Method for distinguishing iron ore with sintered ore and return ore

A technology of sintering and returning ore, which is applied in the direction of material analysis by optical means, material analysis by wave/particle radiation, material analysis, etc., to achieve the effects of ensuring national border security, saving time, and avoiding environmental pollution

Inactive Publication Date: 2011-05-11
CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

At present, there are no effective identification methods at home and abroad, so that the customs and inspection and quarantine investigations cannot be relied upon. Therefore, it is urgent to provide theoretical basis and simple and effective identification methods from a technical point of view, strengthen iron ore inspection and supervision, and actively participate in national macro-control. Protect the legal interests of domestic enterprises and the environment from pollution

Method used

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  • Method for distinguishing iron ore with sintered ore and return ore
  • Method for distinguishing iron ore with sintered ore and return ore
  • Method for distinguishing iron ore with sintered ore and return ore

Examples

Experimental program
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Effect test

Embodiment 1

[0074] Example 1: Sample composition: select Brazilian iron ore (number: 1-22013) as the matrix, mix 1%, 10%, and 50% sintered ore and return ore into it, mix well, put it into a grinder and grind it to All passed through a 200-mesh sieve, and dried at 105°C for later use.

[0075] X-ray diffraction comparative study results:

[0076] a. The X-ray diffraction method cannot distinguish whether the iron ore is mixed with sintered ore or returned ore;

[0077] b. When more than 1% sintered ore is mixed into iron ore or the ore is returned, the spectral peak of calcium magnesium iron silicate appears, such as Figure 8 , Figure 9 , in line with the characteristic peaks of sintering ore and returning ore, but when iron ore is mixed with 1% to 10% sintering ore, the characteristic peak is not obvious and not the full spectrum peak appears when returning ore. Only when the incorporation ratio is greater than or equal to 10% can the full-spectrum peak appear and the peak be signif...

Embodiment 2

[0088] Example 2: Identification of imported iron ore doped with sinter and returned ore

[0089] The samples were first dried and then prepared to pass through a 200 mesh screen.

[0090] Using X-ray diffraction spectrum analysis: X-ray diffraction spectrum analysis of the selected samples found that there were obvious calcium-magnesium-iron-silicate peaks in the sample, so it was judged that the sample was sintered ore, returned ore or iron ore mixed with sintered ore or return mine, such as Figure 12 .

[0091] Scanning electron microscope analysis: The sample is observed under a scanning electron microscope, and it can be seen that there are particles with the characteristics of iron ore and particles with obvious characteristics of sintered ore, such as Figure 10 .

[0092] Through X-ray diffraction and mineral phase microscope analysis, it can be judged that the sample contains sintered ore.

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Abstract

The invention relates to a method for distinguishing iron ore with sintered ore and return ore. The X-ray diffraction spectroscopy and the scanning electron microscopy are adopted in the method, wherein the analysis comparison is performed to the spectrum peak of calcium magnesium iron silicate through X-ray diffraction spectrum, whether the remarkable characteristics of the sintered ore or the return ore exist or not is judged, and the attribute of the iron ore, the sintered ore and the return ore is distinguished gradually. The distinguishing method achieves the purpose of preventing the name of commodities in import cargoes from being changed from source, provides technical support for quarantines and customs, provides scientific survey report for traders, ensures border security and avoids environmental pollution. The distinguishing flow is provided and established for the first time, the working procedure of distinguishing is standardized, and the method is instructive in distinguishing all the imported waste raw materials.

Description

technical field [0001] The invention relates to an inspection method of iron ore, in particular to an identification method for distinguishing iron ore from sintered ore and returned ore. This method is suitable for the inspection and quarantine system, customs, scientific research units, colleges and universities, testing centers and manufacturers to identify iron ore, sintered ore and returned ore. Background technique [0002] Iron ore refers to iron-containing minerals, which can be used for refining elemental pig iron, steelmaking and many other purposes. It is the most basic and most demanded smelting raw material in the iron and steel industry. [0003] Since the reform and opening up, China's economy has developed rapidly, and the demand for iron and steel has increased year by year. With the rapid development of the iron and steel industry, my country's iron ore output is far from meeting the needs of the iron and steel industry. Imported iron ore has become one of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/207G01N21/84
Inventor 宋义谷松海郭芬郑洪星魏红兵赵江勇
Owner CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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