Copper concentrates

Used as raw materials in copper smelting, copper concentrates have a copper content of about 30% by weight. The remainder consists mostly of sulfur and iron. Copper concentrates are made mostly from sulfide ores.
Ores extracted from overseas mines have a typical grade of about 1%. The ores are then "dressed" at the mine to increase the purity and produce concentrate. Most of the copper ores imported by SMM for smelting in Japan are concentrates.

Simulation of unit conversion

Unit conversion table

toz g kg
1 31.1 0.0311
0.0321 1 0.001
32.15 1000 1
lb g kg
1 454 0.454
0.0022 1 0.001
2.205 1000 1