Slags, lead reverbatory smelting

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: non GLP but other quality assurance

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)

Deviations:

not specified

Principles of method if other than guideline:

The granulometry, i.e. particle size, of the samples are determined by sieving. Sieving is a method where material is separated to finer and rougher sections determined by sieve size. Material is fed on the sieve and then the motion energy between the sieve and the material causes finer material to go through the sieve. The motion can be done efficiently by using ultrasonic washing device. The sieve with material is drowned to washing device and then lifts slowly up. The sieve is kept in the motion so that material is rotating on the sieve. Lifting up and ultrasonic produce an absorbing effect that makes finer material go through the sieve more efficiently. After sieving finer material goes on the top of the next and finer sieve and its sieved again. This continues until the finest material is separated. Residuals separated by sieving are filtered with suction, then dried and weighed. Weighed residuals are reported and the particle size distribution is calculated. The sieves used in sieving are classified ASTM sieves and the grain sizes are from 0,020mm to 3,36mm /7/. The ultrasonic washing is done with Finnsonic M40i.

GLP compliance:

no

Remarks:

other quality assurance

Other quality assurance:

ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)

Type of method:

sieving

Type of particle tested:

other: crushed

Type of distribution:

counted distribution

Test material

Test material information

Constituent 1

Reference substance name:

Slags, lead reverbatory smelting

EC Number:

273-800-2

EC Name:

Slags, lead reverbatory smelting

Cas Number:

69029-58-9

Molecular formula:

Molecular weight/formula concept not applicable to Inorganic UVCB (complex metal containing substance)

IUPAC Name:

Slags, lead reverbatory smelting

Specific details on test material used for the study:

coarse material was crushed to 100% below 3mm particle size.

Results and discussion

Particle size

Particle size 1

Percentile:

other: D80

Mean:

ca. 1 532 µm

Remarks on result:

other: 09TT08044

Particle size 2

Percentile:

D50

Mean:

ca. 444 µm

Remarks on result:

other: 09TT08044

Any other information on results incl. tables

Particle size distribution of a tested sample of slags, lead reverbatory smelting:

	Sample	09TT08044
mesh	mm	%
8	2.38	6.20
16	1.19	20.77
20	0.841	9.17
30	0.595	7.85
40	0.42	7.08
50	0.297	7.11
140	0.105	16.20
200	0.074	4.60
325	0.044	5.33
	0.02	5.41
	<0.02	10.28
Sum		100

Applicant's summary and conclusion

Conclusions:

Slags, lead reverbatory smelting are presented in the form of coarse chunks.

Partcle size distribution was determined; coarse material was first crushed to 100% below 3mm particle size.

D50 of the sample was 444 µm
D80 of the sample was 1532 µm.

Executive summary:

Slags, lead reverbatory smelting are presented in the form of coarse chunks.

Partcle size distribution was determined; coarse material was crushed to 100% below 3mm particle size.

D50 of the sample was 444 µm

D80 of the sample was 1532 µm.