Takuho Ikegami and Shôji Morita
The amount of error caused by reducing effect of sulphide on ferric iron in determining FeO in slags and iron ores was examined and estimated with the artificial sample prepared by mixing FeCl3 solution and CaS or MnS. The results obtained showed that the error was proportional to th e amount of sulphide sulphur and ferric iron contained in the sample, but was almost to the kind of sulphide. These results having been applied to actual samples, the error included in the analytical value of FeO was found to be less than about+2% at most in the case of ordinary basic open-hearth slags which were low in Fe2O3 and sulphide sulphur content, but amounted to 7∼70% in the case of pyrite cinder and some iron ores which were relatively high in Fe2O3 and sulphide contents, except for such special case as gumma ore in which the content of HCl-soluble sulphide sulphur was nearly zero and therefore the error in FeO value might be considered to be zero.
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