某低品位铜镍电镀污泥矿化—浮选工艺研究

对含Cu 0.96%、Ni 1.36%的某低品位铜镍电镀污泥开展了矿化—浮选工艺研究,通过矿物自动检测仪(MLA)、扫描电镜能谱仪(EDS)、X荧光分析仪(XRF)等分析手段,研究了污泥矿化前后的性质变化。对电镀污泥矿化后的烟化炉渣进行浮选试验研究,闭路试验获得了Cu品位5.47%、Ni品位8.03%的铜镍混合精矿,Cu、Ni作业回收率分别为91.37%和95.10%,浮选尾矿中Cu、Ni含量小于0.15%,不属于具有浸出毒性特征的危险废物。该工艺有效的实现了低品位铜镍电镀污泥的资源化回收和无害化处置。     

难处理钒矿高效利用技术研究

采用复盐焙烧—弱碱浸出工艺从一种选矿富集得到的含钒混合精矿中提钒,精矿V_2O_5品位为1.738%,其中约70%的钒以低价钒(V~(3+))形式存在,且结构致密,属于难处理矿物。研究了添加剂、精矿粒度、焙烧温度、焙烧时间、浸出温度及浸出碱液浓度等因素对钒浸出率的影响。在添加剂为16.0%NaCl+7.5%Na_2CO_3+1.5%卤化物A复合盐、精矿粒度-0.075mm占86.2%、球团粒度～10mm、入炉温度200℃、焙烧温度830℃、焙烧时间2.5h、浸出L/S=2、浸出碱液浓度0.2mol/L、浸出温度60℃、搅拌时间2.0h的条件下,钒浸出率为78.52%。     

Adsorption of rare earth elements on organic matter in coal

The occurrence modes of rare earth elements(lanthanide and yttrium,abbreviated as REY) in coal are impo rtant both for coal geochemistry studies and the application potential of REY as a by-product of coalbased resources.In this study,the adsorption behaviors of REY on organic matter in coal were investigated by leaching tests using REY solution and ultra-low ash coal samples.On this basis,the adsorption mechanism of REY on organic matter in coal was also studied by molecular simulation calculat...     

Tuning structure and magnetic properties of table-like magnetocaloric effect in Er6MnSb2 by zirconium substitution

In this study,zirconium(Zr) successfully substituted for erbium(Er) in Er_6-xZr_xMnSb₂(x=0,0.5,1,1.5) of the Fe₂P type,with comprehensive characterizations on crystal structure,electronic structure and magnetic properties.According to synchrotron powder X-ray diffraction data analysis and density functional theory calculation,Zr does not randomly but preferentially occupy during the doping process and results in weaker magnetic exchange interactions and ...     

氧化铜矿捕收剂混合使用的协同效应综述

通过氧化铜矿捕收剂混合使用的应用实例,对捕收剂的混合使用进行了分类,同时对捕收剂混合使用的协同效应机理进行了归纳总结,主要有穿插型和层叠型共吸附、螯合机理和功能对应机理.