Development of an Automatic Analyzer for a Mixed Nitric Acid, Hydrofluoric Acid, and Iron Ion in the Pickling Process

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The method of sulfuric acid analysis is well established. At present, the concentration of sulfuric acid can be analyzed automatically on actual production lines by using neutralization titration method. With the case of a mixed solution of nitric and hydrofluoric acid, however, measuring each acid content and the concentration of iron contained therein with speed and accuracy suitable for actual operation is very difficult even using the presently available acid separation techniques. A primary reason for this is that no piece of equipment with that level of measuring capability has not been developed yet.<br> In the preliminary studies, the followings are verified: <br>(1) As a method of analyzing hydrofluoric acid, the iron-acetylacetone complex discoloration absorbance method is adopted.<br> (2) As a method of analyzing nitric acid, the method of subtracting the concentration of hydrofluoric acid from the total acid amounts obtained by neutralization titration is adopted.<br>(3) As a method of analyzing the iron content, the iron-salicylic acid complex absorbance method is adopted.<br> By fully automating the series of analytical processes described above, the following are achieved: <br>(1) The several hours needed to complete the analysis work can be shortened to about 40 min. Moreover, acid can be controlled with care and attention to detail, which will greatly contribute to the improvement of the quality of pickled coils.<br> (2) The work load of line operators can be reduced, making substantial labor saving possible.

収録刊行物

  • ISIJ international

    ISIJ international 37(1), 47-54, 1997-01-15

    The Iron and Steel Institute of Japan

参考文献:  8件中 1-8件 を表示

  • <no title>

    ERIKSSON T.

    Anal. Chim. Acta 63, 445, 1973

    被引用文献1件

  • <no title>

    ERIKSSON T.

    J. Iron Steel 211, 581, 1973

    被引用文献1件

  • <no title>

    Leco Co.

    Catalogue of AT-50

    被引用文献2件

  • <no title>

    INOKUMA Y.

    J. Chem. Soc. Jpn. 10, 1469, 1980

    被引用文献1件

  • <no title>

    TAKAHARI T.

    Iron Steel 11, 1612, 1984

    被引用文献1件

  • <no title>

    OOTA T.

    CAMP-ISIJ 8, 980, 1995

    被引用文献1件

  • <no title>

    MCKRENEY J. P.

    Anal. Chem. 40, 1276, 1968

    被引用文献1件

  • <no title>

    Patent Jp. No. H07-294509

    被引用文献1件

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