FURTHER DATA ON OPERATING COST OF A PLATINUM-WOUND RESISTANCE FURNACE1

The results derived on the cost of operating a platinum-wound resistance furnace after one year's use, are presented.     

电阻炉温度的智能化控制

:针对提高电阻炉温度的控制质量 ,研究了利用单片机实现以微分先行、P -PI为控制算法的智能化控制方案 ,给出了单片机的硬件组成和控制算法。实践证明该控制方案在性能指标如超调量、稳定时间和稳态误差等方面 ,取得了较为满意的结果     

艾奇逊炉石墨化后期炉内电阻的控制

通过对一理想模型的推算，比较模型与实际的结果，推算石墨化炉通电后期电阻公式。利用这一公式，可以通过调整装炉方法、产品规格等，选择合适的后期炉阻，以便最大限度地有效利用现有的石墨化炉和供电系统，充分发挥设备的最大功率和最大电流，生产出高质量的石墨化产品。     

石墨化炉用电阻料的改进

根据对石墨化焦、生焦特性的分析，得知用石墨化焦作电阻料能得到相对均匀的温度场，温度梯度较小。决定大规格电极用石墨化焦来取代混合焦作电阻料，并结合其特性，对曲线进行了改进，在保证品级率的前提下提高了电级的成品率。     

A LABORATORY LOAD FURNACE1

This paper illustrates the advantages of the laboratory load furnace. The points emphasized are: (1) direct application of load to specimen; (2) perfect alignment of specimen beneath the load; (3) control of temperature; (4) control of specimen chamber atmosphere; and (5) measurement of volume changes of the specimen throughout the test.     

甲烷化炉催化剂阻力上升原因分析及处理

分析甲烷化炉催化剂床层阻力上升的原因,采取了催化剂撇头应急处理,装置再开车后,从工艺运行数据分析判断此次撇头处理非常成功,完全能满足工艺运行要求。     

A SMALL GAS-FIRED LABORATORY FURNACE1

There is described a small furnace, particularly suitable for experimental work in ceramics. This furnace is unique in that temperatures sufficiently high for nearly all operations in ceramics can be obtained by the use of a standard Méker burner. The temperature can be brought up rapidly and can be held steadily. The construction of the furnace makes it comparatively simple and inexpensive.     

6－甲氧基－1－四氢萘酮的简便合成法

以苯甲醚为原料，经酰化、黄鸣龙还原、环合及氧化等一系列改进的方法，合成了６－甲氧基－１－四氢萘酮，提供了一条较为简便的合成方法。     

6－甲氧基－1－四氢萘酮的简便合成法

以苯甲醚为原料，经酰化、黄鸣龙还原、环合及氧化等一系列改进的方法，合成了６－甲氧基－１－四氢萘酮，提供了一条较为简便的合成方法。     

镍铬电阻丝与铬酸镧元件双加热系统高温电阻炉研究

1800℃高温电炉是材料研究过程中重要的高温设备,在本文中通过对铬酸镧加热元件的性能分析,扬长避短,采用电阻丝与铬酸镧加热棒共同作为热源的双加热系统,设计了合理可行的高温耐热和和隔热材料,并进行了升温性能的测定,以及最大温升速度的测定,得出了该高温炉的基本性能。     

A NEW HIGH TEMPERATURE FURNACE CONTROLLER1

The need for accurate control of an oil-fired furnace operated at a temperature above the range of platinum thermocouples led to the development of a new type controller. Disadvantages of ordinary types of controllers are discussed. The mounting of the radiation pyrometer used is described. Full details of the construction and operating principles of the controller are given. Results obtained are far better than with most careful hand control.