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高碱性氧化锌矿氨性浸出研究 总被引:1,自引:0,他引:1
以NH3—NH4C1体系浸出某高碱性氧化锌矿,考察了氨浓度、液固比、时间和温度等因素对锌浸出率的影响,并分析了相应的浸出过程,得到的最佳实验条件为:NH3:NH4Cl摩尔浓度比为1∶1、氨浓度5 mol/L、液固比为3∶1、浸出时间为2 h、浸出温度40℃,此时锌浸出率为89.3%。 相似文献
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研究了氨—氯化铵体系(NH_3-H_2O-NH_4Cl)中含铜铁高的氧化锌矿的浸出行为,探讨了浸出温度、浸出液总氨浓度、浸出时间和液固比对锌浸出率的影响。结果表明,最佳浸出条件为:总氨浓度7.5mol/L、浸出温度50℃、液固比8∶1、浸出时间2h,在最佳浸出条件下锌浸出率达到94.8%。 相似文献
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以铜冶炼烟灰碱浸渣为原料,研究氨-硫酸铵体系的 pH 值、总氨浓度、氨铵摩尔比、液固质量比、反应温度、反应时间等因素对铜冶炼烟灰碱浸渣中铜锌浸出的影响规律.结果表明,最佳工艺条件为:总氨浓度为 5 mol/L、pH 值为 10、氨铵摩尔比为 2:1、液固质量比为 5:1,浸出温度为 70 ℃,浸出时间为 60 min.此条件下铜和锌浸出率分别为 90.6 %和 92.4 %. 相似文献
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采用NH3-NH4Cl-H2O体系柱浸方法浸出氧化锌矿。结果表明,在矿石粒度为0.1~10mm、双柱串联操作、第一柱中填料2 629g、第二柱填料1 314g、总氨浓度7.5mol/L、NH4Cl/NH3=2∶1、浸出液循环喷淋30d条件下,锌浸出率达到92.19%,浸出液中锌离子浓度达到54.38g/L。与瓶浸结果相比,柱浸工艺锌浸出率提高约4个百分点,浸出液中Zn2+浓度提高约11g/L。 相似文献
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采用NH3-(NH4)2SO4-H2O氨性体系从高炉瓦斯泥中浸出锌,考察了液固比、浸出时间、温度、总氨浓度、搅拌速度对锌浸出率的影响,并对浸出渣的物相进行分析。试验结果表明:液固比为6 m L/g、浸出时间为60 min、温度为20℃、总氨浓度为6.0 mol/L、搅拌速度为200 r/min的条件下,锌的浸出率达到85.6%,浸出渣的主要成分是Si O2、Fe2O3、Fe3O4、Ca O,实现了锌从高炉瓦斯泥中选择性高效溶出,与铁、硅、钙等杂质元素的分离。 相似文献
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Ce3+,Eu3+ and Tb3+ singly doped and Ce3+/Eu3+ and Ce3+/Tb3+ co-doped zinc phosphate glasses were prepared by sintering P2O5,ZnO,Ce2(C2O4)3·10H2O and Eu2O3/Tb4O7 mixtures at 1200 °C in the air for 2 h and then annealing at 450 °C for 10 h.The obtained glasses were homogeneous and transparent.The glasses without Ce3+ were colorless and those with Ce3+ showed slightly yellow.The singly doped glasses showed strong emissions and excitations from doped trivalent rare earth ions.Strong energy transfer from Ce3+ to Tb3+ was observed for Ce3+/Tb3+ coped samples.There were also some very weak evidences for the energy transfer from Ce3+ to Eu3+. 相似文献
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In order to sensitize the luminescence of Eu3+ ions in heavy metal glass,zinc lead borate glass samples containing various concentrations of Eu3+ and Tb3+ ions were prepared to study the Tb3+ to Eu3+ non-radiative energy transfer phenomena.Energy level structures of Tb3+ and Eu3+ ions were plotted to show the excitation and energy transfer routes.Efficient energy transfer from Tb3+ to Eu3+ was observed and studied qualitatively in terms of doping concentrations.The sensitization turned out to be less effective than expected.Further studies to characterize the oxidation of Tb3+ into tetravalent state and to examine the mechanism of energy transfer are proposed. 相似文献
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Dy^3+在(LaO)3BO3和(GdO)3BO3中的光致发光 总被引:1,自引:1,他引:0
研究了Dy^3+在(LaO)3BO3和(GdO)3BO3中的光致发光;探讨了基质晶体结构、稀土离子RE^3+的电荷半径比(Z/r)和Dy^3+含量对(Dy^3+)发光强度及发光颜色的影响;分析了(GdO)3BO3中Bi^3+对Dy^3+发光的敏化作用及Dy^3+4F9/2→^6H13/2超灵敏跃迁发射的自身浓度猝灭机理。 相似文献
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This work focused on the zinc powder coated with Y(OH)3 microparticles by means of ultrasonic immersion for performance improvement of zinc electrodes in alkaline battery systems.Scanning electron microscopy and other characterization techniques were applied to examine the influence of the ultrasonic power on the sonochemical growth of Y(OH)3 microparticles in direct contact with zinc powder.Electrochemical properties of zinc electrodes containing Y(OH)3 microparticles were discussed through the measurement... 相似文献
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Ca3La(BO3)3中Dy3+的光致发光 总被引:2,自引:0,他引:2
研究了Ca3La(BO3)3基质中Dy^3 的发射光谱和激发光谱。结果表明,强的激发峰值为351nm、367nm和386nm;Dy^3 的488nm和578nm发射的最佳浓度均为xDy=0.03;Dy^3 发射的黄光和蓝光强度比(用Y/B表示)随Dy^3 浓度的增加而逐渐增大;Dy^3 的^4F9/2→^6H15/2、^6H13/2跃迁发射的浓度猝灭机理均为电偶极-电偶极相互作用;同时还探讨了Ce^3 对Dy^3 发光的敏化作用。 相似文献
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以碳酸盐为沉淀剂,采用共沉淀法合成Ni1/3Co1/3Mn1/3CO3前驱体,再按照一定的锂配比将其烧结合成层状Li(Ni1/3Co1/3Mn1/3)O2。通过SEM及电性能测试仪等方法,研究了碳酸盐前驱体的合成条件,考察了碳酸盐前驱体的振实密度与合成时pH值、溶液浓度以及反应时间的关系。经过实验分析,在pH=8、溶液浓度C=2mol.L^-1、反应时间t=12-13h时,合成的碳酸盐前驱体Ni1/3Co1/3Mn1/3CO3振实密度达到最高值0.98g.cm^-3。 相似文献
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Dy3 isanimportantactivator .Ithasbeenexten sivelyappliedinmanyluminescentmaterials .Inre centyears ,someresearchershavestudiedthespec trumcharacteristicsofluminescentmaterialsdopedDy3 [1~ 6 ] andhaveobtainedsomemeaningfulre sults .InordertodevelopnewfluorescentmaterialsanddiscussthephotoluminescentruleofDy3 inthecomplexborate ,thispaperstudiesthephotolumines centcharacteristicsofDy3 inBa3La(BO3) 3host ,anddiscussestheinfluenceofthecharge to radiusratio(z/r)ofrareearthionRE3 andthecon… 相似文献