金堆城百花岭选矿厂钼浮选金属走向查定及分析

考查了金堆城百花岭选矿厂钼、硫、铜、铅在选钼流程中的走向与分布，提出了进一步优化工艺的措施和降低钼精矿铜、铅等杂质的方法。     

Growth of lead molybdate crystals by vertical Bridgman method

The growth of PbMoO₄ crystals by the modified Bridgman method has been reported in this paper. The feed material with strict stoichiometric composition is desirable for the Bridgman growth of the crystals. The continuous composition change of the melts during growth can be avoided because the volatilization of melts is limited by sealed platinum crucibles. By means of the optimum growth parameters such as the growth rate of < 1.2 mm/h and the temperature gradient of 20 ∼ 40°C/cm across the solid-liquid interface under the furnace temperature of 1140 ∼ 1200°C, large size crystals with high optical uniformity were grown successfully. The distribution of Pb and Mo concentration along the growth axis was measured by X-ray fluorescence analysis. The single crystallinity of the grown sample was evaluated by the double-crystal X-ray rocking curve. The transmission spectra were measured in the range of 300–800 nm at room temperature.     

化学沉淀法制备超细二盐基亚磷酸铅粉体

本研究采用化学沉淀法制备超细二盐基亚磷酸铅粉体，讨论了各种因素对二盐基亚磷酸铅颗粒度的影响。利用透射电子显微镜、激光粒度分析仪和x射线衍射仪等分析手段对粉体进行了表征。结果表明选择合适的反应介质、分散剂及搅拌速度可以得到粒径280nm左右的二盐基亚磷酸铅超细粉体。     

Life cycle inventory analysis of CO2 and SO2 emission of imperial smelting process for Pb-Zn smelter

Based on the principle of life cycle assessment, CO₂ and SO₂ emission of Imperial Smelting Process in a certain zinc-lead smelter was analyzed by life cycle inventory method. According to the system expansion and substitution method, the environmental impacts of co-products were allocated among the main products of zinc, lead and sulfuric acid. The related impacts were assessed by use of Global Warming Potential (GWP) and Acidification Potential (ACP). The results show that the GWP index from 1998 to 2000 is 11.53, 11.65, 10.93 tCO₂-eq/tZn respectively, the ACP index decreases from 14.88 kgSO₂-eq/tZn in 1998 to 10.99 kgSO₂-eq/tZn in 2000. Power and electricity generation, followed by smelting and zinc distillation, are mainly responsible for GWP. Sintering individually affects ACP. Reduction in greenhouse gas emissions of the ISP may come from energy conservation measures rather than from technological developments. And recycling more secondary Pb and Zn materials effectively treated by ISP, and reducing the amount of primary metal are the main ways to put SO₂ emission under control. Biography of the first author: LI Qi-hou, postdoctor, born in Aug. 1972, majoring in ecodesign and the structure and morphology control of powders.     

铅酸蓄电池剩余放电容量快速预测技术

电动车里程预测技术是电动车走向实用的一个不可缺少的技术，现有的预测技术尚不能适应快速和实用要求，本文从蓄电池化学反应过程和电池结构出发，分析了影响电池放电容量的因数，采用蓄电池最大电流瞬时扫描测试，通过实验寻求铅蓄电池瞬态最大放电电流与剩余放电电量之间的联系，从而提出一种简便可行的预测方法。     

碳酸铅纳米粉体的制备与表征

以醋酸铅和碳酸钠为原料 ,选择优化的工艺条件 ,用化学沉淀法制备分散性良好的碳酸铅纳米粉体。XRD和TEM分析表明 ,纳米碳酸铅属斜方晶系 ,其颗粒呈球形 ,粒度分布均匀 ,为5 0nm左右。     

萃取法去除氯化稀土溶液中铅的工艺研究

采用胺类萃取剂与醇类萃取剂共同组成的协同萃取体系,在盐酸介质中,研究了去除氯化稀土溶液中铅的工艺。     

Formation and properties of AgInSe2 thin films by co-evaporation

The electrical and optical properties of silver indium selenide thin films prepared by co-evaporation have been studied. X-ray diffraction indicates that the as prepared films were polycrystalline in nature. The lattice parameters were calculated to be a=0.6137 and b=1.1816 nm. Composition was determined from energy dispersive analysis of X-ray. Silver indium selenide thin films were also prepared by bulk evaporation of powdered sample for comparative study. They have an optical band gap (E_g) of 1.25 eV and it is a direct allowed transition. Refractive index (n) and extinction coefficient (k) were calculated from absorption and reflection spectra. Steady-state photoconductivity was measured from 300 to 400 K. Carrier lifetime was calculated from transient photoconductivity measurements at room temperature at different intensities of illumination.     

架空平行集束导线的运用及推广

国家电力公司为进一步加强科技进步工作，提高农网的科技含量，以保证农网安全、经济、可靠的运行，在农村低压配电网建设与改造方面，大力采用新技术、新设备。扩大试点的架空平行集束导线供电模式，就是这项工作的重要内容之一。本文就架空平行集束导线与裸导线的经济技术比较及显著的防窃电性能进行阐述，指出在农网改造中应广泛采用该项新技术。     

银川部分污灌区生产大米铅含量分析

采用电感耦合等离子体-原子发射光谱(ICP-AES),测定分析了银川地区紫金花造纸厂污灌区生产大米的铅的质量分数.分析结果显示:该污灌区生产大米中铅的质量分数平均值为4.5mg/kg(n=5),RSD<1%,超过国家对食品中铅的质量分数规定的最高限定值10倍,说明该大米已不能食用;由于尚未超过国家对动物饲料规定的铅的质量分数的最高限定值,因此它尚可作为饲料,但已接近临界状态.