查询词典 Fe

Hydrogen Decrepitation has been used as an efficient and economical method in producing coarse NdFeB powder.

研究了氢对Nd-Dy-Fe-B磁体制作过程的影响，主要包括氢对HD磁粉的氧化和对其后烧结磁体磁性能的影响。

Texture is obtained by hot-pressing deformation at 700℃ with a deformation rate of 10－4～10－3/s and, with the increment of deformation ratio,(006) texture is further strengthened. In addition, the initial texture of Nd-Fe-B

在700℃，形变速率为10－4～10－3/s的热压变形工艺下，得到以(006)晶面的衍射峰为主峰的织构，即(006)织构，随形变量的增大，(006)织构进一步增强。

The effects of the dehydration parameter such as temperature, electric field, demulsifier, the concentration of the iron sulfide, polymer, and water in crude oil on the dehydration current was investigated in this experiment. The reasons that the Electric field of the dehydrator is collapsed were analyzed. And some methods could decrease the dehydration current were put forward.

利用该套小型静态模拟电脱水器试验装置考察了在直流电场下，脱水温度、脱水场强、破乳剂、Fe含量、聚合物含量、碱含量表活剂含量和原油含水量等因素对脱水电流的影响，分析了电脱水器垮电场的原因，并提出了降低原油乳状液脱水电流的方法。

Results:A 3-D FE model of normal maxillary and dentition were constructed.

结果：获得了形态细致逼真的上颌骨及牙列三维重建生物医学模型。

So the proposed method in this dissertation not only meet the requirements for fossil-fuel unit set in GB/T 12145-1999, but also can effectively restrain condensate and feed water system corrosion. Thereby the proposed method can reduce the loss by corrosion's leading accident, lower Fe content in boiler feed water, slow the boiler's scaling speed, delay boiler's chemical cleaning interval, effectively enhance unit's reliability, usability and using life and solve the problem of poisonous chemical deoxidant. So the proposed method can economize substantial expense for power plant.

所以，本文所提出的汽包炉有限氧化性水化学工况不但能满足GB/T12145-1999中对火力发电机组及蒸汽动力设备的要求，而且可有效抑制凝结水和给水系统的腐蚀，减少因这些部位腐蚀损坏而引发的事故停机损失，降低锅炉给水中的金属含量，减轻炉内的结垢速度，延长锅炉的酸洗间隔，有效提高机组的可靠性、可用率和使用寿命，同时也解决了有毒化学除氧剂的使用问题，为电厂节省大笔运行费用。

New type of water chemistry for utility drum boiler and its principle and characteristic Two kinds of water chemistry's main principle and characteristic are detailedly analyzed. Against the problem of high eroding speed, high Fe content in feed water and boiler water, high scaling speed, short chemical cleaning interval, needing poisonous chemical deoxidant, etc for drum boiler's deoxidization water chemistry and difficulty of using oxidation water chemistry, a new type of water chemistry is put forward on the basis of analyzing the characteristic of whole power station's water steam cycle system, principle of two kinds of water chemistry and their practical effect in every cycle stage. Considering two water chemistry's merit, a new water chemistry called Limited Oxidation Water Chemistry is put forward, which is a local slight oxidization no-deoxidant water chemistry. And the proposed method's principle, control parameter, applying condition, start-lay up and emergency measures are initially calculated and analyzed.

三、新型汽包炉水化学工况的提出及其原理和特点详细分析了国内外现行两大类水化学工况处理的核心原理和特点，针对现行汽包炉还原性水化学工况处理所存在的系统腐蚀速度相对较大、给水和炉水铁浓度高、锅炉结垢速度快、机组酸洗间隔短、无法避免有毒化学除氧剂的使用以及氧化性水化学工况在汽包炉机组上应用的困难等问题，在详细分析电站整个水蒸汽循环系统的特点、两类水工况处理的原理和对循环中各段处理的实际效果等的基础上，综合两者的优点，提出了一种新型的局部轻微氧化性无除氧剂汽包炉水化学工况－"汽包炉有限氧化性水化学工况"处理原理，并初步计算、分析和确定了该种新型水化学工况的主要工艺控制参数、应用条件、启停与紧急情况处理等。

But it is difficult to find a perfect method to control drum boiler's corrosion. Now deoxidization water chemistry for drum boiler has the characteristics of high corrosion speed, high Fe content in feedwater and boiler water, high scaling speed, short chemical cleaning interval and needing poisonous chemical deoxidant, etc.

火力发电站由于大量使用金属材料，并且金属材料的使用环境大都接近其极限使用条件，因而常由腐蚀而引发事故，造成重大损失。

Deoxidation reaction is one way to synthesize nanometer Fe powder, which is of simple technics and low cost and the easily controlled conditions.

还原法是一种工艺简单，成本低廉，且条件比较容易控制合成纳米铁粉的方法。

In this work, nanometer powder was synthesized in solution by the raw material FeCl_2 and deoxidation agent diamine hydrate.

本文是以FeCl_2为原料，用水合肼在溶液中将Fe~(2+)还原成纳米铁粉。

The deoxygenation method which is often used in China at the present,both physical method(heating power deoxygenation ,analysis deoxygenation ,vacuum deoxygenation )and chemical deoxygenation (hurling Na-2SO-3 method directly,Fe filings method,hydrazine method) have a certain problem when is used in middle or small boiler supply water.

国内目前常用的锅炉除氧方法，无论是物理法(热力除氧、解析除氧、真空除氧)还是化学除氧(亚硫酸钠直接加入法、铁屑法、联氨法)，应用于中小型锅炉补给水的除氧都存在一定问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。