chromite sand for refractory moulding sand

We import natural chromite ore from south africa,then wash,dry,and sieve in china lianyungang port.

Cr2O3:46.0%min

SiO2 :1.0%max

FeO :26.5%max

CaO :0.30%max

MgO :10.0%max

Al2O3:15.5%max

P:0.003%max

S:0.003%max

Cr/Fe:1.55:1

Bulk Density:2.5-3

Color:Black

PH:7-9

Percent soil:0.1%max

Percent Moisture:0.1%max

Percentage of free acid present in the sand:0

filling density :2.6g/cm³