共查询到19条相似文献,搜索用时 93 毫秒
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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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钽铌湿法冶炼生产钽铌氧化物过程中,钽铌氢氧化物调洗工序会产生大量高氨氮碱性废水,目前多数冶炼厂采用汽提脱氨塔处理碱性废水,处理后的合格废水温度一般大于70℃;钽铌氢氧化物煅烧工序会产生大量高温废烟气。本文介绍的储能式余热回收技术利用板式换热器回收废水中余热,利用烟气换热器回收废烟气中余热。在钽铌湿法冶炼中将两种换热方式进行组合,能实现回收余热并产生高于70℃的热纯水,有效节约能源。 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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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