溶剂萃取法制取铼酸铵

本文论述了江西铜业集团公司贵溪冶炼厂采用溶剂萃取法从还原终液中综合回收铼并制取铼酸铵的生产工艺 ,该工艺生产成本低 ,经济效益显著 ,铼的萃取率、反萃率均高于 98% ,铼直收率大于 85 % ,产品铼酸铵品位大于 99%。     

金堆城精矿提取铼金属方法探讨

通过对金堆城钼精矿氧化焙烧过程分析，提出了采用反射炉对电除尘含铼烟尘进行焙烧，使烟尘中的低价铼的化合物氧化并挥发进入烟气，然后采用烟气淋洗一离子交换工艺提取金属铼的提取工艺。烟尘经反射炉焙烧过程可直接焙烧成用于钼酸铵生产的可溶焙烧钼精矿产品出售，有较好的经济效益。淋洗后沉降出烟尘可进入反射炉继续焙烧处理。     

三道庄多金属共生矿综合利用浅析

三道庄钼钨矿床属多金属共生矿，介绍了三道庄钼钨矿床的地质构造特征，分析了资源开采的现状和存在的问题，并对资源综合利用的前景进行了展望。     

Oxidation resistance and high-temperature strength of WC-Co-Ni-Re(Mn) hard alloys

The basic regularities of hard alloy oxidation in the WC-Co-Ni-Re(Mn) system have been established. The temperature dependence of bending strength in the operation temperature range of turning tools has been investigated. Cutting blades from the investigated alloys with a modified metal binder have high operational properties, which is confirmed by tests. __________ Translated from Poroshkovaya Metallurgyia, Nos. 7–8(450), pp. 55–59, July–August 2006.     

F-2型树脂吸附铼的研究

研究了F-2型阴离子交换树脂在弱酸体系中吸附、解吸铼的性能和机理.结果表明,H+浓度在0～0.4mol/L时对铼的吸附有利.树脂对铼的静态和动态的饱和吸附容量分别为每克干树脂169.31mg和175.43mg.淋洗剂选用2mol/L硫氰酸铵,流速2ml/min,回收率大于92%.     

R—518树脂富集铼的性能研究

本文较系统地研究了新功能树脂Ｒ－５１８吸附、解吸铼的条件及理想状况下Ｒ－５１８树脂的抗干扰能力。实验结果表明该树脂有成为富集鳞的优良吸附材料。     

铂铼重整催化剂的最佳氯含量

以正庚烷为原料,采用加压微反－色谱装置考察了铂铼重整催化剂活性,选择性和稳定性与催化剂氯含量的关系。据此得出了ＣＢ－６、ＣＢ－７催化剂的最佳氯含量分别为１．０５％和１．１１％,并在中型装置上验证了所得结论。同时分析了氯的作用机理,并对重整过程中控制最佳氯含量所得的经济效益进行了估计。     

Re及时效时间对耐腐蚀镍基定向合金组织和持久寿命的影响

优化设计了三种含Re分别为0％,2％,3％(质量分数)的耐腐蚀定向镍基高温合金,分析了三种合金在900℃高温时效过程中组织的变化,测试了三种合金在不同时效时间980℃/200MPa下的持久寿命.结果表明:随着Re含量和时效时间的增加,合金析出σ相的倾向增大,合金高温持久性能下降;Re明显细化持久性能试样的筏排结构,随着Re含量的增加,合金性能下降的幅度变小.     

Chemical Vapor Deposition of High‐Quality and Atomically Layered ReS2

Recently, anisotropic 2D materials, such as black phosphorus and rhenium disulfides (ReS₂), have attracted a lot attention because of their unique applications on electronics and optoelectronics. In this work, the direct growth of high‐quality ReS₂ atomic layers and nanoribbons has been demonstrated by using chemical vapor deposition (CVD) method. A possible growth mechanism is proposed according to the controlled experiments. The CVD ReS₂‐based filed‐effect transistors (FETs) show n‐type semiconducting behavior with a current on/off ratio of ≈10⁶ and a charge carrier mobility of ≈9.3 cm² Vs⁻¹. These results suggested that the quality of CVD grown ReS₂ is comparable to mechanically exfoliated ReS₂, which is also further supported by atomic force microscopy imaging, high‐resolution transmission electron microscopy imaging and thickness‐dependent Raman spectra. The study here indicates that CVD grown ReS₂ may pave the way for the large‐scale fabrication of ReS₂‐based high‐performance optoelectronic devices, such as anisotropic FETs and polarization detection.     

W、Mo、Re基体熔盐电沉积Ir涂层初探

采用熔盐电沉积法在W、Mo、Re基体表面分别制备了Ir涂层,通过扫描电镜和能谱分析了涂层的形貌和成分,对比研究了W、Mo、Re在熔盐电沉积Ir涂层过程中的性质。结果表明：W和Mo在氯化物熔盐体系中腐蚀严重,电沉积后在基体和涂层之间形成了含有腐蚀产物的夹盐层,大大降低了涂层和基体之间的结合力,在热应力和外力的作用下涂层易...