Method for rapid measuring aluminum oxide abrasion index

A wear index, rapid determination technology, applied in the direction of testing wear resistance, measuring device, particle size analysis, etc., can solve the problems of clogging of the test sieve, large dust, spending a lot of time cleaning, etc., to achieve a high degree of automation, eliminate system errors , the effect of improving work efficiency

Inactive Publication Date: 2008-01-23
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary

Problems solved by technology

This method is suitable for samples with a percentage content of -45μm particle size not greater than 20.0%. For samples with a subdivision content greater than 20.0%, it is easy to cause the test sieve to be blocked, and the test method takes a long time and has a large amount of dust, w

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0011] Using the Helos / BF dry and wet particle size analyzer of Germany Sympatec company, dry test; test conditions: gas dispersion pressure 100kPa, feeding funnel lifting height 2.5mm, feeding speed (vibration tank vibration rate between 0-100 Selected between %) 75%, the test sample volume is about 10 grams, and the temperature and humidity meet the requirements. The test results are reproducible and can fully meet the requirements of industrial alumina production control analysis. The specific steps are:

[0012] (1) Accurately weigh sample M 1 (50.00±0.10g, accurate to 0.01g), put it into the wear index tester, blow with a certain airflow cycle for 15 minutes, collect the sample, and weigh it. 2 .

[0013] (2) Calculate the sample M lost after wear 3 (M 3 =M 1 -M 2 ). The sample lost after abrasion is the sample that the airflow circulates and enters the dust collection bag. Tests prove that the particle size of this part of the sample is less than 45μm.

[0014] (3) To M 2 Jo...

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PUM

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Abstract

The invention relates to a method for rapidly measuring the wear index of alumina, which is characterized in that a laser hondrometer is used to replace a grading way for measuring the grain size distribution; first the contents in percentage of grades are measured for the sample before wearing; then a wear index tester is used to wear the sample, the worn sample is collected, the fine powder lost during wearing is collected by a dust-collecting bag, the fine powder collected by the dust-collecting bag is used to sample the worn sample, which are mixed evenly, then the contents in percentage of grades are measured by a laser way; the wear index of the sample is calculated by the contents in percentage of grades before and after the wearing. The method measures the grain size distribution before and after wearing by a highly automatic laser hondrometer, reduces the influence of any artificial factors on the test results e.g. collecting specimen, weighing and choking test sieve, etc. for a mechanical sieving method; and for the method here, the working efficiency is greatly improved because it is not necessary to take a long time for cleaning and drying the test sieves.

Description

Technical field [0001] A method for quickly determining the abrasion index of alumina relates to a method for determining the abrasion performance of alumina. Background technique [0002] The wear index is one of the important parameters to characterize sandy alumina, and it is an index to measure the strength of sandy alumina. The non-ferrous industry standard YS / T438.2-2001 "Method for the determination of physical properties of sandy alumina-Determination of wear index" uses the sieving method, that is, two samples of alumina to be tested are weighed, and one sample is directly sieved Determine the percentage content of -45μm particle size; another sample is collected in a fluidized bed with a certain airflow circulation for 15 minutes, and then sieved to determine the percentage content of its -45μm particle size, according to the sample wear Before and after the change of the percentage content of the particle size less than (or greater than) 45μm, the wear index of the sam...

Claims

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Application Information

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IPC IPC(8): G01N3/56G01N15/02
Inventor 赵春芳张树朝褚丙武
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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