Steel Company

Fărcean,

Proștean,

Ardelean

et al. 2024

Sustainability

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The management of waste, especially ferrous waste, poses great problems in the steel industry due to strict regulations on preventing, reducing, or even eliminating the factors that generate a high degree of environmental pollution (landfills resulting from the steel industry and adjacent industries—mining, energy, etc.). The present paper presents a synthesis of the specialized literature regarding the processes used, both worldwide and nationally, regarding the transformation of raw materials (ores or concentrates) and iron-containing waste (steel mill dust, mill scale and scale, sludge from agglomeration factories, sideritic waste, etc.) into by-products that can be used in the steel industry. For technological reasons, the option of pelletizing powdered waste was applied—in laboratory conditions, according to its own recipes, with results that justify the application of the technology on an industrial scale (appearance after hardening; drop resistance). The aim of the paper was to identify a practical solution; based on this solution, original conceptual models of organizational strategies (management and processing, respectively, recovery of ferrous waste within steel companies) were developed, such as a concentration strategy, diversification, vertical integration, etc. Within graphical representations of the proposed strategies, other processing variants were mentioned: agglomeration; briquetting.

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Section: Waste Typementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a Waste Management Strategy in a Steel Company

Fărcean,

Proștean,

Ardelean

et al. 2024

Sustainability

Self Cite

View full text Add to dashboard Cite

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“…In fact, the UN urges for further research on innovations in tailings' reuse, namely with respect to the potential to reuse at least part of the mining waste as an alternative to natural aggregates in construction [9]. Some attempts have been made to reuse tailings in construction, namely those resulting from iron ore mining, with the experimental results suggesting promising applications for the waste analyzed, which was processed by briquetting [10]. Using iron ore tailings in geotechnical works can be even more attractive, due to the large volume of materials that are often required to build embankments, land reclamation works, etc.…”

Section: R Peer Review 3 Of 21mentioning

confidence: 99%

The Experimental Characterization of Iron Ore Tailings from a Geotechnical Perspective

Coelho,

Camacho

2024

Applied Sciences

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The mining industry produces large amounts of tailings which are disposed of in deposits, which neglects their potential value and represents important economic, social and environmental risks. Consequently, implementing circular economy principles using these unconventional geomaterials may decrease the wide-ranging impacts of raw material extraction. This paper presents an experimental characterization of iron ore tailings, which are the most abundant type of mining waste. The characterization includes various aspects of behavior that are relevant to different types of use as a building material, including physical and identification properties, compaction behavior and stress–strain properties under undrained monotonic and cyclic triaxial loading. The tailings tested can be described as low-plasticity silty sand materials with an average solids density of 4.7, a maximum dry unit weight close to 3 g/cm3 and a higher angle of friction and liquefaction resistance than common granular materials. The experimental results highlight the particular features of the behavior of iron ore tailings and emphasize the potentially promising combination of high shear resistance and high density that favors particular geotechnical applications. Overall, the conclusions provide the basis for promoting the use of mining wastes in the construction of sustainable geotechnical works and underpin the advanced analysis of tailings storage facilities’ safety founded on an open-minded geotechnical approach.

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“…Various types of waste can be used as raw materials to produce briquettes while solving the waste management problem (Ardelean et al, 2022;Bazhin, Kuskov, & Kuskova, 2019;Ganesan & Vedagiri, 2022;Vaish, Sharma, & Kaur, 2022). Coconut shell (Cocos nucifera) is a waste product that can be utilized to produce charcoal briquettes.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Cassava Peel (Manihot utilissima) Waste as an Adhesive in the Manufacture of Coconut Shell (Cocos nucifera) Charcoal Briquettes

Rudiyanto

Agustina

Ulma

et al. 2023

Int. J. Renew. Energy Dev.

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Coconut shells and waste cassava peels could be used as the main raw material for biomass briquettes for alternative energy sources in Indonesia. This study aims to analyze the quality of briquettes based on a coconut shell and cassava peel adhesive through proximate analysis with three treatment ratio variations. The ratio of coconut shell to cassava peel used varied from V1 (75%:25%), V2 (70%:30%), and V3 (65%:35%). Based on the result, the charcoal briquettes produced have a density of 0.61 gram/cm³-0.66 gram/cm³, water content of 5.51%-7.85%, ash content of 1.50%-2.86%, combustion rate of 0.021 gram/s-0.026 gram/s, and the calorific value of 6,161 cal/gram-6,266 cal/gram. However, all the treatment variations appropriate the SNI 01-6235-2000, the national standard of Indonesia for the quality of charcoal briquette, which includes the calorific value (>5,000 cal/gram), moisture content (<8%), and ash content (<8%). Briquettes with the best quality were generated by V1 with a density of 0.66 gram/cm³, water content of 5.51%, ash content of 1.50%, combustion rate of 0.026 gram/s, and calorific value of 6,266 cal/gram. Furthermore, briquette material from the coconut shell waste with natural cassava peel adhesive can be feasible as an alternative fuel.

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Recovery of Waste with a High Iron Content in the Context of the Circular Economy

Cited by 6 publications

References 14 publications

Development of a Waste Management Strategy in a Steel Company

Development of a Waste Management Strategy in a Steel Company

The Experimental Characterization of Iron Ore Tailings from a Geotechnical Perspective

Utilization of Cassava Peel (Manihot utilissima) Waste as an Adhesive in the Manufacture of Coconut Shell (Cocos nucifera) Charcoal Briquettes

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