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Method for measuring microelement in sodium aluminate solution

A technology of medium and trace elements and sodium aluminate, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problems of cumbersome operation, long analysis period, high salt in industrial sodium aluminate solution, etc., to achieve reliable analysis data and improve analysis speed effect

Inactive Publication Date: 2010-05-19
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary

Problems solved by technology

To take a sample, 24 different analyzes need to be carried out, using many types of reagent materials and equipment, the analysis period is long and the operation is cumbersome, and the detection of some elements uses a large amount of organic reagents, which not only affects the timeliness and accuracy of the analysis, but also restricts the The progress of scientific research and production work, while causing certain damage to the physical and mental health of employees and the working environment
[0004] Industrial sodium aluminate solution has the characteristics of high salt, high alkali, high viscosity, and complex composition and structure. It is impossible to achieve continuous, rapid and efficient determination of various trace elements in it with existing analytical methods.

Method used

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  • Method for measuring microelement in sodium aluminate solution
  • Method for measuring microelement in sodium aluminate solution
  • Method for measuring microelement in sodium aluminate solution

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Experimental program
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preparation example Construction

[0032] 4.1 Preparation of analytical solution

[0033] Pipette 2.00 mL of the obtained sample solution (3) into a 100 mL volumetric flask while hot, add 6 mL of hydrochloric acid (1.1) to acidify until the precipitate is completely dissolved, add 10 mL of hydrochloric acid to the sample that has not completely dissolved the precipitate and heat it in a water bath until it is completely dissolved, dilute to the mark and mix well.

[0034] 4.2 Measurement times

[0035] Two determinations were carried out independently, and the average value was taken.

[0036] 4.3 Blank test

[0037] Do a blank test with the sample.

[0038] 4.4 Draw the working curve:

[0039] Pipette 0, 5.00mL, 10.00mL, 15.00mL, 50.00mL standard solutions into a set of 100mL volumetric flasks, respectively add 1.00mL aluminum matrix solution (1.4), dilute to the mark with water, and mix well.

[0040] 4.5 Measurements.

[0041] According to the different detection equipment used, select the best working...

Embodiment 1

[0060] (1) Pipette 2.00 mL of the obtained sodium aluminate solution into a 100 mL volumetric flask while it is hot, add 6 mL of hydrochloric acid (1+1) to acidify until the precipitate is completely dissolved, and add 10 mL of hydrochloric acid (1+1) to the sample that is not completely dissolved. ) and heated in a water bath until completely dissolved, diluted to the mark, and mixed.

[0061] (2) Draw the working curve: pipette 0, 5.00mL, 10.00mL, 15.00mL, 50.00mL standard solutions into a set of 100mL volumetric flasks respectively, add 1.00mL aluminum matrix solution (1.4), dilute to the mark with water, mix uniform.

[0062] (3) Sample measurement: introduce the standard series solution and the sample solution into the plasma respectively, and measure the line intensity of each element in the working curve solution and each element in the sample solution from low to high under the optimal working conditions of the selected instrument Analyze the strength of the line.

...

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Abstract

The invention provides a method for measuring microelement in sodium aluminate solution, relating to a continuous fast analysis method for measuring the microelement in the sodium aluminate solution when producing aluminum oxide. The method is characterized in that an inductively coupled plasma atomic emission spectrometer is used for measuring the content of the element in the sodium aluminate solution when measuring. The method comprises the steps of: leading industrial sodium aluminate solution and acid to have neutralization reaction according the characteristic of the industrial sodium aluminate solution; diluting and confirming volume according to the different concentrations of the solution to prepare sample solution which is suitable for the requirement of measurement; selecting a best analysis spectral line; fast measuring the content of the 24 microelements in the sodium aluminate solution with the inductively coupled plasma atomic emission spectrometer; and computing to obtain exact analysis data. The method improves the analysis speed for measuring the microelements in the sodium aluminate solution, and provides immediate, exact and reliable analysis data for the production of the aluminum oxide and the improvement of the technology.

Description

technical field [0001] A method for determining trace elements in sodium aluminate solution relates to a continuous and rapid analysis method for various trace elements in sodium aluminate solution in the alumina production process. Background technique [0002] The essence of the production of alumina by alkaline method is to react the alumina in bauxite with alkali to make sodium aluminate solution, then decompose sodium aluminate to obtain aluminum hydroxide, and obtain alumina product through roasting. The whole production has a direct relationship with the sodium aluminate solution. Therefore, an in-depth understanding of the chemical properties of the sodium aluminate solution is helpful for controlling changes in the production process, understanding the enrichment and loss of various trace elements in different links, and improving the production process. And operating conditions, improving technical and economic indicators and economic effects, and extracting valuab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
Inventor 梁倩董良白鹏程校艳玲艾蓁
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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