The metallic minerals in an antimony polymetallic ore from Guangxi primarily consist of stibnite,pyrite,arsenopyrite,and scheelite.Gangue minerals include silicates such as quartz,muscovite,and potassium feldspar,as well as carbonates such as calcite and dolomite,indicating a complex mineral composition.The raw ore grades are 2.46％Sb,0.30％WO3,and 34.16 g/t Ag.To comprehensively recover valuable elements from this ore,a beneficiation process was developed,featuring priority decarbonization,bulk flotation of antimony-sulfur with subsequent separation,and a joint flotation-gravity separation for tungsten.The process begins with priority decarbonization to reduce the interference of carbonaceous minerals in antimony flotation.This is followed by the bulk flotation and separation of antimony and sulfur to produce silver-rich antimony concentrate and sulfur concentrate.Finally,flotation and table gravity separation are applied to recover tungsten concentrate.Closed-circuit tests yielded antimony concentrate with 44.62％Sb grade,82.98％Sb recovery,and 582.2 g/t silver;and tungsten concentrate with 63.64％WO3 grade and 68.66％WO3 recovery.Effective recovery of antimony,tungsten,and silver from the ore was achieved,providing a reference for comprehensive recovery of similar ores.
关键词
锑多金属矿/优先脱碳/锑硫混浮/浮重联合/综合回收/选矿工艺
Key words
antimony polymetallic ore/priority decarbonization/antimony-sulfur bulk flotation/flotation-gravity joint process/comprehensive recovery/beneficiation process
维普
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