Registration Dossier
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EC number: 293-314-4 | CAS number: 91053-49-5 Insoluble substance obtained during dissolution of zinc ores or concentrate in sulfuric acid for the production of zinc sulfate solutions after physical separation such as flotation and filtration.
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM E323-09 standard specification for perforated plate sieves for testing purposes
- GLP compliance:
- not specified
- Type of method:
- sieving
- Type of distribution:
- volumetric distribution
- Percentile:
- D50
- Mean:
- 23 µm
- Remarks on result:
- other: Standard deviation not specified
- Percentile:
- other: D80
- Mean:
- 63 µm
- Remarks on result:
- other: Standard deviation not specified
- Conclusions:
- test done according to standard protocol, useful to assess the characteristic of the substance
- Executive summary:
The particle size of the substance was determined by sieving.
The D50 of the substance is 23 µm, the D80 is 63 µm.
Reference
Particle size distribution of sample (see also figure attached)
Size |
|
Retained |
|
mesh |
mm |
g |
% |
20 |
0.841 |
0.01 |
0.01 |
30 |
0.595 |
0.02 |
0.03 |
40 |
0.42 |
0.01 |
0.01 |
50 |
0.297 |
0.05 |
0.07 |
100 |
0.149 |
1.62 |
2.31 |
140 |
0.105 |
2.44 |
3.48 |
200 |
0.075 |
5.60 |
7.98 |
325 |
0.045 |
11.29 |
16.09 |
|
0.02 |
16.32 |
23.26 |
|
-0.02 |
32.80 |
46.75 |
Sum |
|
70.16 |
100.00 |
Description of key information
The D50 of the substance is 23 µm, the D80 is 63 µm (Outotec, 2010).
Additional information
Various types of leach residues were analyzed. They display differences in phys-chem. properties depending on their chemical composition. The most representative leach residue was used.
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