Amman Mineral Industri (AMIN) was established on 24 March 2009 to build and operate purification facilities for copper concentrate (smelter) and anode-sludge (precious metals refinery – PMR) adjacent to the Batu Hijau mine in West Sumbawa. Currently, these projects are still in the construction, procurement, and installation stages, and AMIN has not yet commenced commercial operation. The smelter and PMR are considered to be National Strategic Projects under the coordination of the Coordinating Ministry for Economic Affairs of the Republic of Indonesia. When in operation, these downstream facilities will further encourage economic growth at the local and national levels.

Main Feature of Smelter

Smelter Feed

Smelter Product

Copper Concentrate –


Silica Flux


220 KTPA Copper Cathode with purity of 99.99%


830 KTPA Sulfuric Acid with concentrate of 98.5%


Main Feature Of Precious Metals Refinery

PMR Feed

PMR Product

Anode Slime


Gold Bar with purity of 99.99%


Silver Bar with purity of 99.95%


Selenium with purity of 99.9%