查询词典 platinum process

In this paper, two assemblies of special test equipments have been designed and fabricated by authors in our laboratory: namely Catalyst Molding Process Analyzer and Catalyst Mechanical Process Tester. These new skills are developed for the dynamic studies on whole mold forming process and crushing process of Fe-Cr WGHS catalyst pellet. Based on the orthogonal experimental design, the effects of some factors during the forming process of solid catalyst, such as predensification proportion, calcination time, calcination temperature and content of graphite on the mechanical strength of catalyst pellets are systematically examined, and the molding conditions have been optimized. Based on the experimental data, the relationship between catalyst density and forming pressure are educed, and the physical significances of some related parameters are described. The parameter of macro scopic elastic moduls has been suggested to character the mechanical properties of molding catalyst. The effects of molding pressure on mechanical properties of catalyst pellets are discussed, and results show that there exists a optimal molding pressure for the ideal mechanical properties: when over-high or over-low pressure is applied, the specific surface area and side crushing strength of catalyst pellets will decreased. The "rebound effect" will be undermined by the unsuitable pressure maintain process, resulting in the apparent decrease of mechanical strength of catalyst pellets.

本研究通过自行设计制造的催化剂模压成型过程分析仪（Catalyst Molding Process Analyzer， CMPA）和催化剂力学性质测试仪（Catalyst Mechanical Properties Tester， CMPT），以Fe-Cr系高温变换催化剂片剂为研究对象，对成型过程和受压破碎过程提供了全过程动态研究的新手段；本研究利用正交实验设计方法考察了固体催化剂成型过程中诸因素（包含预密致比例、煅烧时间、煅烧温度和石墨含量等）对催化剂成型体强度的影响，并对成型条件进行了优化；根据实验结果，关联确定了固体催化剂成型过程中的密度－压力关系式，并对方程中诸因子的物理意义进行了描述；提出了一种利用宏观弹性模量来表征成型催化剂的力学性质的方法；研究讨论了成型压力对催化剂成型体强度性质的影响，结果表明：对于催化剂成型体的强度和比表面性质，成型压力存在着一个最佳值，过高的成型压力会导致比表面积和侧压强度的降低；不适当的成型压力的维持时间会破坏&压力回弹&作用，造成催化剂成型体的机械强度明显降低。

A integrated mathematical model was established in accordance with the process of metallurgical production and it was composed of the process models and the raw materials distribution models. The process models include the sintering process model, the pelleting process model and the iron making process model.

数学模型分为6个子模型，其中工艺模型有烧结机优化模型、竖炉优化模型、高炉优化模型，物料配置模型有铁精粉优化配置模型，烧结矿优化配置模型和球团矿优化配置模型，模型之间交互的数据流为原料或产品的物料流量、物料性能、价格及原料性能的影子价格。

Ian Leake is a fine art photographer, who uses an increasingly rare process of platinum printing to create simple nude compositions that "celebrate beauty".

Ian Leake 是个不错的艺术摄影师，他使用越来越罕见的铂印刷过程来创作简朴的裸体作品，名曰"歌颂美"。

This platinum process was highly praised by Alfred Stieglitz and other pictorial photographers in the early years of the twentieth century. Stieglitz called the platinotype "the prince of all processes".

这种印像法在二十世纪初很受以阿尔佛莱德·斯蒂格利兹为代表的画意摄影派推崇，斯蒂格利兹称其为"所有印像法中的王子"。

It was found that the reactions at electrochemical impregnating process have different order at nickel and platinum base.

在第五章中，应用空穴微电极对阴极电沉积过程的反应进行了研究，发现以铂和镍为基底进行电沉积时发生反应的先后顺序不同。

Process:① the platinum wire dipped in concentrated hydrochloric acid to colorless colorless flame on the ignition;②sample in the colorless flame ignition, to observe the flame color (if test potassium cobalt glass through observation, because in most cases need to be used when the system of potassium sodium, potassium solution, therefore often contain sodium, and sodium yellow flame color reaction, a small amount of yellow and purple, respectively, can not come out).

3操作过程：①将铂丝蘸浓盐酸在无色火焰上灼烧至无色；②蘸取试样在无色火焰上灼烧，观察火焰颜色(若检验钾要透过钴玻璃观察，因为大多数情况下制钾时需要用到钠，因此钾离子溶液中常含有钠离子，而钠的焰色反应为黄色，黄色与少量的紫色无法分别出来)。

In the case of platinum, this process has the added advantage that it wastes very little metal .

对铂来说，这种加工方法还有另一优点，即损耗金属极少。

The paper presents a process for recovering platinum in the spent catalyst from petrol reforming,i.

介绍一种从石油重整废催化剂中回收铂的工艺。

The song stayed on the charts for two months, receiving a platinum record in the process.

这回运气好像是好多了，这首歌在排行榜上稳稳停留了两个月，唱片销量更是达到白金的成绩。

This platinum process was highly praised by Alfred Stieglitz and other pictorial photographers in the early years of the twentieth century.

在1873年发明。与银盐法不同，铂钯元素不受光的影响，印像过程依据的是一定量的铁盐合成在紫外光的作用下按照曝光的时间和强度而改变。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。