Research Progress of New Technology of Hydrophobic Agglomeration Flotation of Fine Minerals
Fine mineral particles,due to their small particle size and low mass,face challenges in achieving sufficient mineralization with bubbles during flotation,resulting in significantly reduced recoveries and limiting the efficient utilization of mineral resources.To address this issue,researchers have proposed strategies to increase the apparent diameter of particles to enhance the collision probability between particles and bubbles,thereby improving mineralization efficiency.This approach has been partially implemented through traditional techniques such as carrier flotation,oil agglomeration,and flocculation flotation.However,these traditional methods encounter challenges in practical applications,including complex processes,high costs,and poor operational stability,which limit their use in large-scale industrial production.In recent years,hydrophobic aggregation technologies,enhanced by micro-nano bubbles and external fields(such as ultrasonic standing wave fields and magnetic fields),have gained widespread attention.These emerging technologies have significantly improved the efficiency of fine-grained mineral-bubble interactions by introducing innovative mineralization mechanisms.Micro-nano bubbles,with their high specific surface area and unique physicochemical properties,enhance the aggregation of fine mineral particles and their attachment to flotation bubbles,thereby significantly improving flotation recoveries.Ultrasonic standing wave field technology drives particle aggregation through acoustic radiation forces,increasing the apparent diameter of particles and further optimizing mineralization efficiency.Magnetic field technology,by introducing magnetic particles,enables fine minerals to form larger aggregates under the influence of an external magnetic field,thereby increasing the collision probability between particles and bubbles and significantly enhancing flotation efficiency.These emerging technologies not only improve flotation recoveries but also demonstrate significant advantages in operational stability and economic benefits.
fine mineralsagglomeration flotationmicro-nano bubblesultrasonic standing wavemagnetic field
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