Abstract

In this study, oxidizing roasting, segregation roasting, and magnetic separation are used to extract cobalt and iron from refractory Co-bearing sulfur concentrate. The Co-bearing sulfur concentrate containing 0.68% Co, 33.26% Fe, and 36.58% S was obtained from V-Ti magnetite in the Panxi area of China by flotation. Cobalt pyrite and linneite were the Co-bearing minerals, and the gangue minerals were mica, chlorite, feldspar, and calcite in Co-bearing sulfur concentrate. The results show that cobalt is transformed from Co-pyrite and linneite to a Co2FeO4-dominated new cobalt mineral phase, and iron is transformed from pyrite to Fe2O3 and an Fe3O4-dominated new iron mineral phase after oxidizing roasting. Cobalt changed from CoFe2O4 to a new cobalt mineral phase dominated by [Co] Fe solid solution, and iron changed from Fe2O3 to a new iron mineral phase dominated by metal Fe and Fe3O4 after segregation roasting. Cobalt concentrate with a cobalt grade of 15.15%, iron content of 71.22%, and cobalt recovery of 90.81% as well as iron concentrate with iron grade of 60.06%, cobalt content of 0.11%, and iron recovery of 76.23% are obtained. The main minerals in the cobalt concentrate are Fe, [Co]Fe, Fe3O4, and SiO2, and the main minerals in the iron concentrate are Fe3O4, FeO, Ca2Si2O4, and Ca2Al2O4.

Highlights

  • The unique physical and chemical properties of cobalt make this metal an important raw material in the fields of aerospace, petrochemicals, glass manufacturing, and medicine

  • Q3 is the weight of cobalt concentrate, g; Q4 is the weight of iron concentrate, g; Q0 is the weight of segregation roasting ores, g; β1 is the cobalt grade of cobalt concentrate, %; β2 is the iron grade of cobalt concentrate, %; α1 is the cobalt grade of segregation roasting ores, %; and α2 is the iron grade of segregation roasting ores, %

  • 0.62%, which is basically consistent with the repeated test under comprehensive conditions was 0.62%, which is basically consistent with the desulfurization desulfurizationeffect effectof ofthe thesingle-condition single-conditiontest testand andalso alsoshows showsthat thatthe theobtained obtainedoxidizing oxidizingroasting roasting new iron mineral phase

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Summary

Introduction

The unique physical and chemical properties of cobalt make this metal an important raw material in the fields of aerospace, petrochemicals, glass manufacturing, and medicine. Because the floatability difference among pyrite, pyrrhotite, cobalt nickel pyrite, and thiocobaltite is small, they basically exhibit the surface properties of pyrite minerals, so it is difficult to recover separate minerals by flotation. Iron concentrate, titanium concentrate, and cobalt-bearing sulfur concentrate are obtained from V-Ti magnetite ores in the Panxi area of China by magnetic separation and flotation. A technology of two-stage roasting and magnetic separation is adopted to extract cobalt and iron from the complex Co-bearing sulfur concentrate in the Panxi area of China. This will provide an important research basis for the efficient utilization of Co-bearing sulfur concentrate resources in. Panxi [11,12,13,14]

Sampling
Chemical Reagent and Equipment
Oxidizing Roasting Test
Segregation Roasting–Magnetic Separation Test
Procedure
Analysis and Characterization
Effect of Roasting Temperature
Effect of Roasting Time
Effect of Roasting Time the roasting
Effect of Roasting Atmosphere
Analysisand and Characterizationof of OxidizingRoasting
Results in in Table
Effect of Chlorinating Agent Dosage
Cobalt
Effect
Effect of Coke that
Effect of Coke Size
11.5 Figure
Effect of16 Magnetic Separation
Ironstage
Cobalt and Iron Phase Transformation in the Segregation Roasting Process
Conclusions

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