Detection method for total iron in iron ore powder

A detection method and technology for iron ore powder, applied in the direction of electrical excitation analysis, material excitation analysis, etc., can solve the problems of complex and tedious process, long time consumption, and high requirements for chemical analysis skills, so as to avoid the digestion process, the method is simple and fast, and the testing personnel less demanding effects

Active Publication Date: 2019-04-09
FOCUSED PHOTONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole process is complex and tedious, takes a long time, and requires high chemical analysis skills of testers

Method used

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  • Detection method for total iron in iron ore powder

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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

The invention provides a detection method for total iron in iron ore powder. The detection method for the total iron in iron ore powder comprises the following steps that: (A) sampling the iron ore powder, and after the iron ore powder is diluted by diluent, mixing with buffering agent; (A2) putting mixture in an electrode, and surrounding a groove by the mixture in the electrode, wherein the internal diameter of the groove is changed into R2 from R1 from top to bottom, R2 is smaller than R1, and R1 is the internal diameter of the electrode; and (A3) utilizing an electric arc emission spectrummethod to detect the mixture, and obtaining the content of the total iron in the iron ore powder. The method has the advantages of high accuracy, high speed, low cost and the like.

Description

technical field [0001] The invention relates to metal detection, in particular to a method for detecting total iron in iron ore powder. Background technique [0002] Iron content is an indicator that directly determines ore grade. In actual mining, beneficiation and smelting, it is necessary to measure the iron content in iron ore in time and quickly, and then arrange the most reasonable and effective production process according to different ore grades. [0003] Existing technology solutions: There are two methods for determining the total iron content in iron ore in the national standard: "GB / T6730.65-2009 Titanium Trichloride Reduction Potassium Dichromate Titration Method" and "GB / T 6730.66- 2009 Automatic potentiometric titration method, in addition to this, the commonly used method is stannous chloride reduction potassium dichromate titration method. In the method, the sample needs to be digested and filtered first, and the filter residue is burned, acidified, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/67
CPCG01N21/67
Inventor 徐桔红梅培俊喻正宁
Owner FOCUSED PHOTONICS
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