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TECHNOLOGICAL CHARACTERIZATION OF IRON ORE TAILING FROM MINERAÇÃO CONGONHAS BENEFICIATION PLANT, BRAZIL: AN IDENTIFICATION OF OPTIMUM PROCESS ROUTE

2019; Brazilian Association of Metallurgy, Materials and Mining; Volume: 16; Issue: Especial Linguagem: Inglês

10.4322/2176-1523.20191870

2176-1523

Aline da Luz Pascoal, Ana Paula Aparecida de Almeida Paulo, Filipe Mattos Gonçalves, Júnia Soares Alexandrino, Hygor Aristides Victor Rossoni,

Metal Extraction and Bioleaching

Technological characterization was used to define an iron ore processing route for the fraction (-8.00 +3.00 mm) with 55.00% of Fe content and 17.20% of SiO2 . Even having a considerable content of iron, this fraction was stored in waste piles since there was no previously interest for this fraction processing in the iron ore treatment facility of Mineração Congonhas in Catas Altas, Brazil. The characterization comprised mineralogical, chemical, granulometric and density analyzes. For the identification of the optimum process route two concentration methods were used, both in a bench scale and using a rougher stage: Route 1 consisted of a jigging and Route 2 used magnetic separation. The optimum concentration was encountered using the magnetic separation circuit, where the mass and metallurgical recovery were, respectively, 86.60% and 95.96, with a concentrate of 60.94% Fe and 10.91% SiO2 content, which can then be further processed in a cleaner stage to meet the company's requirements.