Experimental Study on the Selection of Tin from Complex and Refractory Low-Grade Tin Fine Mud by Gravity Concentration and Flotation
The average tin grade of a certain tin fine mud in Jiangxi is 0.25％,with complex mineral composition and high content of ultrafine particles,making it a complex and refractory low-grade tin fine mud ore.Mineralogy research and beneficiation experiments were conducted on this mineral.In response to the high content of ultrafine particles in this mineral and the difficulty in separating calcium containing gangue minerals,a gravity concentration and flotation combined process of pre-enrichment by centrifuge,desulfurization,and flotation selection was determined.The experiment explored the optimal process parameters for centrifuge pre-enrichment.Firstly,the tin fine mud was pre-enriched to the grade of 0.83％through gravity concentration,then sulfide ore was removed through flotation.Finally,using benzoyl hydroxamic acid as the collector,sodium carbonate as the modifier,and sodium silicate as the vein stone inhibitor,the tin fine mud was selected through one roughing,two refining,and two scanning process.A tin concentrate with a tin content of 6.63％and a recovery rate of 52.37％was obtained,achieving an effective recovery of tin resources.
Tin fine mudCentrifugeFlotationDesulphurizationPre-enrichment
万方数据
维普
