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Method for measuring oxide, phosphorus, manganese and copper content of directly reduced iron

A technology for reducing iron and oxides, applied in the field of analysis and testing, can solve problems such as difficulty in measurement, and achieve the effects of shortening measurement time, reducing costs, and reducing pollution

Inactive Publication Date: 2011-08-17
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

X-ray fluorescence spectrometry is used for determination, although multiple elements can be determined in one melting sample, which saves time and effort, and does not need to consume a large amount of chemical reagents, which can reduce environmental pollution and protect the health of operators, but due to the difficulty of determination Therefore, there is no effective method to determine the content of silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, titanium dioxide, potassium oxide, phosphorus, manganese and copper in direct reduced iron.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0020] Preparation of silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, titanium dioxide, potassium oxide and standard samples of phosphorus, manganese and copper:

[0021] 1A. Weigh 1.0000 g of the 10 standard samples listed in Table 1, and burn them to constant weight at 900°C, and calculate the ignition increments 1 to 10# as -9.61%, -12.38%, -8.25%, - 8.96%, -6.59%, 1.49%, -4.62%, -2.82%, -1.21%, -9.65%, among them, the burning increment is calculated by the following formula:

[0022] X(%)=

[0023] In the formula: ——the mass of sample and magnetic crucible before burning, g;

[0024] — mass of sample and magnetic crucible after burning, g;

[0025] — mass of sample, g.

[0026] 1B. Weigh the mass of samples 1 to 10# after burning in step 1A to be 0.2712g, 0.2629g, 0.2752g, 0.2731g, 0.2802g, 0.3045g, 0.2861g, 0.2915g, 0.2964g, 0.2710g, and placed in 10 platinum crucibles respectively, the actual weighing W (g) = 0.3×(1+X / 100), that is, the qual...

Embodiment 2

[0034] Determination of silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, titanium dioxide, potassium oxide, phosphorus, manganese and copper in direct reduced iron samples to be tested:

[0035] 1. Preparation of the direct reduced iron sample to be tested:

[0036] 1A. Weigh 1.0000 g of the direct reduced iron sample to be tested, burn it to constant weight at 900°C, and calculate the ignition gain to be 35.04%, where the ignition gain is calculated by the following formula:

[0037] X(%)=

[0038] In the formula: ——the mass of sample and magnetic crucible before burning, g;

[0039] — mass of sample and magnetic crucible after burning, g;

[0040] - the mass of the sample, g;

[0041] 1B. Weigh 0.4051 g of the sample after burning in step 1A and place it in a platinum crucible. W (g)=0.3×(1+X / 100), that is, the quality of the direct reduced iron sample is controlled to 0.3000 g, where X is the ignition gain in step A X(%)=35.04%;

[0042] 1C. Acc...

Embodiment 3

[0049] Determination of silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, titanium dioxide, potassium oxide, phosphorus, manganese and copper in direct reduced iron samples to be tested:

[0050] 1. Preparation of direct reduced iron samples to be tested:

[0051] 1A. Weigh 1.0000 g of the direct reduced iron sample to be tested, burn it to constant weight at 1000°C, and calculate the ignition gain to be 35.04%. The burning gain is calculated by the following formula:

[0052] X(%)=

[0053] In the formula: ——the mass of sample and magnetic crucible before burning, g;

[0054] — mass of sample and magnetic crucible after burning, g;

[0055] — mass of sample, g.

[0056] 1B. Weigh 0.5402 g of the sample after burning in step 1A and place it in a platinum crucible. W (g)=0.4×(1+X / 100), that is, the quality of the direct reduced iron sample is controlled to 0.4000 g, where X is the ignition gain in step A X(%)=35.04%;

[0057] 1C. According to the amo...

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Abstract

The invention provides a method for measuring oxide, phosphorus, manganese and copper content of directly reduced iron. The method comprises the following steps of: measuring the X-ray fluorescent line strength of a test sample to be tested by using conventional X-ray fluorescent spectrometry, and obtaining corresponding oxide, phosphorus, manganese and copper content values in a standard working curve of oxide, phosphorus, manganese and copper according to the X-ray fluorescent line strength, wherein the test sample to be tested is obtained by firing, adding lithium tetraborate, lithium nitrate solution and ammonium iodide solution, mixing, drying, heating till melting and cooling. After the sample is melted at one time, the silicon dioxide, calcium oxide, magnesium oxide, aluminum sesquioxide, titanium dioxide, potassium oxide, phosphorus, manganese and copper content of the test sample can be directly measured; and the method is convenient for operation, has high measurement accuracy and good measurement result stability, reproducibility and accuracy, and can meet daily measurement. The prepared standard test sample and the test sample to be tested can be stored for a long term and reused, so the cost is reduced, the pollution is reduced, and the measurement time can be greatly shortened.

Description

[0001] technical field [0002] The invention relates to a method for determining the content of oxides, phosphorus, manganese and copper in direct reduced iron, especially a method for determining silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, titanium dioxide, potassium oxide and The invention discloses a method for determining the contents of phosphorus, manganese and copper, belonging to the technical field of analysis and testing. Background technique [0003] There is no quantitative analysis and determination method for the determination of silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, titanium dioxide, potassium oxide, phosphorus, manganese and copper in direct reduced iron. The contents of other materials such as silicon, calcium, magnesium, aluminum, titanium, potassium, phosphorus, manganese and copper in steel are mostly determined by atomic absorption spectrometry, spectrophotometry, gravimetric method and titration method. ...

Claims

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Application Information

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IPC IPC(8): G01N23/223
Inventor 陶俊李文生许涯平李玉清曾海梅陈涛
Owner WUKUN STEEL
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