锶的

The process,using strontium nitrate and ammonium bicarbonate as raw materials to develop and produce high purity strontium carbonate is introduced.

介绍了以硝酸锶和碳酸氢铵为原料，研制生产高纯碳酸锶的工艺过程。

Ore source of celestite mineralization system is complex in this area. Weathering and erosion of the floor of the basin and the mountain around the basin, evaporite sediment in the earlier, deep water, Mesozoic and Cenozoic volcanism can provide the strontium. In particular, serving as initial ore source, oil-field brine supplies the majority of strontium.

该区矿源场分析表明，锶的来源有基底和周边山系风化剥蚀来源、老含盐地层补给、深部水和中、新生代火山活动补给；其中，盆地基底和周边老山风化以及深部水补给为主要来源，特别是油田水作为矿源层为锶矿床的形成提供了大量锶源。

In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

在前半部分的真空铝热还原法中，根据锶的性质、相关反应的热力学计算及真空铝热还原法原理，通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较，得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素，具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响，还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响，得出具体结论如下：(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度；(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度，比之常压下可降低150℃之多；(3)在1150℃恒温2.5h、真空度达到5Pa的条件下，SrCO_3的分解率几乎保持稳定在99％；(4)氧化锶的还原率随还原剂过量系数的增大而增大，但是趋势越来越小，当过量系数超过25％后，氧化锶的还原率几乎不再增加；(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加；(6)氧化锶的还原率随制团压力的增加而增加，但超过一定值后，氧化锶的还原率反而会下降；(7)氧化锶的还原率随还原温度的升高而增加；(8)氧化锶的还原率随还原时间延长而增加，在本实验条件下，超过2.5h趋于稳定。

Based on the strontium concentration,isotope composition of the dolomites,the dolomitization fluids were accordingly inferred here.

根据白云岩的锶舍量和锶同位素组成，结合相关岩石学和地球化学资料，本文研究了白云石化过程中锶的迁移和相应的同位素变化。

The deposit is known for higher resistivity of the ores than the wall rocks, high mean content (1612 x 10 -6 ) of strontium in the tuff and ever higher (4597 x 10 -6 ) in the porphyrite, and prominent biogeochemical anomaly associated with the plant ecologic variation in the mining area.

根据锶矿为强电阻体，矿石与围岩电性差异大，龙王山组晶屑凝灰岩中锶的平均含量高（1621×10－6），安山玢岩含锶量更高（4597×10－6），矿区生物地球化学异常显著，常见的植物生态呈现变异现象等特征，研究归纳出溧水爱景山锶矿床综合技术方法找矿模型，在所预测的远景区中，发现了锶矿。

Meanwhile,from the angle of strontium hydroxide ′ s market supply-and-demand and related influencing factors,such as capacity,output,and supply and demand situation of the major strontium hydroxide manufacturers in the world,were introduced based on the analysis and comparison on large amounts of data and information,and future production capacity,output,and market of strontium hydroxide were analyzed and forecasted.

同时从氢氧化锶市场供给、氢氧化锶市场需求及影响市场供求因素角度出发，通过大量数据、资料的分析及对比，对全球范围内的氢氧化锶主要生产企业产能、产量及供应与需求情况进行了介绍，并对氢氧化锶的未来产能产量及市场进行了分析与预测。

It ′ s production processes with strontium carbonate as raw material were briefly introduced.

简述了以工业碳酸锶为原料生产氢氧化锶的生产工艺。

Purity control in producing metallic strontium using vacuum aluminothermic reduction was analysed by thermodynamic calculation.

对真空铝热还原法制备高纯金属锶的纯度控制进行了热力学分析；探讨了锶、钡和钙的临界还原温度、蒸气压等热力学参数差异，并制定了制备高纯金属锶的工艺。

Reaction mechanism of Sr preparation using vacuum aluminothermic reduction ;2. Purity control in producing metallic strontium using vacuum aluminothermic reduction was analysed by thermodynamic calculation.

对真空铝热还原法制备高纯金属锶的纯度控制进行了热力学分析；探讨了锶、钡和钙的临界还原温度、蒸气压等热力学参数差异，并制定了制备高纯金属锶的工艺。

Objective To determine the content of blood strontium for diagnosis of deathful causes of drowning and postmortem submergence. Methods The content of Sr content in the water sample of Nan Du River on Hainan Province, and in the left heart's blood sample of rabbits died of drowning, postmortem submergence were determined with ICP-XSP. The results were compared with that the controls.

目的 研究动物溺水死后不同时间血锶的变化方法以高频电感偶合等离子体光谱分析仪检测外样水体中锶离子含量，并分别测定家兔溺死与死后入水的左心血的锶含量。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。