Identification method for distinguishing iron ore from oxide scale
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A technology of iron oxide scale and iron ore, which is applied in the direction of material analysis using wave/particle radiation, material analysis, and material analysis using radiation diffraction. Achieve the effect of saving time, avoiding environmental pollution and ensuring border security
Active Publication Date: 2012-06-27
CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Since the main elements in iron oxide scale are similar to those of iron ore, it is impossible to distinguish them only from the content of each main element. At present, there is no effective identification method at home and abroad, which makes it difficult for customs and inspection and quarantine inspections. It is urgent to provide relevant information from a technical perspective. Theoretical basis, simple and effective identification method, strengthen iron ore inspection and supervision, actively participate in national macro-control, protect the legitimate interests of domestic enterprises and the environment from pollution
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Embodiment 1
[0066] Example 1: Sample composition: Select Indian iron ore (No. 1-37022) as the matrix, mix 1%, 10%, and 50% iron oxide scale into it, mix well, put it into a grinder and grind until all pass 200 Mesh sieve, dry at 105°C for later use.
[0067] X-ray diffraction comparative research results: X-ray diffraction spectrum shows that when iron ore is mixed with more than 1% iron oxide scale, there are hematite, magnetite, ferrous oxide, and pure iron peaks appearing, which are in line with the characteristic peaks of iron oxide scale , but when the iron ore is mixed with 1% to 10% iron oxide scale, the characteristic peaks are not obvious and the full spectrum peaks do not appear. Only when the incorporation ratio is greater than or equal to 10% can the full-spectrum peak appear and the peak be significant. Therefore, accurate judgment can be made for iron ores mixed with more than 10% iron oxide scale, and other methods are needed to assist in the confirmation of iron ores mixe...
Embodiment 2
[0077] Example 2: Identification of iron oxide scale doped in imported iron ore
[0078] The samples were first dried and then prepared to pass through a 200 mesh screen.
[0079] X-ray diffraction spectrum analysis: X-ray diffraction spectrum analysis of the selected samples found obvious hematite, magnetite, ferrous oxide, and pure iron peaks in the sample, so it was judged that the sample was iron oxide scale or iron The ore is mixed with iron oxide scale, such as Figure 7 .
[0080] Scanning electron microscope analysis: The sample is observed under a scanning electron microscope, and it can be seen that there are particles with iron ore characteristics and particles with obvious characteristics of iron oxide scale, such as Figure 8 .
[0081] Through X-ray diffraction and mineral phase microscope analysis, it can be judged that the sample contains iron oxide scale.
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Abstract
The invention relates to an identification method for distinguishing iron ore from oxide scale, which is used for identifying the attributes of the iron ore and the oxide scale by analyzing and comparing characteristic spectrum peaks of hematite, magnetite, ferrous oxide and pure iron by respectively adopting X-ray diffraction spectroscopy and scanning electron microscopy through X-ray diffraction spectrums and judging whether the hematite, magnetite, the ferrous oxide and the pure iron have obvious characteristics of oxide scale under an electron microscope. The identification method prevents import goods from passing through the Custom under another name in terms of the source, provides technical support for inspection and quarantine and for the Custom, provides scientific authentication reports for traders, guarantees border security, and avoids pollution to environment. The identification method discloses and establishes an identification process for the first time, standardizes the working method for identification, and is instructive for identifying the raw materials of all the imported wastes.
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 iron oxide scale. This method is applicable to the inspection and quarantine system, customs, scientific research units, colleges and universities, testing centers and manufacturers to identify iron ore and iron oxide scale. 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. Iron oxide scale is the product of high-temperature oxidation of the steel surface. [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 th...
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/20G01N23/00
Inventor 谷松海宋义魏红兵郭芬郑洪星付志强
Owner CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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