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Method for determining phase content in iron ore

A technology of iron ore and phase, applied in the field of determination of phase content in iron ore, can solve the problem that the phase phase diffraction intensity is not proportional to the content, it is difficult to popularize and apply, the external standard does not match the matrix of the sample to be tested, etc. problem, to achieve the effect of expanding the linear range and scope of application

Pending Publication Date: 2022-06-07
连云港海关综合技术中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical application, due to the mismatch between the external standard and the sample matrix to be tested, and the non-proportional relationship between the diffraction intensity and content of each phase in the multiphase mixture, it is difficult to popularize and apply the method.

Method used

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  • Method for determining phase content in iron ore
  • Method for determining phase content in iron ore
  • Method for determining phase content in iron ore

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0063] 1.1 Instrument and test conditions

[0064] X-ray diffractometer PANalytical Empyrean, diffraction source Cu Ka, tube pressure 45kV, tube flow 40mA, goniometer radius 240mm. Glass plate sample preparation, filling depth 0.5mm. Step scan mode, step 0.0131°, point scan time 43.10s, 2θ angle range 10-80°, PHD 45-70%. The reagents used in the preparation of standard samples were all excellent grades, and an electronic balance with a sensitivity of 0.000lg was used. All tests were measured on two parallel slices.

[0065] 1.2 Reference materials and samples

[0066] Grind the raw materials until they all pass through a 200-mesh standard sieve, and dry them in a muffle furnace at 105° C. for 1 hour before use.

[0067] 1.3 Standard sample

[0068]

[0069]

[0070]

[0071] 1.4 Working curve

[0072]

[0073] 1.5 Sample Test

[0074]

[0075]

[0076] The method for determining the phase content in iron ore can provide a standard sample with a high de...

example 2

[0078] External standard method: Xin Yanqing used X-ray diffraction-external standard method to quantitatively analyze the phase of zinc oxide and yttrium oxide powder mixture, which verifies the application of external standard method in the test of two-phase mixture. Wu Jianpeng established X-ray diffraction-external standard method phase quantification standard curves for 9 components commonly used in inorganic non-metallic materials such as quartz and corundum. Each curve was established based on a two-phase gradient mixture. The external standard method is affected by the mass absorption coefficient. In the multiphase test, the reference material needs to be completely matched with the matrix of the sample to be tested. In theory, it is impossible to have the same phase composition and content as the sample to be tested. The influence of the mass absorption coefficient results in a narrow application range of the external standard method, which is suitable for samples comp...

example 3

[0080] Full spectrum fitting method: Zeng Ling used X-ray diffraction-Rietveld full spectrum fitting method to analyze Fe in iron ore 2 O 3 , FeOOH, SiO 2 , A1 2 (Si 2 O 5 )(0H) 4 The composition of a total of 4 kinds of mineral phases, their contents are 86.20%, 9.59%, 3.58%, 0.64%, respectively. The full spectrum fitting method is a method to obtain the content of each phase when the theoretical spectrum is corrected by adjusting the experimental parameters, peak shape parameters, etc., according to the structural data of each phase, so that the theoretical spectrum matches the measured spectrum to the greatest extent possible. The full spectrum fitting method is essentially a semi-quantitative method. It is a theoretical guess. First of all, it is necessary to accurately and qualitatively analyze all the phases in the sample. This is difficult to achieve in real mineral samples. The composition of natural minerals is very complex, and low-content phase diffraction The...

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Abstract

The invention provides a method for determining the phase content in iron ore, and belongs to the technical field of ore determination methods, and the method comprises the following steps: 1, preparing a standard sample; step 2, performing elemental composition determination on the standard sample, and calculating a mass absorption coefficient of the standard sample; then determining a phase spectrogram of the standard sample; drawing a working curve by taking the mass fraction of the to-be-measured phase as a horizontal coordinate and selecting the product of the net intensity of the spectral line and the mass absorption coefficient of the sample as a vertical coordinate, and fitting a linear equation; 3, calculating the mass absorption coefficient of the sample, determining the phase spectrogram of the sample under the condition consistent with that of the standard sample, and then performing phase analysis on the sample spectrogram; and obtaining the phase content of the sample. According to the method for determining the content of the phases in the iron ore, a to-be-detected sample does not need to be labeled, the method is not influenced by the crystallinity of the sample, qualitative analysis on all the phases of the sample is not needed, and pure-phase reagents of all the to-be-detected phases do not need to be obtained.

Description

technical field [0001] The invention belongs to the technical field of ore determination methods, and more particularly relates to a method for determining the phase content in iron ore. Background technique [0002] A phase is a phase with a specific physical and chemical structure in a substance, and the same element can exist in different compound states in a substance. The accurate quantitative analysis of iron mineral phase content plays an important role in the quality evaluation and application guidance of iron ore. More than 170 kinds of iron-bearing minerals have been proven in the natural environment, but there are not many kinds of iron ore with industrial value. When evaluating the value of iron ore, we should not only pay attention to the content of iron element, but also the existence state and content of iron. These works are based on the quantitative analysis of the phase. The beneficiation and smelting processes of iron ore with different phase composition...

Claims

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Application Information

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IPC IPC(8): G01N23/207G01N23/223G01N21/73
CPCG01N23/207G01N23/223G01N21/73G01N2223/056G01N2223/076G01N2223/1016Y02P10/20
Inventor 乔柱王恒范广宇赵秀荣姜郁封亚辉郑建明
Owner 连云港海关综合技术中心
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