Abstract
Spiral carbon vacuum furnace have been completed, which will satisfy most of the conditions required as such in the vacuum fusion, one of the metlbods of gas analysis in steel. 2000° Cent., could be attained in it with the power of 2·4K. W.
The following are investigated with this vacuum furnace:
1. The effects on measured values of various elements, which evaporating in the oxygen analysis of test pieces and adhering to the inner walls of reccptacles.
2. The results of analyses of various kinds of graphite crucibles.
3. Tne rate of deoxidation due to temperatures of each oxide and test pieces containing the oxide, to determine the adaptability of the fractional vacuum extraction method.
4. The manufacture of rapid analysis apparatus to complete the analysis within 40 minutes after preparing samples from molten steel, which has proved possible.
