A kind of synthetic method of the electrolyte sample that is used for sodium expansion rate test

Abstract

The invention relates to a method for synthesizing an electrolyte sample used for sodium expansion rate testing, comprising: firstly mixing cryolite, sodium fluoride, calcium fluoride and alumina according to a certain ratio, then mixing the mixture and pouring it into graphite Heat the crucible to the melting temperature and keep it warm for a certain period of time, stirring constantly to make the bubbles escape. Then use a suitable sampling tool to scoop out the melt and cool it down to form an electrolyte sample block. The sample block is roughly crushed to less than 3mm with a jaw crusher, and the sample is divided into two parts: one part is crushed with a pair of rollers Machine crushed to about 1mm-2mm, one part of the sample ground by a sample mill completely passed through the 0.075mm test sieve, and the two parts of the sample were mixed in a certain proportion to obtain an electrolyte sample that meets the determination of the sodium expansion rate. The invention uses melting and particle size mixing to prepare electrolyte samples for the sodium expansion rate test, and the final electrolyte reagent can replace imports, is more economical and applicable, and can meet the preparation requirements of crucibles of different sizes.

Description

technical field [0001] The invention belongs to the technical field of electrolyzers, and in particular relates to a method for preparing electrolyte samples for sodium expansion rate testing by means of melting and particle size mixing. Background technique [0002] The sodium expansion rate index of the cathode is an important index to measure whether the electrolytic cell can withstand electrolyte erosion. At present, there are many problems in the test of this index. First, the cost of the test is high. The graphite crucible, thermocouple, and electrolyte reagents are all disposable. Consumables, the cost of doing a test is relatively high; secondly, the electrolyte reagents required for the test are currently purchased abroad, each reagent needs more than 2,000 yuan, and only one sample can be tested. However, if a self-prepared electrolyte reagent is used for the test, the molecular ratio and content of the overall electrolyte vary greatly. In addition, due to the smal...

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Problems solved by technology

[0002] The sodium expansion rate index of the cathode is an important index to measure whether the electrolytic cell can withstand electrolyte erosion. At present, there are many problems in the test of this index. First, the cost of the test is high. The graphite crucible, thermocouple, and electrolyte reagents are all disposable. Consumables, the cost of doing a test is relatively high; secondly, the electrolyte reagents required for the test are currently purchased abroad, each reagent needs more than 2,000 yuan, and only one sample can be tested

However, if a self-prepared electrolyte reagent is used for the test, the molecular ratio and content of the overall electrolyte vary greatly. In addition, due to the small volume density, the electrolyte sample of the same quality cannot be loaded into the graphite crucible, so it can only be added less or the crucible The size is enlarged to solve it, which brings more uncertainty to the test results