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Ion conditioning agent and application thereof in method for measuring content of fluorine in aluminum fluoride

A determination method and technology of a regulator, applied in the field of aluminum smelting, can solve the problem that the fluorine content of aluminum fluoride cannot be measured accurately and quickly, and achieve the effects of shortening sample processing time, low operating cost and safe operation.

Inactive Publication Date: 2017-09-22
GANSU DONGXING ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ion regulator and its application in the determination method of fluorine content in aluminum fluoride, so as to solve the problem that the fluorine content in aluminum fluoride cannot be determined accurately and quickly at present

Method used

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  • Ion conditioning agent and application thereof in method for measuring content of fluorine in aluminum fluoride
  • Ion conditioning agent and application thereof in method for measuring content of fluorine in aluminum fluoride
  • Ion conditioning agent and application thereof in method for measuring content of fluorine in aluminum fluoride

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1: (this embodiment is the best embodiment)

[0040] Ionic Regulator Preparation:

[0041] Accurately weigh 58.0g of sodium chloride and 270.0g of sodium citrate, add 60ml of glacial acetic acid to the mixture, dissolve and set the volume in a 1000ml volumetric flask to make an ion regulator;

[0042] Step 1. Sample solution preparation:

[0043] Accurately weigh 0.2000g of an aluminum fluoride sample dried at 120°C, add 1.5g of sodium hydroxide, put it into a 30ml platinum crucible, add 0.1ml of water dropwise, melt at 200°C for 2 hours, take it out and cool it, dilute with water to volume to 250ml, transferred to a 250ml polyvinyl chloride volumetric flask to make a sample solution;

[0044] Step 2, standard solution preparation:

[0045] After drying the aluminum fluoride standard samples with fluorine content of 54.07%, 57.72%, 60.88%, and 64.97% at 120°C, respectively, accurately weigh 0.2000g of aluminum fluoride standard samples, add 1.5g of sodium ...

Embodiment 2

[0056] Ionic Regulator Preparation:

[0057] Accurately weigh 58.0g of sodium chloride and 270.0g of sodium citrate, add 60ml of glacial acetic acid to the mixture, dissolve and set the volume in a 1000ml volumetric flask to make an ion regulator;

[0058]Step 1. Sample solution preparation:

[0059] Accurately weigh 0.2000g of aluminum fluoride that has been dried at 120°C, add 2.0g of sodium hydroxide, put it into a 30ml platinum crucible, add 0.2ml of water dropwise, melt at 150°C for 2.5h, take it out and cool it, dilute with water to 250ml, transferred to a 250ml polyvinyl chloride volumetric flask to make a sample solution with a fluorine content of 0.543mg / ml;

[0060] Step 2, standard solution preparation:

[0061] After drying the aluminum fluoride standard samples with fluorine content of 54.07%, 57.72%, 60.88%, and 64.97% at 120°C, respectively, accurately weigh 0.2000g of aluminum fluoride standard samples, add 2.0g of sodium hydroxide, and put Add 0.2ml of wate...

Embodiment 3

[0072] Ionic Regulator Preparation:

[0073] Accurately weigh 58.0g of sodium chloride and 270.0g of sodium citrate, add 60ml of glacial acetic acid to the mixture, dissolve and set the volume in a 1000ml volumetric flask to make an ion regulator;

[0074] Step 1. Sample solution preparation:

[0075] Accurately weigh 0.2000g of aluminum fluoride dried at 120°C, add 1.0g of sodium hydroxide, put it into a 30ml platinum crucible, add 0.1ml of water dropwise, melt at 300°C for 1.5h, take it out and cool, dilute with water to 250ml, transferred to a 250ml polyvinyl chloride volumetric flask to make a sample solution with a fluorine content of 0.543mg / ml;

[0076] Step 2, standard solution preparation:

[0077] After drying the aluminum fluoride standard samples with fluorine content of 54.07%, 57.72%, 60.88%, and 64.97% at 120°C, respectively, accurately weigh 0.2000g of aluminum fluoride standard samples, add 1.0g of sodium hydroxide, and put Add 0.1ml of water dropwise to a ...

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Abstract

The invention discloses an ion conditioning agent and application thereof in a method for measuring the content of fluorine in aluminum fluoride, and belongs to the technical field of aluminum smelting. The problems that the content of fluorine in aluminum fluoride cannot be accurately and rapidly measured in the prior art are solved. The method comprises the steps of sample solution preparation, standard solution preparation, ion conditioning agent preparation, curve plotting, sample concentration measuring and calculation of the content of fluoride in the solution. The novel ion conditioning agent is built, the pH value of the detected solution is adjusted to 5-6, the detection conditions of a fluoride ion selective electrode reach the optimum, and the solution is close to the existing form of fluorine and sodium; the sample processing time is shortened, and the fluoride content is rapidly and accurately measured; a small amount of analytical reagent is adopted, and the analytic cost is low; the technological process is non-toxic, and operation is safe; the operation cost is low, analysis is rapid, and manpower is saved.

Description

technical field [0001] The invention belongs to the technical field of aluminum smelting, and in particular relates to an ion regulator and its application in a method for determining the fluorine content in aluminum fluoride. Background technique [0002] In the process of producing aluminum ingots for remelting, cryolite-alumina electrolysis is mainly used to produce metal aluminum. In normal production, a certain amount of fluoride salt must be continuously added as a flux for electrolytic alumina, and the index of fluorine in fluoride salt Most importantly, photoelectric direct reading spectrometers, X-ray diffractometers, ICP and other equipment are currently used in inspection and detection analysis, and there is a lack of corresponding supporting equipment in the analysis of the main raw materials aluminum fluoride and cryolite main element fluorine, and the analysis cycle For a long time, quality control often appears as an after-the-fact management pattern. Conten...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 杨建伟张竸文吕芳霞杨怀安何光俊
Owner GANSU DONGXING ALUMINUM
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