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biochar

Protocol number:	M130196
Industry:	Biology, Environment
Feed Size:	< 2 cm
Characteristics:	feuchtes, weiches Material mit vielen organischen-faserigen Bestandteilen.
Desired Fineness:	d50 < 20 µm
Quantity:	100 g
Recommendation:	To reach the desired fineness, we recommend short time grinding with a Planetary Mono Mill PULVERISETTE 6 classic line in suspension.

Result 1

	Planetary Mono Mill PULVERISETTE 6 classic line main disk speed: 620 rpm
Equipment:	500 ml grinding bowl made of zirconium oxide (ZrO2) + 25x 20 mm Ø ZrO2 grinding balls
Material attributes:	soft material with fibrous content.
Feed quantity:	100 g
Feed Size:	< 2 cm
Additive:	+ 160 ml of water
Grinding time:	10 min
Final fineness:	d50 < 7 µm
Comments:	Because of the high moisture content of sample, it is not possible to dry grind this sample. It might be possible after a previous drying step. In our case, we performed a grinding in suspension. The sample has been ground to a homogenous mush within 3 minutes. No longer fibrous particles have been found. We proceed grinding for a total of 10 minutes. After 10 minutes, we checked the fineness using our Laser Particle Sizer ANALYSETTE 22 NanoTec plus. We found a d50 < 6,35 µm which use to fulfill the desired task of d50 < 20 µm. Grinding has been aborted. Probably 5 minutes of grinding might be fulfilling to receive the desired fineness too. We recommend grinding as short as possible, because after grinding, it has shown that balls show a light discoloration, caused by direct contact when balls will hit the bowls wall directly. This light discoloration can be removed by short grinding time of sand and water.
Download:	M130196_Biochar_10min_P6_20_mm.pdf