摘要
石墨作为战略性资源,其高效分选对工业应用至关重要。针对某地区难选石墨矿中石墨呈“球团”状聚集且脉石嵌布复杂等特点,通过系统的浮选工艺优化以提高其精矿固定碳含量和回收率。试验采用粗磨粗选-粗精矿多段再磨多次精选的工艺流程,重点考察了磨矿方式、再磨时间及中矿处理等关键参数对固定碳含量以及回收率的影响规律。结果表明:粗选最佳条件为磨矿细度-150μm占比47.12%,捕收剂柴油用量125 g·t^(-1),起泡剂松醇油用量100 g·t^(-1);粗精矿经前三段球磨、后两段砂磨再磨及七次精选后,最终精矿固定碳含量达94.14%,回收率为94.15%,产率6.69%。该工艺流程在具有稳定的工艺指标的同时,也为同类难选石墨矿的高效开发提供了技术支撑。
Graphite,as a strategic resource,requires highly efficient separation to meet industrial application demands.Focusing on the characteristics of a refractory graphite ore from a specific region,where graphite occurs in"nodular"aggregates with complex gangue mineral dissemination,this study conducted systematic flotation process optimization to enhance the fixed carbon content and recovery rate of the concentrate.The experimental process consisted of rough grinding and roughing,followed by multiple stages of regrinding and cleaning of the rough concentrate.Key parameters,including grinding method,regrinding duration,and middlings treatment,were investigated for their effects on fixed carbon content and recovery.The results indicate that the optimal rougher conditions are a grinding fineness of 47.12%passing-150μm,a diesel collector dosage of 125 g·t^(-1),and a pine oil frother dosage of 100 g·t^(-1).After three stages of ball mill regrinding,two stages of sand mill regrinding,and seven cleaning stages of the rough concentrate,the final concentrate achieved a fixed carbon content of 94.14%,a recovery rate of 94.15%,and a yield of 6.69%.This process flow not only delivers stable technical indicators but also provides crucial technical support for the efficient exploitation of similar refractory graphite ores.
作者
黄建树
陈慧杰
潘卫
韦凯
刘定桦
于阳辉
HUANG Jianshu;CHEN Huijie;PAN Wei;WEI Kai;LIU Dinghua;YU Yanghui(Suzhou SINOMA Design&Research Institute of Non-metallic Minerals Industry Co.Ltd.,Suzhou 215000,Jiangsu,China;National Engineering Research Center for Further Processing of Non-metallic Minerals,Suzhou 215000,Jiangsu,China)
出处
《矿冶》
2025年第5期746-754,共9页
Mining And Metallurgy
关键词
难选石墨矿
球团状结构
浮选
再磨工艺
鳞片保护
refractory graphite ore
nodular structure
flotation
regrinding process
flake protection
