氢基矿相转化对铌铁矿浮选行为的影响  

Influence of Hydrogen Mineral Phase Transformation on Flotation Behavior of Niobite

作　　者：赵平 高鹏[1] 刘杰[1] 张小龙[1] 孙永升[1] ZHAO Ping;GAO Peng;LIU Jie;ZHANG Xiaolong;SUN Yongsheng(School of Resources and Civil Engineering,Norheastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819

出　　处：《有色金属（选矿部分）》2024年第5期110-117,共8页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助项目(52130406);国家重点研发计划项目(2021YFC2901000)。

摘　　要：采用氢基矿相转化技术可实现白云鄂博中贫氧化矿中铁矿物的高效回收,但对于铌矿物如铌铁矿在氢基矿相转化过程中可浮性的变化还尚未被探清。通过单矿物浮选试验研究氢基矿相转化对铌铁矿可浮性的影响规律,并结合X射线衍射(XRD)、比表面积法(BET)、红外光谱(FTIR)、接触角测试手段分析氢基矿相转化前后铌铁矿与药剂的作用机理。单矿物浮选试验结果表明,氢基矿相转化前铌铁矿在矿浆pH=7、Pb(NO3)2浓度100mg/L、BHA浓度150mg/L、MIBC浓度60mg/L的最佳条件下,浮选回收率可达92.00%。氢基矿相转化后铌铁矿在矿浆pH=8、Pb(NO3)2浓度100mg/L、BHA浓度360mg/L、MIBC浓度60mg/L的达到最佳条件下,浮选回收率可达89.23%,表明氢基矿相转化降低了铌铁矿的可浮性。XRD、BET、FTIR、接触角等分析结果表明,氢基矿相转化前后铌铁矿物相虽然无明显变化,但在氢基矿相转化过程中,铌铁矿孔体积在不同孔径尺度上均有增加,比表面积增大,从而导致氢基矿相转化后铌铁矿在浮选过程中会消耗大量药剂,其亲水性在相同药剂用量的条件下更强。铌铁矿氢基矿相转化前后均与苯甲羟肟酸发生化学吸附。The efficient recovery of iron minerals from poor oxidized ores in Bayan Obo can be achieved by using the Hydrogen Mineral Phase Transformation(HMPT),but the changes in the floatability of niobium minerals,such as niobite,during the HMPT process have not yet been investigated.The single-mineral flotation test was conducted to investigate the influence of HMPT on the floatability of niobite,and the interaction mechanism between niobite and chemicals before and after HMPT was analyzed by X-ray diffraction(XRD),specific surface area method(BET),infrared spectroscopy(FTIR),and contact angle test methods.The results of the single-mineral flotation tests showed that the flotation recovery of niobite before HMPT could reach 92.00%under the optimal conditions of pulp pH=7,Pb(NO3)2concentration 100mg/L,BHA concentration 150mg/L,and MIBC concentration 60mg/L,while the flotation recovery of niobite after HMPT could reach 89.23%under the optimal conditions of pH=8,Pb(NO3)2concentration 100 mg/L,BHA concentration 360 mg/L,and MIBC concentration 60mg/L,which reduced the floatability of niobite.The results of XRD,BET,FTIR and contact angle analysis showed that although there was no obvious change in the mineral phase of niobite before and after the HMPT,the pore volume of niobite increased in different pore size scales during the HMPT.As a result,niobite will consume a larger amount of chemicals in the flotation process after the HMPT,and its hydrophilicity will be stronger under the condition of the same amount of chemicals.Niobite chemisorbed with benzohydroxamic acid both before and after the HMPT.

关 键 词：铌铁矿 浮选 氢基矿相转化 

分 类 号：TD923[矿业工程—选矿] TD954