电炉钢渣活性激发研究

对电炉钢渣（熔炼渣和精炼渣）在机械激发、热激发和化学激发作用下的活性特征进行研究．研究表明：标准养护条件下，电炉钢渣活性指数随比表面积增加而显著增加；热激发作用下，电炉钢渣活性指数有较大幅度提高；热激发作用下钢渣的活性指数也随着比表面积的增加而提高；常温养护和蒸压养护条件下，精炼渣都没有表现出比熔炼渣更高的活性；无论是标准养护还是蒸压养护，电炉钢渣在各种碱存在的情况下，大多表现为强度下降，仅Na2s0。或NaOH在蒸压养护条件下对熔炼渣有激发作用，提高了熔炼渣的活性．     

一种新的锅炉热效率在线计算模型

在已有用反平衡法计算锅炉热效率的方法基础上,建立了一种新的在线计算锅炉热效率的模型.该模型只需测出汽水流量、温度、烟气成份等常规仪表所测数据,从而实现在线计算,对锅炉的安全运行和节约能耗都具有重要意义.     

论火电站集控运行模式

随着经济的发展,运用集控运行是火电站运行管理的发展趋势,是适应智能电网发展的需要。文章概括介绍了集控运行的环境条件、集控运行中注意的问题,讨论了管理方式,为传统火电站运行方式向集控运行过渡提供参考。     

Net-shape forming of composite packages with high thermal conductivity

The continuing miniaturization of electronic devices in microelectronics and semiconductors drives the development of new packaging materials with enhanced thermal conductivity to dissipate the heat generated in electronic packages.In recent years,several promising composite materials with high thermal conductivity have been developed successfully for high performance electronic equipment to replace the traditional Kovar and Cu/W or Cu/Mo alloys,such as SiCp/Al,SICp/Cu,diamond/Al and diamond/Cu.However,thes...     

一种蒸汽热力管道的安装方法

本文通过对蒸汽供热管道的分析，提出了一种蒸汽供热管道安装方法，即管道热补偿法，还详细介绍了该补偿法的安装要求。工程实践证明，管道热补偿方法可以很好地解决管道在正常运行时因热应力所造成的管道断裂或支座损坏问题。     

溴代双酚A型不饱和聚酯树脂的阻燃机理

利用TGA、DSC、热解-电导率仪,研究了文题内容。实验结果说明了溴的引入,使树脂具有良好的阻燃性,当溴含量大于7.63%(wt)时,树脂即能自熄。溴使树脂热解过程成碳倾向增加,分解生成的溴化氢是有效的自由基捕获剂。三氧化二锑和溴同时引入,对阻燃具有协同效应。     

THE INFLUENCE OF DRAWING CONDITIONS OF PET POY ON STRUCTURE AND PROPERTY OF THE FIBER

Drawing tests upon PET POY have been made by using dynamic thermal stress analyser,which show that the dynamic thermal stress of fiber is readily affected by drawing conditions. Aseries of samples have been obtained under different drawing velocities, drawing temperatures anddraw ratios. The variations of structural factors of fiber such as the orientation, crystallinity,crystallite size and the thermal shrinkage have been measured. It is proved through experimentsthat the thermal shrinkage(Y) of the drawn fiber of PET POY is influenced by the orientation (rep-resented by sonic velocity x_1) and crystallinity (x_2) of the fiber. The quantitative relationship is es-tablished using the binary regression method: Y=10.2246+2.2030x_1-26.2670x_2 The mechanical properties such as tenacity, elongation, yield stress, initial modulus and the te-nacity at 10% elongation, etc. have also been measured. The relations between the tenacity at 10%elongation (D) and drawing velocity(V), draw ratio (DR), drawing temperature (T), and sonic ve-locity and crystallinity have been obtained using a method of mathematical statistics: D=4.594-0.009 6V , D=-8.937+7.170DR, D=2.866+0.00629T, D=-7.34+2.866x_1+6.314x_2 These equations fit well with data from the experiments. This work will be benefical to the control of quality of products and the development of newproducts.     

多特征点铁水成分的热分析

加入白口化元素迫使铁水凝固成白口,使铁水的冷却曲线被扭曲,并失去了热分析冷却曲线一些重要的特征点。用铁水凝固成灰口的冷却曲线上的5个特征点作为预报铁水化学成分的判据,可以提高预报成分的精度。化学成分C、Si和5个特征点的线性相关程度是不同的。其它化学成分和铁水重熔次数也影响预报成分C、Si的精度。还提出铁水白口化倾向的补偿当量的定量表示法。