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钽铌工业的进步与展望 总被引:17,自引:5,他引:12
通过对以九0五厂(NNMS)为代表的我国钽铌工业的发展历程和世界钽铌工业发展历程的对比分析,采用了大量详实的第一手资料和基础数据。描述了我国钽铌工业发展的现状轮廓和技术发展历程及其在世界锝铌工业发展中所处的地位和竞争能力;阐明了在我国稀有金属钽铌资源冶,加技术领域中所存在的问题和面临的形势,从国家安全角度及行业整体发展的高度,提出了对国内稀有金属钽铌行业进行重组整合,并积极开发国外资源的可持续发展的战略构想。 相似文献
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《有色金属(冶炼部分)》1974,(12)
铌、钽是两种重要的稀有金属,其中铌用作高温合金,超导材料及新型单晶材料。钽是现代电子技术中制造高效电容器的重要材料,对国防及现代技术具有重要的意义。 目前从矿石分离生产铌、钽,主要用甲 相似文献
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我国是一个钨矿丰富的国家,钨矿中除含钨之外,还伴生有其他有价金属元素。如西华山所产的钨细泥矿,含有一定量的稀土、铀、铌、钽和其他元素。本文从科研、生产角度,试谈回收稀土、稀有金属的几点看法。 相似文献
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Thi Hong Nguyen 《Mineral Processing and Extractive Metallurgy Review》2019,40(4):265-277
Niobium and tantalum are found together in natural minerals. Leaching with concentrated acid solution or alkaline roasting followed by water/dilute acid leaching results in a solution containing these two metals. In this work, we reviewed the extraction and separation of Nb(V) and Ta(V) from leach liquors in the absence and presence of hydrofluoric acid by acidic, neutral extractants and amines. Several solvent extraction systems were compared in the light of the requirement of hazardous chemicals, extraction/separation efficiency, and stability/solubility of extractants. Since the cationic species of Nb(V) and Ta(V) are unstable in the aqueous solution, the application of acidic extractants for extraction and separation of these metals is limited. Amines can extract Nb(V) as well as Ta(V) irrespective of the presence of fluoride ion but the separation of these metals from the loaded amines should be carried out in stripping process, resulting in process complexity. Another disadvantage encountered for amine is related to high viscosity in extraction process. Neutral extractants are considered as promising extractants which are effective to separate Ta(V) and Nb(V) from either non-fluoride or to moderate fluoride ion concentration in terms of extraction, separation and stripping efficiency. Compared to the traditional methyl iso-butyl ketone (MIBK) based system, methyl isoamyl ketone (MIAK) is found to be a promising extractant to separate Nb(V) and Ta(V). 相似文献
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叙述了钽铌精矿经酸分解,矿浆萃取,过滤后的残渣采用搅洗,漂洗,摇选的方法成功地回收富集钽铌渣中的Ta2O5,Nb2O5。该回收工艺投资少,操作简便,经济效益可观。 相似文献
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头道桥铌钽矿床位于大兴安岭主脊断裂带西北部,该断裂带是寻找多种有色金属、稀土及稀有金属矿产的重要地段。通过分析成矿地质背景,结合地球物理及地球化学测量结果,对找矿标志进行了总结。满克头鄂博组、深部花岗斑岩、含有烧绿石的岩石均可作为直接找矿标志;高阻低极化异常为矿区找矿的地球物理标志;矿区成矿作用以Nb、Ta为主,Li、Be、Th可作为找矿的指示元素;对圈定的土壤综合异常进行查证,探获了矿体,表明由Nb、Ta等主成矿元素组成的异常可作为找矿的地球化学标志。综合利用地质、地球物理、地球化学方法进行找矿是十分有效的手段,可为周边地区找矿提供借鉴。 相似文献
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The effects of combined oxygen and hydrogen on the temperature dependence of the yield stress and ductility of V, Nb, and
Ta have been investigated over the temperature range 295 to 78 K. In V the combined effects of oxygen and hydrogen on the
yield stress were greater than those expected from a sum of the individual contributions, whereas, in Nb and Ta the sum of
the individual contributions was similar to the combined contribution. The combined effect of oxygen and hydrogen on ductility
of V, Nb, and Ta was similar to that of hydrogen alone and resulted in a ductile-brittle transition behavior. Oxygen by itself
had no significant influence on the ductility of these metals. In general, the presence of oxygen in hydrogenated V, Nb, and
Ta decreased the hydride solvus temperature(T
s), but it did not affect the ductile-brittle transition temperature (DBTT). There was no apparent correlation between DBTT
andT
s in these alloys. Models based on equilibrium hydride precipitates for strengthening or stress induced hydrides at a propagating
crack for embrittlement appear inadequate for explaining the observed mechanical behavior in these Group VA metals.
T. E. SCOTT, formerly with Ames Laboratory, is with Michigan Technological University, Houghton, MI 49931. 相似文献
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金属矿中稀土和稀散元素的测定对其综合利用具有重要意义。难溶元素Nb、Ta、Zr、Hf采用酸溶法处理时较难溶解完全,Nb、Ta采用碱熔法处理后再用王水浸取存在不稳定的问题。实验采用偏硼酸锂熔融样品,酒石酸体系浸取,解决了上述Nb、Ta等元素测定中遇到的难题。通过选择待测同位素和干扰校正方法在线校正,以10 μg/L185Re和10 μg/L103Rh为混合内标,采用电感耦合等离子体质谱法(ICP-MS)对浸取液进行测定,实现了对金属矿中La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Y共15种稀土元素,及Nb、Ta、Zr、Hf、Ga、Rb、Cd、Cs、In、Tl共10种稀散元素的测定。方法校准曲线的线性相关系数均大于0.999 7,方法检出限为0.03~0.85 μg/g,定量限为0.09~2.55 μg/g。将实验方法应用于铅矿石、钨矿石、钽矿石和锆矿石标准物质中稀土和稀散元素的测定,结果的相对误差(RE)为-5.33%~6.67%,相对标准偏差(RSD,n=12)不大于9.8%。采用实验方法对洛宁铅锌多金属矿区的样品进行测定,结果的相对标准偏差(n=5)不大于9.3%。 相似文献
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阐述了钽铌新材料与高新技术发展的关系。对钽铌材料在相关高技术产业领域的应用作了简要介绍。分析了钽铌新材料发展趋势。针对本省钽铌资源在国内所处的优势地位,以及本省钽铌工业的现状及差距,提出了加速本省钽铌工业发展的思路、钽铌新材料产业发展方向、新材料技术发展的具体内容以及加快相关产业发展的政策建议。 相似文献
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运用嵌入原子方法(EAM)研究了过渡金属W、Nb、Ta与碱金属Na组成的3个二元合金的形成焓。计算结果与HumeRethory理论符合得较好,EAM模型用于过渡金属(W,Nb,Ta)与碱金属(Na)组成的合金系统的形成焓计算是合适的。 相似文献