Abstract
In order to determine accurately gases contained in molten steel, the authors devised specially a sampling vessel made of transparent quartz, by means of which the gases in open-hearth steel were analysed.
The volume of the vessel is from 10 to 20cc. A thin copper plate is fitted at its end, and the vessel is made vacuous. When the vessel is immersed in molten steel, the copper is melted and the molten steel enters into the vessel, and simultaneously a portion of gases librates. The vessel is at once transfered to mercury bath so as to cool it, and the gases are analysed after being collected by a mercury pump, and further hydrogen in the sample is measured by a vacuum extraction apparatus at 800°C. Oxygen and nitrogen fixed in the sample are analysed by the vacuum fusion method.
