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: 2011-06-15
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 parent body, mix 1%, 10%, and 50% iron oxide scale into it respectively, mix them thoroughly, and put them in a grinder to grind until they all pass 200 Mesh screen, dried at 105℃ for use.
[0067] X-ray diffraction comparison study results: X-ray diffraction spectrum shows that when more than 1% iron oxide scale is mixed in iron ore, there are hematite, magnetite, ferrous oxide, and pure iron peaks, which are in line with the characteristic peaks of iron oxide scale. , But when iron ore is mixed with 1%-10% iron oxide scale, the characteristic peak is not obvious and does not appear as a full spectrum peak. Only when the mixing ratio is greater than or equal to 10% can the full spectrum peak appear and the peak value is significant. Therefore, an accurate judgment can be made for iron ore mixed with more than 10% iron oxide scale, and other methods are needed to assist confirmation for iron ore mi...
Embodiment 2
[0077] Example 2: Identification of doped iron oxide scale in imported iron ore
[0078] The sample is dried first, then prepared, and passed 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 the sample is judged to be iron oxide scale or iron There is oxide scale in the mine, such as Figure 7 .
[0080] Analysis by scanning electron microscope: Observing the sample under a scanning electron microscope, it can be seen that there are particles with characteristics of iron ore 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 determined 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 suitable for the inspection and quarantine system, customs, scientific research units, universities, inspection centers and manufacturers to identify iron ore and iron oxide scale. Background technique [0002] Iron ore refers to iron-bearing minerals, which can be used to extract 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 on the steel surface. [0003] Since the reform and opening up, China's economy has developed rapidly, and steel demand has increased year by year. With the rapid development of the steel industry, my country's iron ore output is far from meeting the needs of the steel industry. Imported iron ore has become o...
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Patent Type & Authority Applications(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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