from the conferences organized by TANGER Ltd.
In EAF steelmaking considerable amounts of dust are generated. Depending on the furnace type and the content of organic material in the scrap EAF dust contains beside iron oxides, slag components and zinc also some organic matter (TC). Recycling of this iron-rich residue is common via briquetting of the EAF dust together with other fine granular steel mill residues and a binder. It is assumed that a higher TC content in EAF is unfavourable for the strength of the briquettes. In this study, EAF dust was refluxed with an organic solvent (n-heptane) in order to reduce the TC content of the EAF dust by approximately 50%. Subsequently, both the solvent-leached EAF dust and the untreated original EAF dust were used in mixtures in the production of briquettes in a stamp press. Bentonite, modified starch and a mixture of molasses and hydrated lime were used as binders. The strength of the agglomerates was tested immediately after pressing, one hour and twenty-four hours after pressing. The results showed in most cases a higher strength of the briquettes containing leached EAF dust.
Keywords: Steel mill, EAF dust, recycling, briquette strength, organic matter© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.