Improving recovery of iron using column flotation of iron ore slimes

•Iron ore slimes recovery is the most important issue in iron ore industry in Brazil.•Two slimes sample from Quadriláterro Ferrífero (Brazil) were studied in this work.•Collector type amide-amine and column flotation were applied to reverse flotation.•Flotation results indicates distinct behavior de...

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Bibliographic Details
Published in:Minerals engineering 2020-11, Vol.158, p.106608, Article 106608
Main Authors: Matiolo, Elves, Couto, Hudson Jean Bianquini, Lima, Neymayer, Silva, Klaydison, de Freitas, Amanda Soares
Format: Article
Language:English
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Summary:•Iron ore slimes recovery is the most important issue in iron ore industry in Brazil.•Two slimes sample from Quadriláterro Ferrífero (Brazil) were studied in this work.•Collector type amide-amine and column flotation were applied to reverse flotation.•Flotation results indicates distinct behavior depends on the slime sample.•Very good flotation results were obtained with one of the slime sample. In general, the industrial flowsheets for the beneficiation of itabirite iron ores from the Quadrilátero Ferrífero (Minas Gerais state) in Brazil involves grinding, desliming, magnetic separation and cationic reverse flotation using both mechanical and columns flotation cells. At Brazilian plants, it is estimated that Fe losses generated at the slimes stage range between 8% reaching values higher than 20%. Slimes generated at hydrocyclone containing particle sizes of approximately 99%  10 μm, 45% 
ISSN:0892-6875
1872-9444
DOI:10.1016/j.mineng.2020.106608