Method for judging reduced sample preparation uniformity of solid powder

A technology of solid powder and uniformity, which is applied in the field of solid powder shrinkage sample preparation, and can solve problems such as experimental errors and uneven sampling

Active Publication Date: 2015-02-18
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is a possibility of uneven sampling regardless of manual or mechanical mixing and division, resulting in experimental errors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Add 1 kg of a solid powder sample with a non-magnetic particle size of 47-74 microns and 1 kg of small iron balls with a particle size of 500 microns to the EPS-1 / 8 crushing and splitting joint sample making machine, mix for 15-20 minutes and then shrink and split , the reduction ratio is 1 / 32, the iron ball in the prepared sample is sucked out with a magnet, the weighing is 31.4g, the reduction ratio of the iron ball is 1 / 31.8, and the ratio of the two reduction ratios is: 32 / 31.8 = 0.99, in the range of 0.97-1.03, so this time the reduction sample preparation is relatively uniform.

example 2

[0023] Add 1 kg of a solid powder sample with a magnetic particle size of 47-74 microns and 500 g of agate balls with a particle size of 2000 microns to the EPS-1 / 8 combined crushing and shrinking sample preparation machine, and shrink and divide after mixing for 15-20 minutes. The reduction ratio is 1 / 32, and the prepared sample is sieved out the agate ball with 10 mesh Taylor sieves, weighing 15.6g, the reduction ratio of the agate ball is 1 / 32.1, and the ratio of the two reduction ratios is: 32 / 32.1=1.00, which belongs to the range of 0.97-1.03, so the sample preparation is more uniform this time.

example 3

[0025] Add 1 kg of a solid powder sample with a magnetic particle size of 165-350 microns and 500 g of hard alloy balls (non-magnetic) with a particle size of 20 mm in the EPS-1 / 8 crushing and shrinkage joint sample preparation machine, and mix for 15- After 20 minutes, the shrinkage was carried out, and the shrinkage ratio was 1 / 16. The prepared sample was sieved with a 2.5-mesh Taylor sieve to sieve out the alloy ball, and the weighing weight was 31.4g. The ratio is: 16 / 15.92=1.01, which belongs to the range of 0.97-1.03, so the reduction sample preparation is relatively uniform this time.

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PUM

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Abstract

The invention provides a method for judging reduced sample preparation uniformity of solid powder. The method comprises the steps of adding a preset quantity of detection balls with even sizes into a sample in a reduced sample preparation process; reducing according to the set reduction ratio; separating out the detection balls and a final sample from the reduced sample; and comparing the reduction ratio of the detection balls with the set reduction ratio, so as to judge the reduced sample preparation uniformity, wherein the grain diameter ratio of the detection balls to the sample is (10 to 1) to (100 to 1), and the mass ratio of the adding quantity of the detection ball to the sample is (1 to 1) to (1 to 10). By adopting the method disclosed by the invention, the uniformity of the reduced sample can be simply and rapidly judged.

Description

technical field [0001] The invention relates to the technical field of solid powder fractionation sample preparation, and more specifically, relates to a method for characterizing the uniformity of solid powder fractionation sample preparation. Background technique [0002] Solid powder sample preparation refers to the process of using crushing, drying, mixing, shrinking, sieving and other procedures to obtain samples whose physical and chemical properties are consistent with the original samples. Among them, mixing and dividing are the key to whether the sample preparation process is uniform and representative, and play an important role in the inspection error. Mixing is the process of artificially making the sample as uniform as possible to reduce the error in the next process; shrinking is to divide the mixed sample into several representative parts, and take one or several parts as the sample The process of testing samples. [0003] At present, manual or mechanical me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00G01N1/28G01N1/38
Inventor 付晓林龙军
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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