Sensitive, reliable, rapid and stable synchronous detection method for iron ore multi-elements

A simultaneous detection and iron ore technology, applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problem of accuracy of detection results, unsatisfactory reproducibility, narrow detection range of atomic absorption spectrometry, The analysis results have a relatively large impact, and achieve the effects of reducing volatile emissions and impurity pollution, high sex-to-background ratio, and rich spectral lines

Active Publication Date: 2014-04-02
WUKUN STEEL
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  • Description
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  • Application Information

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Problems solved by technology

At present, the commonly used iron ore element detection methods mainly include photometry, atomic absorption spectrometry and X-ray fluorescence spectrometry, among which photometry is complicated to operate, requires a lot of reagents, and the stability of the measurement results is slightly poor; the detection range of atomic absorption spectrometry is narrow. , it is not suitable for large-scale multi-element detection and analysis; although X-ray fluorescence spectroscopy overcomes the shortcomings of long analysis period and time-consuming and labor-intensive methods, due to the use of tablet method for sample preparation, the analysis results are greatly affected by the matrix, resulting in inaccurate detection results unsatisfactory reproducibility

Method used

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  • Sensitive, reliable, rapid and stable synchronous detection method for iron ore multi-elements
  • Sensitive, reliable, rapid and stable synchronous detection method for iron ore multi-elements
  • Sensitive, reliable, rapid and stable synchronous detection method for iron ore multi-elements

Examples

Experimental program
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Effect test

Embodiment 1

[0043] ——Detection of arsenic iron ore YSBC14721-98

[0044] A. Sample preparation: put 0.15g of the powder of arsenic-containing iron ore YSBC14721-98 to be tested into a polytetrafluoroethylene beaker, add a mixed acid of hydrochloric acid and nitric acid with a volume ratio of 4:1 according to the dosage of 225ml / g, and dissolve the sample Dissolve to obtain solution a; add hydrofluoric acid to solution a according to the dosage of 9ml / ml, heat at 225°C for 12min to obtain solution b; add perchloric acid to solution b according to the dosage of 5ml / ml , heated at 225°C until smoking, 1ml of the solution remained, and the solution c was obtained after cooling; according to the dosage of 12ml / ml, dilute hydrochloric acid mixed with hydrochloric acid and water at a volume ratio of 1:1 was added to the solution c to dissolve After filtering, dilute the filtrate with water to 0.001g / ml to obtain the test solution d.

[0045] B. Calibration: Set the working conditions of the ind...

Embodiment 2

[0056] ——Detection of vanadium-titanium magnetite concentrate YSBC19717-2005

[0057] A, sample preparation: 0.1g of the powder of the vanadium-titanium magnetite concentrate YSBC19717-2005 to be tested is placed in a polytetrafluoroethylene beaker, and a mixed acid of hydrochloric acid and nitric acid with a volume ratio of 5:1 is added according to the consumption of 200ml / g. Dissolve the sample to obtain solution a; add hydrofluoric acid to solution a according to the dosage of 7ml / ml, heat at 250°C for 10 minutes to obtain solution b; add perchloric acid to solution b according to the dosage of 4ml / ml Acid, heated at 250°C until smoking, 0.8ml of solution remains, and after cooling, solution c is obtained; according to the dosage of 10ml / ml, add dilute hydrochloric acid mixed with hydrochloric acid and water at a volume ratio of 1:1.2 to solution c , filtered after dissolving, and dilute the filtrate to 0.0008g / ml with water to obtain the test solution d.

[0058] B. Cali...

Embodiment 3

[0069] ——Detection of iron ore YSBC13710-95

[0070] A. Sample preparation: put 0.2g of the powder of iron ore YSBC13710-95 to be tested into a polytetrafluoroethylene beaker, add a mixed acid of hydrochloric acid and nitric acid with a volume ratio of 3:1 according to the dosage of 250ml / g, and dissolve the sample , to obtain the solution a; add hydrofluoric acid to the solution a according to the dosage of 12ml / ml, and heat at 200°C for 15min to obtain the solution b; add perchloric acid to the solution b according to the dosage of 6ml / ml, Heating at 200°C until smoking, 1.2ml of the solution remains, and after cooling, the solution c is obtained; add dilute hydrochloric acid mixed with hydrochloric acid and water at a volume ratio of 1:0.8 to the solution c according to the dosage of 15ml / ml, and dissolve After filtering, dilute the filtrate with water to 0.0012g / ml to obtain the test solution d.

[0071] B. Calibration: Set the working conditions of the inductively couple...

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Abstract

The invention discloses a sensitive, reliable, rapid and stable synchronous detection method for iron ore multi-elements, and belongs to the technical field of test and analysis of metallurgy materials. The method comprises the following steps: adding 0.1-0.2g of iron ore powder to 200-250ml/g mixed acid of hydrochloric acid and nitric acid with the ratio of (3-5):1 to dissolve; adding 7-12ml/ml hydrofluoric acid, and heating at 200-250 DEG C for 10-15 minutes; adding 4-6ml/ml perchloric acid, heating at 200-250 DEG C until the residual solution is 0.8-1.2ml; adding 10-15ml/ml diluted hydrochloric acid; and filtering after dissolving, and diluting into 0.0008-0.0012g/ml to obtain a solution to be detected. Standard solutions of the elements with different concentration gradients are prepared, an analytical spectral line and a working condition of each element in an inductively coupled plasma emission spectrum are selected, the emission intensity of the analytical spectral line of each element is determined to draw a standard curve, the emission intensity corresponding to each element is detected, and the content of each element is determined according to the standard curve. The method is sensitive, reliable, rapid and stable, analysis data can be timely provided for the smelting production process, the production efficiency and the utilization ratio of equipment are improved, and the application promotion value is relatively high.

Description

technical field [0001] The invention belongs to the technical field of metallurgical material testing and analysis, and in particular relates to a sensitive, reliable, fast and stable iron ore multi-element synchronous detection method. Background technique [0002] In order to effectively control the composition of the charge during iron ore smelting, quantitative analysis of the elemental composition in iron ore is required. At present, the commonly used iron ore element detection methods mainly include photometry, atomic absorption spectrometry and X-ray fluorescence spectrometry, etc. Among them, photometry is complicated to operate, requires a lot of reagents, and the stability of the measurement results is slightly poor; atomic absorption spectrometry has a narrow detection range. , it is not suitable for large-scale multi-element detection and analysis; although X-ray fluorescence spectroscopy overcomes the shortcomings of long analysis period and time-consuming and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N1/28
Inventor 李竞春赵征宇马林泽李洁严海陈燕燕万林白乘舟
Owner WUKUN STEEL
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