Process mineralogy and beneficiation recovery of a refractory antimony oxide ore
A process mineralogy study was conducted on a certain antimony oxide ore using X-ray fluorescence spectroscopy analysis,chemical multi-element analysis,X-ray diffraction analysis,and electron probe analysis.The results showed that the antimony content in the raw ore was only 1.21％.The antimony containing minerals were antimony hua and antimonite,and the gangue minerals were aluminium silicate minerals such as quartz,fluorite,and mica.The raw ore was brittle and prone to mud formation,making it a low-grade refractory antimony oxide ore.Recovery exploration experiments were conducted on this ore based on the research results of the mineralogy process.The ore was separated using a classification-gravity separation method.Initially,the ore was first classified into+74 μm and-74 μm products.The+74 μm fraction was processed using a procedure involving grinding,spiral chute roughing,and shaking table refining.For the-74 μm fraction,accounting for 28.03％of the raw ore,the spiral chute rough concentrate had an Sb grade of 2.01％and an Sb operation recovery rate of 28.49％.Based on this,a shaking table was used to select the spiral chute rough concentrate and obtain a shaking table concentrate with an Sb grade of 6.03％and an Sb operation recovery rate of 56.90％.-74 μm grade products were sorted using a suspended vibration cone concentrator to obtain antimony concentrate with an Sb grade of 4.87％and an Sb recovery rate of 26.12％.Under appropriate grinding fineness,the antimony containing minerals in the oxidized antimony ore can be effectively recovered through multi-stage re-selection and a combination of multiple re-selection equipment.The research results can provide a reference for the comprehensive recovery of the refractory antimony oxide ore.
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