Types - grading

Raw vermiculite PP&V from mines in Palabora contains golden to brown flakes which are carefully divided in five categories - each of them has a specific extension of a size of particles.

Micron - grading 0 (0 - 1 mm)				Superfine - grading 1 (0 - 2 mm)
Bulk density:	cca 120 – 130 kg/ m3			Bulk density:	cca 100 - 110 kg/ m3
Manner of packing:	100 l – sack, Big Bag			Manner of packing:	100 l – sack, Big Bag
	Fraction	Proportion			Fraction	Proportion
	2,0 – 1,0 mm	2 – 6%			2,8 – 2,0 mm	< 5%
	1,0 – 0,5 mm	60 – 80%			2,0 – 1,0 mm	45 – 65%
	0,5 – 0,25 mm	20 – 35%			1,0 – 0,5 mm	25 – 40%
	< 0,25 mm	1 – 5%			0,5 – 0,25 mm	< 6%
					< 0,25 mm	< 5%
Fine - grading 3 (0 - 3 mm)				Medium - grading 4 (0 - 5 mm)
Bulk density:	cca 85 - 90 kg/ m3			Bulk density:	cca 80 - 85 kg/ m3
Manner of packing:	100 l – sack, Big Bag			Manner of packing:	100 l – sack, Big Bag
	Fraction	Proportion			Fraction	Proportion
	5,6 – 3,15 mm	< 5%			8,0 – 5,6 mm	< 8%
	3,15 – 2,0 mm	40 – 50%			5,6 – 3,15 mm	30 – 45%
	2,0 – 0,5 mm	45 – 55%			3,15 – 2,0 mm	35 – 45%
	< 0,5 mm	< 5%			2,0 – 1,0 mm	10 – 15%
					< 1,0 mm	< 6%
Large - grading 4 (0 - 8 mm)
Bulk density:	cca 75 - 80 kg/ m3
Manner of packing:	100 l – sack, Big Bag
	Fraction:	Proportion:
	10,0 – 8,0 mm	< 25%
	8,0 – 5,6 mm	40 – 50%
	5,6 – 3,15 mm	30 – 40%
	3,15 – 2,0 mm	2 – 5%
	< 2,0 mm	< 5%