焙烧预处理强化钼铜分离试验及机理研究  

Experimental and Mechanism Study on Strengthening Separation of Molybdenum and Copper by Roasting Pretreatment

作　　者：马敏洁 韩跃新[1] 李慧 MA Minjie;HAN Yuexin;LI Hui(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110623,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]沈阳建筑大学材料科学与工程学院,辽宁沈阳110623

出　　处：《金属矿山》2024年第9期92-97,共6页Metal Mine

基　　金：国家自然科学基金项目(编号:52274256,51904222)。

摘　　要：为解决钼铜混合精矿的铜钼浮选分离难题,以某选厂钼铜混合精矿为研究对象,探究了焙烧预处理对钼、铜浮选分离效果的影响。结果表明:焙烧预处理能有效改善钼铜混合精矿的浮选分离效果,确定的适宜焙烧预处理条件为焙烧温度250℃,焙烧时间30 min。预处理产品采用1粗2精1扫浮选流程处理,可获得钼精矿钼品位为44.30%、钼回收率为36.58%,铜精矿铜品位为14.23%、铜回收率为69.62%。焙烧产品的XRD和SEM-EDS分析结果表明,样品在焙烧过程中,主要矿物辉钼矿和黄铜矿均可发生氧化反应;当焙烧温度为250℃时,黄铜矿的表面氧化程度远高于辉钼矿,从而增大了两者可浮性差异,为有效分离铜、钼矿物分离创造了条件。In order to solve the problem of flotation separation of molybdenum-copper mixed concentrate,the influence of roasting pretreatment on flotation separation of molybdenum-copper mixed concentrate in a concentrator was studied.The results showed that the calcination pretreatment can effectively improve the flotation separation effect of molybdenum copper mixed concentrate.The optimum calcination pretreatment conditions are calcination temperature of 250℃and calcination time of 30 min.The pretreatment products were treated with one roughing,two cleaning and one scavenging flotation process,and the molybdenum grade of molydenum concentrate was 44.30%and the molybdenum recovery of molydenum concentrate was 36.58%,and the copper concentrate grade was 14.23%and the copper recovery was 69.62%.The results of XRD and SEMEDS analysis of the calcined products showed that molybdenum and chalcopyrite can be oxidized during the calcination process.When the roasting temperature is 250℃,the surface oxidation degree of chalcopyrite is much higher than that of molybdenite,which increases the difference of floatability between the two,creating conditions for the effective separation of copper and molybdenum minerals.

关 键 词：铜钼混合精矿 焙烧 预处理 浮选 

分 类 号：TD95[矿业工程—选矿] TD923