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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From May 3, 2017 to June 16, 2017
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to
Guideline:
other: ISO 2926:2005 Aluminium oxide used for the production of primary aluminium-Particle size analysis for the range 45 μm to 150 μm-Method using electroformed sieves
Type of method:
sieving
Percentile:
D50
Mean:
> 53 µm
St. dev.:
0.551
No.:
#1
Size:
> 500 µm
Distribution:
0.19 %
No.:
#2
Size:
>= 355 - <= 500 µm
Distribution:
0.89 %
No.:
#3
Size:
>= 250 - <= 355 µm
Distribution:
2.39 %
No.:
#4
Size:
>= 212 - <= 250 µm
Distribution:
4.14 %
No.:
#5
Size:
>= 180 - <= 212 µm
Distribution:
1.66 %
No.:
#6
Size:
>= 100 - <= 180 µm
Distribution:
8.31 %
No.:
#7
Size:
>= 53 - <= 100 µm
Distribution:
34.97 %
No.:
#8
Size:
< 53 µm
Distribution:
46.82 %

Table 1. Determination results of the Particle size

No.

1

2

Average value

Mass of the sample (m0), g

31.24

31.56

Mass of the residual on the sieve of 500μm, g

0.05

0.07

Mass fraction with more than 500 μm particle size, %

0.16

0.22

0.19

Mass of the residual on the sieve of 355 μm, g

0.27

0.29

Mass fraction with 355 μm - 500 μm particle size, %

0.86

0.92

0.89

Mass of the residual on the sieve of 250 μm, g

0.72

0.78

Mass fraction with 250 μm - 355 μm particle size, %

2.30

2.47

2.39

Mass of the residual on the sieve of 212 μm, g

1.28

1.32

Mass fraction with 212 μm - 250 μm particle size, %

4.10

4.18

4.14

Mass of the residual on the sieve of 180 μm, g

0.51

0.53

Mass fraction with 180 μm - 212 μm particle size, %

1.63

1.68

1.66

Mass of the residual on the sieve of 100 μm, g

2.60

2.62

Mass fraction with 100 μm - 180 μm particle size, %

8.32

8.30

8.31

Mass of the residual on the sieve of 53 μm, g

10.96

10.00

Mass fraction with 53 μm - 100 μm particle size, %

35.08

34.85

34.97

Mass of the portion on the bottom reciver, g

14.68

14.72

Mass fraction with less than 53 μm particle size, %

46.99

46.64

46.82

Sum of all masses, g

31.07

31.33

Relative difference (absolute value) between the sum and the mass of the sample taken, %

0.54

0.73

Conclusions:
According to ISO 2926:2005, the mass fraction of particle sizes of CR SB08 were determined to be 0.19% in more than 500 μm particle size, 0.89% between 355 and 500 μm particle size, 2.39% between 250 and 355 μm particle size, 4.14% between 212 and 250 μm particle size, 1.66% between 180 and 212 μm particle size, 8.31% between 100 and 180 μm particle size, 34.97% between 53 and 100 μm particle size and 46.82% in less than 53 μm particle size.

The mass median diameter is > 53 μm.
Executive summary:

This test using the procedures outlined in the ZCTC Study Plan for PCF2017-003 and ISO 2926:2005. With a sieve shaker, a certain mass of the sample is sieved through a series of sieves with various aperture size. Each mass of the separate fractions retained in the sieve is weighed and the mass distribution of the particle sizes could be calculated. The relative differences between the sum of all masses and the mass of the sample taken were both less than 1.5%. Therefore, all results were available. The mass fraction of particle sizes of CR SB08 were determined to be 0.19% in more than 500 μm particle size, 0.89% between 355 and 500 μm particle size, 2.39% between 250 and 355 μm particle size, 4.14% between 212 and 250 μm particle size, 1.66% between 180 and 212 μm particle size, 8.31% between 100 and 180 μm particle size, 34.97% between 53 and 100 μm particle size and 46.82% in less than 53 μm particle size.

Description of key information

The mass fraction of particle sizes of CR SB08 were determined to be 0.19% in more than 500 μm particle size, 0.89% between 355 and 500 μm particle size, 2.39% between 250 and 355 μm particle size, 4.14% between 212 and 250 μm particle size, 1.66% between 180 and 212 μm particle size, 8.31% between 100 and 180 μm particle size, 34.97% between 53 and 100 μm particle size and 46.82% in less than 53 μm particle size(ISO 2926:2005).

The mass median diameter is > 53 μm.

Additional information