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Physical & Chemical properties

Particle size distribution (Granulometry)

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Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 18th and 30th, 2011.
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report Date:
2011

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Siever and sieves with case and screen in stainless steel of the ISO 3310-1 series (sieve opening 5 mm, 4 mm, 2.8 mm and 2 mm).
GLP compliance:
yes
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: solid in non-homogenous pieces
Details on test material:
Name: CarboNeXT
Physical state: solid in non-homogenous pieces
Odour: characteristic
Container: plastic bag

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
< 2 mm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Percentile:
D90
Mean:
1 077 µm
Percentile:
D50
Mean:
316 µm
Percentile:
D10
Mean:
40 µm

Any other information on results incl. tables

Sieves:

The particle size distribution obtained for sieving sampleCarboNeXTis showed in Table 1.

The%, cumulativecolumn, contains for each fraction obtained the percentage in weight of the same fraction and of those of the lower fractions.

Table 1

Particle size distribution ofCarboNeXTsample

SIEVE OPENING, mm

%, in weight

%, cumulative

>5,0

46,0

100,0

5,0 ÷ 4,0

3,3

54,0

4,0 ÷ 2,8

3,6

50,7

2,8 ÷ 2,0

5,5

47,1

< 2,0

41,6

41,6

 

Particle size analyzer:

Tests were conducted dispersing the fraction in the air with particle size lower than 2.0 mm of theCarboNeXTsample using the specific sampling unit called SCIROCCO 2000.

The results of the determination on the fraction with particle size lower than 2.0 mm are shown in Fig. 2.

The figure shows the average voluminal diameter as well as that for which the accumulative particle size distribution assumes a respective value of 90%, 50% and 10% in addition to the differential distribution for each fraction and the corresponding graph as well as the measurement parameters and the indications of the powder sample and the operator.

In Table 2, the average voluminal diameter is found as well as that for which the accumulative particle size assumes a respective value of 90%, 50% and 10%.

Table 2

Characteristic diameters of the particle size distribution

SAMPLE

D[4,3]
mm

d(90%)
mm

d(50%)
mm

d(10%)
mm

CarboNeXT

451,68

1077,86

316,39

40,30

Applicant's summary and conclusion

Conclusions:
The particle size is lower than 2.0 mm