Effect of ultrasonic pretreatment on flotation saparation of spodumene ore
This article describes a pretreatment technique using a combination of NaOH dissolution and ultrasound-coupled mechanical stirring to investigate the effect of ultrasound pretreatment on the flotation separation of lithium spodumene,quartz and feldspar minerals.By conducting single mineral flotation experiments and artificial mixed mineral flotation experiments,the excellent the ultrasound-coupled mechanical stirring pretreatment was compared with that of the traditional mechanical stirring pretreatment.To explore the mechanism of pretreatment technology,SEM,adsorption test and XPS analysis were conducted on samples treated with different pretreatment methods.The results indicate that,the floatability difference between spodumene,feldspar and quartz increases further after ultrasonic pretreatment.The recovery rate of spodumene concentrate from artificial mixed mineral flotation with a particle size of-0.074+0.038 mm can reach up to 48.23%,and the separation efficiency can reach 44.27%.Compared with traditional mechanical stirring pretreatment,the flotation effect of ultrasound-coupled mechanical stirring pretreatment is further improved.In order to explore the mechanism of the pretreatment technology,SEM,adsorption capacity test and XPS detection analysis were conducted on the ore samples.The analysis results indicate that intervention with ultrasound pretreatment can further change the surface morphology of spodumene minerals and promote a greater range of surface dissolution,thereby increasing the adsorption of reagents on mineral surfaces.Moreover,spodumene treated with ultrasound-coupled mechanical stirring pretreatment exhibits stronger NaOL adsorption capacity compared to spodumene treated with traditional mechanical stirring pretreatment.Overall,the experimental results suggest that ultrasound pretreatment has a significant promoting effect on the flotation separation of spodumene,quartz and feldspar.
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