熔鋼温度測定に關する研究(第 3 報)
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概要
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It is absolutely necessary for the practice in the melting plant to measure precisely temperatures of the molten steel in the furnace, of tapping and of casting so as to attain to the excellent products. To solve the present problem, an apparatws usiug the WC/C thermocouple has been devised, which was explained in the first and the second report. However, the WC/C thermocouple revealed some draw backs such as the difficulty in obtaining uniform quality in the available materials and the necessity in exchanging the protection tube for the hot junction in each measurement. Therefore further research was made in the line of the W/Mo thermocouple, inventing a special coating method to prevent the oxidation, using a silicon carbide-coated carbon tube as the protection for the direct contact with the liquid steel, thus developing an apparatus sufficiently applicable in the practice. The new apparatus is made of materials easily available and of low cost. Besides, the method of application is simple, free frompersonal errors and so it is suitable for the actual operation. As results of the application of the apparatus to the practice, it became possible to measure precisely the temperature change during operation in the high frequency and the open hearth furnace, and the temperature distribution in the atmosphere and the melt in the open hearth and the arc furnace, thus disclosing some facts unknown in the past. Above all, it was explained in mathematical figures that there is a more remarkable local difference in temperatures between the point just below the arc and the furnace-bottom (or the furnace-wall) in the melt of the arc furnace owing to the origin of heating when compared with the case in the open hearth furnace. Some consideration should be made regarding such remarkable facts for the guide of actual operations. It is extremely necessary for the manufacture of good quality steels and for preventing waste products to measure the temperature of the melt exactly and to control the temperature-measurement reasonably during the melting operation. It is expected that the present thermocouple would contribute so much to the future practice in general.
- 社団法人日本鉄鋼協会の論文
- 1941-09-25
著者
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