フェロシリコン，フェロモリブデン，フェロクローム，フェロシリコンマグネ，フェロマンガン，カルシウムシリコンの螢光X線分析

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タイトル別名
  • Fluorescent X-ray Analysis of Ferrosilicon, Ferromolybdenum, Ferrochromium, Ferrosilicon-Magnesium, Ferromanganese and Calcium-Silicon
  • フェロシリコン , フェロ モリブデン , フェロクローム , フェロシリコンマグネ , フェロ マンガン , カルシウム シリコン ノ ケイコウ Xセン ブンセキ

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抄録

A study has been made, by using the Shimadzu-A.R.L. X-ray Quantometer, mainly on the analytical precision and the sample preparation in connection with the control analysis of some ferroalloys for cupola operations. The samples for six kinds of ferroalloys are prepared and analyzed under the same conditions.<BR>Three to five elements of each kind of ferroalloys are determined simultaneously, i.e. Al, Si, Mn and Fe in ferrosilicon; Si,Fe and Mo in ferromolybdenum; Si, Cr, Mn and Fe in ferrochromium; Mg, Si and Fe in ferrosilicon-magnesium; Si, Mn and Fe in ferromanganese, and Al, Si, Ca, Mn and Fe in calcium-silicon.<BR>Samples are prepared by the briquette technique. The amount of the binder is reduced to minimize the decrease in X-ray intensity due to the dilution effect of the matrix; e. g., one g of stearic acid is added to 15 g of each sample.<BR>The following conditions are most suitable from the standpoint of rapid analysis:<BR>(1) The time for crushing a sample is 2 minutes.<BR>(2) The sample briquetting pressure is 60000 pounds/in2.<BR>(3) The integral time by the external standard monitor system is 3 minutes.<BR>\oindentUnder these conditions, each of the elements in the six ferroalloys can be determined with a coefficient of variation below 1.7 per cent, with the exception of Si in ferrochromium and ferromanganese. Because the light element Si in ferrochromium and ferromanganese is small in content, its coefficient of variation is several per cent in the integral time of 3 minutes. However, its reproducibility can be improved by lengthening the integral time. The time required for analyzing one sample, including the sample preparation, is about 10 minutes in all the cases.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 32 (5), 473-478, 1968

    公益社団法人 日本金属学会

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