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Potential for Use of Iron Mining Tailings Calcined in a Flash Furnace as Pozzolanic Material
Department of Transport Engineering and Geotechnics, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
Department of Transport Engineering and Geotechnics, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
Vale, Belo Horizonte, Brazil
Institute for Risk and Uncertainty, University of Liverpool, Liverpool, UK
- 1 Department of Transport Engineering and Geotechnics, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
- 2 School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
- 3 Department of Transport Engineering and Geotechnics, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil
- 4 Vale, Belo Horizonte, Brazil
- 5 Institute for Risk and Uncertainty, University of Liverpool, Liverpool, UK
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Abstract
This paper presents a study of the potential use of iron mining tailings as artificial pozzolan (metakaolin) after their submission to thermal treatment via calcination in a flash furnace. The research consists of the characterization of the tailings before and after calcination, chemical, mineralogical, thermogravimetric, and mechanical strength analyses were conducted. The results were compared with those for commonly used pozzolans, metakaolin, and similarities were identified. The study of the morphology of the particles before and after calcination was conducted through analyses of images obtained by scanning electronic microscope. The pozzolanic activity of the fine mining tailings calcined with flash technology was evaluated in uniaxial compression trials, which showed excellent results.
KeywordsMine TailingsFlash CalcinationPozzolanic ActivityCompressive Strength
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