Copper concentrate High Grade from Democratic Republic of Congo

I am looking for copper ore and copper concentrate to be shipped to China. We need a total quantity of 20,000 metric tons. We can provide you with copper concentrate on a monthly basis. The product originates from the Democratic Republic of Congo and is of high grade quality. The purity ranges from 20% to 70%. The price per ton varies from $2300 to $5445. The loading port for the shipment will be Durban.