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Ferrochrome

Protocol number:	M004028
Industry:	Metallurgy
Feed Size:	3-4mm
Desired Fineness:	<160µm
Quantity:	150g
Recommendation:	We recommend using the Planetary Mono Mill PULVERISETTE 6 classic line for grinding your sample. Because a sticking sets in within 10 minutes of grinding, we recommend sieving out the desired fineness fraction and keep on grinding the coarse fraction.

Result 1

	Planetary Mono Mill PULVERISETTE 6 classic line main disk speed: 600 rpm
Equipment:	250 ml grinding bowl made of hardmetal tungsten carbide (WC) + 6x 30 mm Ø WC grinding balls
Feed quantity:	150 g
Feed Size:	4 mm
Grinding time:	10 min / 40 min / 60 min
Final fineness:	15% <160 µm (after 10 min) 51% < 160 µm (after 40min) 80% <160 µm (after 60 min)
Comments:	Even higher amounts of sample (~ up to 250g) can be ground in one bowl. After a grinding time of 10 minutes, ground pieces start sticking and might become sintered together by longer dry grinding times. We recommend sieving out the fine ground desired particle fraction (< 160µm) with e.g. Vibratory Sieve Shaker ANALYSETTE 3 and continue grinding the coarse fraction. Repeat that procedure each 10 minutes until the minimum useful sample volume for this bowl (30ml sample for 250ml bowls) is reached.