碲的资源、用途与提取分离技术研究现状

稀散金属碲以其在现代高科技工业、国防与尖端技术领域中所占有的重要地位,越来越受到人们的重视,应用范围也越来越广。本文综述了碲资源的储量及其在世界范围内的分布态势和地质特征,碲在现代科技领域中的主要用途,以及有关碲提取分离技术的研究现状。     

国外碲的应用

碲及其合金具有很好的抗结晶性和在某些合金中具有优良的表面耐磨性等特点,广泛地应用于冶金、化工、玻璃、陶瓷、橡胶以及半导体材料工业等。1.碲在冶金工业方面的应用碲主要应用于冶金工业,特别是钢铁工业,美国碲的消耗量占西方世界碲总消耗量的     

从中和渣中回收金属碲

叙述了碲回收试验和工业处理情况, 所选流程包括酸浸-氯化-还原等工序。工业处理碲回收率92.6%, 产品碲粉品位达99.14%。该流程特点是:流程短, 投资省, 收率高, 成本低。      

从中和渣中回收金属碲

叙述了碲回收试验和工业处理情况,所选流程包括酸浸一氯化—还原等工序,工业处理碲回收率92.6％,产品碲粉品位达99.14％。该流程特点是,流程短,投资省,收率高,成本低。     

碲

碲在美国工业上的应用,用碲作橡胶的添加剂可以提高橡胶的耐热性和耐磨性。在制造日光灯泡时作封入气体。碲作为金属添加剂,在铅中加入1%的碲可提高铅的硬度和耐酸性。在铜中加入少量碲可提高铜的切削性而     

回收碲的工业实验

介绍了江西铜业公司贵溪冶炼厂回收碲的工业实验工艺、碲回收指标以及试验对阳极泥湿法工艺生产金银的影响。      

稀散金属硒、碲的火法回收工艺研究进展

介绍了稀散金属硒、碲在矿物火法冶炼过程的富集走向,分析了稀散金属硒、碲火法回收工艺的研究进展。针对从低品位固废中回收硒、碲的工艺现状,分析了从工业废弃物中回收稀有、稀散金属的行业发展趋势,并对未来稀散金属硒、碲回收工艺进行了展望。     

回收碲的工业实验

介绍了江西铜业公司贵溪冶炼厂回收碲的工业实验工艺、碲回收指标以及试验对阳极泥湿法工艺生产金银的影响。     

硒和碲

碲碲属于“稀散金属”,工业上作为铜精炼厂、有时也作为铅精炼厂的付产品回     

CL—TBP微柱分离二硫代比啉甲烷光度法测定碲

ＣＬＴＢＰ微柱分离二硫代比啉甲烷光度法测定碲罗明标周跃明林素卿（华东地质学院应用化学系，临川３４４０００）关键词：ＣＬＴＢＰ微色谱柱碲二硫代比啉甲烷光度法１引言金属碲及其化合物在冶金、化工、电子工业等方面有广泛的应用。随着碲需求量的逐年增长，研究...     

纳米颗粒Ag2Te掺杂p-(Ag2Te)x(Bi0.5Sb1.5Te3)1-x的快速热压制备和热电性能表征

通过溶剂热法制备出六方相Bi2 Te3纳米粉体,采用真空封管熔炼法得到Sb掺杂的Bi0.5Sb1.5Te3合金.采用溶剂热法合成粒度为40 nm的Ag2 Te纳米粉体,并通过高能球磨工艺将其掺入Bi0.5Sb1.5Te3合金,从而得到p-(Ag2 Te)x(Bi0.5 Sb1.5 Te3)1-x合金(x为Ag2 Te摩...     

Te对46MnVS非调质钢中硫化物改质的工业实践

在Φ480 mm铸坯轧至Φ38 mm材的46MnVS钢中含0.0059％ Te(Te/S=0.098)钢MnS夹杂物平均等效直径和平均面积分别较未加Te(0Te)钢增大27％和72％,长宽比为1～3的球状或椭球状夹杂物数量增加了21％,硫化物评级由细系3.0级改质为细系2.0级;Te会固溶于MnS中形成(Mn,Te)S...     

原子荧光光谱法测定金矿石中的碲及干扰抑制

准确、快速的碲元素分析方法对富碲金矿床中碲资源的综合利用和矿床成因研究均具有重要的实际意义。采用原子荧光光谱法测定金矿石中的碲,并对干扰元素进行了分析。实验结果表明,金矿石中的Au、Ag干扰碲的测定,采用硫脲作为掩蔽剂,可有效地掩蔽Au、Ag的干扰,提高测定的准确度,但不能掩蔽As、Sb和Bi,反而会加重干扰。硫脲作为掩蔽剂具有一定的局限性,As、Sb和Bi含量低的金矿石样品,可采用硫脲掩蔽剂+稀释法测定碲。     

Simultaneous Analysis of the 2nu2, nu1, and nu3 Bands of Hydrogen Telluride

Spectra of a natural sample of hydrogen telluride as well as a spectrum of monoisotopic H2 130Te have been recorded by means of Fourier transform spectrometry with a resolution of 0.003 cm-1 in the spectral domain 7.5-4.3 μm where it is easy to observe the main absorbing bands nu1 and nu3. We have located and assigned for the first time the 2nu2 band which appears in the lower wavenumber range of the recorded spectral domain near 1700 cm-1. It proved necessary to treat simultaneously the three states (020), (100), and (001). nu1 and nu3 are indeed Coriolis-coupled vibration-rotation bands and it was observed that a few rotational levels of (001) could not be fitted to within their experimental accuracy without considering the second-order Coriolis interaction between the rotational levels of (020) and (001). In this way all the experimental levels were calculated to within the experimental uncertainty, and precise sets of vibrational energies and rotational and coupling constants were obtained for the seven most abundant H2Te isotopic species, namely H2 130Te, H2 128Te, H2 126Te, H2 125Te, H2 124Te, H2 123Te, and H2 122Te. For the most abundant isotopic species H2 130Te the bands centers arenu0 (2nu2) = 1715.9568, nu0 (nu1) = 2065.2709, nu0 (nu3) = 2072.1101 cm-1. Copyright 1997Academic Press     

低碳含碲硫易切削钢的研究与实践

通过合理的化学成分、钢水全氧含量、w(Mn)/w(S)、w(Te)/w(S)及加热温度的设计与控制,成功开发出一种环保型含碲硫1214Te易切削钢,并进行了工艺实践。通过金相显微镜、扫描电镜、能谱仪对1214Te盘圆及1215MS盘圆硫化物夹杂进行观察分析发现,1214Te轧材中硫化物夹杂多数呈纺锤形或椭球形, 1215MS轧材中硫化物夹杂多数呈长条状。在相同切削条件下,1214Te轧材的断屑效果优于1215MS轧材,且切削加工后的1214Te轧材表面粗糙度降低。     

水泉沟金矿田地质地球化学特征研究

运用找矿矿物学理论，通过对水泉沟金矿田中富碲化物型金矿床(东坪)与贫碲化物型金矿床(金家庄)的对比分析，以及富碲化物型金矿床(东坪、后沟、中山沟)之间的对比研究，揭示本地区金矿床在成因、规模、贫富方面的标型特征。     

从铋碲矿中分离碲的新技术

铋碲矿用盐酸加氢酸钠浸出,浸出濉用Ｎａ２ＳＯ３学原得粗碲粉,还原后液水回收铋。粗碲粉经盐酸浆化洗涤,可得纯度达９６％的硫粉     

A thermodynamic investigation of crystalline and amorphous Se−Te alloys

The heats of formation, referred to the component elements in their stable crystalline forms, of crystalline Se?Te alloys containing 0 to 100 at. pct Te and amorphous alloys containing 0 to 30 at. pct Te were measured by liquid metal solution calorimetry. The heats of formation of the crystalline and amorphous alloys changed nonmonotonically with composition in a parallel manner. The crystalline alloys had negative heats of formation in the range of 0 to approximately 17 at. pct Te; the largest negative value of approximately?0.235 kcal/g-atom occurred at 10 at. pct Te. At 20 at. pct Te the heat of formation was positive and had a value of approximately 0.115 kcal/g-atom and at higher tellurium concentrations it again turned negative but was very small. The heats of formation of all amorphous alloys investigated were positive. A minimum of approximately 0.810 kcal/g-atom at 10 at.pct Te and a maximum of 1.040 kcal/g-atom at 20 at. pct Te corresponded to the largest negative value and the largest positive value of the heat of formation of the crystalline alloys of the respective compositions. The temperatures of maximum rates of crystallization and fusion and the heat effects associated with the crystallization and fusion of the amorphous alloys were measured by differential scanning calorimetry. With increasing tellurium concentration the temperature of crystallization decreased and the heat effect and the temperature associated with fusion increased.     

Effect of te on morphological transitions in Fe-C-Si alloys: Part ii. Auger analysis

The directionally solidified Fe-3.4 wt pct C-2 wt pct Si-0.06 wt pct Te alloys of Part I were fractured inside a scanning Auger microscope. The fracture surfaces were characterized, and fracture was found to occur predominantly along the graphite/iron interfaces of the type D gray structures. The iron/graphite interfaces were found to be covered with Te having a measured thickness of one monolayer. The effect of this selective adsorption of the Te upon the strong structure control which Te produces in cast iron is discussed in terms of current models.