查询词典 uranium ore

It was demonstrated thermodynamically that the initial products with respect to the uranium-hydrogen system included UH, UH2, UH3, U2H2 and U2H4. The potential energy surface analyzing results confirmed that the optimized structures and suggested, theoretically, that the main initial products were UO or linear U02 in the uranium-oxygen system, and uranium monocarbide or uranium oxycarbides in the uranium-carbon monoxide system, depending on the different interaction mode.

计算结果从热力学上证明了铀与H_2的初始反应产物可能有UH、UH_2、UH_3、U_2H_2和U_2H_4 等；随着铀与O_2相互作用的方式的不同，铀氧化的初始产物或者是UO分子，或者是直线型UO_2分子；CO在铀上的吸附属于解离吸附，并以CO的碳端与铀原子相互作用最有利，初始相互作用产物主要有碳化物和碳氧化物。

Sandstone type uranium ore is a epigenetic hydrogenic uranium deposit, and its mineralizing theory is mainly on the basis of the hydrogeology and hydrogeochemistry, and many key problems need to explore in the course of uranium ore-forming have closely to do with hydrogeochemistry.

砂岩型铀矿是一种后生水成铀矿床，其成矿理论是建立在水文地质学、水文地球化学等学科基础上，矿床形成中的许多有待探索的关键问题都与水文地球化学密切相关。

This article introduced the uraniferous phosphorus ore and the Uranium reserve in phosphorus ore ,summarized the recovery method of Uranium and evaluated the recovery method of Uranium.

介绍了我国含铀磷矿及铀含量，综述了磷矿伴生铀的回收方法，并对回收方法进行了评价和探讨。

Detailed description has been given individually to the abnormal colours, lineament and circular structure and image features on the multi-geographycal information composite image. We have studied the ore control effect of circular and lineament structure to the multimetal ore, and come to the point that the Xianghualing region is a complex ore control area by circular and lineament structure.Therefore, we build a remote sensing imag model for ore field in the region. Within the circular structure, the northwest lineament crosses the northweast lineament and forms frames that control the metal ore distribution. According to the features of the found deposits and their coherent image, we conclude that there are two symbols for ore looking.

对多源地学信息复合处理图像新发现的色异常、线性和环形构造的分布、影像特征做了较详细的叙述；并探讨了该区的环形和线性构造对多金属矿的控矿作用，认为香花岭地区是环形和线形构造的复合控矿，在此基础上建立了香花岭矿田遥感影像模式：在环形构造内，发育北西向和北东向线性构造组合，交叉成"井"字型格式，控制金属矿的分布。

However, experts said Tsunehiro seamless iron ore resources through the "digging outside to inside", you can still break a certain extent, China in the world iron ore market in the dilemma has become China's iron and steel enterprises to open up new overseas iron ore supply channels to break the iron ore resource "bottlenecks" an important breakthrough in imports of iron ore so as to gradually establish a "China model" of China to face the world iron ore trade negotiations in the other a window.

但是恒博无缝管专家表示通过对铁矿石资源的&内挖外拓&，仍然可以在一定程度上打破中国在世界铁矿石市场中的窘境，成为我国钢铁企业开辟新的海外铁矿石供应渠道、打破铁矿石资源&瓶颈&制约的一次重要突破，从而逐步建立起进口铁矿石&中国模式&，成为中国面对世界铁矿石贸易谈判中的另外一扇窗。

Using many geoscientific methods, the formation mechanism and u ranium mmeralization of the Mesozoic-Cenozoic fossil hydrothermal sys tems, Southeast China, have been discussed for the first time through comprehensive studies of the two typical Mesozoic-Cenozoic uranium ore forming fossil hydrothermal systems—Xiangshan Volcanic Rock Type U ranium Ore-field and Xiazhuang Granite Type Urani um Ore-field by integration of "Three sources: Uranium and its Mineralizer Source, Water Source and Heat Source".

本文综合运用多种地质手段，通过解剖华东南地区二个典型的中新生代铀成矿古水热系统，即江西相山火山岩型铀成矿古水热系统和广东下庄花岗岩型铀成矿古水热系统，将&铀源、水源和热源&三者结合起来，首次探讨了华东南地区中新生代古水热系统的形成条件及其铀成矿作用。

In 1896, the French physicist Becquerel Republic issued a report on the work of a detailed description of the many experiments he found that uranium, uranium and its compounds have a special ability, it can automatically and continuously release of a person's invisible rays, which rays of light and general different, so that through the photographic film and photographic paper, Roentgen discovered with also different, in the absence of high-vacuum gas discharge and high voltage plus the conditions, able to uranium and uranium from automatic salt.

1896年，法兰西共和国物理学家贝克勒尔发表了一篇工作报告，详细地介绍了他通过多次实验发现的铀元素，铀及其化合物具有一种特殊的本领，它能自动地、连续地放出一种人的肉眼看不见的射线，这种射线和一般光线不同，能透过黑纸使照相底片感光，它同伦琴发现的伦琴射线也不同，在没有高真空气体放电和外加高电压的条件下，却能从铀和铀盐中自动发生。

The oxidation kinetics of depleted uranium was studied in pure oxygen pressure of 5 kPa at below 100°C by using spectroscopic ellipsometry. The relationship of the thickness of uranium oxide with time is measured. The results indicate that below 100°C in the initial period, the relationship between oxidation layer thickness and time is parabolic. The oxidation mechanism of depleted uranium is discussed and the active energy of depleted uranium at given experimental conditions is 87.165kJ/mol from calculation.

采用椭偏技术研究了45~95℃和5kPa纯氧气氛中金属铀的氧化，通过不同温度下金属铀表面氧化层厚度随时间的变化规律，得到贫铀在初始氧化阶段的表面氧化层厚度与时间的关系均呈现抛物线规律；绘制出了在不同温度下金属铀表面的氧化动力学曲线，由此得到在低于100℃，5kPa的纯氧气氛下贫铀表面形成氧化物的反应活化能为87.165kJ/mol。

Determination of the uranium content in nuclear grade uranium hexafluoride, uranyl fluoride solutions, uranyl nitrate solutions, uranium oxide, uranium dioxide, powder and pellets; gravimetric method

核子纯的六氟化铀。氟化铀溶液。硝酸溶液。氧化铀粉末。二氧化铀粉末和颗粒铀含量的测定。重量分析法

Fluorites formed in uranium mineralization period in the Zoujiashan and Shazhou uranium deposits have ε〓 values from -6.7 to -8.3 and I〓 values from 0.7145 to 0.7204, similar to their host rocks (porphyroblastic lava and sub-granodioritic porphyry) which have ε〓 values from -6.2 to -9.4 and I〓 values from 0.7121～0.7192. On diagram of ε〓- t, the fluorites and host rocks plot in similar area within the evolution field of the basement rocks at Xiangshan. The lead isotopic compositions of pyrites formed in uranium mineralization period plot as a line on diagram of 〓Pb/〓Pb vs.〓Pb/〓Pb. The host rocks plot at the lower value end. Calculation based on the slope of the line and the mineralzation age yields age of 144Ma for the geological body which provided uranium for the mineralization.

邹家山和沙洲铀矿床成矿期萤石的ε〓值(-6.7～-8.3)和I〓值(0.7145～0.7204)与赋矿围岩(碎斑熔岩及次花岗闪长斑岩)的ε〓值(-6.2～-9.4)和I〓值(0.7121～0.7192)相似，在ε〓-t图上，成矿期萤石数据点的投影范围与赋矿围岩的基本吻合，且均落在相山元古宙基底演化域范围内；成矿期黄铁矿的铅同位素组成在〓Pb/〓Pb-〓Pb/〓Pb关系图上呈线性分布，而火山岩的铅同位素组成位于此相关线的低值一端；利用异常铅线的斜率及成矿年龄计算出富铀地质体的形成年龄为144Ma，这与赋矿围岩的成岩年龄(135～140Ma)非常接近。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。