Сhromite ore A 46-48% and type B 38-40%, 4000t each, CIF Tyanjing Port, China

We need chrome ore and concentrate as per the following details:
1.    Asked types: A and B
2.    Type A : 46-48% chrome concentrate
3.    Type B : 38%-40% chrome ore
4.    Quantity : 4000 tons from each type
5.    Delivery : CIF Tyanjing Port /China
6.    It will be used to produce FERRO SILICON
7.    Payment : By LC
Note : we need a past performance when we agree on the details.