从尾矿中回收铋的试验研究与生产实践

介绍了用浮选法强化回收尾矿中铋的试验研究 ,提出在生产过程中掌握的几个技术问题。分析了大量的试验和生产数据 ,证明该项目的研究与应用是成功的 ,仅此可提高全厂铋综合回收率 12 %以上 ,从而使该矿铋选矿总回收率达到 5 6 %～ 5 8%,每年为企业创利 2 0万元以上 ,效果显著。     

1-[(2,3,4-三羟基苯)偶氮]-4-苯甲酸分光光度法测定铋的研究与应用

研究了1-[(2,3,4-三羟基苯)偶氮]-4-苯甲酸(TKAB)与铋的显色反应,试验了5种不同表面活性剂及1种混合表面活性剂的增敏作用,选定Bi(Ⅲ)-TKAB-CTMAB显色体系.该体系在pH1.45～2 80形成稳定的红棕色络合物,在445nm处有最大吸收,表观摩尔吸光系数ε=5.45 ×104.铋的质量浓度在0～20μg/10mL范围内符合比尔定律.用于铜合金中痕量铋的直接测定,结果满意.     

Novel Bi-substituted Yttrium Iron Garnet Film／Crystal Composite for Magneto-optical Applications

The novel Bi-substituted rare-earth iron garnet films were grown by the modified liquid phase epitaxy (LPE) technique for use as a 45° Faraday rotator in optical isolators. First, single crystals of Y3 Fe5 O12(YIG), with a lattice constant of 1. 237 8 nm, were grown by means of the Czochralski method. Using the seed crystal of YIG instead of the conventional non-magnetic garnet of Gd3Ga5O12 (GGG) as a substrate,a film of BiYbIG was grown by means of the LPE method from Bi2O3 - B2O3 fluxes. The structural, magnetic and magneto-optical properties of BiYbIG LPE film/YIG crystal composite have been investigated using directional X-ray diffraction (XRD), electron probe microanalysis (EPMA), vibrating sample magnetometer (VMS) and near-infrared transmission spectrometry. The saturation magnetization 4πMs has been estimated to be about 1.2×10 6 A/m. The Faraday rotation spectrum was measured by the method of rotating analyzer ellipsometry (RAE) with the wavelength varied from 800 nm to 1 700 nm. The resultant Bi0.37 Yb2.63 Fe5 O12LPE film/YIG crystal composite showed an increased Faraday rotation coefficient due to doping Bi3 ions into the dodecahedral sites of the magnetic garnet without increasing absorption loss, therefore a good magnetooptic figure of merit,defined by the ratio of Faraday rotation and optical absorption loss, has been achieved of 21.5 and 30.2 (°)/dB at 1 300 and 1 550 nm wavelengths respectively and room temperature. Since Yb3 and Y3 ions provide the opposite contribution to the wideband and temperature characteristics of Faraday rotation,the values of Faraday rotation wavelength and temperature coefficients were reduced to 0.06 %/nm and 0.007(°)/℃ at 1 550 nm wavelength, respectively.     

鼓风炉处理铅渣探讨

文章介绍了采用鼓风炉强化熔炼铅渣，生产铅铋合金和铅冰铜的基本原理和工艺流程，以及主要经济指标。     

(Ca,Zn)O-Al_2O_3-SiO_2:Eu~(3+),Bi~(3+)的合成和光致发光的研究

用固态反应合成了(Ca,Zn)0-Al_2O_3-SiO_2:Eu~(3+),Bi~(3+)发光体。通过激发光谱和发光光谱的测试,探索了合成条件和基质组成对发光性能的影响。得到了发光体最佳组成为(0.75Ca,0.25Zn)O-0.05Al_2O_3-1.5SiO_2:0.02Eu~(3+),0.03Bi~(3+),最佳烧成温度为1100℃。实验结果表明,在这种基质中 Bi~(3+)对 Eu~(3+)有较好的敏化作用,可以提高 Eu~(3+)的发光强度。