抄録
Results of the study conducted on vacuum sampling method are given. The method is almost perfect and comparatively simple in operation.
The sampler for vacuum sampling method is as shown in Fig. 1 and photo. 1.
In case of determining hydrogen content in molten pig iron in the ladle, vacuum sampling method which is different from casting method and has generally shown lower values, because of gas released during solidification of molten pig iron in the sample case.
The gas evolved during solidification of molten pig iron in the sampler of vacuum sampling method is caught at the upper part of the sampler and found in analysis.
In addetion casting method is affected by atmosphere, but vacuum method is not affected.
The vacuum sampling method is very good theoretically and easy for daily operation as compared with previous other methods.
