Ladle skimming slag, Ladle furnace refining, slag, Ferrous slag

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2009

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study meets generally accepted scientific principles. Study acceptable for assessment

Principles of method if other than guideline:

Not reported (routine analysis)

GLP compliance:

no

Type of method:

sieving

Type of distribution:

counted distribution

Percentile:

D50

Mean:

ca. 6 mm

Remarks on result:

other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.

Percentile:

D10

Mean:

ca. 1 mm

Remarks on result:

other: No source/data for Standard deviation.

Percentile:

D90

Mean:

ca. 20 mm

Remarks on result:

other: No source/data for Standard deviation.

Percentile:

other: D3

Mean:

ca. 0.1 mm

Remarks on result:

other: Approximately 3 % w/w of the SMS 0/32 has a diameter of less than 0.1 mm

The grain size distribution (% w/w) of light mineral aggregates corresponds to that of gravel

The grain size distribution (% w/w) of light mineral aggregates

Grain size (mm)	LMA 0-32 (% w/w)
32	100
16	ca. 85
8	ca. 60
4	ca. 35
2	ca. 20
1	ca. 10
0.5	ca. 5
0.25	ca. 4
0.125	ca. 3
0.063	ca. 2

 

Due to the highly porous structure, the specific gravity of aggregates is slightly higher than that of natural soils with corresponding granularity and mostly lower than that of (natural quartz) sand.

Conclusions:

Approximately 3 % w/w of the SMS 0/32 has a diameter of less than 0.1 mm

Executive summary:

Several technical parameters of light mineral aggregates (LMA)), industrially manufactured by semi-fast cooling of the molten slag on top of steel plates immersed in water, were determined. Approximately 3 % w/w of the SMS 0/32 has a diameter of less than 0.1 mm

Description of key information

Slag, pig iron ladle refining, non-granulated, water-cooled is handled as skimmed-off iron ladle. Its particle size is similar to the particle size of SMS 0/32 and ranges from larger lumps in the cm-range to a small percentage of particles being < 0.1 mm. The product is water cooled, and kept humid until shipping takes place.

Additional information

Read-across is envisaged for Slag, pig iron ladle refining, non-granulated, water-cooled. Hence, an analytical determination for asbestos in powder via REM/ECX was performed in accordance with BGIA 7487. The mass content of asbestos in the sample was below 0.008% (w/w). For more details please refer to the attached document.