鋼浴温度連続測定法の検討 : 溶鋼温度の連続測定について I

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To make sufficient control of the casting temperature that is one of the important factors in ingot making, the temperature change in ladles must be known precisely and successively. A technique of continuous immersion pyrometry has been developed which was established to measure the temperature of steel bath in a ladle uninterruptedly from tapping to casting. In this method, a long hollow steel spindle covered with refractory sleeves and a refractory endblock (stopper head) is used as the protecting tube of thermocouples, with additional silica sheaths inserted into the top of the endblock. This protecting rod is held vertically in molten steel. After some preliminary tests have been made, the continuous measurement of temperature in ladle becomes a daily work, and the casting temperature is being controlled precisely. Up to now, the results obtained from these measurements are as follows : (1) In a ladle, the slag layer seems to be a good and effective thermal insulator, so the temperature of molten steel in the upper part is considerably higher. Therefore, the temperature of casting stream rises gradually. (2) The larger the capacity of a ladle, the smaller the rate of temperature drop of molten steel in the ladle. (3) The variation of temperature drop from tapping to casting in large ladles is smaller than that of small ladles. (4) From the above results, it is known that the casting temperature is not necessarily estimated from the tapping one, which will stimulate the discussions on the significance of the measurement of casting temperature.
社団法人日本鉄鋼協会の論文
1961-10-01

鋼浴温度連続測定法の検討 : 溶鋼温度の連続測定について I

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