Review of Optimal Processing and Recycling Methods in the Slag of the Khorasan Steel Complex s Iron Smelting Furnace

Fatemeh Soleymani¹ Elham Asrari² Seyedreza Karrari³

1) Master of Science in Civil Engineering, Environmental Engineering Major, Payam Noor University, Shiraz Branch, Iran, Email:
2) Doctorate in Environmental Engineering, Air Pollution major. Faculty of Technical and Engineering, Payame Noor University, Tehran, Iran. Email:
3) Master of Science in Civil Engineering, Transportation Engineering Major, Islamic Azad University, South Tehran Branch, Iran, Email:

IOI Code : AAAB-ABCBDE
Publication : 2nd International Congress on Engineering Sciences and Sustainable Urban Development(dtuconf.com)
Abstract :
    Slag, as a by-product of the steel industry, constitutes a massive volume of industrial waste, and its improper management can lead to significant environmental pollution. The primary objective of this research is to present an economical and efficient method for recycling slag and reusing it in construction projects. In this study, sampling was conducted from five different locations within the slag depot of the Khorasan Steel Complex. The chemical composition and physical properties of the samples were analyzed using advanced laboratory methods, including XRF analysis and physical tests. The results indicated that the main composition of the slag includes Silicon Dioxide (SiO₂), Iron Oxide (Fe₂O), and Calcium Oxide (CaO). Furthermore, the specific gravity of the slag was measured at 3280 kg/m³, and its water absorption was 1.4%. Among the key findings of this research is the feasibility of recovering up to 93% of the iron present in the slag using magnetic methods. Moreover, utilizing recycled slag as aggregate in concrete and asphalt can save up to 40% in the production costs of construction materials and prevent the depletion of natural resources. From an environmental perspective, this recycling method leads to a 75% reduction in CO₂ emissions and prevents the pollution of water, soil, and air.

Keywords : slag as a by product of the steel industry constitutes a massive volume of industrial waste and its improper management can lead to significant environmental pollution the primary objective of this research is to present an economical and efficient method for recycling slag and reusing it in construction projects in this study sampling was conducted from five different locations within the slag depot of the khorasan steel complex the chemical composition and physical properties of the samples were analyzed using advanced laboratory methods including xrf analysis and physical tests the results indicated that the main composition of the slag includes silicon dioxide (sio₂) iron oxide (fe₂o) and calcium oxide (cao) furthermore the specific gravity of the slag was measured at 3280 kg/m³ and its water absorption was 1 4% among the key findings of this research is the feasibility of recovering up to 93% of the iron present in the slag using magnetic methods moreover utilizing recycled slag as aggregate in concrete and asphalt can save up to 40% in the production costs of construction materials and prevent the depletion of natural resources from an environmental perspective this recycling method leads to a 75% reduction in co₂ emissions and prevents the pollution of water soil and air