Mining capital projects Are you ready for the next CapEx .
The four major steps in the production of marketable copper are mining, concentrating, smelting, and refining. In a few instances, however, leaching takes the place of concentrating, smelting, and refining. At present, although considerable leaching and direct-smelting ores are produced, the bulk of the copper ore mined is concentrated. The milling of copper ores as practiced in the larger .Mining in Indonesia PwC. Mining in Indonesia Tax and Investment Guide 1 Overview of the Indonesian Mining Industry Indonesia continues to be a significant player in the global mining industry with significant production of coal, copper, gold, tin and nickel.