Determination of Oxygen in Ferrosilicon by Argon-Carrier Fusion with Tin-Carbon Powder Bath

Abstract

Determination of oxygen in ferrosilicon was attempted by the argon-carrier fusion method, using carbon powder wrapped in tin foil as a bath.
With the powder sample, an unreasonably higher value was obtained than a mean value of real and original oxygen contents because the oxygen content on the surface contributes the measured value more domnanthly with the increase in surface area.
For an accurate analysis of the block sample, it is essential to obtain a mean value of oxygen contents by sampling from as many parts of the block sample as porsible, or at least from the upper, middle, and lower layers of the sample, though in the latter case it is required to specify the sampling position with the analytical results.
By the proposed method, the complete reduction of oxides is accomplished with a block sample and the determination of oxygen can be repeated with several samples for each bath.