GIBA - Chromit sands

Chromit sands

	Oversized		Factor	Oversized	Factor F₂	theoretical
Sieve	material in		F₁	material in %	for theor.	specific
opening	g	%	for	of sample	specific	surface
	of sample		AFS	x F₁	surface	in cm²
5.600 - 4.000		0	2	0	5	0
4.000 - 2.800		0	3	0	7	0
2.800 - 2.000		0	4	0	9	0
2.000 - 1.400		0	6	0	13	0
1.400 - 1.000		0	9	0	19	0
1.000 - 0.710		0	15	0	26	0
0.710 - 0.500	3.00	3	25	75	37	111
0.500 - 0.355	12.00	12	35	420	53	636
0.355 - 0.250	32.00	32	45	1,440	75	2,400
0.250 - 0.180	30.00	30	60	1,800	105	3,150
0.180 - 0.125	16.00	16	81	1,296	148	2,368
0.125 - 0.090	5.00	5	118	590	211	1,055
0.090 - 0.063	2.00	2	164	328	296	592
0.063 - 0.020		0	275	0	546	0

Cr₂O₃ = 46%
SiO₂ = 1%
Fe₂O₃ = 29%
Al₂O₃ = 16%
MgO = 10%

Melting point > 1,800 °C

MG = 0.25 mm

Theoretical specific surface
In cm²/g = 103.12

Grain fineness number
AFS=59

delivery: silo-trucks, big bags, sacks

Chromit sands are processed natural resources. All data are approximate values with production-related tolerances. They are used to describe and are not a contractual property.

Special Chromit sand CR 30

	Oversized		Factor	Oversized	Factor F2	theoretical
Sieve	material in		F1	material in %	for theor.	specific
opening	g	%	for	of sample	specific	surface
	of sample		AFS	x F1	surface	in cm2
5,600 - 4,000		0	2	0	5	0
4,000 - 2,800		0	3	0	7	0
2,800 - 2,000		0	4	0	9	0
2,000 - 1,400		0	6	0	13	0
1,400 - 1,000		0	9	0	19	0
1,000 - 0,710		0	15	0	26	0
0,710 - 0,500	10,0	10	25	250	37	370
0,500 - 0,355	37,0	37	35	1295	53	1961
0,355 - 0,250	47,0	47	45	2115	75	3525
0,250 - 0,180	5,0	5	60	300	105	525
0,180 - 0,125	1,0	1	81	81	148	148
0,125 - 0,090		0	118	0	211	0
0,090 - 0,063		0	164	0	296	0
0,063 - 0,020		0	275	0	546	0

Theoretical specific surface = 65,29 cm²/g
Grain fineness number AFS = 40