Search

The steel industry is a sector where the concept of sustainable development is operationalized, and the circular economy must be implemented by recycling secondary products and transforming them into by–products used as components of natural capital. Small and powdery waste containing iron from the steel industry has a high content of useful elements that can be recovered by using them in the processing of aggregates as raw materials or auxiliary materials. To choose the optimal waste recovery technology, it is necessary to characterise it qualitatively. The purpose of the work is to present the provenance and qualitative characteristics of small and powdery industrial waste with iron content, highlighting the importance of the recovery process and the introduction of waste into the national economic circuit according to the principles of circular and green economy. [ABSTRACT FROM AUTHOR]

In the steel industry, a significant amount of waste is frequently generated, the vast majority having a high content of iron and other useful elements; for this reason, it is necessary and recommended that small and powdery industrial waste containing iron be recovered and not stored, within the same manufacturing flows where it was generated following the principles of the circular economy or, where it is not possible (due to limiting factors related to chemical composition, granulation, technological limitations, etc.), recycling is carried out in other industries (e.g. nonferrous, building materials, etc.). Their capitalization and return in the form of by-products in the steel industry or other industrial sectors produces economic and ecological effects. The work presents the possibilities of managing and characterizing some industrial waste with iron content, historically stored, and results on manufacturing flows. [ABSTRACT FROM AUTHOR]

In order to apply the concepts that allow the transition from a linear to a circular economy, waste generators and/or processors must identify those variants that generate products that can be used as secondary raw materials, thus also respecting the actions governing sustainable development. This paper presents such a variant, the briquetting of waste with high iron content, waste generated on current flows in steel enterprises or deposited in industrial sites. The obtained briquettes are analyzed for chemical and mechanical characteristics so that can be used as secondary materials in the steel production. An optimization of the chemical composition using generic algorithms is also proposed in order to obtain the mechanical characteristics necessary for the proper handling of these products. [ABSTRACT FROM AUTHOR]