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Standard sample for aluminium electrolyte analysis

A technology for electrolyte analysis and standard samples, applied in the field of standard samples for industrial aluminum electrolyte analysis, to achieve the effect of providing accurate and reliable and improving control level

Inactive Publication Date: 2004-11-17
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no record of standard samples for aluminum electrolyte analysis applied to instruments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The calcium-containing series Na 3 AlF 6 -AlF 3 -CaF 2 -Al 2 o 3 The molecular ratio of a series of aluminum electrolyte samples varies stepwise between 2.00 and 3.00, in which Al 2 O is a fixed content of 3%, when the molecular ratio is 2.20, Al 2 O is 3%, CaF 2 is 2%; when the molecular ratio is 2.50, Al 2 O is 3%, CaF 2 is 4.5%; when the molecular ratio is 2.85, Al 2 O is 3%, CaF 2 6.25%.

Embodiment 2

[0014] The calcium-containing magnesium-lithium series Na 3 AlF 6 -AlF 3 -CaF 2 -MgF 2 -LiF-Al 2 o 3 The molecular ratio of the standard sample for the analysis of the aluminum electrolyte in the system changes stepwise between 2.00 and 3.00, in which Al 2 O is a fixed content of 3%, CaF 2 The content is 2%-11%, MgF 2 The content of LiF is 1.5%-6.0%, and the content of LiF is 0.25%-1.45%; when the molecular ratio is 2.20, Al 2 O is 3.0%, CaF 2 3.0%, MgF 2 is 2.00%, LiF is 0.35%; when the molecular ratio is 2.50, Al 2 O is 3%, CaF 2 6.00%, MgF 2 is 3.50%, LiF is 0.65%; when the molecular ratio is 2.85, Al 2 O is 3%, CaF 2 9.50%, MgF 2 5.25% for LiF and 1.15% for LiF.

[0015] Through all-element analysis, chemical analysis and a variety of effective value-setting methods to determine the value, a standard sample for aluminum electrolyte analysis with step data and meeting the requirements of instrument analysis is formed.

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Abstract

The invention refers to a kind of media in process of manufacturing aluminum electrolyzation, especially refers to a kind of standard sample in industrial aluminum electrolyzation analysis. The technology project of the invention is: the industrial aluminum electrolyzation analysis sample uses low molecular ratio industrial cryolite as base, adds in sodium fluoride, aluminum fluoride, calcium fluoride, magnesium fluoride, lithium fluoride, aluminum oxide; the cryolite 80%, aluminum fluoride 6-12%, aluminum oxide 3-5%; the additives calcium fluoride, magnesium fluoride, lithium fluoride 5-7%. The analysis is simple and convenient, low cost, quick, provides accurate and reliable control data for aluminum electrolyzation effectively, and upgrades the aluminum electrolyzation process level.

Description

technical field [0001] The invention relates to a medium in the production process of aluminum electrolysis, in particular to a standard sample for industrial aluminum electrolyte analysis. Background technique [0002] Aluminum electrolyte is a medium in the process of aluminum electrolysis production process, not a product. There is no corresponding analysis and testing standard in the country or industry, and there is no national or industry-level reference material. At present, major domestic aluminum electrolysis factories use fluoride ion selective electrode method, conductivity method, thermal titration method, X-ray diffraction analysis method and polarizing microscope method to analyze and determine the molecular ratio of aluminum electrolyte. The standard samples they use are Internal control standard sample, the use effect is not ideal. Due to the inconsistency of the methods and the lack of standard samples for calibration, the analysis results are inevitably i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20
Inventor 李宗利郭水清司建宏王振丰耿昭高峰王广稳余端平刘永康朱燕明戴达勇苟小海肖国华王世学
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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