Method for measuring and calculating all iron content in imported iron ore

A technology of iron content and calculation method, applied in the direction of measuring device, preparation of test samples, color/spectral characteristic measurement, etc., can solve problems affecting the speed of certificate issuance and unfavorable development of iron ore trade

Active Publication Date: 2010-06-02
CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

At present, the lack of inspection resources has seriously affected the speed of ...

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  • Method for measuring and calculating all iron content in imported iron ore
  • Method for measuring and calculating all iron content in imported iron ore
  • Method for measuring and calculating all iron content in imported iron ore

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Embodiment

[0068] Example: For iron ore samples imported from Australia, India, Brazil and South Africa, the steps are as follows:

[0069] (1) According to the standard GB / T6730-86 "Methods for Chemical Analysis of Iron Ore", the samples are prepared for analysis, the samples are thoroughly mixed and dried at 105°C, and placed in a desiccator to cool to room temperature for later use.

[0070] (2) Weigh about 1.0g sample in a platinum dish, put it in a muffle furnace, slowly raise the temperature to 1000℃, burn to constant weight, take it out and put it in a desiccator to cool to room temperature, weigh it, Calculate the sample ignition loss LOI according to formula (6).

[0071] LOI=(m 1 +m 2 -m 3 )×100 / m 2 …………………………………(6)

[0072] Where: m 1 -The weight of the platinum dish

[0073] m 2 -The weight of the sample

[0074] m 3 -The weight of the sample and platinum dish after ignition

[0075] LOI-Ignition reduction.

[0076] (3) According to the standard ISO9516-1 "Iron Ore-X-Ray Fluorescence Spe...

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Abstract

The invention relates to a method for measuring and calculating all iron content in imported iron ore. The steps are as follows: 1. preparing a sample into an analytical sample according to the standard; 2. firing and weighing the analytical sample to obtain the sample firing decrement LOI; 3. fusing the sample with the firing decrement tested according to the standard to prepare a test sample; 4. placing the prepared test sample into an X-ray fluorescence spectrometer to test the content of each element to be tested, and storing the data into the test software database of the X-ray fluorescence spectrometer; 5. using an infrared carbon and sulfur tester to test the content of S in the analytical sample; 6. working out the computational formula on TFe={100%-(SiO2+Al2O3+CaO+1.2912*Mn+MgO+2.2914*P+Na2O+K2O+2.4971*S+TiO2)*(1-LOI)%}*0.6994 in Excel; and 7. substituting the firing decrement and content of each element into the computational formula to automatically calculate the all iron content TFe in the sample to be tested. The application of the calculating method can solve most of all iron measurement problems, thus exerting tremendous effect in practical test work, greatly shortening workflow, improving working efficiency, ensuring license authorizing efficiency, and satisfying the requirements of test work under the condition that iron ore import increase rapidly.

Description

Technical field [0001] The invention relates to a method for determining iron ore, in particular to a method for determining the total iron content of imported iron ore in inspection and quarantine systems, scientific research units, colleges and universities, testing centers and corresponding production plants. Background technique [0002] As the main raw material for steel production, iron ore occupies an important position in the national economy. As the world's largest iron and steel producer, my country consumed 460 million tons of iron ore in 2004, of which 208 million tons are dependent on imports, and the dependence on imports exceeds 50%. For imported iron ore, the important basis for trade settlement is the total iron content and its silicon, aluminum, phosphorus, sulfur and other impurity elements. The trade contract stipulates that the total iron content is based on the average of the results of the unloading port and the loading port. The value is issued or calcula...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/28G01N23/223G01N21/35
Inventor 魏红兵谷松海宋义冯宇新马德起潘宏伟魏伟
Owner CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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