Determination method of total iron in iron ore powder
A detection method, iron ore powder technology, applied in the direction of material excitation analysis, electric excitation analysis, etc., can solve the problems of complex and cumbersome process, long time-consuming, high requirement of chemical analysis skills, avoid digestion process, simple and fast method, reliable results Effect
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Embodiment 1
[0019] figure 1 Schematically provides the flow chart of the detection method of total iron in iron ore powder of the embodiment of the present invention, as figure 1 Shown, the detection method of total iron in described iron ore powder may further comprise the steps:
[0020] (A1) Sampling iron ore powder, diluting with a diluent such as tungsten trioxide, dilutes the Fe content in the sample, avoids saturated self-absorption caused by too high Fe spectral intensity, and balances the matrix differences caused by various iron ore matrices, Reduce matrix effect;
[0021] mixed with a buffer (such as a mixture of carbon and lithium carbonate);
[0022] (A2) The mixture is placed in the electrode, and in the electrode, the mixture surrounds a groove, from top to bottom, the inner diameter of the groove is from R 1 change to R 2 , R 2 1 , and R 1 is the inner diameter of the electrode, that is, the thickness of the mixture attached to the inner wall of the electrode increas...
Embodiment 2
[0027] An application example of the method for detecting total iron in iron ore powder according to Embodiment 1 of the present invention.
[0028] In this application example, the diluent is spectrally pure tungsten trioxide, and the buffer is a mixture of 95% carbon and 5% lithium carbonate; WO 3 +C→WC+CO 2 , the WO with low melting and boiling point and easy evaporation 3 Convert to hard-to-evaporate WC, suppress W evaporation, reduce diluent WO 3 Spectral interference; lithium carbonate is used to increase the temperature of the arc flame and maintain the stability of the arc flame; the groove is in the shape of an inverted ball table, and the distance from the bottom of the groove to the top of the graphite electrode That is K = 0.5; use the internal standard method to detect the total iron content
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Abstract
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