Management of waste foundry slag in accordance with the principles of circular economy

Abstract

Waste foundry slag, which is formed in the process of melting iron and is collected from the mouths of electric arc furnaces, is stored in all foundries in Serbia in temporary landfills, usually within the factory. Given the large amounts of waste slag, there is a need for a permanent solution to this problem. As one of the solutions, the possibility of depositing foundry slag as a buffer base under the concrete cover is imposed. In order to dispose of this type of waste, appropriate geomechanical tests of the waste in question were performed. It was concluded that waste casting slag, without impurities of piece materials, ground to a granulation below 10 mm, stored so as not to contaminate with hydrocarbons can be used to make the road bed and make the lower bearing buffer layer in the granulation below 31.5 mm. In this way, the system of waste management and treatment as a material resource based on scientific knowledge and procedures and in accordance with the principles of circular economy will be improved.

Keywords

• waste foundry slag
• buffer substrate
• circular economy