Improving recovery of iron using column flotation of iron ore slimes

Matiolo, Elves; Couto, Hudson Jean Bianquini; Lima, Neymayer Pereira; Silva, Klaydison; Freitas, Amanda Soares de

doi:10.1016/j.mineng.2020.106608

Cited by 32 publications

(8 citation statements)

References 45 publications

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“…Results reported by Matiolo et al [27] adopted a singular sample to carry out pilot slime flotation column tests using the amidoamine Flotinor 5530 as a collector without starch, where it was possible to achieve iron grades of approximately 62% in the concentrate and 8% in the tailings; however, there are no concentration plants by flotation for itabirite iron ore consisting of one single stage. As an example, Figure 1 shows that the industrial flowsheet for the flotation of the deslimed iron ore from the Vargem Grande 2 plant consists of four stages: rougher, cleaner, recleaner and scavenger.…”

Section: Initial Pilot Flotation Tests-summary Results For a 6-day Test Periodmentioning

confidence: 99%

“…Recently, differently structured amines (modified amines or polyamines, amideamines alone or mixed with ether amines, alkyl phosphonium) has drawn great attention in the field of reverse iron ore flotation [26]. Concerning Brazilian iron ore, recent studies [27] demonstrated the possibility of adopting a specific amidoamine type collector as a new collector reagent for reverse iron ore slimes flotation. The main advantage of this reagent is its high selectivity, eliminating the use of starch or other types of depressants.…”

Section: Developments Of Collectors Regarding the Brazilian Iron Ores Slimes Characteristicsmentioning

confidence: 99%

“…The amidoamine type collector Flotinor 5530 (Clariant, Belo Horizonte, Brazil), whose main active molecule is N- propyl]dodecanamide, was not adopted yet in the industrial iron ore flotation process and previous studies demonstrated that its application for the slimes flotation similar to the slimes from Vargem Grande 2 does not require a depressant [27].…”

Section: Namementioning

confidence: 99%

“…The flotation conditions in the pilot tests presented in this work were set to mimic the parameters (pH and collector dosage) reported by Matiolo [27], where the iron ore slimes flotation was performed in a 2"and 6" column.…”

Section: Pilot Flotation General Conditionsmentioning

confidence: 99%

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Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

et al. 2021

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This work describes the concentration of iron ore slimes on a pilot scale by using a 500-mm diameter flotation column and a novel collector, which renders the use of a depressant unnecessary. The pilot column was operated in series with the industrial plant Vargem Grande 2 (Iron Quadrangle, Brazil) receiving, as feed, part of the underflow from the desliming thickener. These pilot tests represented only the rougher stage of a flotation circuit. The novel collector used was an amidoamine (average collector dosage of 160 g/t), and the tests were carried out in the absence of starch, at pH 10.5 and with bubbles/microbubbles generated by cavitation tube. It was possible to achieve a concentrate, by reverse flotation, with an average iron content of 53% and an average metallurgical recovery of 91.5% The recovery of the silica in the froth was 53.1% in average for one stage of flotation. The high variability of the slime characteristics rendered difficult the stabilization of the SiO2 recovery; however, the applicability of the amidoamine collector was proven. In an industrial scale circuit, the use of online analyzers for Fe and SiO2 content and the adoption of control logics based on the adjustment of parameters such as reagents dosage and washing water flow rate adjustment should contribute to the optimization of the results obtained in the pilot scale tests. Further studies adding a cleaner concentration stage should be performed.

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Section: Initial Pilot Flotation Tests-summary Results For a 6-day Test Periodmentioning

confidence: 99%

Section: Developments Of Collectors Regarding the Brazilian Iron Ores Slimes Characteristicsmentioning

confidence: 99%

Section: Namementioning

confidence: 99%

Section: Pilot Flotation General Conditionsmentioning

confidence: 99%

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Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

et al. 2021

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“…Currently, solvable methods for the efficient beneficiation of refractory low-grade iron ore are further discussed, such as improving mineral liberation and developing highly efficient separation processes, which have been explored to enhance refractory low-grade iron ore separation [15][16][17]. In addition, some scholars have paid great attention to optimizing traditional beneficiation techniques to improve the grade of refractory low-grade iron Minerals 2022, 12, 260 2 of 13 ore. Froth flotation is an effective method to recover fine iron minerals, and numerous investigations have been carried out on the recovery of refractory low-grade iron ore, especially for fine-grained iron minerals [18][19][20][21][22][23]. Some specific flotation schemes, such as shear flocculation flotation and carrier flotation, have been used to recover refractory lowgrade ore [24,25].…”

Section: Introductionmentioning

confidence: 99%

Clean Utilization of Limonite Ore by Suspension Magnetization Roasting Technology

Jin

Zhu

et al. 2022

Minerals

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As a typical refractory iron ore, the utilization of limonite ore with conventional mineral processing methods has great limitations. In this study, suspension magnetization roasting technology was developed and utilized to recover limonite ore. The influences of roasting temperature, roasting time, and reducing gas concentration on the magnetization roasting process were investigated. The optimal roasting conditions were determined to be a roasting temperature of 480 ℃, a roasting time of 12.5 min, and a reducing gas concentration of 20%. Under optimal conditions, an iron concentrate grade of 60.12% and iron recovery of 91.96% was obtained. The phase transformation, magnetism variation, and microstructure evolution behavior were systematically analyzed by X-ray diffraction, vibrating sample magnetometer, and scanning electron microscope. The results indicated that hematite and goethite were eventually transformed into magnetite during the magnetization roasting process. Moreover, the magnetism of roasted products significantly improved due to the formation of ferrimagnetic magnetite in magnetization roasting. This study has implications for the utilization of limonite ore using suspension magnetization roasting technology.

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Extraction and phase transformation of iron in fine-grained complex hematite ore by suspension magnetizing roasting and magnetic separation

Yuan

Wang

Zhang

et al. 2022

Korean J. Chem. Eng.

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Improving recovery of iron using column flotation of iron ore slimes

Cited by 32 publications

References 45 publications

Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

Clean Utilization of Limonite Ore by Suspension Magnetization Roasting Technology

Extraction and phase transformation of iron in fine-grained complex hematite ore by suspension magnetizing roasting and magnetic separation

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