|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Treatment of Molten Steel Slag for Cement Application
||Joao Batista Ferreira Neto, Catia Fredericci, Joao Oswaldo Garcia Faria, Fabiano Chotoli, Tiago Ramos Ribeiro, Antonio Malynowskyj, Andre Luiz Nunis da Silva, Valdecir Angelo Quarcioni, Andre Alexandrino Lotto
|On-Site Speaker (Planned)
||Joao Batista Ferreira Neto
Steel slag could be an alternative as cement mineral admixture, partially substituting the BF slag. A pyrometallugical process has been investigated to promote the chemical composition modification of molten steelmaking slag in slag pot. Experiments were carried out by remelting 300 kg of steel slag followed by chemical modification of liquid slag. The modified slags were naturally cooled in the slag pot or cooled by steel balls. XRD and SEM analysis of slag samples showed a relationship among chemical composition, cooling condition and amorphous and crystalline phases. Cement samples were produced by mixing 25% of treated steelmaking slag with 75% of Portland cement, resulting in more than 280 J/g of accumulated hydration heat in 72 h, expansion lower than 0,5 mm and compressive strength higher than 28 MPa and 35 MPa after 1 and 7 days, respectively. The process shows potential to be applied as a steelmaking slag treatment.
||Planned: A CD-only volume